Merge remote-tracking branch 'origin/4.13'

Change-Id: Ie67085fcbb4150c60f0253312e19a82b95b4a898

doc/qtcreator/src/android/androiddev.qdoc

@@ -57,11 +57,11 @@
     To use \QC to develop Qt applications for Android, you need the following:
 
     \list
-        \li \l{https://www.oracle.com/java/technologies/javase-jdk8-downloads.html}
-            {Java SE Development Kit (JDK)} version 6 up to 8.
-            You can also use \l{http://openjdk.java.net/}{OpenJDK} on Linux.
+        \li \l{AdoptOpenJDK} for all platforms. You can also use \l{OpenJDK}
+            on Linux.
 
-            \note Android SDK Tools have issues with JDK versions later than 8.
+            \note Android SDK Tools versions <= 26.x have issues with JDK versions
+            later than 8. It is recommended to use the latest Command-line SDK Tools.
 
         \li \l{http://www.gradle.org}{Gradle} for building application packages
             (APK) and app bundles (AAB) for Android devices. Gradle is delivered

doc/qtcreator/src/cmake/creator-projects-cmake.qdoc

@@ -59,7 +59,7 @@
 
     \section1 Adding CMake Tools
 
-    \QC requires CMake's {https://cmake.org/cmake/help/latest/manual/cmake-file-api.7.html}
+    \QC requires CMake's \l{https://cmake.org/cmake/help/latest/manual/cmake-file-api.7.html}
     {file-based API}.  Please make sure to use CMake version 3.14, or later.
 
     To specify paths to CMake executables:

doc/qtcreator/src/external-resources/external-resources.qdoc

@@ -45,3 +45,11 @@
     \externalpage https://doc.qt.io/QtForMCUs/qtul-getting-started-windows.html
     \title Getting Started on Windows
 */
+/*!
+    \externalpage https://adoptopenjdk.net/
+    \title AdoptOpenJDK
+*/
+/*!
+    \externalpage http://openjdk.java.net
+    \title OpenJDK
+*/

share/qtcreator/qml/qmlpuppet/commands/createscenecommand.cpp

@@ -40,7 +40,8 @@ CreateSceneCommand::CreateSceneCommand(const QVector<InstanceContainer> &instanc
                                        const QVector<AddImportContainer> &importVector,
                                        const QVector<MockupTypeContainer> &mockupTypeVector,
                                        const QUrl &fileUrl,
-                                       const QHash<QString, QVariantMap> &edit3dToolStates)
+                                       const QHash<QString, QVariantMap> &edit3dToolStates,
+                                       const QString &language)
     : m_instanceVector(instanceContainer),
       m_reparentInstanceVector(reparentContainer),
       m_idVector(idVector),
@@ -50,7 +51,8 @@ CreateSceneCommand::CreateSceneCommand(const QVector<InstanceContainer> &instanc
       m_importVector(importVector),
       m_mockupTypeVector(mockupTypeVector),
       m_fileUrl(fileUrl),
-      m_edit3dToolStates(edit3dToolStates)
+      m_edit3dToolStates(edit3dToolStates),
+      m_language(language)
 {
 }
 
@@ -104,6 +106,11 @@ QHash<QString, QVariantMap> CreateSceneCommand::edit3dToolStates() const
     return m_edit3dToolStates;
 }
 
+QString CreateSceneCommand::language() const
+{
+    return m_language;
+}
+
 QDataStream &operator<<(QDataStream &out, const CreateSceneCommand &command)
 {
     out << command.instances();
@@ -116,6 +123,7 @@ QDataStream &operator<<(QDataStream &out, const CreateSceneCommand &command)
     out << command.mockupTypes();
     out << command.fileUrl();
     out << command.edit3dToolStates();
+    out << command.language();
 
     return out;
 }
@@ -132,6 +140,7 @@ QDataStream &operator>>(QDataStream &in, CreateSceneCommand &command)
     in >> command.m_mockupTypeVector;
     in >> command.m_fileUrl;
     in >> command.m_edit3dToolStates;
+    in >> command.m_language;
 
     return in;
 }
@@ -148,7 +157,8 @@ QDebug operator <<(QDebug debug, const CreateSceneCommand &command)
                     << "imports: " << command.imports() << ", "
                     << "mockupTypes: " << command.mockupTypes() << ", "
                     << "fileUrl: " << command.fileUrl() << ", "
-                    << "edit3dToolStates: " << command.edit3dToolStates() << ")";
+                    << "edit3dToolStates: " << command.edit3dToolStates() << ", "
+                    << "language: " << command.language() << ")";
 }
 
 }

share/qtcreator/qml/qmlpuppet/commands/createscenecommand.h

@@ -45,16 +45,18 @@ class CreateSceneCommand
 
 public:
     CreateSceneCommand();
-    explicit CreateSceneCommand(const QVector<InstanceContainer> &instanceContainer,
-                       const QVector<ReparentContainer> &reparentContainer,
-                       const QVector<IdContainer> &idVector,
-                       const QVector<PropertyValueContainer> &valueChangeVector,
-                       const QVector<PropertyBindingContainer> &bindingChangeVector,
-                       const QVector<PropertyValueContainer> &auxiliaryChangeVector,
-                       const QVector<AddImportContainer> &importVector,
-                       const QVector<MockupTypeContainer> &mockupTypeVector,
-                       const QUrl &fileUrl,
-                       const QHash<QString, QVariantMap> &edit3dToolStates);
+    explicit CreateSceneCommand(
+        const QVector<InstanceContainer> &instanceContainer,
+        const QVector<ReparentContainer> &reparentContainer,
+        const QVector<IdContainer> &idVector,
+        const QVector<PropertyValueContainer> &valueChangeVector,
+        const QVector<PropertyBindingContainer> &bindingChangeVector,
+        const QVector<PropertyValueContainer> &auxiliaryChangeVector,
+        const QVector<AddImportContainer> &importVector,
+        const QVector<MockupTypeContainer> &mockupTypeVector,
+        const QUrl &fileUrl,
+        const QHash<QString, QVariantMap> &edit3dToolStates,
+        const QString &language);
 
     QVector<InstanceContainer> instances() const;
     QVector<ReparentContainer> reparentInstances() const;
@@ -66,6 +68,7 @@ public:
     QVector<MockupTypeContainer> mockupTypes() const;
     QUrl fileUrl() const;
     QHash<QString, QVariantMap> edit3dToolStates() const;
+    QString language() const;
 
 private:
     QVector<InstanceContainer> m_instanceVector;
@@ -78,6 +81,7 @@ private:
     QVector<MockupTypeContainer> m_mockupTypeVector;
     QUrl m_fileUrl;
     QHash<QString, QVariantMap> m_edit3dToolStates;
+    QString m_language;
 };
 
 QDataStream &operator<<(QDataStream &out, const CreateSceneCommand &command);

share/qtcreator/qml/qmlpuppet/mockfiles/DirectionalDraggable.qml

@@ -104,6 +104,7 @@ Model {
         grabsMouse: targetNode
         active: rootModel.active
         dragHelper: rootModel.dragHelper
+        priority: 5
 
         onPressed: rootModel.handlePressed(mouseAreaYZ, planePos, screenPos)
         onDragged: rootModel.handleDragged(mouseAreaYZ, planePos, screenPos)
@@ -121,6 +122,7 @@ Model {
         grabsMouse: targetNode
         active: rootModel.active
         dragHelper: rootModel.dragHelper
+        priority: 5
 
         onPressed: rootModel.handlePressed(mouseAreaXZ, planePos, screenPos)
         onDragged: rootModel.handleDragged(mouseAreaXZ, planePos, screenPos)

share/qtcreator/qml/qmlpuppet/mockfiles/MoveGizmo.qml

@@ -161,7 +161,7 @@ Node {
         color: highlightOnHover && (hovering || dragging) ? Qt.lighter(Qt.rgba(0.5, 0.5, 0.5, 1))
                                                           : Qt.rgba(0.5, 0.5, 0.5, 1)
         rotation: view3D.camera.rotation
-        priority: 1
+        priority: 10
         targetNode: moveGizmo.targetNode
 
         view3D: moveGizmo.view3D

share/qtcreator/qml/qmlpuppet/mockfiles/ScaleGizmo.qml

@@ -185,7 +185,7 @@ Node {
             height: 120
             rotation: view3D.camera.rotation
             grabsMouse: scaleGizmo.targetNode
-            priority: 1
+            priority: 10
             active: scaleGizmo.visible
             dragHelper: scaleGizmo.dragHelper
 

share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp

@@ -314,6 +314,7 @@ void NodeInstanceServer::stopRenderTimer()
 
 void NodeInstanceServer::createScene(const CreateSceneCommand &command)
 {
+    setTranslationLanguage(command.language());
     initializeView();
 
     Internal::QmlPrivateGate::stopUnifiedTimer();
@@ -1329,6 +1330,20 @@ void NodeInstanceServer::loadDummyContextObjectFile(const QFileInfo& qmlFileInfo
     refreshBindings();
 }
 
+void NodeInstanceServer::setTranslationLanguage(const QString &language)
+{
+    static QPointer<MultiLanguage::Translator> multilanguageTranslator;
+    if (!MultiLanguage::databaseFilePath().isEmpty()) {
+        if (!multilanguageLink) {
+            multilanguageLink = std::make_unique<MultiLanguage::Link>();
+            multilanguageTranslator = multilanguageLink->translator().release();
+            QCoreApplication::installTranslator(multilanguageTranslator);
+        }
+        if (multilanguageTranslator)
+            multilanguageTranslator->setLanguage(language);
+    }
+}
+
 void NodeInstanceServer::loadDummyDataFiles(const QString& directory)
 {
     QDir dir(directory, "*.qml");
@@ -1400,16 +1415,7 @@ void NodeInstanceServer::view3DAction(const View3DActionCommand &command)
 
 void NodeInstanceServer::changeLanguage(const ChangeLanguageCommand &command)
 {
-    static QPointer<MultiLanguage::Translator> multilanguageTranslator;
-    if (!MultiLanguage::databaseFilePath().isEmpty()) {
-        if (!multilanguageLink) {
-            multilanguageLink = std::make_unique<MultiLanguage::Link>();
-            multilanguageTranslator = multilanguageLink->translator().release();
-            QCoreApplication::installTranslator(multilanguageTranslator);
-        }
-        if (multilanguageTranslator)
-            multilanguageTranslator->setLanguage(command.language);
-    }
+    setTranslationLanguage(command.language);
     QEvent ev(QEvent::LanguageChange);
     QCoreApplication::sendEvent(QCoreApplication::instance(), &ev);
     engine()->retranslate();

share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.h

@@ -241,6 +241,7 @@ protected:
 
     virtual void initializeView() = 0;
     virtual void setupScene(const CreateSceneCommand &command) = 0;
+    void setTranslationLanguage(const QString &language);
     void loadDummyDataFiles(const QString& directory);
     void loadDummyDataContext(const QString& directory);
     void loadDummyDataFile(const QFileInfo& fileInfo);

share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5previewnodeinstanceserver.cpp

@@ -46,6 +46,7 @@ Qt5PreviewNodeInstanceServer::Qt5PreviewNodeInstanceServer(NodeInstanceClientInt
 
 void Qt5PreviewNodeInstanceServer::createScene(const CreateSceneCommand &command)
 {
+    setTranslationLanguage(command.language());
     initializeView();
     setupScene(command);
     startRenderTimer();

share/qtcreator/qml/qmlpuppet/qml2puppet/qml2puppet.pri

@@ -5,9 +5,11 @@ CONFIG += c++11
 
 DEFINES -= QT_CREATOR
 
-# This .pri file contains classes to enable a special multilanguage translator debug service
+# This .pri file contains classes to enable a special multilanguage translator
 MULTILANGUAGE_SUPPORT_PRI=$$(MULTILANGUAGE_SUPPORT_PRI)
 !isEmpty(MULTILANGUAGE_SUPPORT_PRI) {
+    exists($$(MULTILANGUAGE_SUPPORT_PRI)): message(including \"$$(MULTILANGUAGE_SUPPORT_PRI)\")
+    else: error("MULTILANGUAGE_SUPPORT_PRI: \"$$(MULTILANGUAGE_SUPPORT_PRI)\" does not exist.")
     include($$(MULTILANGUAGE_SUPPORT_PRI))
     DEFINES += MULTILANGUAGE_TRANSLATIONPROVIDER
 }

src/libs/qmldebug/qmldebugcommandlinearguments.h

@@ -47,11 +47,11 @@ inline QString qmlDebugServices(QmlDebugServicesPreset preset)
     case NoQmlDebugServices:
         return QString();
     case QmlDebuggerServices:
-        return QStringLiteral("DebugMessages,QmlDebugger,V8Debugger,QmlInspector");
+        return QStringLiteral("DebugMessages,QmlDebugger,V8Debugger,QmlInspector,DebugTranslation");
     case QmlProfilerServices:
-        return QStringLiteral("CanvasFrameRate,EngineControl,DebugMessages");
+        return QStringLiteral("CanvasFrameRate,EngineControl,DebugMessages,DebugTranslation");
     case QmlNativeDebuggerServices:
-        return QStringLiteral("NativeQmlDebugger");
+        return QStringLiteral("NativeQmlDebugger,DebugTranslation");
     case QmlPreviewServices:
         return QStringLiteral("QmlPreview,DebugTranslation");
     default:

src/libs/qmljs/qmljscheck.cpp

@@ -621,7 +621,6 @@ class UnsupportedTypesByQmlUi : public QStringList
 public:
     UnsupportedTypesByQmlUi() : QStringList({"ShaderEffect",
                                              "Component",
-                                             "Transition",
                                              "Drawer"})
     {
         append(UnsupportedTypesByVisualDesigner());

src/libs/sqlite/sqlitebasestatement.cpp

@@ -251,10 +251,46 @@ sqlite3 *BaseStatement::sqliteDatabaseHandle() const
 void BaseStatement::checkForStepError(int resultCode) const
 {
     switch (resultCode) {
-        case SQLITE_BUSY: throwStatementIsBusy("SqliteStatement::stepStatement: database engine was unable to acquire the database locks!");
-        case SQLITE_ERROR : throwStatementHasError("SqliteStatement::stepStatement: run-time error (such as a constraint violation) has occurred!");
-        case SQLITE_MISUSE:  throwStatementIsMisused("SqliteStatement::stepStatement: was called inappropriately!");
-        case SQLITE_CONSTRAINT:  throwConstraintPreventsModification("SqliteStatement::stepStatement: contraint prevent insert or update!");
+    case SQLITE_BUSY:
+        throwStatementIsBusy("SqliteStatement::stepStatement: database engine was unable to "
+                             "acquire the database locks!");
+    case SQLITE_ERROR:
+        throwStatementHasError("SqliteStatement::stepStatement: run-time error (such as a "
+                               "constraint violation) has occurred!");
+    case SQLITE_MISUSE:
+        throwStatementIsMisused("SqliteStatement::stepStatement: was called inappropriately!");
+    case SQLITE_CONSTRAINT:
+        throwConstraintPreventsModification(
+            "SqliteStatement::stepStatement: contraint prevent insert or update!");
+    case SQLITE_TOOBIG:
+        throwTooBig("SqliteStatement::stepStatement: Some is to bigger than SQLITE_MAX_LENGTH.");
+    case SQLITE_SCHEMA:
+        throwSchemaChangeError("SqliteStatement::stepStatement: Schema changed but the statement "
+                               "cannot be recompiled.");
+    case SQLITE_READONLY:
+        throwCannotWriteToReadOnlyConnection(
+            "SqliteStatement::stepStatement: Cannot write to read only connection");
+    case SQLITE_PROTOCOL:
+        throwProtocolError(
+            "SqliteStatement::stepStatement: Something strang with the file locking happened.");
+    case SQLITE_NOMEM:
+        throw std::bad_alloc();
+    case SQLITE_NOLFS:
+        throwDatabaseExceedsMaximumFileSize(
+            "SqliteStatement::stepStatement: Database exceeds maximum file size.");
+    case SQLITE_MISMATCH:
+        throwDataTypeMismatch(
+            "SqliteStatement::stepStatement: Most probably you used not an integer for a rowid.");
+    case SQLITE_LOCKED:
+        throwConnectionIsLocked("SqliteStatement::stepStatement: Database connection is locked.");
+    case SQLITE_IOERR:
+        throwInputOutputError("SqliteStatement::stepStatement: An IO error happened.");
+    case SQLITE_INTERRUPT:
+        throwExecutionInterrupted("SqliteStatement::stepStatement: Execution was interrupted.");
+    case SQLITE_CORRUPT:
+        throwDatabaseIsCorrupt("SqliteStatement::stepStatement: Database is corrupt.");
+    case SQLITE_CANTOPEN:
+        throwCannotOpen("SqliteStatement::stepStatement: Cannot open database or temporary file.");
     }
 
     throwUnknowError("SqliteStatement::stepStatement: unknown error has happened");
@@ -263,10 +299,17 @@ void BaseStatement::checkForStepError(int resultCode) const
 void BaseStatement::checkForResetError(int resultCode) const
 {
     switch (resultCode) {
-        case SQLITE_BUSY: throwStatementIsBusy("SqliteStatement::stepStatement: database engine was unable to acquire the database locks!");
-        case SQLITE_ERROR : throwStatementHasError("SqliteStatement::stepStatement: run-time error (such as a constraint violation) has occurred!");
-        case SQLITE_MISUSE:  throwStatementIsMisused("SqliteStatement::stepStatement: was called inappropriately!");
-        case SQLITE_CONSTRAINT:  throwConstraintPreventsModification("SqliteStatement::stepStatement: contraint prevent insert or update!");
+    case SQLITE_BUSY:
+        throwStatementIsBusy("SqliteStatement::stepStatement: database engine was unable to "
+                             "acquire the database locks!");
+    case SQLITE_ERROR:
+        throwStatementHasError("SqliteStatement::stepStatement: run-time error (such as a "
+                               "constraint violation) has occurred!");
+    case SQLITE_MISUSE:
+        throwStatementIsMisused("SqliteStatement::stepStatement: was called inappropriately!");
+    case SQLITE_CONSTRAINT:
+        throwConstraintPreventsModification(
+            "SqliteStatement::stepStatement: contraint prevent insert or update!");
     }
 
     throwUnknowError("SqliteStatement::reset: unknown error has happened");
@@ -278,7 +321,8 @@ void BaseStatement::checkForPrepareError(int resultCode) const
         case SQLITE_BUSY: throwStatementIsBusy("SqliteStatement::prepareStatement: database engine was unable to acquire the database locks!");
         case SQLITE_ERROR : throwStatementHasError("SqliteStatement::prepareStatement: run-time error (such as a constraint violation) has occurred!");
         case SQLITE_MISUSE: throwStatementIsMisused("SqliteStatement::prepareStatement: was called inappropriately!");
-        case SQLITE_IOERR: throwIoError("SqliteStatement::prepareStatement: IO error happened!");
+        case SQLITE_IOERR:
+            throwInputOutputError("SqliteStatement::prepareStatement: IO error happened!");
     }
 
     throwUnknowError("SqliteStatement::prepareStatement: unknown error has happened");
@@ -346,9 +390,9 @@ void BaseStatement::throwStatementIsMisused(const char *whatHasHappened) const
     throw StatementIsMisused(whatHasHappened, sqlite3_errmsg(sqliteDatabaseHandle()));
 }
 
-void BaseStatement::throwIoError(const char *whatHasHappened) const
+void BaseStatement::throwInputOutputError(const char *whatHasHappened) const
 {
-    throw IoError(whatHasHappened);
+    throw InputOutputError(whatHasHappened);
 }
 
 void BaseStatement::throwConstraintPreventsModification(const char *whatHasHappened) const
@@ -384,6 +428,56 @@ void BaseStatement::throwBingingTooBig(const char *whatHasHappened) const
     throw BindingTooBig(whatHasHappened, sqlite3_errmsg(sqliteDatabaseHandle()));
 }
 
+void BaseStatement::throwTooBig(const char *whatHasHappened) const
+{
+    throw TooBig{whatHasHappened, sqlite3_errmsg(sqliteDatabaseHandle())};
+}
+
+void BaseStatement::throwSchemaChangeError(const char *whatHasHappened) const
+{
+    throw SchemeChangeError{whatHasHappened, sqlite3_errmsg(sqliteDatabaseHandle())};
+}
+
+void BaseStatement::throwCannotWriteToReadOnlyConnection(const char *whatHasHappened) const
+{
+    throw CannotWriteToReadOnlyConnection{whatHasHappened, sqlite3_errmsg(sqliteDatabaseHandle())};
+}
+
+void BaseStatement::throwProtocolError(const char *whatHasHappened) const
+{
+    throw ProtocolError{whatHasHappened, sqlite3_errmsg(sqliteDatabaseHandle())};
+}
+
+void BaseStatement::throwDatabaseExceedsMaximumFileSize(const char *whatHasHappened) const
+{
+    throw DatabaseExceedsMaximumFileSize{whatHasHappened, sqlite3_errmsg(sqliteDatabaseHandle())};
+}
+
+void BaseStatement::throwDataTypeMismatch(const char *whatHasHappened) const
+{
+    throw DataTypeMismatch{whatHasHappened, sqlite3_errmsg(sqliteDatabaseHandle())};
+}
+
+void BaseStatement::throwConnectionIsLocked(const char *whatHasHappened) const
+{
+    throw ConnectionIsLocked{whatHasHappened, sqlite3_errmsg(sqliteDatabaseHandle())};
+}
+
+void BaseStatement::throwExecutionInterrupted(const char *whatHasHappened) const
+{
+    throw ExecutionInterrupted{whatHasHappened};
+}
+
+void BaseStatement::throwDatabaseIsCorrupt(const char *whatHasHappened) const
+{
+    throw DatabaseIsCorrupt{whatHasHappened};
+}
+
+void BaseStatement::throwCannotOpen(const char *whatHasHappened) const
+{
+    throw CannotOpen{whatHasHappened};
+}
+
 QString BaseStatement::columnName(int column) const
 {
     return QString::fromUtf8(sqlite3_column_name(m_compiledStatement.get(), column));

src/libs/sqlite/sqlitebasestatement.h

@@ -109,7 +109,7 @@ public:
     [[noreturn]] void throwStatementIsBusy(const char *whatHasHappened) const;
     [[noreturn]] void throwStatementHasError(const char *whatHasHappened) const;
     [[noreturn]] void throwStatementIsMisused(const char *whatHasHappened) const;
-    [[noreturn]] void throwIoError(const char *whatHasHappened) const;
+    [[noreturn]] void throwInputOutputError(const char *whatHasHappened) const;
     [[noreturn]] void throwConstraintPreventsModification(const char *whatHasHappened) const;
     [[noreturn]] void throwNoValuesToFetch(const char *whatHasHappened) const;
     [[noreturn]] void throwInvalidColumnFetched(const char *whatHasHappened) const;
@@ -117,6 +117,16 @@ public:
     [[noreturn]] void throwWrongBingingName(const char *whatHasHappened) const;
     [[noreturn]] void throwUnknowError(const char *whatHasHappened) const;
     [[noreturn]] void throwBingingTooBig(const char *whatHasHappened) const;
+    [[noreturn]] void throwTooBig(const char *whatHasHappened) const;
+    [[noreturn]] void throwSchemaChangeError(const char *whatHasHappened) const;
+    [[noreturn]] void throwCannotWriteToReadOnlyConnection(const char *whatHasHappened) const;
+    [[noreturn]] void throwProtocolError(const char *whatHasHappened) const;
+    [[noreturn]] void throwDatabaseExceedsMaximumFileSize(const char *whatHasHappened) const;
+    [[noreturn]] void throwDataTypeMismatch(const char *whatHasHappened) const;
+    [[noreturn]] void throwConnectionIsLocked(const char *whatHasHappened) const;
+    [[noreturn]] void throwExecutionInterrupted(const char *whatHasHappened) const;
+    [[noreturn]] void throwDatabaseIsCorrupt(const char *whatHasHappened) const;
+    [[noreturn]] void throwCannotOpen(const char *whatHasHappened) const;
 
     QString columnName(int column) const;
 

src/libs/sqlite/sqliteexception.h

@@ -91,10 +91,10 @@ public:
     }
 };
 
-class IoError : public Exception
+class InputOutputError : public Exception
 {
 public:
-    IoError(const char *whatErrorHasHappen)
+    InputOutputError(const char *whatErrorHasHappen)
         : Exception(whatErrorHasHappen)
     {
     }
@@ -267,6 +267,14 @@ public:
     }
 };
 
+class TooBig : public Exception
+{
+public:
+    TooBig(const char *whatErrorHasHappen, Utils::SmallString &&errorMessage = Utils::SmallString())
+        : Exception(whatErrorHasHappen, std::move(errorMessage))
+    {}
+};
+
 class CannotConvert : public Exception
 {
 public:
@@ -299,4 +307,84 @@ public:
     {}
 };
 
+class SchemeChangeError : public Exception
+{
+public:
+    SchemeChangeError(const char *whatErrorHasHappen,
+                      Utils::SmallString &&errorMessage = Utils::SmallString())
+        : Exception(whatErrorHasHappen, std::move(errorMessage))
+    {}
+};
+
+class CannotWriteToReadOnlyConnection : public Exception
+{
+public:
+    CannotWriteToReadOnlyConnection(const char *whatErrorHasHappen,
+                                    Utils::SmallString &&errorMessage = Utils::SmallString())
+        : Exception(whatErrorHasHappen, std::move(errorMessage))
+    {}
+};
+
+class ProtocolError : public Exception
+{
+public:
+    ProtocolError(const char *whatErrorHasHappen,
+                  Utils::SmallString &&errorMessage = Utils::SmallString())
+        : Exception(whatErrorHasHappen, std::move(errorMessage))
+    {}
+};
+
+class DatabaseExceedsMaximumFileSize : public Exception
+{
+public:
+    DatabaseExceedsMaximumFileSize(const char *whatErrorHasHappen,
+                                   Utils::SmallString &&errorMessage = Utils::SmallString())
+        : Exception(whatErrorHasHappen, std::move(errorMessage))
+    {}
+};
+
+class DataTypeMismatch : public Exception
+{
+public:
+    DataTypeMismatch(const char *whatErrorHasHappen,
+                     Utils::SmallString &&errorMessage = Utils::SmallString())
+        : Exception(whatErrorHasHappen, std::move(errorMessage))
+    {}
+};
+
+class ConnectionIsLocked : public Exception
+{
+public:
+    ConnectionIsLocked(const char *whatErrorHasHappen,
+                       Utils::SmallString &&errorMessage = Utils::SmallString())
+        : Exception(whatErrorHasHappen, std::move(errorMessage))
+    {}
+};
+
+class ExecutionInterrupted : public Exception
+{
+public:
+    ExecutionInterrupted(const char *whatErrorHasHappen,
+                         Utils::SmallString &&errorMessage = Utils::SmallString())
+        : Exception(whatErrorHasHappen, std::move(errorMessage))
+    {}
+};
+
+class DatabaseIsCorrupt : public Exception
+{
+public:
+    DatabaseIsCorrupt(const char *whatErrorHasHappen,
+                      Utils::SmallString &&errorMessage = Utils::SmallString())
+        : Exception(whatErrorHasHappen, std::move(errorMessage))
+    {}
+};
+
+class CannotOpen : public Exception
+{
+public:
+    CannotOpen(const char *whatErrorHasHappen,
+               Utils::SmallString &&errorMessage = Utils::SmallString())
+        : Exception(whatErrorHasHappen, std::move(errorMessage))
+    {}
+};
 } // namespace Sqlite

src/plugins/android/androidsettingswidget.cpp

@@ -454,8 +454,6 @@ AndroidSettingsWidget::AndroidSettingsWidget()
     m_ui.AVDTableView->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
     m_ui.AVDTableView->horizontalHeader()->setSectionResizeMode(1, QHeaderView::ResizeToContents);
 
-    m_ui.downloadOpenJDKToolButton->setVisible(!HostOsInfo::isLinuxHost());
-
     const QIcon downloadIcon = Icons::ONLINE.icon();
     m_ui.downloadSDKToolButton->setIcon(downloadIcon);
     m_ui.downloadNDKToolButton->setIcon(downloadIcon);
@@ -696,7 +694,10 @@ void AndroidSettingsWidget::openNDKDownloadUrl()
 
 void AndroidSettingsWidget::openOpenJDKDownloadUrl()
 {
-    QDesktopServices::openUrl(QUrl::fromUserInput("https://www.oracle.com/java/technologies/javase-jdk8-downloads.html"));
+    if (HostOsInfo::isLinuxHost())
+        QDesktopServices::openUrl(QUrl::fromUserInput("https://openjdk.java.net/install/"));
+    else
+        QDesktopServices::openUrl(QUrl::fromUserInput("https://adoptopenjdk.net/"));
 }
 
 void AndroidSettingsWidget::downloadOpenSslRepo(const bool silent)

src/plugins/clangformat/clangformatplugin.cpp

@@ -153,12 +153,15 @@ bool ClangFormatPlugin::initialize(const QStringList &arguments, QString *errorS
     }
     return true;
 #else
-#ifndef Q_CC_MSVC
+#ifdef _MSC_VER
+#pragma message( \
+    "ClangFormat: building dummy plugin due to unmodified Clang, see README.md for more info")
+#else
 #warning ClangFormat: building dummy plugin due to unmodified Clang, see README.md for more info
 #endif
-    *errorString = QStringLiteral("Disabling ClangFormat plugin as it has not been built against a modified Clang's libFormat."
+    *errorString = "Disabling ClangFormat plugin as it has not been built against a modified Clang's libFormat."
                    "For more information see the Qt Creator README at "
-                   "https://code.qt.io/cgit/qt-creator/qt-creator.git/tree/README.md");
+                   "https://code.qt.io/cgit/qt-creator/qt-creator.git/tree/README.md";
     return false;
 #endif
 }

src/plugins/qmldesigner/CMakeLists.txt

@@ -38,6 +38,29 @@ if (APPLE)
   set(QmlDesignerPluginInstallPrefix "${IDE_PLUGIN_PATH}/QmlDesigner")
 endif()
 
+
+add_qtc_plugin(assetexporterplugin
+  CONDITION TARGET QmlDesigner
+  DEPENDS Core ProjectExplorer QmlDesigner Utils Qt5::Qml
+  PUBLIC_INCLUDES assetexporterplugin
+  SOURCES
+    assetexporterplugin/assetexportdialog.h assetexporterplugin/assetexportdialog.cpp assetexporterplugin/assetexportdialog.ui
+    assetexporterplugin/assetexporter.h assetexporterplugin/assetexporter.cpp
+    assetexporterplugin/assetexporterplugin.h assetexporterplugin/assetexporterplugin.cpp
+    assetexporterplugin/assetexporterview.h assetexporterplugin/assetexporterview.cpp
+    assetexporterplugin/assetexportpluginconstants.h
+    assetexporterplugin/componentexporter.h assetexporterplugin/componentexporter.cpp
+    assetexporterplugin/exportnotification.h assetexporterplugin/exportnotification.cpp
+    assetexporterplugin/filepathmodel.h assetexporterplugin/filepathmodel.cpp
+    assetexporterplugin/parsers/assetnodeparser.h assetexporterplugin/parsers/assetnodeparser.cpp
+    assetexporterplugin/parsers/modelitemnodeparser.h assetexporterplugin/parsers/modelitemnodeparser.cpp
+    assetexporterplugin/parsers/modelnodeparser.h assetexporterplugin/parsers/modelnodeparser.cpp
+    assetexporterplugin/parsers/textnodeparser.h assetexporterplugin/parsers/textnodeparser.cpp
+    assetexporterplugin/assetexporterplugin.qrc
+  PLUGIN_PATH ${QmlDesignerPluginInstallPrefix}
+  SKIP_DEBUG_CMAKE_FILE_CHECK
+)
+
 add_qtc_plugin(componentsplugin
   CONDITION TARGET QmlDesigner
   DEPENDS Core QmlDesigner Utils Qt5::Qml
@@ -646,6 +669,22 @@ extend_qtc_plugin(QmlDesigner
     timelinewidget.cpp timelinewidget.h
 )
 
+extend_qtc_plugin(QmlDesigner
+  SOURCES_PREFIX components/transitioneditor
+  SOURCES
+    transitioneditorview.cpp transitioneditorview.h
+    transitioneditorwidget.cpp transitioneditorwidget.h
+    transitioneditortoolbar.cpp transitioneditortoolbar.h
+    transitioneditorgraphicsscene.cpp transitioneditorgraphicsscene.h
+    transitioneditorgraphicslayout.cpp transitioneditorgraphicslayout.h
+    transitioneditorsectionitem.cpp transitioneditorsectionitem.h
+    transitioneditorpropertyitem.cpp transitioneditorpropertyitem.h
+    transitioneditorsettingsdialog.cpp transitioneditorsettingsdialog.h
+    transitioneditorsettingsdialog.ui
+    transitionform.cpp transitionform.h
+    transitioneditor.qrc
+)
+
 extend_qtc_plugin(QmlDesigner
   SOURCES_PREFIX components/curveeditor
   SOURCES

src/plugins/qmldesigner/assetexporterplugin/assetexportdialog.cpp

@@ -0,0 +1,190 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#include "assetexportdialog.h"
+
+#include "ui_assetexportdialog.h"
+#include "assetexportpluginconstants.h"
+#include "filepathmodel.h"
+
+#include "coreplugin/fileutils.h"
+#include "coreplugin/icore.h"
+#include "projectexplorer/task.h"
+#include "projectexplorer/taskhub.h"
+#include "utils/fileutils.h"
+#include "utils/outputformatter.h"
+
+#include <QPushButton>
+#include <QListView>
+#include <QPlainTextEdit>
+#include <QDialogButtonBox>
+#include <QMessageBox>
+#include <QScrollBar>
+
+#include <algorithm>
+#include <cmath>
+
+namespace  {
+static void addFormattedMessage(Utils::OutputFormatter *formatter, const QString &str,
+                                Utils::OutputFormat format) {
+    if (!formatter)
+        return;
+
+    QPlainTextEdit *edit = formatter->plainTextEdit();
+    QScrollBar *scroll = edit->verticalScrollBar();
+    bool isAtBottom =  scroll && scroll->value() == scroll->maximum();
+
+    QString msg = str + "\n";
+    formatter->appendMessage(msg, format);
+
+    if (isAtBottom)
+        scroll->setValue(scroll->maximum());
+}
+}
+
+using namespace ProjectExplorer;
+
+namespace QmlDesigner {
+AssetExportDialog::AssetExportDialog(const Utils::FilePath &exportPath,
+                                     AssetExporter &assetExporter, FilePathModel &model,
+                                     QWidget *parent) :
+    QDialog(parent),
+    m_assetExporter(assetExporter),
+    m_filePathModel(model),
+    m_ui(new Ui::AssetExportDialog),
+    m_filesView(new QListView),
+    m_exportLogs(new QPlainTextEdit),
+    m_outputFormatter(new Utils::OutputFormatter())
+{
+    m_ui->setupUi(this);
+
+    m_ui->exportPath->setFileName(exportPath);
+    m_ui->exportPath->setPromptDialogTitle(tr("Choose Export Path"));
+    m_ui->exportPath->lineEdit()->setReadOnly(true);
+    m_ui->exportPath->addButton(tr("Open"), this, [this]() {
+        Core::FileUtils::showInGraphicalShell(Core::ICore::mainWindow(), m_ui->exportPath->path());
+    });
+
+    m_ui->buttonBox->button(QDialogButtonBox::Cancel)->setEnabled(false);
+
+    m_ui->stackedWidget->addWidget(m_filesView);
+    m_filesView->setModel(&m_filePathModel);
+
+    m_exportLogs->setReadOnly(true);
+    m_outputFormatter->setPlainTextEdit(m_exportLogs);
+    m_ui->stackedWidget->addWidget(m_exportLogs);
+    switchView(false);
+
+    connect(m_ui->buttonBox->button(QDialogButtonBox::Cancel), &QPushButton::clicked, [this]() {
+        m_assetExporter.cancel();
+    });
+
+    m_exportBtn = m_ui->buttonBox->addButton(tr("Export"), QDialogButtonBox::AcceptRole);
+    m_exportBtn->setEnabled(false);
+    connect(m_exportBtn, &QPushButton::clicked, this, &AssetExportDialog::onExport);
+    connect(&m_filePathModel, &FilePathModel::modelReset, this, [this]() {
+        m_ui->exportProgress->setRange(0, 1000);
+        m_ui->exportProgress->setValue(0);
+        m_exportBtn->setEnabled(true);
+    });
+
+    connect(m_ui->buttonBox->button(QDialogButtonBox::Close), &QPushButton::clicked, [this]() {
+        close();
+    });
+    m_ui->buttonBox->button(QDialogButtonBox::Close)->setVisible(false);
+
+    connect(&m_assetExporter, &AssetExporter::stateChanged,
+            this, &AssetExportDialog::onExportStateChanged);
+    connect(&m_assetExporter, &AssetExporter::exportProgressChanged,
+            this, &AssetExportDialog::updateExportProgress);
+
+    connect(TaskHub::instance(), &TaskHub::taskAdded, this, &AssetExportDialog::onTaskAdded);
+
+    m_ui->exportProgress->setRange(0,0);
+}
+
+AssetExportDialog::~AssetExportDialog()
+{
+    m_assetExporter.cancel();
+}
+
+void AssetExportDialog::onExport()
+{
+    switchView(true);
+
+    updateExportProgress(0.0);
+    TaskHub::clearTasks(Constants::TASK_CATEGORY_ASSET_EXPORT);
+    m_exportLogs->clear();
+
+    m_assetExporter.exportQml(m_filePathModel.files(), m_ui->exportPath->fileName());
+}
+
+void AssetExportDialog::onExportStateChanged(AssetExporter::ParsingState newState)
+{
+    switch (newState) {
+    case AssetExporter::ParsingState::ExportingDone:
+        m_exportBtn->setVisible(false);
+        m_ui->buttonBox->button(QDialogButtonBox::Close)->setVisible(true);
+        break;
+    default:
+        break;
+    }
+
+    m_exportBtn->setEnabled(newState == AssetExporter::ParsingState::ExportingDone);
+    m_ui->buttonBox->button(QDialogButtonBox::Cancel)->setEnabled(m_assetExporter.isBusy());
+}
+
+void AssetExportDialog::updateExportProgress(double value)
+{
+    value = std::max(0.0, std::min(1.0, value));
+    m_ui->exportProgress->setValue(std::round(value * 1000));
+}
+
+void AssetExportDialog::switchView(bool showExportView)
+{
+    if (showExportView)
+        m_ui->stackedWidget->setCurrentWidget(m_exportLogs);
+    else
+        m_ui->stackedWidget->setCurrentWidget(m_filesView);
+}
+
+void AssetExportDialog::onTaskAdded(const ProjectExplorer::Task &task)
+{
+    Utils::OutputFormat format = Utils::NormalMessageFormat;
+    if (task.category == Constants::TASK_CATEGORY_ASSET_EXPORT) {
+        switch (task.type) {
+        case ProjectExplorer::Task::Error:
+            format = Utils::StdErrFormat;
+            break;
+        case ProjectExplorer::Task::Warning:
+            format = Utils::StdOutFormat;
+            break;
+        default:
+            format = Utils::NormalMessageFormat;
+        }
+        addFormattedMessage(m_outputFormatter, task.description(), format);
+    }
+}
+
+}

src/plugins/qmldesigner/assetexporterplugin/assetexportdialog.h

@@ -0,0 +1,82 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#pragma once
+#include "assetexporter.h"
+
+#include <QDialog>
+#include <QStringListModel>
+
+#include "utils/fileutils.h"
+
+#include <memory>
+
+QT_BEGIN_NAMESPACE
+class QPushButton;
+class QListView;
+class QPlainTextEdit;
+QT_END_NAMESPACE
+
+namespace Ui {
+class AssetExportDialog;
+}
+
+namespace Utils {
+class OutputFormatter;
+}
+
+namespace ProjectExplorer {
+class Task;
+}
+
+namespace QmlDesigner {
+class FilePathModel;
+
+class AssetExportDialog : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit AssetExportDialog(const Utils::FilePath &exportPath, AssetExporter &assetExporter,
+                               FilePathModel& model, QWidget *parent = nullptr);
+    ~AssetExportDialog();
+
+private:
+    void onExport();
+    void onExportStateChanged(AssetExporter::ParsingState newState);
+    void updateExportProgress(double value);
+    void switchView(bool showExportView);
+    void onTaskAdded(const ProjectExplorer::Task &task);
+
+private:
+    AssetExporter &m_assetExporter;
+    FilePathModel &m_filePathModel;
+    std::unique_ptr<Ui::AssetExportDialog> m_ui;
+    QPushButton *m_exportBtn = nullptr;
+    QListView *m_filesView = nullptr;
+    QPlainTextEdit *m_exportLogs = nullptr;
+    Utils::OutputFormatter *m_outputFormatter = nullptr;
+};
+
+}

src/plugins/qmldesigner/assetexporterplugin/assetexportdialog.ui

@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>AssetExportDialog</class>
+ <widget class="QDialog" name="AssetExportDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>768</width>
+    <height>480</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Export QML</string>
+  </property>
+  <layout class="QGridLayout" name="gridLayout">
+   <item row="0" column="1">
+    <widget class="Utils::PathChooser" name="exportPath" native="true"/>
+   </item>
+   <item row="0" column="0">
+    <widget class="QLabel" name="label">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Maximum" vsizetype="Preferred">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="text">
+      <string>Export path:</string>
+     </property>
+    </widget>
+   </item>
+   <item row="1" column="0" colspan="2">
+    <widget class="QStackedWidget" name="stackedWidget"/>
+   </item>
+   <item row="2" column="0" colspan="2">
+    <widget class="QProgressBar" name="exportProgress">
+     <property name="maximum">
+      <number>1000</number>
+     </property>
+     <property name="value">
+      <number>0</number>
+     </property>
+    </widget>
+   </item>
+   <item row="3" column="0" colspan="2">
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Close</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>Utils::PathChooser</class>
+   <extends>QWidget</extends>
+   <header location="global">utils/pathchooser.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections/>
+</ui>

src/plugins/qmldesigner/assetexporterplugin/assetexporter.cpp

@@ -0,0 +1,370 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#include "assetexporter.h"
+#include "componentexporter.h"
+#include "exportnotification.h"
+#include "assetexportpluginconstants.h"
+
+#include "rewriterview.h"
+#include "qmlitemnode.h"
+#include "qmlobjectnode.h"
+#include "utils/qtcassert.h"
+#include "utils/runextensions.h"
+#include "variantproperty.h"
+
+#include <QCryptographicHash>
+#include <QDir>
+#include <QJsonArray>
+#include <QJsonDocument>
+#include <QLoggingCategory>
+#include <QWaitCondition>
+
+#include <random>
+#include <queue>
+
+using namespace ProjectExplorer;
+using namespace std;
+namespace {
+bool makeParentPath(const Utils::FilePath &path)
+{
+    QDir d;
+    return d.mkpath(path.toFileInfo().absolutePath());
+}
+
+QByteArray generateHash(const QString &token) {
+    static uint counter = 0;
+    std::mt19937 gen(std::random_device().operator()());
+    std::uniform_int_distribution<> distribution(1, 99999);
+    QByteArray data = QString("%1%2%3").arg(token).arg(++counter).arg(distribution(gen)).toLatin1();
+    return QCryptographicHash::hash(data, QCryptographicHash::Md5).toHex();
+}
+
+Q_LOGGING_CATEGORY(loggerInfo, "qtc.designer.assetExportPlugin.assetExporter", QtInfoMsg)
+Q_LOGGING_CATEGORY(loggerWarn, "qtc.designer.assetExportPlugin.assetExporter", QtWarningMsg)
+Q_LOGGING_CATEGORY(loggerError, "qtc.designer.assetExportPlugin.assetExporter", QtCriticalMsg)
+}
+
+namespace QmlDesigner {
+
+class AssetDumper
+{
+public:
+    AssetDumper();
+    ~AssetDumper();
+
+    void dumpAsset(const QPixmap &p, const Utils::FilePath &path);
+
+    /* Keeps on dumping until all assets are dumped, then quits */
+    void quitDumper();
+
+    /* Aborts dumping */
+    void abortDumper();
+
+private:
+    void addAsset(const QPixmap &p, const Utils::FilePath &path);
+    void doDumping(QFutureInterface<void> &fi);
+    void savePixmap(const QPixmap &p, Utils::FilePath &path) const;
+
+    QFuture<void> m_dumpFuture;
+    QMutex m_queueMutex;
+    QWaitCondition m_queueCondition;
+    std::queue<std::pair<QPixmap, Utils::FilePath>> m_assets;
+    std::atomic<bool> m_quitDumper;
+};
+
+
+
+AssetExporter::AssetExporter(AssetExporterView *view, ProjectExplorer::Project *project, QObject *parent) :
+    QObject(parent),
+    m_currentState(*this),
+    m_project(project),
+    m_view(view)
+{
+    connect(m_view, &AssetExporterView::loadingFinished, this, &AssetExporter::onQmlFileLoaded);
+    connect(m_view, &AssetExporterView::loadingError, this, &AssetExporter::notifyLoadError);
+}
+
+AssetExporter::~AssetExporter()
+{
+    cancel();
+}
+
+void AssetExporter::exportQml(const Utils::FilePaths &qmlFiles, const Utils::FilePath &exportPath,
+                              bool exportAssets)
+{
+    ExportNotification::addInfo(tr("Exporting metadata at %1. Export assets: ")
+                                .arg(exportPath.toUserOutput())
+                                .arg(exportAssets? tr("Yes") : tr("No")));
+    // TODO Asset export
+    notifyProgress(0.0);
+    Q_UNUSED(exportAssets);
+    m_exportFiles = qmlFiles;
+    m_components = QJsonArray();
+    m_exportPath = exportPath;
+    m_currentState.change(ParsingState::Parsing);
+    triggerLoadNextFile();
+    m_assetDumper = make_unique<AssetDumper>();
+}
+
+void AssetExporter::cancel()
+{
+    // TODO Cancel export
+    m_assetDumper.reset();
+}
+
+bool AssetExporter::isBusy() const
+{
+    return m_currentState == AssetExporter::ParsingState::Parsing ||
+            m_currentState == AssetExporter::ParsingState::ExportingAssets ||
+            m_currentState == AssetExporter::ParsingState::WritingJson;
+}
+
+Utils::FilePath AssetExporter::exportAsset(const QmlObjectNode &node)
+{
+    // TODO: Use this hash as UUID and add to the node.
+    QByteArray hash = addNodeUUID(node.modelNode());
+    Utils::FilePath assetPath = m_exportPath.pathAppended(QString("assets/%1.png")
+                                                          .arg(QString::fromLatin1(hash)));
+    m_assetDumper->dumpAsset(node.toQmlItemNode().instanceRenderPixmap(), assetPath);
+    return assetPath;
+}
+
+void AssetExporter::exportComponent(const ModelNode &rootNode)
+{
+    qCDebug(loggerInfo) << "Exporting component" << rootNode.id();
+    Component exporter(*this, rootNode);
+    exporter.exportComponent();
+    m_components.append(exporter.json());
+}
+
+void AssetExporter::notifyLoadError(AssetExporterView::LoadState state)
+{
+    QString errorStr = tr("Unknown error.");
+    switch (state) {
+    case AssetExporterView::LoadState::Exausted:
+        errorStr = tr("Loading file is taking too long.");
+        break;
+    case AssetExporterView::LoadState::QmlErrorState:
+        errorStr = tr("Cannot parse. QML file has errors.");
+        break;
+    default:
+        return;
+    }
+    qCDebug(loggerError) << "QML load error:" << errorStr;
+    ExportNotification::addError(tr("Loading QML failed. %1").arg(errorStr));
+}
+
+void AssetExporter::notifyProgress(double value) const
+{
+    emit exportProgressChanged(value);
+}
+
+void AssetExporter::onQmlFileLoaded()
+{
+    QTC_ASSERT(m_view && m_view->model(), qCDebug(loggerError) << "Null model"; return);
+    qCDebug(loggerInfo) << "Qml file load done" << m_view->model()->fileUrl();
+    exportComponent(m_view->rootModelNode());
+    QString error;
+    if (!m_view->saveQmlFile(&error)) {
+        ExportNotification::addError(tr("Error saving QML file. %1")
+                                     .arg(error.isEmpty()? tr("Unknown") : error));
+    }
+    triggerLoadNextFile();
+}
+
+QByteArray AssetExporter::addNodeUUID(ModelNode node)
+{
+    QByteArray uuid = node.auxiliaryData(Constants::UuidTag).toByteArray();
+    qDebug() << node.id() << "UUID" << uuid;
+    if (uuid.isEmpty()) {
+        // Assign a new hash.
+        do {
+            uuid = generateHash(node.id());
+        } while (m_usedHashes.contains(uuid));
+        m_usedHashes.insert(uuid);
+        node.setAuxiliaryData(Constants::UuidAuxTag, QString::fromLatin1(uuid));
+        node.model()->rewriterView()->writeAuxiliaryData();
+    }
+    return uuid;
+}
+
+void AssetExporter::triggerLoadNextFile()
+{
+    QTimer::singleShot(0, this, &AssetExporter::loadNextFile);
+}
+
+void AssetExporter::loadNextFile()
+{
+    if (m_exportFiles.isEmpty()) {
+        notifyProgress(0.8);
+        m_currentState.change(ParsingState::ParsingFinished);
+        writeMetadata();
+        return;
+    }
+
+    // Load the next pending file.
+    const Utils::FilePath file = m_exportFiles.takeFirst();
+    ExportNotification::addInfo(tr("Exporting file %1.").arg(file.toUserOutput()));
+    qCDebug(loggerInfo) << "Loading next file" << file;
+    m_view->loadQmlFile(file);
+}
+
+void AssetExporter::writeMetadata() const
+{
+    Utils::FilePath metadataPath = m_exportPath.pathAppended(m_exportPath.fileName() + ".metadata");
+    ExportNotification::addInfo(tr("Writing metadata to file %1.").
+                                arg(metadataPath.toUserOutput()));
+    makeParentPath(metadataPath);
+    m_currentState.change(ParsingState::WritingJson);
+    QJsonObject jsonRoot; // TODO: Write plugin info to root
+    jsonRoot.insert("artboards", m_components);
+    QJsonDocument doc(jsonRoot);
+    if (doc.isNull() || doc.isEmpty()) {
+        ExportNotification::addError(tr("Empty JSON document."));
+    } else {
+        Utils::FileSaver saver(metadataPath.toString(), QIODevice::Text);
+        saver.write(doc.toJson(QJsonDocument::Indented));
+        if (!saver.finalize()) {
+            ExportNotification::addError(tr("Writing metadata failed. %1").
+                                         arg(saver.errorString()));
+        }
+    }
+    notifyProgress(1.0);
+    ExportNotification::addInfo(tr("Export finished."));
+    m_assetDumper->quitDumper();
+    m_currentState.change(ParsingState::ExportingDone);
+}
+
+AssetExporter::State::State(AssetExporter &exporter) :
+    m_assetExporter(exporter)
+{
+
+}
+
+void AssetExporter::State::change(const ParsingState &state)
+{
+    qCDebug(loggerInfo()) << "Assetimporter State change: Old: " << m_state << "New: " << state;
+    if (m_state != state) {
+        m_state = state;
+        m_assetExporter.stateChanged(m_state);
+    }
+}
+
+QDebug operator<<(QDebug os, const AssetExporter::ParsingState &s)
+{
+    os << static_cast<std::underlying_type<QmlDesigner::AssetExporter::ParsingState>::type>(s);
+    return os;
+}
+
+AssetDumper::AssetDumper():
+    m_quitDumper(false)
+{
+    m_dumpFuture = Utils::runAsync(&AssetDumper::doDumping, this);
+}
+
+AssetDumper::~AssetDumper()
+{
+    abortDumper();
+}
+
+void AssetDumper::dumpAsset(const QPixmap &p, const Utils::FilePath &path)
+{
+    addAsset(p, path);
+}
+
+void AssetDumper::quitDumper()
+{
+    m_quitDumper = true;
+    m_queueCondition.wakeAll();
+    if (!m_dumpFuture.isFinished())
+        m_dumpFuture.waitForFinished();
+}
+
+void AssetDumper::abortDumper()
+{
+    if (!m_dumpFuture.isFinished()) {
+        m_dumpFuture.cancel();
+        m_queueCondition.wakeAll();
+        m_dumpFuture.waitForFinished();
+    }
+}
+
+void AssetDumper::addAsset(const QPixmap &p, const Utils::FilePath &path)
+{
+    QMutexLocker locker(&m_queueMutex);
+    qDebug() << "Save Asset:" << path;
+    m_assets.push({p, path});
+}
+
+void AssetDumper::doDumping(QFutureInterface<void> &fi)
+{
+    auto haveAsset = [this] (std::pair<QPixmap, Utils::FilePath> *asset) {
+        QMutexLocker locker(&m_queueMutex);
+        if (m_assets.empty())
+            return false;
+        *asset = m_assets.front();
+        m_assets.pop();
+        return true;
+    };
+
+    forever {
+        std::pair<QPixmap, Utils::FilePath> asset;
+        if (haveAsset(&asset)) {
+            if (fi.isCanceled())
+                break;
+            savePixmap(asset.first, asset.second);
+        } else {
+            if (m_quitDumper)
+                break;
+            QMutexLocker locker(&m_queueMutex);
+            m_queueCondition.wait(&m_queueMutex);
+        }
+
+        if (fi.isCanceled())
+            break;
+    }
+    fi.reportFinished();
+}
+
+void AssetDumper::savePixmap(const QPixmap &p, Utils::FilePath &path) const
+{
+    if (p.isNull()) {
+        qCDebug(loggerWarn) << "Dumping null pixmap" << path;
+        return;
+    }
+
+    if (!makeParentPath(path)) {
+        ExportNotification::addError(AssetExporter::tr("Error creating asset directory. %1")
+                                     .arg(path.fileName()));
+        return;
+    }
+
+    if (!p.save(path.toString())) {
+        ExportNotification::addError(AssetExporter::tr("Error saving asset. %1")
+                                     .arg(path.fileName()));
+    }
+}
+
+}

src/plugins/qmldesigner/assetexporterplugin/assetexporter.h

@@ -0,0 +1,111 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#pragma once
+
+#include "assetexporterview.h"
+#include "utils/fileutils.h"
+
+#include <QJsonArray>
+#include <QJsonObject>
+#include <QSet>
+
+#include <memory>
+
+QT_BEGIN_NAMESPACE
+class QJsonArray;
+QT_END_NAMESPACE
+
+namespace ProjectExplorer {
+class Project;
+}
+
+namespace QmlDesigner {
+class AssetDumper;
+
+class AssetExporter : public QObject
+{
+    Q_OBJECT
+
+public:
+
+    enum class ParsingState {
+        Idle = 0,
+        Parsing,
+        ParsingFinished,
+        ExportingAssets,
+        ExportingAssetsFinished,
+        WritingJson,
+        ExportingDone
+    };
+
+    AssetExporter(AssetExporterView *view, ProjectExplorer::Project *project,
+                  QObject *parent = nullptr);
+    ~AssetExporter();
+
+    void exportQml(const Utils::FilePaths &qmlFiles, const Utils::FilePath &exportPath,
+                   bool exportAssets = false);
+
+    void cancel();
+    bool isBusy() const;
+
+    Utils::FilePath exportAsset(const QmlObjectNode& node);
+
+signals:
+    void stateChanged(ParsingState);
+    void exportProgressChanged(double) const;
+
+private:
+    ParsingState currentState() const { return m_currentState.m_state; }
+    void exportComponent(const ModelNode &rootNode);
+    void writeMetadata() const;
+    void notifyLoadError(AssetExporterView::LoadState state);
+    void notifyProgress(double value) const;
+    void triggerLoadNextFile();
+    void loadNextFile();
+
+    void onQmlFileLoaded();
+
+    QByteArray addNodeUUID(ModelNode node);
+
+private:
+    mutable class State {
+    public:
+        State(AssetExporter&);
+        void change(const ParsingState &state);
+        operator ParsingState() const { return m_state; }
+        AssetExporter &m_assetExporter;
+        ParsingState m_state = ParsingState::Idle;
+    } m_currentState;
+    ProjectExplorer::Project *m_project = nullptr;
+    AssetExporterView *m_view = nullptr;
+    Utils::FilePaths m_exportFiles;
+    Utils::FilePath m_exportPath;
+    QJsonArray m_components;
+    QSet<QByteArray> m_usedHashes;
+    std::unique_ptr<AssetDumper> m_assetDumper;
+};
+QDebug operator<< (QDebug os, const QmlDesigner::AssetExporter::ParsingState& s);
+
+} // namespace QmlDesigner

src/plugins/qmldesigner/assetexporterplugin/assetexporterplugin.cpp

@@ -0,0 +1,130 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "assetexporterplugin.h"
+
+#include "assetexportpluginconstants.h"
+#include "assetexportdialog.h"
+#include "assetexporter.h"
+#include "assetexporterview.h"
+#include "filepathmodel.h"
+#include "componentexporter.h"
+
+#include "parsers/modelitemnodeparser.h"
+#include "parsers/textnodeparser.h"
+#include "parsers/assetnodeparser.h"
+
+#include "coreplugin/actionmanager/actionmanager.h"
+#include "coreplugin/actionmanager/actioncontainer.h"
+#include "coreplugin/documentmanager.h"
+#include "qmldesigner/qmldesignerplugin.h"
+#include "projectexplorer/projectexplorerconstants.h"
+#include "projectexplorer/session.h"
+#include "projectexplorer/project.h"
+#include "projectexplorer/session.h"
+#include "projectexplorer/taskhub.h"
+
+#include "extensionsystem/pluginmanager.h"
+#include "extensionsystem/pluginspec.h"
+
+#include "utils/algorithm.h"
+
+#include <QCoreApplication>
+#include <QAction>
+
+#include <QLoggingCategory>
+
+namespace QmlDesigner {
+
+AssetExporterPlugin::AssetExporterPlugin() :
+    m_view(new AssetExporterView)
+{
+    ProjectExplorer::TaskHub::addCategory( Constants::TASK_CATEGORY_ASSET_EXPORT,
+                                           tr("Asset Export"), false);
+
+    auto *designerPlugin = QmlDesigner::QmlDesignerPlugin::instance();
+    auto &viewManager = designerPlugin->viewManager();
+    viewManager.registerViewTakingOwnership(m_view);
+
+    // Add parsers templates for factory instantiation.
+    Component::addNodeParser<ItemNodeParser>();
+    Component::addNodeParser<TextNodeParser>();
+    Component::addNodeParser<AssetNodeParser>();
+
+    // Instantiate actions created by the plugin.
+    addActions();
+
+    connect(ProjectExplorer::SessionManager::instance(),
+            &ProjectExplorer::SessionManager::startupProjectChanged,
+            this, &AssetExporterPlugin::updateActions);
+
+    updateActions();
+}
+
+QString AssetExporterPlugin::pluginName() const
+{
+    return QLatin1String("AssetExporterPlugin");
+}
+
+void AssetExporterPlugin::onExport()
+{
+    auto startupProject = ProjectExplorer::SessionManager::startupProject();
+    if (!startupProject)
+        return;
+
+    FilePathModel model(startupProject);
+    QString exportDirName = startupProject->displayName() + "_export";
+    auto exportDir = startupProject->projectFilePath().parentDir().pathAppended(exportDirName);
+    AssetExporter assetExporter(m_view, startupProject);
+    AssetExportDialog assetExporterDialog(exportDir, assetExporter, model);
+    assetExporterDialog.exec();
+}
+
+void AssetExporterPlugin::addActions()
+{
+    auto exportAction = new QAction(tr("Export QML"));
+    exportAction->setToolTip(tr("Export QML code of the current project."));
+    connect(exportAction, &QAction::triggered, this, &AssetExporterPlugin::onExport);
+    Core::Command *cmd = Core::ActionManager::registerAction(exportAction, Constants::EXPORT_QML);
+
+    // Add action to build menu
+    Core::ActionContainer *buildMenu =
+            Core::ActionManager::actionContainer(ProjectExplorer::Constants::M_BUILDPROJECT);
+    buildMenu->addAction(cmd, ProjectExplorer::Constants::G_BUILD_RUN);
+}
+
+void AssetExporterPlugin::updateActions()
+{
+    auto project = ProjectExplorer::SessionManager::startupProject();
+    QAction* const exportAction = Core::ActionManager::command(Constants::EXPORT_QML)->action();
+    exportAction->setEnabled(project && !project->needsConfiguration());
+}
+
+QString AssetExporterPlugin::metaInfo() const
+{
+    return QLatin1String(":/assetexporterplugin/assetexporterplugin.metainfo");
+}
+
+} //QmlDesigner

src/plugins/qmldesigner/assetexporterplugin/assetexporterplugin.h

@@ -0,0 +1,56 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#pragma once
+
+#include <iwidgetplugin.h>
+
+
+namespace QmlDesigner {
+class AssetExporter;
+class AssetExporterView;
+class AssetExporterPlugin : public QObject, QmlDesigner::IWidgetPlugin
+{
+    Q_OBJECT
+
+    Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QmlDesignerPlugin" FILE "assetexporterplugin.json")
+
+    Q_DISABLE_COPY(AssetExporterPlugin)
+    Q_INTERFACES(QmlDesigner::IWidgetPlugin)
+
+public:
+    AssetExporterPlugin();
+
+    QString metaInfo() const;
+    QString pluginName() const;
+
+private:
+    void onExport();
+    void addActions();
+    void updateActions();
+
+    AssetExporterView *m_view = nullptr;
+};
+
+} // namespace QmlDesigner

src/plugins/qmldesigner/assetexporterplugin/assetexporterplugin.json

@@ -0,0 +1,6 @@
+{
+    "Vendor" : "The Qt Company Ltd",
+    "Category" : "Qt Quick",
+    "Description" : "Plugin for exporting assets and QML from QmlDesigner",
+    "Url" : "http://www.qt.io"
+}

src/plugins/qmldesigner/assetexporterplugin/assetexporterplugin.metainfo

@@ -0,0 +1,2 @@
+MetaInfo {
+}

src/plugins/qmldesigner/assetexporterplugin/assetexporterplugin.pri

@@ -0,0 +1,37 @@
+QT *= qml quick core widgets
+
+VPATH += $$PWD
+
+RESOURCES += assetexporterplugin.qrc
+
+INCLUDEPATH += ./
+
+HEADERS += \
+    assetexportdialog.h \
+    assetexporter.h \
+    assetexporterplugin.h \
+    assetexporterview.h \
+    assetexportpluginconstants.h \
+    componentexporter.h \
+    exportnotification.h \
+    filepathmodel.h \
+    parsers/assetnodeparser.h \
+    parsers/modelitemnodeparser.h \
+    parsers/modelnodeparser.h \
+    parsers/textnodeparser.h
+
+SOURCES += \
+    assetexportdialog.cpp \
+    assetexporter.cpp \
+    assetexporterplugin.cpp \
+    assetexporterview.cpp \
+    componentexporter.cpp \
+    exportnotification.cpp \
+    filepathmodel.cpp \
+    parsers/assetnodeparser.cpp \
+    parsers/modelitemnodeparser.cpp \
+    parsers/modelnodeparser.cpp \
+    parsers/textnodeparser.cpp
+
+FORMS += \
+    assetexportdialog.ui

src/plugins/qmldesigner/assetexporterplugin/assetexporterplugin.pro

@@ -0,0 +1,17 @@
+include (../../../../qtcreator.pri)
+include (../plugindestdir.pri)
+include (../designercore/iwidgetplugin.pri)
+include (../qmldesigner_dependencies.pri)
+include (assetexporterplugin.pri)
+
+LIBS += -L$$IDE_PLUGIN_PATH
+LIBS += -l$$qtLibraryName(QmlDesigner)
+LIBS += -l$$qtLibraryName(ExtensionSystem)
+LIBS += -l$$qtLibraryName(Core)
+LIBS += -l$$qtLibraryName(ProjectExplorer)
+LIBS += -l$$qtLibraryName(Utils)
+
+TARGET = assetexporterplugin
+TEMPLATE = lib
+CONFIG += plugin
+

src/plugins/qmldesigner/assetexporterplugin/assetexporterplugin.qbs

@@ -0,0 +1,59 @@
+import qbs
+
+QtcProduct {
+    name: "assetexporterplugin"
+    type: ["dynamiclibrary"]
+    installDir: qtc.ide_plugin_path + '/' + installDirName
+    property string installDirName: qbs.targetOS.contains("macos") ? "QmlDesigner" : "qmldesigner"
+
+    Depends { name: "Core" }
+    Depends { name: "ProjectExplorer" }
+    Depends { name: "QmlDesigner" }
+    Depends { name: "Utils" }
+
+    cpp.includePaths: base.concat([
+        "./",
+        "../designercore/include",
+        "../../../../share/qtcreator/qml/qmlpuppet/interfaces",
+        "../../../../share/qtcreator/qml/qmlpuppet/types"
+    ])
+
+    Properties {
+        condition: qbs.targetOS.contains("unix")
+        cpp.internalVersion: ""
+    }
+
+    Group {
+        name: "plugin metadata"
+        files: ["assetexporterplugin.json"]
+        fileTags: ["qt_plugin_metadata"]
+    }
+
+    files: [
+        "assetexportdialog.cpp",
+        "assetexportdialog.h",
+        "assetexportdialog.ui",
+        "assetexporter.cpp",
+        "assetexporter.h",
+        "assetexporterplugin.cpp",
+        "assetexporterplugin.h",
+        "assetexporterplugin.qrc",
+        "assetexporterview.cpp",
+        "assetexporterview.h",
+        "assetexportpluginconstants.h",
+        "componentexporter.cpp",
+        "componentexporter.h",
+        "exportnotification.cpp",
+        "exportnotification.h",
+        "filepathmodel.cpp",
+        "filepathmodel.h",
+        "parsers/assetnodeparser.cpp",
+        "parsers/assetnodeparser.h",
+        "parsers/modelitemnodeparser.cpp",
+        "parsers/modelitemnodeparser.h",
+        "parsers/modelnodeparser.cpp",
+        "parsers/modelnodeparser.h",
+        "parsers/textnodeparser.cpp",
+        "parsers/textnodeparser.h"
+    ]
+}

src/plugins/qmldesigner/assetexporterplugin/assetexporterplugin.qrc

@@ -0,0 +1,5 @@
+<RCC>
+    <qresource prefix="/assetexporterplugin">
+        <file>assetexporterplugin.metainfo</file>
+    </qresource>
+</RCC>

src/plugins/qmldesigner/assetexporterplugin/assetexporterview.cpp

@@ -0,0 +1,161 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#include "assetexporterview.h"
+
+#include "qmlitemnode.h"
+#include "rewriterview.h"
+
+#include "coreplugin/editormanager/editormanager.h"
+#include "coreplugin/editormanager/ieditor.h"
+#include "coreplugin/modemanager.h"
+#include "coreplugin/coreconstants.h"
+
+#include <QLoggingCategory>
+
+namespace  {
+Q_LOGGING_CATEGORY(loggerInfo, "qtc.designer.assetExportPlugin.view", QtInfoMsg)
+Q_LOGGING_CATEGORY(loggerWarn, "qtc.designer.assetExportPlugin.view", QtWarningMsg)
+Q_LOGGING_CATEGORY(loggerError, "qtc.designer.assetExportPlugin.view", QtCriticalMsg)
+
+static const int RetryIntervalMs = 500;
+static const int MinRetry = 2;
+}
+
+namespace QmlDesigner {
+
+AssetExporterView::AssetExporterView(QObject *parent) : AbstractView(parent),
+    m_timer(this)
+{
+    m_timer.setInterval(RetryIntervalMs);
+    // We periodically check if file is loaded.
+    connect(&m_timer, &QTimer::timeout, this, &AssetExporterView::handleTimerTimeout);
+}
+
+
+bool AssetExporterView::loadQmlFile(const Utils::FilePath &path, uint timeoutSecs)
+{
+    qCDebug(loggerInfo) << "Load file" << path;
+    if (loadingState() == LoadState::Busy)
+        return false;
+
+    setState(LoadState::Busy);
+    m_retryCount = std::max(MinRetry, static_cast<int>((timeoutSecs * 1000) / RetryIntervalMs));
+    m_currentEditor = Core::EditorManager::openEditor(path.toString(), Core::Id(),
+                                    Core::EditorManager::DoNotMakeVisible);
+    Core::ModeManager::activateMode(Core::Constants::MODE_DESIGN);
+    Core::ModeManager::setFocusToCurrentMode();
+    m_timer.start();
+    return true;
+}
+
+bool AssetExporterView::saveQmlFile(QString *error) const
+{
+    if (!m_currentEditor) {
+        qCDebug(loggerWarn) << "Saving QML file failed. No editor.";
+        return false;
+    }
+    return m_currentEditor->document()->save(error);
+}
+
+void AssetExporterView::modelAttached(Model *model)
+{
+    if (model->rewriterView() && model->rewriterView()->inErrorState())
+        setState(LoadState::QmlErrorState);
+
+    AbstractView::modelAttached(model);
+}
+
+void AssetExporterView::
+instanceInformationsChanged(const QMultiHash<ModelNode, InformationName> &informationChangeHash)
+{
+    if (inErrorState() || loadingState() == LoadState::Loaded)
+        return; // Already reached error or connected state.
+
+    // We expect correct dimensions are available if the rootnode's
+    // information change message is received.
+    const auto nodes = informationChangeHash.keys();
+    bool hasRootNode = std::any_of(nodes.begin(), nodes.end(), [](const ModelNode &n) {
+        return n.isRootNode();
+    });
+    if (hasRootNode)
+        handleMaybeDone();
+}
+
+void AssetExporterView::instancesPreviewImageChanged(const QVector<ModelNode> &nodeList)
+{
+    Q_UNUSED(nodeList);
+    emit previewChanged();
+}
+
+bool AssetExporterView::inErrorState() const
+{
+    return m_state == LoadState::Exausted || m_state == LoadState::QmlErrorState;
+}
+
+bool AssetExporterView::isLoaded() const
+{
+    return isAttached() && QmlItemNode(rootModelNode()).isValid();
+}
+
+void AssetExporterView::setState(AssetExporterView::LoadState state)
+{
+    if (state != m_state) {
+        m_state = state;
+        qCDebug(loggerInfo) << "Loading state changed" << m_state;
+        if (inErrorState() || m_state == LoadState::Loaded) {
+            m_timer.stop();
+            // TODO: Send the loaded signal with a delay. The assumption that model attached and a
+            // valid root object is enough to declare a QML file is ready is incorrect. A ideal
+            // solution would be that the puppet notifies file ready signal.
+            if (m_state == LoadState::Loaded)
+                QTimer::singleShot(2000, this, &AssetExporterView::loadingFinished);
+            else
+                emit loadingError(m_state);
+        }
+    }
+}
+
+void AssetExporterView::handleMaybeDone()
+{
+    if (isLoaded())
+        setState(LoadState::Loaded);
+}
+
+void AssetExporterView::handleTimerTimeout()
+{
+    if (!inErrorState() && loadingState() != LoadState::Loaded)
+        handleMaybeDone();
+
+    if (--m_retryCount < 0)
+        setState(LoadState::Exausted);
+}
+
+}
+
+QDebug operator<<(QDebug os, const QmlDesigner::AssetExporterView::LoadState &s)
+{
+    os << static_cast<std::underlying_type<QmlDesigner::AssetExporterView::LoadState>::type>(s);
+    return os;
+}

src/plugins/qmldesigner/assetexporterplugin/assetexporterview.h

@@ -0,0 +1,86 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#pragma once
+
+#include "abstractview.h"
+
+#include "utils/fileutils.h"
+
+#include <QObject>
+#include <QTimer>
+
+#include <memory>
+
+namespace Core {
+class IEditor;
+}
+namespace QmlDesigner {
+
+
+class AssetExporterView : public AbstractView
+{
+    Q_OBJECT
+public:
+    enum class LoadState {
+        Idle = 1,
+        Busy,
+        Exausted,
+        QmlErrorState,
+        Loaded
+    };
+
+    AssetExporterView(QObject *parent = nullptr);
+
+    bool loadQmlFile(const Utils::FilePath &path, uint timeoutSecs = 10);
+    bool saveQmlFile(QString *error) const;
+
+    void modelAttached(Model *model) override;
+    void instanceInformationsChanged(const QMultiHash<ModelNode, InformationName> &informationChangeHash) override;
+    void instancesPreviewImageChanged(const QVector<ModelNode> &nodeList) override;
+
+    LoadState loadingState() const { return m_state; }
+    bool inErrorState() const;
+
+signals:
+    void loadingFinished();
+    void loadingError(LoadState);
+    void previewChanged();
+
+private:
+    bool isLoaded() const;
+    void setState(LoadState state);
+    void handleMaybeDone();
+    void handleTimerTimeout();
+
+    Core::IEditor *m_currentEditor = nullptr;
+    QTimer m_timer;
+    int m_retryCount = 0;
+    LoadState m_state = LoadState::Idle;
+    bool m_waitForPuppet = false;
+};
+
+}
+
+QDebug operator<<(QDebug os, const QmlDesigner::AssetExporterView::LoadState &s);

src/plugins/qmldesigner/assetexporterplugin/assetexportpluginconstants.h

@@ -0,0 +1,78 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#pragma once
+
+namespace QmlDesigner {
+namespace Constants {
+
+const char EXPORT_QML[] = "Designer.ExportPlugin.ExportQml";
+
+const char TASK_CATEGORY_ASSET_EXPORT[] = "AssetExporter.Export";
+const char UuidAuxTag[] = "uuid";
+
+//***************************************************************************
+// Metadata tags
+//***************************************************************************
+// Plugin info tags
+const char PluginInfoTag[] = "pluginInfo";
+const char MetadataVersionTag[] = "metadataVersion";
+
+const char DocumentInfoTag[] = "documentInfo";
+const char DocumentNameTag[] = "name";
+
+// Layer data tags
+const char ArtboardListTag[] = "artboards";
+
+const char XPosTag[] = "x";
+const char YPosTag[] = "y";
+const char WidthTag[] = "width";
+const char HeightTag[] = "height";
+
+
+const char QmlIdTag[] = "qmlId";
+const char ExportTypeTag[] = "exportType";
+const char QmlPropertiesTag[] = "qmlProperties";
+const char ImportsTag[] = "extraImports";
+const char UuidTag[] = "uuid";
+const char ClipTag[] = "clip";
+const char AssetDataTag[] = "assetData";
+const char AssetPathTag[] = "assetPath";
+const char AssetBoundsTag[] = "assetBounds";
+const char OpacityTag[] = "opacity";
+
+const char TextDetailsTag[] = "textDetails";
+const char FontFamilyTag[] = "fontFamily";
+const char FontSizeTag[] = "fontSize";
+const char FontStyleTag[] = "fontStyle";
+const char LetterSpacingTag[] = "kerning";
+const char TextColorTag[] = "textColor";
+const char TextContentTag[] = "contents";
+const char IsMultilineTag[] = "multiline";
+const char LineHeightTag[] = "lineHeight";
+const char HAlignTag[] = "horizontalAlignment";
+const char VAlignTag[] = "verticalAlignment";
+
+}
+}

src/plugins/qmldesigner/assetexporterplugin/componentexporter.cpp

@@ -0,0 +1,119 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#include "componentexporter.h"
+#include "parsers/modelnodeparser.h"
+
+#include "model.h"
+#include "nodeabstractproperty.h"
+#include "rewriterview.h"
+
+#include "utils/qtcassert.h"
+
+#include <QJsonArray>
+#include <QJsonObject>
+#include <QLoggingCategory>
+
+namespace {
+Q_LOGGING_CATEGORY(loggerInfo, "qtc.designer.assetExportPlugin.modelExporter", QtInfoMsg)
+
+static void populateLineage(const QmlDesigner::ModelNode &node, QByteArrayList &lineage)
+{
+    if (!node.isValid() || node.type().isEmpty())
+        return;
+    lineage.append(node.type());
+    if (node.hasParentProperty())
+        populateLineage(node.parentProperty().parentModelNode(), lineage);
+}
+
+}
+
+namespace QmlDesigner {
+
+std::vector<std::unique_ptr<Internal::NodeParserCreatorBase>> Component::m_readers;
+Component::Component(AssetExporter &exporter, const ModelNode &rootNode):
+    m_exporter(exporter),
+    m_rootNode(rootNode)
+{
+
+}
+
+QJsonObject Component::json() const
+{
+    return m_json;
+}
+
+AssetExporter &Component::exporter()
+{
+    return m_exporter;
+}
+
+void Component::exportComponent()
+{
+    QTC_ASSERT(m_rootNode.isValid(), return);
+    m_json = nodeToJson(m_rootNode);
+}
+
+ModelNodeParser *Component::createNodeParser(const ModelNode &node) const
+{
+    QByteArrayList lineage;
+    populateLineage(node, lineage);
+    std::unique_ptr<ModelNodeParser> reader;
+    for (auto &parserCreator: m_readers) {
+        std::unique_ptr<ModelNodeParser> r(parserCreator->instance(lineage, node));
+        if (r->isExportable()) {
+            if (reader) {
+                if (reader->priority() < r->priority())
+                    reader = std::move(r);
+            } else {
+                reader = std::move(r);
+            }
+        }
+    }
+
+    if (!reader)
+        qCDebug(loggerInfo()) << "No parser for node" << node;
+
+    return reader.release();
+}
+
+QJsonObject Component::nodeToJson(const ModelNode &node)
+{
+    QJsonObject jsonObject;
+    std::unique_ptr<ModelNodeParser> parser(createNodeParser(node));
+    if (parser)
+        jsonObject = parser->json(*this);
+
+    QJsonArray children;
+    for (const ModelNode &childnode : node.directSubModelNodes())
+        children.append(nodeToJson(childnode));
+
+    if (!children.isEmpty())
+        jsonObject.insert("children", children);
+
+    return  jsonObject;
+}
+
+
+} // namespace QmlDesigner

src/plugins/qmldesigner/assetexporterplugin/componentexporter.h

@@ -0,0 +1,93 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#pragma once
+
+#include <QJsonObject>
+#include <QByteArrayList>
+
+#include <memory>
+
+#include "utils/qtcassert.h"
+
+QT_BEGIN_NAMESPACE
+class QJsonArray;
+QT_END_NAMESPACE
+
+namespace QmlDesigner {
+class AssetExporter;
+class ModelNode;
+class Component;
+class ModelNodeParser;
+
+namespace  Internal {
+class NodeParserCreatorBase
+{
+public:
+    virtual ~NodeParserCreatorBase() {}
+protected:
+    virtual ModelNodeParser *instance(const QByteArrayList &, const ModelNode &) const = 0;
+    friend class QmlDesigner::Component;
+};
+
+template<class T>
+class NodeParserCreator : public NodeParserCreatorBase
+{
+public:
+    NodeParserCreator() = default;
+    ~NodeParserCreator() = default;
+
+protected:
+    ModelNodeParser *instance(const QByteArrayList &lineage, const ModelNode &node) const {
+        return new T(lineage, node);
+    }
+};
+} //Internal
+
+class Component
+{
+public:
+    Component(AssetExporter& exporter, const ModelNode &rootNode);
+
+    void exportComponent();
+    QJsonObject json() const;
+
+    AssetExporter &exporter();
+
+    template<typename T> static void addNodeParser()
+    {
+        QTC_ASSERT((std::is_base_of<ModelNodeParser, T>::value), return);
+        m_readers.push_back(std::make_unique<Internal::NodeParserCreator<T>>());
+    }
+private:
+    ModelNodeParser* createNodeParser(const ModelNode &node) const;
+    QJsonObject nodeToJson(const ModelNode &node);
+
+private:
+    AssetExporter& m_exporter;
+    const ModelNode &m_rootNode;
+    QJsonObject m_json;
+    static std::vector<std::unique_ptr<Internal::NodeParserCreatorBase>> m_readers;
+};
+}

src/plugins/qmldesigner/assetexporterplugin/exportnotification.cpp

@@ -0,0 +1,58 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd
+** All rights reserved.
+** For any questions to The Qt Company, please use contact form at http://www.qt.io/contact-us
+**
+** This file is part of the Qt Asset Importer module.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** If you have questions regarding the use of this file, please use
+** contact form at http://www.qt.io/contact-us
+**
+******************************************************************************/
+#include "exportnotification.h"
+#include "assetexportpluginconstants.h"
+
+#include "projectexplorer/taskhub.h"
+
+#include <QLoggingCategory>
+
+namespace  {
+Q_LOGGING_CATEGORY(loggerDebug, "qtc.designer.assetExportPlugin.exportNotification", QtDebugMsg)
+}
+
+using namespace ProjectExplorer;
+namespace  {
+static void addTask(Task::TaskType type, const QString &desc)
+{
+    qCDebug(loggerDebug) << desc;
+    Task task(type, desc, {}, -1, QmlDesigner::Constants::TASK_CATEGORY_ASSET_EXPORT);
+    TaskHub::addTask(task);
+}
+}
+
+namespace QmlDesigner {
+
+void ExportNotification::addError(const QString &errMsg)
+{
+    addTask(Task::Error, errMsg);
+}
+
+void ExportNotification::addWarning(const QString &warningMsg)
+{
+    addTask(Task::Warning, warningMsg);
+}
+
+void ExportNotification::addInfo(const QString &infoMsg)
+{
+    addTask(Task::Unknown, infoMsg);
+}
+} // QmlDesigner

src/plugins/qmldesigner/assetexporterplugin/exportnotification.h

@@ -0,0 +1,33 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd
+** All rights reserved.
+** For any questions to The Qt Company, please use contact form at http://www.qt.io/contact-us
+**
+** This file is part of the Qt Asset Importer module.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** If you have questions regarding the use of this file, please use
+** contact form at http://www.qt.io/contact-us
+**
+******************************************************************************/
+#pragma once
+
+#include <QString>
+
+namespace QmlDesigner {
+class ExportNotification
+{
+public:
+    static void addError(const QString &errMsg);
+    static void addWarning(const QString &warningMsg);
+    static void addInfo(const QString &infoMsg);
+};
+} // QmlDesigner

src/plugins/qmldesigner/assetexporterplugin/filepathmodel.cpp

@@ -0,0 +1,163 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#include "filepathmodel.h"
+
+#include "exportnotification.h"
+
+#include "projectexplorer/project.h"
+#include "projectexplorer/projectnodes.h"
+#include "utils/runextensions.h"
+
+#include <QLoggingCategory>
+#include <QTimer>
+
+using namespace ProjectExplorer;
+
+namespace  {
+Q_LOGGING_CATEGORY(loggerError, "qtc.designer.assetExportPlugin.filePathModel", QtCriticalMsg)
+Q_LOGGING_CATEGORY(loggerInfo, "qtc.designer.assetExportPlugin.filePathModel", QtInfoMsg)
+
+void findQmlFiles(QFutureInterface<Utils::FilePath> &f, const Project *project)
+{
+    if (!project && !f.isCanceled())
+        f.reportFinished({});
+
+    int index = 0;
+    Utils::FilePaths qmlFiles = project->files([&f, &index](const Node* node) ->bool {
+        if (f.isCanceled())
+            return false;
+        Utils::FilePath path = node->filePath();
+        bool isComponent = !path.fileName().isEmpty() && path.fileName().front().isUpper();
+        if (isComponent && node->filePath().endsWith(".ui.qml"))
+            f.reportResult(path, index++);
+        return true;
+    });
+    f.reportFinished();
+}
+}
+
+namespace QmlDesigner {
+
+FilePathModel::FilePathModel(ProjectExplorer::Project *project, QObject *parent)
+    : QAbstractListModel(parent),
+      m_project(project)
+{
+    QTimer::singleShot(0, this, &FilePathModel::processProject);
+}
+
+FilePathModel::~FilePathModel()
+{
+    if (m_preprocessWatcher && !m_preprocessWatcher->isCanceled() &&
+            !m_preprocessWatcher->isFinished()) {
+        ExportNotification::addInfo(tr("Canceling QML files preparation."));
+        m_preprocessWatcher->cancel();
+        m_preprocessWatcher->waitForFinished();
+        qCDebug(loggerInfo) << "Canceling QML files preparation done.";
+    }
+}
+
+Qt::ItemFlags FilePathModel::flags(const QModelIndex &index) const
+{
+    Qt::ItemFlags itemFlags = QAbstractListModel::flags(index);
+    if (index.isValid())
+        itemFlags |= Qt::ItemIsUserCheckable;
+    return itemFlags;
+}
+
+int FilePathModel::rowCount(const QModelIndex &parent) const
+{
+    if (!parent.isValid())
+        return m_files.count();
+    return 0;
+}
+
+QVariant FilePathModel::data(const QModelIndex &index, int role) const
+{
+    if (!index.isValid())
+        return {};
+
+    switch (role) {
+    case Qt::DisplayRole:
+        return m_files[index.row()].toUserOutput();
+    case Qt::CheckStateRole:
+        return m_skipped.count(m_files[index.row()]) ? Qt::Unchecked : Qt::Checked;
+    default:
+        break;
+    }
+
+    return {};
+}
+
+bool FilePathModel::setData(const QModelIndex &index, const QVariant &value, int role)
+{
+    if (!index.isValid() || role != Qt::CheckStateRole)
+        return false;
+
+    const Utils::FilePath path = m_files[index.row()];
+    if (value == Qt::Checked)
+        m_skipped.erase(path);
+    else
+        m_skipped.insert(path);
+
+    emit dataChanged(index, index);
+    return true;
+}
+
+Utils::FilePaths FilePathModel::files() const
+{
+    Utils::FilePaths selectedPaths;
+    std::copy_if(m_files.begin(), m_files.end(), std::back_inserter(selectedPaths),
+                 [this](const Utils::FilePath &path) {
+        return !m_skipped.count(path);
+    });
+    return selectedPaths;
+}
+
+void FilePathModel::processProject()
+{
+    if (m_preprocessWatcher && !m_preprocessWatcher->isCanceled() &&
+            !m_preprocessWatcher->isFinished()) {
+        qCDebug(loggerError) << "Previous model load not finished.";
+        return;
+    }
+
+    beginResetModel();
+    m_preprocessWatcher.reset(new QFutureWatcher<Utils::FilePath>(this));
+    connect(m_preprocessWatcher.get(), &QFutureWatcher<Utils::FilePath>::resultReadyAt, this,
+            [this](int resultIndex) {
+        beginInsertRows(index(0, 0) , m_files.count(), m_files.count());
+        m_files.append(m_preprocessWatcher->resultAt(resultIndex));
+        endInsertRows();
+    });
+
+    connect(m_preprocessWatcher.get(), &QFutureWatcher<Utils::FilePath>::finished,
+            this, &FilePathModel::endResetModel);
+
+    QFuture<Utils::FilePath> f = Utils::runAsync(&findQmlFiles, m_project);
+    m_preprocessWatcher->setFuture(f);
+}
+
+
+}

src/plugins/qmldesigner/assetexporterplugin/filepathmodel.h

@@ -0,0 +1,60 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#pragma once
+#include <QAbstractListModel>
+#include <QFutureWatcher>
+
+#include "utils/fileutils.h"
+
+#include <memory>
+#include <unordered_set>
+
+namespace ProjectExplorer {
+class Project;
+}
+
+namespace QmlDesigner {
+class FilePathModel : public QAbstractListModel
+{
+public:
+    FilePathModel(ProjectExplorer::Project *project, QObject *parent = nullptr);
+    ~FilePathModel() override;
+
+    Qt::ItemFlags flags(const QModelIndex &index) const override;
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+    bool setData(const QModelIndex &index, const QVariant &value, int role) override;
+
+    Utils::FilePaths files() const;
+private:
+    void processProject();
+
+    ProjectExplorer::Project *m_project = nullptr;
+    std::unique_ptr<QFutureWatcher<Utils::FilePath>> m_preprocessWatcher;
+    std::unordered_set<Utils::FilePath> m_skipped;
+    Utils::FilePaths m_files;
+};
+
+}

src/plugins/qmldesigner/assetexporterplugin/parsers/assetnodeparser.cpp

@@ -0,0 +1,66 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "assetnodeparser.h"
+#include "assetexportpluginconstants.h"
+#include "assetexporter.h"
+
+#include "qmlitemnode.h"
+#include "componentexporter.h"
+
+#include "utils/fileutils.h"
+
+#include <QPixmap>
+
+namespace QmlDesigner {
+using namespace Constants;
+AssetNodeParser::AssetNodeParser(const QByteArrayList &lineage, const ModelNode &node) :
+    ItemNodeParser(lineage, node)
+{
+
+}
+
+bool AssetNodeParser::isExportable() const
+{
+    auto hasType =  [this](const QByteArray &type) {
+        return lineage().contains(type);
+    };
+    return hasType("QtQuick.Image") || hasType("QtQuick.Rectangle");
+}
+
+QJsonObject AssetNodeParser::json(Component &component) const
+{
+    QJsonObject jsonObject = ItemNodeParser::json(component);
+
+    QPixmap asset = objectNode().toQmlItemNode().instanceRenderPixmap();
+    Utils::FilePath assetPath = component.exporter().exportAsset(objectNode());
+
+    QJsonObject assetData;
+    assetData.insert(AssetPathTag, assetPath.toString());
+    jsonObject.insert(AssetDataTag, assetData);
+    return jsonObject;
+}
+}
+

src/plugins/qmldesigner/assetexporterplugin/parsers/assetnodeparser.h

@@ -0,0 +1,42 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#pragma once
+
+#include "modelitemnodeparser.h"
+
+namespace QmlDesigner {
+class Component;
+
+class AssetNodeParser : public ItemNodeParser
+{
+public:
+    AssetNodeParser(const QByteArrayList &lineage, const ModelNode &node);
+    ~AssetNodeParser() override = default;
+
+    bool isExportable() const override;
+    int priority() const override { return 200; }
+    QJsonObject json(Component &component) const override;
+};
+}

src/plugins/qmldesigner/assetexporterplugin/parsers/modelitemnodeparser.cpp

@@ -0,0 +1,65 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "modelitemnodeparser.h"
+#include "assetexportpluginconstants.h"
+
+#include "qmlitemnode.h"
+
+namespace QmlDesigner {
+using namespace Constants;
+ItemNodeParser::ItemNodeParser(const QByteArrayList &lineage,
+                               const ModelNode &node) :
+    ModelNodeParser(lineage, node)
+{
+
+}
+
+bool QmlDesigner::ItemNodeParser::isExportable() const
+{
+    return lineage().contains("QtQuick.Item");
+}
+
+QJsonObject QmlDesigner::ItemNodeParser::json(QmlDesigner::Component &component) const
+{
+    Q_UNUSED(component);
+    const QmlObjectNode &qmlObjectNode = objectNode();
+    QJsonObject jsonObject;
+    jsonObject.insert(QmlIdTag, qmlObjectNode.id());
+    QmlItemNode itemNode = qmlObjectNode.toQmlItemNode();
+
+    // Position relative to parent
+    QPointF pos = itemNode.instancePosition();
+    jsonObject.insert(XPosTag, pos.x());
+    jsonObject.insert(YPosTag, pos.y());
+
+    // size
+    QSizeF size = itemNode.instanceSize();
+    jsonObject.insert(WidthTag, size.width());
+    jsonObject.insert(HeightTag, size.height());
+
+    return  jsonObject;
+}
+}

src/plugins/qmldesigner/assetexporterplugin/parsers/modelitemnodeparser.h

@@ -0,0 +1,44 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#pragma once
+
+#include "modelnodeparser.h"
+
+namespace QmlDesigner {
+class ModelNode;
+class Component;
+
+class ItemNodeParser : public ModelNodeParser
+{
+public:
+    ItemNodeParser(const QByteArrayList &lineage, const ModelNode &node);
+
+    ~ItemNodeParser() override = default;
+
+    int priority() const override { return 100; }
+    bool isExportable() const override;
+    QJsonObject json(Component &component) const override;
+};
+}

src/plugins/qmldesigner/assetexporterplugin/parsers/modelnodeparser.cpp

@@ -0,0 +1,41 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#include "modelnodeparser.h"
+
+namespace QmlDesigner {
+ModelNodeParser::ModelNodeParser(const QByteArrayList &lineage, const ModelNode &node) :
+    m_node(node),
+    m_objectNode(node),
+    m_lineage(lineage)
+{
+
+}
+
+QVariant ModelNodeParser::propertyValue(const PropertyName &name) const
+{
+    return m_objectNode.instanceValue(name);
+}
+
+}

src/plugins/qmldesigner/assetexporterplugin/parsers/modelnodeparser.h

@@ -0,0 +1,58 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#pragma once
+
+#include "qmlobjectnode.h"
+
+#include <QJsonObject>
+#include <QByteArrayList>
+
+namespace QmlDesigner {
+class Component;
+class ModelNode;
+
+class ModelNodeParser
+{
+public:
+    ModelNodeParser(const QByteArrayList &lineage, const ModelNode &node);
+
+    virtual ~ModelNodeParser() = default;
+
+    virtual int priority() const = 0;
+    virtual bool isExportable() const = 0;
+    virtual QJsonObject json(Component& component) const = 0;
+
+    const QByteArrayList& lineage() const { return m_lineage; }
+    const QmlObjectNode& objectNode() const { return m_objectNode; }
+    QVariant propertyValue(const PropertyName &name) const;
+
+protected:
+    const ModelNode &m_node;
+
+private:
+    QmlObjectNode m_objectNode;
+    QByteArrayList m_lineage;
+};
+}

src/plugins/qmldesigner/assetexporterplugin/parsers/textnodeparser.cpp

@@ -0,0 +1,87 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "textnodeparser.h"
+#include "assetexportpluginconstants.h"
+
+#include <QColor>
+#include <QHash>
+
+namespace  {
+const QHash<QString, QString> AlignMapping{
+    {"AlignRight", "RIGHT"},
+    {"AlignHCenter", "CENTER"},
+    {"AlignJustify", "JUSTIFIED"},
+    {"AlignLeft", "LEFT"},
+    {"AlignTop", "TOP"},
+    {"AlignVCenter", "CENTER"},
+    {"AlignBottom", "BOTTOM"}
+};
+
+QString toJsonAlignEnum(QString value) {
+    if (value.isEmpty() || !AlignMapping.contains(value))
+        return "";
+    return AlignMapping[value];
+}
+}
+
+
+namespace QmlDesigner {
+using namespace Constants;
+TextNodeParser::TextNodeParser(const QByteArrayList &lineage, const ModelNode &node) :
+    ItemNodeParser(lineage, node)
+{
+
+}
+
+bool TextNodeParser::isExportable() const
+{
+    return lineage().contains("QtQuick.Text");
+}
+
+QJsonObject TextNodeParser::json(Component &component) const
+{
+    Q_UNUSED(component);
+    QJsonObject jsonObject = ItemNodeParser::json(component);
+
+    QJsonObject textDetails;
+    textDetails.insert(TextContentTag, propertyValue("text").toString());
+    textDetails.insert(FontFamilyTag, propertyValue("font.family").toString());
+    textDetails.insert(FontStyleTag, propertyValue("font.styleName").toString());
+    textDetails.insert(FontSizeTag, propertyValue("font.pixelSize").toInt());
+    textDetails.insert(LetterSpacingTag, propertyValue("font.letterSpacing").toFloat());
+
+    QColor fontColor(propertyValue("font.color").toString());
+    textDetails.insert(TextColorTag, fontColor.name(QColor::HexArgb));
+
+    textDetails.insert(HAlignTag, toJsonAlignEnum(propertyValue("horizontalAlignment").toString()));
+    textDetails.insert(VAlignTag, toJsonAlignEnum(propertyValue("verticalAlignment").toString()));
+
+    textDetails.insert(IsMultilineTag, propertyValue("wrapMode").toString().compare("NoWrap") != 0);
+
+    jsonObject.insert(TextDetailsTag, textDetails);
+    return  jsonObject;
+}
+}

src/plugins/qmldesigner/assetexporterplugin/parsers/textnodeparser.h

@@ -0,0 +1,43 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#pragma once
+
+#include "modelitemnodeparser.h"
+
+namespace QmlDesigner {
+class Component;
+
+class TextNodeParser : public ItemNodeParser
+{
+public:
+    TextNodeParser(const QByteArrayList &lineage, const ModelNode &node);
+    ~TextNodeParser() override = default;
+
+    bool isExportable() const override;
+    int priority() const override { return 200; }
+    QJsonObject json(Component &component) const override;
+};
+
+}

src/plugins/qmldesigner/components/componentcore/componentcore_constants.h

@@ -83,6 +83,8 @@ const char decreaseIndexOfStackedContainerCommandId[] = "DecreaseIndexOfStackedC
 const char flowAssignEffectCommandId[] = "AssignFlowEffect";
 const char flowAssignCustomEffectCommandId[] = "AssignFlowCustomEffect";
 const char addToGroupItemCommandId[] = "AddToGroupItem";
+const char fitRootToScreenCommandId[] = "FitRootToScreen";
+const char fitSelectionToScreenCommandId[] = "FitSelectionToScreen";
 
 const char selectionCategoryDisplayName[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Selection");
 const char flowConnectionCategoryDisplayName[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Connect");
@@ -155,6 +157,9 @@ const char layoutFillHeightDisplayName[] = QT_TRANSLATE_NOOP("QmlDesignerContext
 const char flowAssignEffectDisplayName[] = "Assign FlowEffect ";
 const char flowAssignCustomEffectDisplayName[] = "Assign Custom FlowEffect ";
 
+const char fitRootToScreenDisplayName[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Fit root to screen");
+const char fitSelectionToScreenDisplayName[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Fit selection to screen");
+
 const char raiseToolTip[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Raise selected item.");
 const char lowerToolTip[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Lower selected item.");
 
@@ -173,6 +178,9 @@ const char decreaseIndexOfStackedContainerToolTip[] = QT_TRANSLATE_NOOP("QmlDesi
 const char addItemToStackedContainerToolTip[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Add item to stacked container.");
 const char addFlowActionToolTip[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Add flow action.");
 
+const char fitRootToScreenToolTip[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Fit the root element inside the available space.");
+const char fitSelectionToScreenToolTip[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu", "Fit the selected elements inside the available space.");
+
 const int priorityFirst = 280;
 const int prioritySelectionCategory = 220;
 const int priorityQmlPreviewCategory = 200;

src/plugins/qmldesigner/components/componentcore/designeractionmanager.cpp

@@ -821,6 +821,27 @@ void DesignerActionManager::createDefaultDesignerActions()
                           &resetSize,
                           &selectionNotEmptyAndHasWidthOrHeightProperty));
 
+    addDesignerAction(new ModelNodeAction(
+                          fitRootToScreenCommandId,
+                          fitRootToScreenDisplayName,
+                          Utils::Icon({{":/utils/images/fittoview.png", Utils::Theme::IconsBaseColor}}).icon(),
+                          fitRootToScreenToolTip,
+                          genericToolBarCategory,
+                          QKeySequence(Qt::CTRL + Qt::ALT + Qt::Key_0),
+                          182,
+                          &fitRootToScreen));
+
+    addDesignerAction(new ModelNodeAction(
+                          fitSelectionToScreenCommandId,
+                          fitSelectionToScreenDisplayName,
+                          Utils::Icon({{":/utils/images/fittoview.png", Utils::Theme::IconsBaseColor}}).icon(),
+                          fitSelectionToScreenToolTip,
+                          genericToolBarCategory,
+                          QKeySequence(Qt::CTRL + Qt::ALT + Qt::Key_I),
+                          183,
+                          &fitSelectionToScreen,
+                          &selectionNotEmpty));
+
     addDesignerAction(new SeperatorDesignerAction(editCategory, 170));
 
     addDesignerAction(new VisiblityModelNodeAction(

src/plugins/qmldesigner/components/componentcore/modelnodeoperations.cpp

@@ -329,6 +329,23 @@ void resetPosition(const SelectionContext &selectionState)
     });
 }
 
+void fitRootToScreen(const SelectionContext &selectionState)
+{
+    if (!selectionState.view())
+        return;
+
+    selectionState.view()->emitCustomNotification(QStringLiteral("fit root to screen"));
+}
+
+void fitSelectionToScreen(const SelectionContext &selectionState)
+{
+    if (!selectionState.view())
+        return;
+
+    selectionState.view()->emitCustomNotification(QStringLiteral("fit selection to screen"),
+                                                  selectionState.selectedModelNodes());
+}
+
 void goIntoComponentOperation(const SelectionContext &selectionState)
 {
     goIntoComponent(selectionState.currentSingleSelectedNode());

src/plugins/qmldesigner/components/componentcore/modelnodeoperations.h

@@ -49,6 +49,8 @@ void setFillWidth(const SelectionContext &selectionState);
 void setFillHeight(const SelectionContext &selectionState);
 void resetSize(const SelectionContext &selectionState);
 void resetPosition(const SelectionContext &selectionState);
+void fitRootToScreen(const SelectionContext &selectionState);
+void fitSelectionToScreen(const SelectionContext &selectionState);
 void goIntoComponentOperation(const SelectionContext &selectionState);
 void setId(const SelectionContext &selectionState);
 void resetZ(const SelectionContext &selectionState);

src/plugins/qmldesigner/components/componentcore/zoomaction.cpp

@@ -30,7 +30,7 @@
 
 namespace QmlDesigner {
 
-const int defaultZoomIndex = 11;
+const int defaultZoomIndex = 13;
 
 ZoomAction::ZoomAction(QObject *parent)
     :  QWidgetAction(parent),
@@ -69,14 +69,19 @@ void ZoomAction::setZoomLevel(float zoomLevel)
     if (qFuzzyCompare(m_zoomLevel, zoomLevel))
         return;
 
+    forceZoomLevel(zoomLevel);
+}
+
+void ZoomAction::forceZoomLevel(float zoomLevel)
+{
     m_zoomLevel = qBound(0.01f, zoomLevel, 16.0f);
     emit zoomLevelChanged(m_zoomLevel);
 }
 
 //initial m_zoomLevel and m_currentComboBoxIndex
-const QVector<float> s_zoomFactors = {0.01f, 0.02f, 0.05f, 0.0625f, 0.125f, 0.25f,
-                                      0.33f, 0.5f, 0.66f, 0.75f, 0.9f, 1.0f, 1.25f,
-                                      1.5f, 1.75f, 2.0f, 3.0f, 4.0f, 6.0f, 8.0f, 10.0f, 16.0f };
+const QVector<float> s_zoomFactors = {0.01f, 0.02f, 0.05f, 0.0625f, 0.1f, 0.125f, 0.2f, 0.25f,
+                                      0.33f, 0.5f, 0.66f, 0.75f, 0.9f, 1.0f, 1.1f, 1.25f, 1.33f,
+                                      1.5f, 1.66f, 1.75f, 2.0f, 3.0f, 4.0f, 6.0f, 8.0f, 10.0f, 16.0f };
 
 int getZoomIndex(float zoom)
 {
@@ -87,6 +92,15 @@ int getZoomIndex(float zoom)
     return -1;
 }
 
+float ZoomAction::getClosestZoomLevel(float zoomLevel)
+{
+    int i = 0;
+    while (i < s_zoomFactors.size() && s_zoomFactors[i] < zoomLevel)
+        ++i;
+
+    return s_zoomFactors[qBound(0, i - 1, s_zoomFactors.size() - 1)];
+}
+
 QWidget *ZoomAction::createWidget(QWidget *parent)
 {
     auto comboBox = new QComboBox(parent);

src/plugins/qmldesigner/components/componentcore/zoomaction.h

@@ -48,6 +48,9 @@ public:
     void zoomOut();
     void resetZoomLevel();
     void setZoomLevel(float zoomLevel);
+    void forceZoomLevel(float zoomLevel);
+
+    static float getClosestZoomLevel(float zoomLevel);
 
 protected:
     QWidget *createWidget(QWidget *parent) override;

src/plugins/qmldesigner/components/connectioneditor/connectionmodel.cpp

@@ -269,6 +269,9 @@ void ConnectionModel::addConnection()
                     if (QmlItemNode(selectedNode).isFlowActionArea())
                         source = selectedNode.validId() + ".trigger()";
 
+                    if (QmlVisualNode(selectedNode).isFlowTransition())
+                        source = selectedNode.validId() + ".trigger()";
+
                     if (!connectionView()->selectedModelNodes().constFirst().id().isEmpty())
                     newNode.bindingProperty("target").setExpression(selectedNode.id());
                     else

src/plugins/qmldesigner/components/edit3d/edit3dview.cpp

@@ -112,7 +112,7 @@ void Edit3DView::updateActiveScene3D(const QVariantMap &sceneState)
     if (sceneState.contains(sceneKey)) {
         qint32 newActiveScene = sceneState[sceneKey].value<qint32>();
         edit3DWidget()->canvas()->updateActiveScene(newActiveScene);
-        rootModelNode().setAuxiliaryData("3d-active-scene", newActiveScene);
+        rootModelNode().setAuxiliaryData("active3dScene", newActiveScene);
     }
 
     if (sceneState.contains(selectKey))

src/plugins/qmldesigner/components/formeditor/formeditoritem.cpp

@@ -129,7 +129,7 @@ void FormEditorItem::setup()
 
 QRectF FormEditorItem::boundingRect() const
 {
-    return m_boundingRect.adjusted(-2, -2, 2, 2);
+    return m_boundingRect;
 }
 
 QPainterPath FormEditorItem::shape() const
@@ -150,7 +150,7 @@ void FormEditorItem::updateGeometry()
     prepareGeometryChange();
     m_selectionBoundingRect = qmlItemNode().instanceBoundingRect().adjusted(0, 0, 1., 1.);
     m_paintedBoundingRect = qmlItemNode().instancePaintedBoundingRect();
-    m_boundingRect = m_paintedBoundingRect.united(m_selectionBoundingRect);
+    m_boundingRect = qmlItemNode().instanceBoundingRect();
     setTransform(qmlItemNode().instanceTransformWithContentTransform());
     // the property for zValue is called z in QGraphicsObject
     if (qmlItemNode().instanceValue("z").isValid() && !qmlItemNode().isRootModelNode())
@@ -739,7 +739,7 @@ static bool isValid(const QList<QmlItemNode> &list)
         if (!item.isValid())
             return false;
 
-    return true;
+    return !list.isEmpty();
 }
 
 static bool isModelNodeValid(const QList<QmlItemNode> &list)
@@ -748,7 +748,7 @@ static bool isModelNodeValid(const QList<QmlItemNode> &list)
         if (!item.modelNode().isValid())
             return false;
 
-    return true;
+    return !list.isEmpty();
 }
 
 class ResolveConnection
@@ -797,17 +797,17 @@ public:
             if (f.isValid()) {
                 for (const QmlFlowActionAreaNode &area : f.flowActionAreas()) {
                     ModelNode target = area.targetTransition();
-                    if (target == node.modelNode()) {
+                    if (target == node.modelNode())
                         areaNode = area;
-                    } else {
-                        const ModelNode decisionNode = area.decisionNodeForTransition(node.modelNode());
-                        if (decisionNode.isValid()) {
-                            from.clear();
-                            from.append(decisionNode);
-                            areaNode = ModelNode();
-                        }
-                    }
                 }
+
+                const ModelNode decisionNode = QmlFlowItemNode::decisionNodeForTransition(node.modelNode());
+                if (decisionNode.isValid()) {
+                    from.clear();
+                    from.append(decisionNode);
+                    areaNode = ModelNode();
+                }
+
                 if (f.modelNode().hasAuxiliaryData("joinConnection"))
                     joinConnection = f.modelNode().auxiliaryData("joinConnection").toBool();
             } else {

src/plugins/qmldesigner/components/formeditor/formeditorview.cpp

@@ -442,12 +442,49 @@ void FormEditorView::documentMessagesChanged(const QList<DocumentMessage> &error
         m_formEditorWidget->hideErrorMessageBox();
 }
 
-void FormEditorView::customNotification(const AbstractView * /*view*/, const QString &identifier, const QList<ModelNode> &/*nodeList*/, const QList<QVariant> &/*data*/)
+void FormEditorView::customNotification(const AbstractView * /*view*/, const QString &identifier, const QList<ModelNode> &nodeList, const QList<QVariant> &/*data*/)
 {
     if (identifier == QLatin1String("puppet crashed"))
         m_dragTool->clearMoveDelay();
     if (identifier == QLatin1String("reset QmlPuppet"))
         temporaryBlockView();
+    if (identifier == QLatin1String("fit root to screen")) {
+        if (QmlItemNode(rootModelNode()).isFlowView()) {
+            QRectF boundingRect;
+            for (QGraphicsItem *item : scene()->items()) {
+                if (auto formEditorItem = FormEditorItem::fromQGraphicsItem(item)) {
+                    if (!formEditorItem->qmlItemNode().modelNode().isRootNode()
+                        && !formEditorItem->sceneBoundingRect().isNull())
+                        boundingRect = boundingRect.united(formEditorItem->sceneBoundingRect());
+                }
+            }
+            m_formEditorWidget->graphicsView()->fitInView(boundingRect,
+                                                          Qt::KeepAspectRatio);
+        } else {
+            m_formEditorWidget->graphicsView()->fitInView(m_formEditorWidget->rootItemRect(),
+                                                          Qt::KeepAspectRatio);
+        }
+
+        const qreal scaleFactor = m_formEditorWidget->graphicsView()->viewportTransform().m11();
+        float zoomLevel = ZoomAction::getClosestZoomLevel(scaleFactor);
+        m_formEditorWidget->zoomAction()->forceZoomLevel(zoomLevel);
+    }
+    if (identifier == QLatin1String("fit selection to screen")) {
+        if (nodeList.isEmpty())
+            return;
+
+        QRectF boundingRect;
+        for (const ModelNode &node : nodeList) {
+            if (FormEditorItem *item = scene()->itemForQmlItemNode(node))
+                boundingRect = boundingRect.united(item->sceneBoundingRect());
+        }
+
+        m_formEditorWidget->graphicsView()->fitInView(boundingRect,
+                                                      Qt::KeepAspectRatio);
+        const qreal scaleFactor = m_formEditorWidget->graphicsView()->viewportTransform().m11();
+        float zoomLevel = ZoomAction::getClosestZoomLevel(scaleFactor);
+        m_formEditorWidget->zoomAction()->forceZoomLevel(zoomLevel);
+    }
 }
 
 AbstractFormEditorTool *FormEditorView::currentTool() const

src/plugins/qmldesigner/components/integration/designdocument.cpp

@@ -469,7 +469,7 @@ void DesignDocument::paste()
                                            [](const ModelNode &node) { return !node.isSubclassOf("QtQuick3D.Node"); })
                               == selectedNodes.end();
             if (all3DNodes) {
-                int activeSceneId = rootModelNode().auxiliaryData("3d-active-scene").toInt();
+                int activeSceneId = rootModelNode().auxiliaryData("active3dScene").toInt();
                 if (activeSceneId != -1) {
                     NodeListProperty sceneNodeProperty
                             = QmlVisualNode::findSceneNodeProperty(rootModelNode().view(), activeSceneId);
@@ -515,7 +515,7 @@ void DesignDocument::paste()
             } else {
                 // if selection is empty and this is a 3D Node, paste it under the active scene
                 if (pastedNode.isSubclassOf("QtQuick3D.Node")) {
-                    int activeSceneId = rootModelNode().auxiliaryData("3d-active-scene").toInt();
+                    int activeSceneId = rootModelNode().auxiliaryData("active3dScene").toInt();
                     if (activeSceneId != -1) {
                         NodeListProperty sceneNodeProperty
                                 = QmlVisualNode::findSceneNodeProperty(rootModelNode().view(), activeSceneId);

src/plugins/qmldesigner/components/propertyeditor/propertyeditorview.cpp

@@ -469,8 +469,8 @@ void PropertyEditorView::setupQmlBackend()
         if (m_selectedNode.isValid()) {
             qmlObjectNode = QmlObjectNode(m_selectedNode);
             Q_ASSERT(qmlObjectNode.isValid());
+            currentQmlBackend->setup(qmlObjectNode, currentStateName, qmlSpecificsFile, this);
         }
-        currentQmlBackend->setup(qmlObjectNode, currentStateName, qmlSpecificsFile, this);
         currentQmlBackend->context()->setContextProperty("finishedNotify", QVariant(false));
         if (specificQmlData.isEmpty())
             currentQmlBackend->contextObject()->setSpecificQmlData(specificQmlData);

src/plugins/qmldesigner/components/timelineeditor/timelineabstracttool.cpp

@@ -31,12 +31,12 @@
 
 namespace QmlDesigner {
 
-TimelineAbstractTool::TimelineAbstractTool(TimelineGraphicsScene *scene)
+TimelineAbstractTool::TimelineAbstractTool(AbstractScrollGraphicsScene *scene)
     : m_scene(scene)
     , m_delegate(nullptr)
 {}
 
-TimelineAbstractTool::TimelineAbstractTool(TimelineGraphicsScene *scene,
+TimelineAbstractTool::TimelineAbstractTool(AbstractScrollGraphicsScene *scene,
                                            TimelineToolDelegate *delegate)
     : m_scene(scene)
     , m_delegate(delegate)
@@ -44,7 +44,7 @@ TimelineAbstractTool::TimelineAbstractTool(TimelineGraphicsScene *scene,
 
 TimelineAbstractTool::~TimelineAbstractTool() = default;
 
-TimelineGraphicsScene *TimelineAbstractTool::scene() const
+AbstractScrollGraphicsScene *TimelineAbstractTool::scene() const
 {
     return m_scene;
 }

src/plugins/qmldesigner/components/timelineeditor/timelineabstracttool.h

@@ -36,14 +36,14 @@ namespace QmlDesigner {
 enum class ToolType { Move, Select };
 
 class TimelineMovableAbstractItem;
-class TimelineGraphicsScene;
+class AbstractScrollGraphicsScene;
 class TimelineToolDelegate;
 
 class TimelineAbstractTool
 {
 public:
-    explicit TimelineAbstractTool(TimelineGraphicsScene *scene);
-    explicit TimelineAbstractTool(TimelineGraphicsScene *scene, TimelineToolDelegate *delegate);
+    explicit TimelineAbstractTool(AbstractScrollGraphicsScene *scene);
+    explicit TimelineAbstractTool(AbstractScrollGraphicsScene *scene, TimelineToolDelegate *delegate);
     virtual ~TimelineAbstractTool();
 
     virtual void mousePressEvent(TimelineMovableAbstractItem *item, QGraphicsSceneMouseEvent *event) = 0;
@@ -56,7 +56,7 @@ public:
     virtual void keyPressEvent(QKeyEvent *keyEvent) = 0;
     virtual void keyReleaseEvent(QKeyEvent *keyEvent) = 0;
 
-    TimelineGraphicsScene *scene() const;
+    AbstractScrollGraphicsScene *scene() const;
 
     TimelineToolDelegate *delegate() const;
 
@@ -65,7 +65,7 @@ public:
     TimelineMovableAbstractItem *currentItem() const;
 
 private:
-    TimelineGraphicsScene *m_scene;
+    AbstractScrollGraphicsScene *m_scene;
 
     TimelineToolDelegate *m_delegate;
 };

src/plugins/qmldesigner/components/timelineeditor/timelinegraphicsscene.cpp

@@ -91,7 +91,7 @@ QList<QmlTimelineKeyframeGroup> allTimelineFrames(const QmlTimeline &timeline)
 }
 
 TimelineGraphicsScene::TimelineGraphicsScene(TimelineWidget *parent)
-    : QGraphicsScene(parent)
+    : AbstractScrollGraphicsScene(parent)
     , m_parent(parent)
     , m_layout(new TimelineGraphicsLayout(this))
     , m_currentFrameIndicator(new TimelineFrameHandle)
@@ -378,17 +378,17 @@ void TimelineGraphicsScene::commitCurrentFrame(qreal frame)
     }
 }
 
-QList<TimelineKeyframeItem *> TimelineGraphicsScene::selectedKeyframes() const
+QList<TimelineKeyframeItem *> AbstractScrollGraphicsScene::selectedKeyframes() const
 {
     return m_selectedKeyframes;
 }
 
-bool TimelineGraphicsScene::hasSelection() const
+bool AbstractScrollGraphicsScene::hasSelection() const
 {
     return !m_selectedKeyframes.empty();
 }
 
-bool TimelineGraphicsScene::isCurrent(TimelineKeyframeItem *keyframe) const
+bool AbstractScrollGraphicsScene::isCurrent(TimelineKeyframeItem *keyframe) const
 {
     if (m_selectedKeyframes.empty())
         return false;
@@ -396,12 +396,12 @@ bool TimelineGraphicsScene::isCurrent(TimelineKeyframeItem *keyframe) const
     return m_selectedKeyframes.back() == keyframe;
 }
 
-bool TimelineGraphicsScene::isKeyframeSelected(TimelineKeyframeItem *keyframe) const
+bool AbstractScrollGraphicsScene::isKeyframeSelected(TimelineKeyframeItem *keyframe) const
 {
     return m_selectedKeyframes.contains(keyframe);
 }
 
-bool TimelineGraphicsScene::multipleKeyframesSelected() const
+bool AbstractScrollGraphicsScene::multipleKeyframesSelected() const
 {
     return m_selectedKeyframes.count() > 1;
 }
@@ -456,19 +456,19 @@ void TimelineGraphicsScene::invalidateRecordButtonsStatus()
         TimelinePropertyItem::updateRecordButtonStatus(item);
 }
 
-int TimelineGraphicsScene::scrollOffset() const
+int AbstractScrollGraphicsScene::scrollOffset() const
 {
     return m_scrollOffset;
 }
 
-void TimelineGraphicsScene::setScrollOffset(int offset)
+void AbstractScrollGraphicsScene::setScrollOffset(int offset)
 {
     m_scrollOffset = offset;
     emitScrollOffsetChanged();
     update();
 }
 
-QGraphicsView *TimelineGraphicsScene::graphicsView() const
+QGraphicsView *AbstractScrollGraphicsScene::graphicsView() const
 {
     for (auto *v : views())
         if (v->objectName() == "SceneView")
@@ -477,7 +477,7 @@ QGraphicsView *TimelineGraphicsScene::graphicsView() const
     return nullptr;
 }
 
-QGraphicsView *TimelineGraphicsScene::rulerView() const
+QGraphicsView *AbstractScrollGraphicsScene::rulerView() const
 {
     for (auto *v : views())
         if (v->objectName() == "RulerView")
@@ -491,7 +491,7 @@ QmlTimeline TimelineGraphicsScene::currentTimeline() const
     return QmlTimeline(timelineModelNode());
 }
 
-QRectF TimelineGraphicsScene::selectionBounds() const
+QRectF AbstractScrollGraphicsScene::selectionBounds() const
 {
     QRectF bbox;
 
@@ -501,7 +501,7 @@ QRectF TimelineGraphicsScene::selectionBounds() const
     return bbox;
 }
 
-void TimelineGraphicsScene::selectKeyframes(const SelectionMode &mode,
+void AbstractScrollGraphicsScene::selectKeyframes(const SelectionMode &mode,
                                             const QList<TimelineKeyframeItem *> &items)
 {
     if (mode == SelectionMode::Remove || mode == SelectionMode::Toggle) {
@@ -536,13 +536,14 @@ void TimelineGraphicsScene::selectKeyframes(const SelectionMode &mode,
     emit selectionChanged();
 }
 
-void TimelineGraphicsScene::clearSelection()
+void AbstractScrollGraphicsScene::clearSelection()
 {
     for (auto *keyframe : m_selectedKeyframes)
         if (keyframe)
             keyframe->setHighlighted(false);
 
     m_selectedKeyframes.clear();
+    emit selectionChanged();
 }
 
 QList<QGraphicsItem *> TimelineGraphicsScene::itemsAt(const QPointF &pos)
@@ -682,7 +683,7 @@ ModelNode TimelineGraphicsScene::timelineModelNode() const
 void TimelineGraphicsScene::handleKeyframeDeletion()
 {
     QList<ModelNode> nodesToBeDeleted;
-    for (auto keyframe : m_selectedKeyframes) {
+    for (auto keyframe : selectedKeyframes()) {
         nodesToBeDeleted.append(keyframe->frameNode());
     }
     deleteKeyframes(nodesToBeDeleted);
@@ -711,7 +712,7 @@ void TimelineGraphicsScene::pasteKeyframesToTarget(const ModelNode &targetNode)
 void TimelineGraphicsScene::copySelectedKeyframes()
 {
     TimelineActions::copyKeyframes(
-        Utils::transform(m_selectedKeyframes, &TimelineKeyframeItem::frameNode));
+        Utils::transform(selectedKeyframes(), &TimelineKeyframeItem::frameNode));
 }
 
 void TimelineGraphicsScene::pasteSelectedKeyframes()
@@ -756,7 +757,20 @@ void TimelineGraphicsScene::activateLayout()
     m_layout->activate();
 }
 
-void TimelineGraphicsScene::emitScrollOffsetChanged()
+AbstractView *TimelineGraphicsScene::abstractView() const
+{
+    return timelineView();
+}
+
+int AbstractScrollGraphicsScene::getScrollOffset(QGraphicsScene *scene)
+{
+    auto scrollScene = qobject_cast<AbstractScrollGraphicsScene*>(scene);
+    if (scrollScene)
+        return scrollScene->scrollOffset();
+    return 0;
+}
+
+void AbstractScrollGraphicsScene::emitScrollOffsetChanged()
 {
     for (QGraphicsItem *item : items())
         TimelineMovableAbstractItem::emitScrollOffsetChanged(item);
@@ -783,4 +797,8 @@ bool TimelineGraphicsScene::event(QEvent *event)
     }
 }
 
+QmlDesigner::AbstractScrollGraphicsScene::AbstractScrollGraphicsScene(QWidget *parent)
+    : QGraphicsScene(parent)
+{}
+
 } // namespace QmlDesigner

src/plugins/qmldesigner/components/timelineeditor/timelinegraphicsscene.h

@@ -36,6 +36,7 @@
 
 QT_FORWARD_DECLARE_CLASS(QGraphicsLinearLayout)
 QT_FORWARD_DECLARE_CLASS(QComboBox)
+QT_FORWARD_DECLARE_CLASS(QWidget)
 
 namespace QmlDesigner {
 
@@ -51,15 +52,66 @@ class TimelinePlaceholder;
 class TimelineGraphicsLayout;
 class TimelineToolBar;
 
-class TimelineGraphicsScene : public QGraphicsScene
+class AbstractScrollGraphicsScene : public QGraphicsScene
 {
     Q_OBJECT
 
-signals:
-    void selectionChanged();
+public:
+    AbstractScrollGraphicsScene(QWidget *parent);
+    ;
 
+    int scrollOffset() const;
+    void setScrollOffset(int offset);
+    static int getScrollOffset(QGraphicsScene *scene);
+
+    QRectF selectionBounds() const;
+
+    void selectKeyframes(const SelectionMode &mode, const QList<TimelineKeyframeItem *> &items);
+    virtual void clearSelection();
+    QList<TimelineKeyframeItem *> selectedKeyframes() const;
+    bool hasSelection() const;
+    bool isCurrent(TimelineKeyframeItem *keyframe) const;
+    bool isKeyframeSelected(TimelineKeyframeItem *keyframe) const;
+    bool multipleKeyframesSelected() const;
+
+    virtual qreal rulerScaling() const = 0;
+    virtual int rulerWidth() const = 0;
+    virtual qreal rulerDuration() const = 0;
+
+    virtual AbstractView *abstractView() const = 0;
+
+    virtual void setCurrentFrame(int) {}
+
+    virtual qreal startFrame() const  = 0;
+    virtual qreal endFrame() const  = 0;
+
+    virtual void invalidateScrollbar() = 0;
+
+    virtual qreal snap(qreal frame, bool snapToPlayhead = true)
+    {
+        Q_UNUSED(snapToPlayhead);
+        return frame;
+    }
+
+    QGraphicsView *graphicsView() const;
+    QGraphicsView *rulerView() const;
+
+signals:
+    void statusBarMessageChanged(const QString &message);
+    void selectionChanged();
     void scroll(const TimelineUtils::Side &side);
 
+private:
+    void emitScrollOffsetChanged();
+
+    int m_scrollOffset = 0;
+    QList<TimelineKeyframeItem *> m_selectedKeyframes;
+};
+
+class TimelineGraphicsScene : public AbstractScrollGraphicsScene
+{
+    Q_OBJECT
+
 public:
     explicit TimelineGraphicsScene(TimelineWidget *parent);
 
@@ -74,7 +126,7 @@ public:
 
     void invalidateLayout();
     qreal setCurrenFrame(const QmlTimeline &timeline, qreal frame);
-    void setCurrentFrame(int frame);
+    void setCurrentFrame(int frame) override;
     void setStartFrame(int frame);
     void setEndFrame(int frame);
 
@@ -82,11 +134,12 @@ public:
     TimelineWidget *timelineWidget() const;
     TimelineToolBar *toolBar() const;
 
-    qreal rulerScaling() const;
-    int rulerWidth() const;
-    qreal rulerDuration() const;
-    qreal startFrame() const;
-    qreal endFrame() const;
+    qreal rulerScaling() const override;
+    int rulerWidth() const override;
+    qreal rulerDuration() const override;
+
+    qreal startFrame() const override;
+    qreal endFrame() const override;
 
     void updateKeyframePositionsCache();
 
@@ -97,39 +150,22 @@ public:
     QVector<qreal> keyframePositions() const;
     QVector<qreal> keyframePositions(const QmlTimelineKeyframeGroup &frames) const;
 
-    qreal snap(qreal frame, bool snapToPlayhead = true);
+    qreal snap(qreal frame, bool snapToPlayhead = true) override;
 
     void setRulerScaling(int scaling);
 
     void commitCurrentFrame(qreal frame);
 
-    QList<TimelineKeyframeItem *> selectedKeyframes() const;
-
-    bool hasSelection() const;
-    bool isCurrent(TimelineKeyframeItem *keyframe) const;
-    bool isKeyframeSelected(TimelineKeyframeItem *keyframe) const;
-    bool multipleKeyframesSelected() const;
-
     void invalidateSectionForTarget(const ModelNode &modelNode);
     void invalidateKeyframesForTarget(const ModelNode &modelNode);
 
     void invalidateScene();
-    void invalidateScrollbar();
+    void invalidateScrollbar() override;
     void invalidateCurrentValues();
     void invalidateRecordButtonsStatus();
 
-    int scrollOffset() const;
-    void setScrollOffset(int offset);
-    QGraphicsView *graphicsView() const;
-    QGraphicsView *rulerView() const;
-
     QmlTimeline currentTimeline() const;
 
-    QRectF selectionBounds() const;
-
-    void selectKeyframes(const SelectionMode &mode, const QList<TimelineKeyframeItem *> &items);
-    void clearSelection();
-
     void handleKeyframeDeletion();
     void deleteAllKeyframesForTarget(const ModelNode &targetNode);
     void insertAllKeyframesForTarget(const ModelNode &targetNode);
@@ -143,8 +179,7 @@ public:
 
     void activateLayout();
 
-signals:
-    void statusBarMessageChanged(const QString &message);
+    AbstractView *abstractView() const override;
 
 protected:
     bool event(QEvent *event) override;
@@ -163,7 +198,6 @@ private:
     void invalidateSections();
     ModelNode timelineModelNode() const;
 
-    void emitScrollOffsetChanged();
     void emitStatusBarPlayheadFrameChanged(int frame);
 
     QList<QGraphicsItem *> itemsAt(const QPointF &pos);
@@ -178,12 +212,8 @@ private:
 
     TimelineToolDelegate m_tools;
 
-    QList<TimelineKeyframeItem *> m_selectedKeyframes;
-
     // sorted, unique cache of keyframes positions, used for snapping
     QVector<qreal> m_keyframePositionsCache;
-
-    int m_scrollOffset = 0;
 };
 
 } // namespace QmlDesigner

src/plugins/qmldesigner/components/timelineeditor/timelineitem.cpp

@@ -52,8 +52,7 @@ TimelineItem::TimelineItem(TimelineItem *parent)
 
 TimelineGraphicsScene *TimelineItem::timelineScene() const
 {
-    return static_cast<TimelineGraphicsScene *>(scene());
-    ;
+    return qobject_cast<TimelineGraphicsScene *>(scene());
 }
 
 TimelineFrameHandle::TimelineFrameHandle(TimelineItem *parent)
@@ -93,7 +92,7 @@ void TimelineFrameHandle::setPosition(qreal frame)
 
 void TimelineFrameHandle::setPositionInteractive(const QPointF &position)
 {
-    const double width = timelineScene()->width();
+    const double width = abstractScrollGraphicsScene()->width();
 
     if (position.x() > width) {
         callSetClampedXPosition(width - (rect().width() / 2) - 1);
@@ -104,7 +103,7 @@ void TimelineFrameHandle::setPositionInteractive(const QPointF &position)
     } else {
         callSetClampedXPosition(position.x() - rect().width() / 2);
         const qreal frame = std::round(mapFromSceneToFrame(rect().center().x()));
-        timelineScene()->commitCurrentFrame(frame);
+        timelineGraphicsScene()->commitCurrentFrame(frame);
     }
 }
 
@@ -128,6 +127,11 @@ TimelineFrameHandle *TimelineFrameHandle::asTimelineFrameHandle()
     return this;
 }
 
+TimelineGraphicsScene *TimelineFrameHandle::timelineGraphicsScene() const
+{
+    return qobject_cast<TimelineGraphicsScene* >(abstractScrollGraphicsScene());
+}
+
 void TimelineFrameHandle::scrollOffsetChanged()
 {
     setPosition(position());
@@ -182,7 +186,7 @@ void TimelineFrameHandle::paint(QPainter *painter,
 
 QPointF TimelineFrameHandle::mapFromGlobal(const QPoint &pos) const
 {
-    for (auto *view : timelineScene()->views()) {
+    for (auto *view : abstractScrollGraphicsScene()->views()) {
         if (view->objectName() == "SceneView") {
             auto graphicsViewCoords = view->mapFromGlobal(pos);
             auto sceneCoords = view->mapToScene(graphicsViewCoords);
@@ -195,7 +199,7 @@ QPointF TimelineFrameHandle::mapFromGlobal(const QPoint &pos) const
 int TimelineFrameHandle::computeScrollSpeed() const
 {
     const double mouse = mapFromGlobal(QCursor::pos()).x();
-    const double width = timelineScene()->width();
+    const double width = abstractScrollGraphicsScene()->width();
 
     const double acc = mouse > width ? mouse - width
                                      : double(TimelineConstants::sectionWidth) - mouse;
@@ -216,7 +220,7 @@ void TimelineFrameHandle::callSetClampedXPosition(double x)
     const int minimumWidth = TimelineConstants::sectionWidth + TimelineConstants::timelineLeftOffset
                              - rect().width() / 2;
     const int maximumWidth = minimumWidth
-                             + timelineScene()->rulerDuration() * timelineScene()->rulerScaling()
+                             + abstractScrollGraphicsScene()->rulerDuration() * abstractScrollGraphicsScene()->rulerScaling()
                              - scrollOffset();
 
     setClampedXPosition(x, minimumWidth, maximumWidth);
@@ -225,7 +229,7 @@ void TimelineFrameHandle::callSetClampedXPosition(double x)
 // Auto scroll when dragging playhead out of bounds.
 void TimelineFrameHandle::scrollOutOfBounds()
 {
-    const double width = timelineScene()->width();
+    const double width = abstractScrollGraphicsScene()->width();
     const double mouse = mapFromGlobal(QCursor::pos()).x();
 
     if (mouse > width)
@@ -236,14 +240,14 @@ void TimelineFrameHandle::scrollOutOfBounds()
 
 void TimelineFrameHandle::scrollOutOfBoundsMax()
 {
-    const double width = timelineScene()->width();
+    const double width = abstractScrollGraphicsScene()->width();
     if (QApplication::mouseButtons() == Qt::LeftButton) {
-        const double frameWidth = timelineScene()->rulerScaling();
+        const double frameWidth = abstractScrollGraphicsScene()->rulerScaling();
         const double upperThreshold = width - frameWidth;
 
         if (rect().center().x() > upperThreshold) {
-            timelineScene()->setScrollOffset(computeScrollSpeed());
-            timelineScene()->invalidateScrollbar();
+            abstractScrollGraphicsScene()->setScrollOffset(computeScrollSpeed());
+            abstractScrollGraphicsScene()->invalidateScrollbar();
         }
 
         callSetClampedXPosition(width - (rect().width() / 2) - 1);
@@ -253,8 +257,8 @@ void TimelineFrameHandle::scrollOutOfBoundsMax()
         callSetClampedXPosition(width - (rect().width() / 2) - 1);
 
         const int frame = std::floor(mapFromSceneToFrame(rect().center().x()));
-        const int ef = timelineScene()->endFrame();
-        timelineScene()->commitCurrentFrame(frame <= ef ? frame : ef);
+        const int ef = abstractScrollGraphicsScene()->endFrame();
+        timelineGraphicsScene()->commitCurrentFrame(frame <= ef ? frame : ef);
     }
 }
 
@@ -264,11 +268,11 @@ void TimelineFrameHandle::scrollOutOfBoundsMin()
         auto offset = computeScrollSpeed();
 
         if (offset >= 0)
-            timelineScene()->setScrollOffset(offset);
+            abstractScrollGraphicsScene()->setScrollOffset(offset);
         else
-            timelineScene()->setScrollOffset(0);
+            abstractScrollGraphicsScene()->setScrollOffset(0);
 
-        timelineScene()->invalidateScrollbar();
+        abstractScrollGraphicsScene()->invalidateScrollbar();
 
         callSetClampedXPosition(TimelineConstants::sectionWidth);
         m_timer.start();
@@ -278,7 +282,7 @@ void TimelineFrameHandle::scrollOutOfBoundsMin()
 
         int frame = mapFromSceneToFrame(rect().center().x());
 
-        const int sframe = timelineScene()->startFrame();
+        const int sframe = abstractScrollGraphicsScene()->startFrame();
         if (frame != sframe) {
             const qreal framePos = mapFromFrameToScene(frame);
 
@@ -287,7 +291,7 @@ void TimelineFrameHandle::scrollOutOfBoundsMin()
                 frame++;
         }
 
-        timelineScene()->commitCurrentFrame(frame >= sframe ? frame : sframe);
+        timelineGraphicsScene()->commitCurrentFrame(frame >= sframe ? frame : sframe);
     }
 }
 

src/plugins/qmldesigner/components/timelineeditor/timelineitem.h

@@ -35,6 +35,8 @@ QT_FORWARD_DECLARE_CLASS(QPainterPath)
 
 namespace QmlDesigner {
 
+class TimelineGraphicsScene;
+
 class TimelineItem : public QGraphicsWidget
 {
     Q_OBJECT
@@ -59,6 +61,8 @@ public:
 
     TimelineFrameHandle *asTimelineFrameHandle() override;
 
+    TimelineGraphicsScene *timelineGraphicsScene() const;
+
 protected:
     void scrollOffsetChanged() override;
     QPainterPath shape() const override;

src/plugins/qmldesigner/components/timelineeditor/timelinemovableabstractitem.cpp

@@ -53,7 +53,7 @@ void TimelineMovableAbstractItem::itemDoubleClicked()
 
 int TimelineMovableAbstractItem::scrollOffset() const
 {
-    return timelineScene()->scrollOffset();
+    return abstractScrollGraphicsScene()->scrollOffset();
 }
 
 int TimelineMovableAbstractItem::xPosScrollOffset(int x) const
@@ -63,7 +63,7 @@ int TimelineMovableAbstractItem::xPosScrollOffset(int x) const
 
 qreal TimelineMovableAbstractItem::mapFromFrameToScene(qreal x) const
 {
-    return TimelineConstants::sectionWidth + (x - timelineScene()->startFrame()) * rulerScaling()
+    return TimelineConstants::sectionWidth + (x - abstractScrollGraphicsScene()->startFrame()) * rulerScaling()
            - scrollOffset() + TimelineConstants::timelineLeftOffset;
 }
 
@@ -71,8 +71,8 @@ qreal TimelineMovableAbstractItem::mapFromSceneToFrame(qreal x) const
 {
     return xPosScrollOffset(x - TimelineConstants::sectionWidth
                             - TimelineConstants::timelineLeftOffset)
-               / timelineScene()->rulerScaling()
-           + timelineScene()->startFrame();
+               / abstractScrollGraphicsScene()->rulerScaling()
+           + abstractScrollGraphicsScene()->startFrame();
 }
 
 void TimelineMovableAbstractItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
@@ -133,7 +133,7 @@ TimelineKeyframeItem *TimelineMovableAbstractItem::asTimelineKeyframeItem(QGraph
 
 qreal TimelineMovableAbstractItem::rulerScaling() const
 {
-    return static_cast<TimelineGraphicsScene *>(scene())->rulerScaling();
+    return qobject_cast<AbstractScrollGraphicsScene *>(scene())->rulerScaling();
 }
 
 int TimelineMovableAbstractItem::type() const
@@ -141,9 +141,9 @@ int TimelineMovableAbstractItem::type() const
     return Type;
 }
 
-TimelineGraphicsScene *TimelineMovableAbstractItem::timelineScene() const
+AbstractScrollGraphicsScene *TimelineMovableAbstractItem::abstractScrollGraphicsScene() const
 {
-    return static_cast<TimelineGraphicsScene *>(scene());
+    return qobject_cast<AbstractScrollGraphicsScene *>(scene());
 }
 
 TimelineKeyframeItem *TimelineMovableAbstractItem::asTimelineKeyframeItem()

src/plugins/qmldesigner/components/timelineeditor/timelinemovableabstractitem.h

@@ -32,7 +32,7 @@
 
 namespace QmlDesigner {
 
-class TimelineGraphicsScene;
+class AbstractScrollGraphicsScene;
 class TimelineKeyframeItem;
 class TimelineFrameHandle;
 
@@ -75,7 +75,7 @@ protected:
     void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
 
     void setClampedXPosition(qreal x, qreal min, qreal max);
-    TimelineGraphicsScene *timelineScene() const;
+    AbstractScrollGraphicsScene *abstractScrollGraphicsScene() const;
 };
 
 } // namespace QmlDesigner

src/plugins/qmldesigner/components/timelineeditor/timelinemovetool.cpp

@@ -61,7 +61,7 @@ QPointF mapToItem(TimelineMovableAbstractItem *item, QGraphicsSceneMouseEvent *e
     return event->scenePos();
 }
 
-TimelineMoveTool::TimelineMoveTool(TimelineGraphicsScene *scene, TimelineToolDelegate *delegate)
+TimelineMoveTool::TimelineMoveTool(AbstractScrollGraphicsScene *scene, TimelineToolDelegate *delegate)
     : TimelineAbstractTool(scene, delegate)
 {}
 
@@ -155,7 +155,7 @@ void TimelineMoveTool::mouseReleaseEvent(TimelineMovableAbstractItem *item,
             }
         }
 
-        scene()->timelineView()->executeInTransaction("TimelineMoveTool::mouseReleaseEvent",
+        scene()->abstractView()->executeInTransaction("TimelineMoveTool::mouseReleaseEvent",
                                                       [this, current]() {
             current->commitPosition(mapToItem(current, current->rect().center()));
 

src/plugins/qmldesigner/components/timelineeditor/timelinemovetool.h

@@ -41,7 +41,7 @@ class TimelineMoveTool : public TimelineAbstractTool
     Q_DECLARE_TR_FUNCTIONS(TimelineMoveTool)
 
 public:
-    explicit TimelineMoveTool(TimelineGraphicsScene *scene, TimelineToolDelegate *delegate);
+    explicit TimelineMoveTool(AbstractScrollGraphicsScene *scene, TimelineToolDelegate *delegate);
     void mousePressEvent(TimelineMovableAbstractItem *item,
                          QGraphicsSceneMouseEvent *event) override;
     void mouseMoveEvent(TimelineMovableAbstractItem *item, QGraphicsSceneMouseEvent *event) override;

src/plugins/qmldesigner/components/timelineeditor/timelinepropertyitem.cpp

@@ -505,7 +505,7 @@ TimelineKeyframeItem::TimelineKeyframeItem(TimelinePropertyItem *parent, const M
 
 TimelineKeyframeItem::~TimelineKeyframeItem()
 {
-    timelineScene()->selectKeyframes(SelectionMode::Remove, {this});
+    abstractScrollGraphicsScene()->selectKeyframes(SelectionMode::Remove, {this});
 }
 
 void TimelineKeyframeItem::updateFrame()
@@ -555,8 +555,8 @@ void TimelineKeyframeItem::commitPosition(const QPointF &point)
 
 void TimelineKeyframeItem::itemDoubleClicked()
 {
-    std::pair<qreal, qreal> timelineRange = {timelineScene()->currentTimeline().startKeyframe(),
-                                             timelineScene()->currentTimeline().endKeyframe()};
+    std::pair<qreal, qreal> timelineRange = {timelineGraphicsScene()->currentTimeline().startKeyframe(),
+                                             timelineGraphicsScene()->currentTimeline().endKeyframe()};
     editValue(m_frame, timelineRange, propertyItem()->propertyName());
 }
 
@@ -565,6 +565,11 @@ TimelineKeyframeItem *TimelineKeyframeItem::asTimelineKeyframeItem()
     return this;
 }
 
+TimelineGraphicsScene *TimelineKeyframeItem::timelineGraphicsScene() const
+{
+    return qobject_cast<TimelineGraphicsScene *>(abstractScrollGraphicsScene());
+}
+
 void TimelineKeyframeItem::blockUpdates()
 {
     s_blockUpdates = true;
@@ -643,21 +648,21 @@ void TimelineKeyframeItem::contextMenuEvent(QGraphicsSceneContextMenuEvent *even
     QMenu mainMenu;
     QAction *removeAction = mainMenu.addAction(tr("Delete Keyframe"));
     QObject::connect(removeAction, &QAction::triggered, [this]() {
-        timelineScene()->handleKeyframeDeletion();
+        timelineGraphicsScene()->handleKeyframeDeletion();
     });
 
     QAction *editEasingAction = mainMenu.addAction(tr("Edit Easing Curve..."));
     QObject::connect(editEasingAction, &QAction::triggered, [this]() {
-        const QList<ModelNode> keys = Utils::transform(timelineScene()->selectedKeyframes(),
+        const QList<ModelNode> keys = Utils::transform(abstractScrollGraphicsScene()->selectedKeyframes(),
                                                        &TimelineKeyframeItem::m_frame);
 
-        setEasingCurve(timelineScene(), keys);
+        setEasingCurve(timelineGraphicsScene(), keys);
     });
 
     QAction *editValueAction = mainMenu.addAction(tr("Edit Keyframe..."));
     QObject::connect(editValueAction, &QAction::triggered, [this]() {
-        std::pair<qreal, qreal> timelineRange = {timelineScene()->currentTimeline().startKeyframe(),
-                                                 timelineScene()->currentTimeline().endKeyframe()};
+        std::pair<qreal, qreal> timelineRange = {timelineGraphicsScene()->currentTimeline().startKeyframe(),
+                                                 timelineGraphicsScene()->currentTimeline().endKeyframe()};
         editValue(m_frame, timelineRange, propertyItem()->propertyName());
     });
 

src/plugins/qmldesigner/components/timelineeditor/timelinepropertyitem.h

@@ -67,6 +67,7 @@ public:
     void itemDoubleClicked() override;
 
     TimelineKeyframeItem *asTimelineKeyframeItem() override;
+    TimelineGraphicsScene *timelineGraphicsScene() const;
 
 protected:
     bool hasManualBezier() const;

src/plugins/qmldesigner/components/timelineeditor/timelinesectionitem.cpp

@@ -1,4 +1,4 @@
-/****************************************************************************
+/****************************************************************************
 **
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
@@ -215,15 +215,7 @@ QVector<qreal> TimelineSectionItem::keyframePositions() const
     return out;
 }
 
-QTransform rotatationTransform(qreal degrees)
-{
-    QTransform transform;
-    transform.rotate(degrees);
-
-    return transform;
-}
-
-QPixmap rotateby90(const QPixmap &pixmap)
+static QPixmap rotateby90(const QPixmap &pixmap)
 {
     QImage sourceImage = pixmap.toImage();
     QImage destImage(pixmap.height(), pixmap.width(), sourceImage.format());
@@ -550,6 +542,13 @@ void TimelineRulerSectionItem::invalidateRulerSize(const QmlTimeline &timeline)
     m_end = timeline.endKeyframe();
 }
 
+void TimelineRulerSectionItem::invalidateRulerSize(const qreal length)
+{
+    m_duration = length;
+    m_start = 0;
+    m_end = length;
+}
+
 void TimelineRulerSectionItem::setRulerScaleFactor(int scaling)
 {
     qreal blend = qreal(scaling) / 100.0;
@@ -627,10 +626,12 @@ void TimelineRulerSectionItem::paint(QPainter *painter, const QStyleOptionGraphi
     static const QColor highlightColor = Theme::instance()->Theme::qmlDesignerButtonColor();
     static const QColor handleColor = Theme::getColor(Theme::QmlDesigner_HighlightColor);
 
+    const int scrollOffset = TimelineGraphicsScene::getScrollOffset(scene());
+
     painter->save();
     painter->save();
     painter->setRenderHint(QPainter::Antialiasing);
-    painter->translate(-timelineScene()->scrollOffset(), 0);
+    painter->translate(-scrollOffset, 0);
     painter->fillRect(TimelineConstants::sectionWidth,
                       0,
                       size().width() - TimelineConstants::sectionWidth,
@@ -666,11 +667,13 @@ void TimelineRulerSectionItem::paint(QPainter *painter, const QStyleOptionGraphi
 
     const int height = size().height() - 1;
 
+
+
     drawLine(painter,
-             TimelineConstants::sectionWidth + timelineScene()->scrollOffset()
+             TimelineConstants::sectionWidth + scrollOffset
                  - TimelineConstants::timelineLeftOffset,
              height,
-             size().width() + timelineScene()->scrollOffset(),
+             size().width() + scrollOffset,
              height);
 
     QFont font = painter->font();
@@ -720,9 +723,12 @@ void TimelineRulerSectionItem::paintTicks(QPainter *painter)
 
     m_frameTick = qreal(deltaLine);
 
+    int scrollOffset = TimelineGraphicsScene::getScrollOffset(scene());
+
     int height = size().height();
-    const int totalWidth = (size().width() + timelineScene()->scrollOffset()) / m_scaling;
-    for (int i = timelineScene()->scrollOffset() / m_scaling; i < totalWidth; ++i) {
+    const int totalWidth = (size().width() + scrollOffset) / m_scaling;
+
+    for (int i = scrollOffset / m_scaling; i < totalWidth; ++i) {
         if ((i % deltaText) == 0) {
             drawCenteredText(painter,
                              TimelineConstants::sectionWidth + i * m_scaling,
@@ -794,11 +800,11 @@ void TimelineBarItem::itemMoved(const QPointF &start, const QPointF &end)
 
     qreal min = qreal(TimelineConstants::sectionWidth + TimelineConstants::timelineLeftOffset
                       - scrollOffset());
-    qreal max = qreal(timelineScene()->rulerWidth() - TimelineConstants::sectionWidth
+    qreal max = qreal(abstractScrollGraphicsScene()->rulerWidth() - TimelineConstants::sectionWidth
                       + rect().width());
 
-    const qreal minFrameX = mapFromFrameToScene(timelineScene()->startFrame());
-    const qreal maxFrameX = mapFromFrameToScene(timelineScene()->endFrame());
+    const qreal minFrameX = mapFromFrameToScene(abstractScrollGraphicsScene()->startFrame() - 1);
+    const qreal maxFrameX = mapFromFrameToScene(abstractScrollGraphicsScene()->endFrame()+ 1000);
 
     if (min < minFrameX)
         min = minFrameX;
@@ -811,7 +817,7 @@ void TimelineBarItem::itemMoved(const QPointF &start, const QPointF &end)
     else
         dragHandle(rect(), end, min, max);
 
-    timelineScene()->statusBarMessageChanged(
+    abstractScrollGraphicsScene()->statusBarMessageChanged(
         tr("Range from %1 to %2")
             .arg(qRound(mapFromSceneToFrame(rect().x())))
             .arg(qRound(mapFromSceneToFrame(rect().width() + rect().x()))));
@@ -975,7 +981,7 @@ void TimelineBarItem::dragCenter(QRectF rect, const QPointF &pos, qreal min, qre
     if (validateBounds(pos.x() - rect.topLeft().x())) {
         qreal targetX = pos.x() - m_pivot;
         if (QApplication::keyboardModifiers() & Qt::ShiftModifier) { // snapping
-            qreal snappedTargetFrame = timelineScene()->snap(mapFromSceneToFrame(targetX));
+            qreal snappedTargetFrame = abstractScrollGraphicsScene()->snap(mapFromSceneToFrame(targetX));
             targetX = mapFromFrameToScene(snappedTargetFrame);
         }
         rect.moveLeft(targetX);
@@ -999,7 +1005,7 @@ void TimelineBarItem::dragHandle(QRectF rect, const QPointF &pos, qreal min, qre
         if (validateBounds(pos.x() - left.topLeft().x())) {
             qreal targetX = pos.x() - m_pivot;
             if (QApplication::keyboardModifiers() & Qt::ShiftModifier) { // snapping
-                qreal snappedTargetFrame = timelineScene()->snap(mapFromSceneToFrame(targetX));
+                qreal snappedTargetFrame = abstractScrollGraphicsScene()->snap(mapFromSceneToFrame(targetX));
                 targetX = mapFromFrameToScene(snappedTargetFrame);
             }
             rect.setLeft(targetX);
@@ -1015,7 +1021,7 @@ void TimelineBarItem::dragHandle(QRectF rect, const QPointF &pos, qreal min, qre
         if (validateBounds(pos.x() - right.topRight().x())) {
             qreal targetX = pos.x() - m_pivot;
             if (QApplication::keyboardModifiers() & Qt::ShiftModifier) { // snapping
-                qreal snappedTargetFrame = timelineScene()->snap(mapFromSceneToFrame(targetX));
+                qreal snappedTargetFrame = abstractScrollGraphicsScene()->snap(mapFromSceneToFrame(targetX));
                 targetX = mapFromFrameToScene(snappedTargetFrame);
             }
             rect.setRight(targetX);

src/plugins/qmldesigner/components/timelineeditor/timelinesectionitem.h

@@ -151,6 +151,7 @@ public:
     static TimelineRulerSectionItem *create(QGraphicsScene *parentScene, TimelineItem *parent);
 
     void invalidateRulerSize(const QmlTimeline &timeline);
+    void invalidateRulerSize(const qreal length);
 
     void setRulerScaleFactor(int scaling);
 

src/plugins/qmldesigner/components/timelineeditor/timelineselectiontool.cpp

@@ -38,7 +38,7 @@
 
 namespace QmlDesigner {
 
-TimelineSelectionTool::TimelineSelectionTool(TimelineGraphicsScene *scene,
+TimelineSelectionTool::TimelineSelectionTool(AbstractScrollGraphicsScene *scene,
                                              TimelineToolDelegate *delegate)
     : TimelineAbstractTool(scene, delegate)
     , m_selectionRect(new QGraphicsRectItem)

src/plugins/qmldesigner/components/timelineeditor/timelineselectiontool.h

@@ -45,7 +45,7 @@ enum class SelectionMode { New, Add, Remove, Toggle };
 class TimelineSelectionTool : public TimelineAbstractTool
 {
 public:
-    explicit TimelineSelectionTool(TimelineGraphicsScene *scene, TimelineToolDelegate *delegate);
+    explicit TimelineSelectionTool(AbstractScrollGraphicsScene *scene, TimelineToolDelegate *delegate);
 
     ~TimelineSelectionTool() override;
 

src/plugins/qmldesigner/components/timelineeditor/timelinetoolbar.cpp

@@ -56,19 +56,19 @@
 
 namespace QmlDesigner {
 
-bool isSpacer(QObject *object)
+static bool isSpacer(QObject *object)
 {
     return object->property("spacer_widget").toBool();
 }
 
-QWidget *createSpacer()
+static QWidget *createSpacer()
 {
     QWidget *spacer = new QWidget();
     spacer->setProperty("spacer_widget", true);
     return spacer;
 }
 
-int controlWidth(QToolBar *bar, QObject *control)
+static int controlWidth(QToolBar *bar, QObject *control)
 {
     QWidget *widget = nullptr;
 
@@ -84,7 +84,7 @@ int controlWidth(QToolBar *bar, QObject *control)
     return 0;
 }
 
-QAction *createAction(const Core::Id &id,
+static QAction *createAction(const Core::Id &id,
                       const QIcon &icon,
                       const QString &name,
                       const QKeySequence &shortcut)

src/plugins/qmldesigner/components/timelineeditor/timelinetooldelegate.cpp

@@ -38,7 +38,7 @@
 
 namespace QmlDesigner {
 
-TimelineToolDelegate::TimelineToolDelegate(TimelineGraphicsScene *scene)
+TimelineToolDelegate::TimelineToolDelegate(AbstractScrollGraphicsScene *scene)
     : m_scene(scene)
     , m_start()
     , m_moveTool(new TimelineMoveTool(scene, this))

src/plugins/qmldesigner/components/timelineeditor/timelinetooldelegate.h

@@ -38,7 +38,7 @@ class TimelineGraphicsScene;
 class TimelineToolDelegate
 {
 public:
-    TimelineToolDelegate(TimelineGraphicsScene* scene);
+    TimelineToolDelegate(AbstractScrollGraphicsScene* scene);
 
     QPointF startPoint() const;
 
@@ -65,7 +65,7 @@ private:
 private:
     static const int dragDistance = 20;
 
-    TimelineGraphicsScene* m_scene;
+    AbstractScrollGraphicsScene* m_scene;
 
     QPointF m_start;
 

src/plugins/qmldesigner/components/transitioneditor/transitioneditor.pri

@@ -0,0 +1,35 @@
+QT *= qml quick core
+
+VPATH += $$PWD
+
+INCLUDEPATH += $$PWD
+
+SOURCES += \
+    transitioneditorview.cpp \
+    transitioneditorwidget.cpp \
+    transitioneditortoolbar.cpp \
+    transitioneditorgraphicsscene.cpp \
+    transitioneditorgraphicslayout.cpp \
+    transitioneditorsectionitem.cpp \
+    transitioneditorpropertyitem.cpp \
+    transitioneditorsettingsdialog.cpp \
+    transitionform.cpp
+
+HEADERS += \
+    transitioneditorconstants \
+    transitioneditorview.h \
+    transitioneditorwidget.h \
+    transitioneditortoolbar.h \
+    transitioneditorgraphicsscene.h \
+    transitioneditorgraphicslayout.h \
+    transitioneditorsectionitem.h \
+    transitioneditorpropertyitem.h \
+    transitioneditorsettingsdialog.h \
+    transitionform.h
+
+RESOURCES += \
+    transitioneditor.qrc
+
+FORMS += \
+    transitioneditorsettingsdialog.ui \
+    transitionform.ui

src/plugins/qmldesigner/components/transitioneditor/transitioneditor.qrc

@@ -0,0 +1,4 @@
+<RCC>
+    <qresource prefix="/transitioneditor">
+    </qresource>
+</RCC>

src/plugins/qmldesigner/components/transitioneditor/transitioneditorconstants.h

@@ -0,0 +1,37 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <QGraphicsItem>
+
+namespace QmlDesigner {
+namespace TransitionEditorConstants {
+
+const int transitionEditorSectionItemUserType = QGraphicsItem::UserType + 6;
+const int transitionEditorPropertyItemUserType = QGraphicsItem::UserType + 7;
+
+} // namespace TransitionEditorConstants
+} // namespace QmlDesigner

src/plugins/qmldesigner/components/transitioneditor/transitioneditorgraphicslayout.cpp

@@ -0,0 +1,172 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "transitioneditorgraphicslayout.h"
+
+#include "timelinegraphicsscene.h"
+#include "timelineplaceholder.h"
+#include "timelinesectionitem.h"
+#include "timelineview.h"
+#include "transitioneditorsectionitem.h"
+
+#include <QGraphicsLinearLayout>
+
+#include <cmath>
+
+namespace QmlDesigner {
+
+TransitionEditorGraphicsLayout::TransitionEditorGraphicsLayout(QGraphicsScene *scene,
+                                                               TimelineItem *parent)
+    : TimelineItem(parent)
+    , m_layout(new QGraphicsLinearLayout)
+    , m_rulerItem(TimelineRulerSectionItem::create(scene, this))
+    , m_placeholder1(TimelinePlaceholder::create(scene, this))
+    , m_placeholder2(TimelinePlaceholder::create(scene, this))
+{
+    m_layout->setOrientation(Qt::Vertical);
+    m_layout->setSpacing(0);
+    m_layout->setContentsMargins(0, 0, 0, 0);
+
+    m_layout->addItem(m_rulerItem);
+    m_layout->addItem(m_placeholder1);
+    m_layout->addItem(m_placeholder2);
+
+    setLayout(m_layout);
+
+    setPos(QPointF(0, 0));
+
+    connect(m_rulerItem,
+            &TimelineRulerSectionItem::rulerClicked,
+            this,
+            &TransitionEditorGraphicsLayout::rulerClicked);
+}
+
+TransitionEditorGraphicsLayout::~TransitionEditorGraphicsLayout() = default;
+
+double TransitionEditorGraphicsLayout::rulerWidth() const
+{
+    return m_rulerItem->preferredWidth();
+}
+
+double TransitionEditorGraphicsLayout::rulerScaling() const
+{
+    return m_rulerItem->rulerScaling();
+}
+
+double TransitionEditorGraphicsLayout::rulerDuration() const
+{
+    return m_rulerItem->rulerDuration();
+}
+
+double TransitionEditorGraphicsLayout::endFrame() const
+{
+    return m_rulerItem->endFrame();
+}
+
+void TransitionEditorGraphicsLayout::setWidth(int width)
+{
+    m_rulerItem->setSizeHints(width);
+    m_placeholder1->setMinimumWidth(width);
+    m_placeholder2->setMinimumWidth(width);
+    setPreferredWidth(width);
+    setMaximumWidth(width);
+}
+
+void TransitionEditorGraphicsLayout::setTransition(const ModelNode &transition)
+{
+    m_layout->removeItem(m_rulerItem);
+    m_layout->removeItem(m_placeholder1);
+    m_layout->removeItem(m_placeholder2);
+
+    m_rulerItem->setParentItem(nullptr);
+    m_placeholder1->setParentItem(nullptr);
+    m_placeholder2->setParentItem(nullptr);
+
+    qDeleteAll(this->childItems());
+
+    m_rulerItem->setParentItem(this);
+
+    qreal duration = 2000;
+    if (transition.isValid() && transition.hasAuxiliaryData("transitionDuration"))
+        duration = transition.auxiliaryData("transitionDuration").toDouble();
+
+    setDuration(duration);
+    m_layout->addItem(m_rulerItem);
+
+    m_placeholder1->setParentItem(this);
+    m_layout->addItem(m_placeholder1);
+
+    m_layout->invalidate();
+
+    if (transition.isValid() && !transition.directSubModelNodes().isEmpty()) {
+        for (const ModelNode &parallel : transition.directSubModelNodes()) {
+            auto item = TransitionEditorSectionItem::create(parallel, this);
+            m_layout->addItem(item);
+        }
+    }
+
+    m_placeholder2->setParentItem(this);
+    m_layout->addItem(m_placeholder2);
+
+    if (auto *scene = timelineScene())
+        if (auto *view = scene->timelineView())
+            if (!transition.isValid() && view->isAttached())
+                emit scaleFactorChanged(0);
+}
+
+void TransitionEditorGraphicsLayout::setDuration(qreal duration)
+{
+    m_rulerItem->invalidateRulerSize(duration);
+}
+
+void TransitionEditorGraphicsLayout::setRulerScaleFactor(int factor)
+{
+    m_rulerItem->setRulerScaleFactor(factor);
+}
+
+void TransitionEditorGraphicsLayout::invalidate()
+{
+    m_layout->invalidate();
+}
+
+int TransitionEditorGraphicsLayout::maximumScrollValue() const
+{
+    const qreal w = this->geometry().width() - qreal(TimelineConstants::sectionWidth);
+    const qreal duration = m_rulerItem->rulerDuration() + m_rulerItem->rulerDuration() * 0.1;
+    const qreal maxr = m_rulerItem->rulerScaling() * duration - w;
+    return std::round(qMax(maxr, 0.0));
+}
+
+void TransitionEditorGraphicsLayout::activate()
+{
+    m_layout->activate();
+}
+
+TimelineRulerSectionItem *TransitionEditorGraphicsLayout::ruler() const
+{
+    return m_rulerItem;
+}
+
+} // End namespace QmlDesigner.

src/plugins/qmldesigner/components/transitioneditor/transitioneditorgraphicslayout.h

@@ -0,0 +1,89 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "timelineitem.h"
+
+QT_FORWARD_DECLARE_CLASS(QGraphicsLinearLayout)
+
+namespace QmlDesigner {
+
+class TimelineItem;
+class TimelineRulerSectionItem;
+class TimelinePlaceholder;
+
+class ModelNode;
+
+class TransitionEditorGraphicsLayout : public TimelineItem
+{
+    Q_OBJECT
+
+signals:
+    void rulerClicked(const QPointF &pos);
+
+    void scaleFactorChanged(int factor);
+
+public:
+    TransitionEditorGraphicsLayout(QGraphicsScene *scene, TimelineItem *parent = nullptr);
+
+    ~TransitionEditorGraphicsLayout() override;
+
+public:
+    double rulerWidth() const;
+
+    double rulerScaling() const;
+
+    double rulerDuration() const;
+
+    double endFrame() const;
+
+    void setWidth(int width);
+
+    void setTransition(const ModelNode &transition);
+
+    void setDuration(qreal duration);
+
+    void setRulerScaleFactor(int factor);
+
+    void invalidate();
+
+    int maximumScrollValue() const;
+
+    void activate();
+
+    TimelineRulerSectionItem *ruler() const;
+
+private:
+    QGraphicsLinearLayout *m_layout = nullptr;
+
+    TimelineRulerSectionItem *m_rulerItem = nullptr;
+
+    TimelinePlaceholder *m_placeholder1 = nullptr;
+
+    TimelinePlaceholder *m_placeholder2 = nullptr;
+};
+
+} // namespace QmlDesigner

src/plugins/qmldesigner/components/transitioneditor/transitioneditorgraphicsscene.cpp

@@ -0,0 +1,431 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "transitioneditorgraphicsscene.h"
+
+#include "transitioneditorgraphicslayout.h"
+#include "transitioneditorpropertyitem.h"
+#include "transitioneditorsectionitem.h"
+#include "transitioneditortoolbar.h"
+#include "transitioneditorview.h"
+#include "transitioneditorwidget.h"
+
+#include "timelineactions.h"
+#include "timelineitem.h"
+#include "timelinemovableabstractitem.h"
+#include "timelinemovetool.h"
+#include "timelineplaceholder.h"
+#include "timelinepropertyitem.h"
+#include "timelinesectionitem.h"
+
+#include <designdocumentview.h>
+#include <exception.h>
+#include <rewritertransaction.h>
+#include <rewriterview.h>
+#include <viewmanager.h>
+#include <qmldesignerplugin.h>
+#include <qmlobjectnode.h>
+#include <qmltimelinekeyframegroup.h>
+
+#include <bindingproperty.h>
+
+#include <nodeabstractproperty.h>
+#include <nodelistproperty.h>
+#include <variantproperty.h>
+
+#include <utils/algorithm.h>
+#include <utils/qtcassert.h>
+
+#include <utils/hostosinfo.h>
+
+#include <QApplication>
+#include <QComboBox>
+#include <QGraphicsLinearLayout>
+#include <QGraphicsProxyWidget>
+#include <QGraphicsSceneMouseEvent>
+#include <QGraphicsView>
+#include <QKeyEvent>
+
+#include <cmath>
+
+namespace QmlDesigner {
+
+static int deleteKey()
+{
+    if (Utils::HostOsInfo::isMacHost())
+        return Qt::Key_Backspace;
+
+    return Qt::Key_Delete;
+}
+
+TransitionEditorGraphicsScene::TransitionEditorGraphicsScene(TransitionEditorWidget *parent)
+    : AbstractScrollGraphicsScene(parent)
+    , m_parent(parent)
+    , m_layout(new TransitionEditorGraphicsLayout(this))
+    , m_tools(this)
+{
+    addItem(m_layout);
+
+    setSceneRect(m_layout->geometry());
+
+    connect(m_layout, &QGraphicsWidget::geometryChanged, this, [this]() {
+        auto rect = m_layout->geometry();
+
+        setSceneRect(rect);
+
+        if (auto *gview = graphicsView())
+            gview->setSceneRect(rect.adjusted(0, TimelineConstants::rulerHeight, 0, 0));
+
+        if (auto *rview = rulerView())
+            rview->setSceneRect(rect);
+    });
+
+    auto changeScale = [this](int factor) {
+        transitionEditorWidget()->changeScaleFactor(factor);
+        setRulerScaling(qreal(factor));
+    };
+    connect(m_layout, &TransitionEditorGraphicsLayout::scaleFactorChanged, changeScale);
+}
+
+TransitionEditorGraphicsScene::~TransitionEditorGraphicsScene()
+{
+    QSignalBlocker block(this);
+    qDeleteAll(items());
+}
+
+void TransitionEditorGraphicsScene::invalidateScrollbar()
+{
+    double max = m_layout->maximumScrollValue();
+    transitionEditorWidget()->setupScrollbar(0, max, scrollOffset());
+    if (scrollOffset() > max)
+        setScrollOffset(max);
+}
+
+void TransitionEditorGraphicsScene::onShow()
+{
+    emit m_layout->scaleFactorChanged(0);
+}
+
+void TransitionEditorGraphicsScene::setTransition(const ModelNode &transition)
+{
+    clearSelection();
+    m_layout->setTransition(transition);
+}
+
+void TransitionEditorGraphicsScene::clearTransition()
+{
+    m_transition = {};
+    m_layout->setTransition({});
+}
+
+void TransitionEditorGraphicsScene::setWidth(int width)
+{
+    m_layout->setWidth(width);
+    invalidateScrollbar();
+}
+
+void TransitionEditorGraphicsScene::invalidateLayout()
+{
+    m_layout->invalidate();
+}
+
+void TransitionEditorGraphicsScene::setDuration(int duration)
+{
+    if (m_transition.isValid())
+        m_transition.setAuxiliaryData("transitionDuration", duration);
+    m_layout->setDuration(duration);
+    qreal scaling = m_layout->rulerScaling();
+    setRulerScaling(scaling);
+}
+
+qreal TransitionEditorGraphicsScene::rulerScaling() const
+{
+    return m_layout->rulerScaling();
+}
+
+int TransitionEditorGraphicsScene::rulerWidth() const
+{
+    return m_layout->rulerWidth();
+}
+
+qreal TransitionEditorGraphicsScene::rulerDuration() const
+{
+    return m_layout->rulerDuration();
+}
+
+qreal TransitionEditorGraphicsScene::endFrame() const
+{
+    return m_layout->endFrame();
+}
+
+qreal TransitionEditorGraphicsScene::startFrame() const
+{
+    return 0;
+}
+
+qreal TransitionEditorGraphicsScene::mapToScene(qreal x) const
+{
+    return TimelineConstants::sectionWidth + TimelineConstants::timelineLeftOffset
+           + (x - startFrame()) * rulerScaling() - scrollOffset();
+}
+
+qreal TransitionEditorGraphicsScene::mapFromScene(qreal x) const
+{
+    auto xPosOffset = (x - TimelineConstants::sectionWidth - TimelineConstants::timelineLeftOffset)
+                      + scrollOffset();
+
+    return xPosOffset / rulerScaling() + startFrame();
+}
+
+void TransitionEditorGraphicsScene::setRulerScaling(int scaleFactor)
+{
+    m_layout->setRulerScaleFactor(scaleFactor);
+
+    setScrollOffset(0);
+    invalidateSections();
+    invalidateScrollbar();
+    update();
+}
+
+void TransitionEditorGraphicsScene::invalidateSectionForTarget(const ModelNode &target)
+{
+    if (!target.isValid())
+        return;
+
+    bool found = false;
+
+    const QList<QGraphicsItem *> items = m_layout->childItems();
+    for (auto child : items)
+        TimelineSectionItem::updateDataForTarget(child, target, &found);
+
+    if (!found)
+        invalidateScene();
+
+    clearSelection();
+    invalidateLayout();
+}
+
+void TransitionEditorGraphicsScene::invalidateScene()
+{
+    invalidateScrollbar();
+}
+
+void TransitionEditorGraphicsScene::invalidateCurrentValues()
+{
+    const QList<QGraphicsItem *> constItems = items();
+    for (auto item : constItems)
+        TimelinePropertyItem::updateTextEdit(item);
+}
+
+QGraphicsView *TransitionEditorGraphicsScene::graphicsView() const
+{
+    const QList<QGraphicsView *> constViews = views();
+    for (auto *v : constViews)
+        if (v->objectName() == "SceneView")
+            return v;
+
+    return nullptr;
+}
+
+QGraphicsView *TransitionEditorGraphicsScene::rulerView() const
+{
+    const QList<QGraphicsView *> constViews = views();
+    for (auto *v : constViews)
+        if (v->objectName() == "RulerView")
+            return v;
+
+    return nullptr;
+}
+
+QRectF TransitionEditorGraphicsScene::selectionBounds() const
+{
+    QRectF bbox;
+
+    return bbox;
+}
+
+void TransitionEditorGraphicsScene::clearSelection()
+{
+    if (m_selectedProperty)
+        m_selectedProperty->update();
+
+    m_selectedProperty = nullptr;
+    AbstractScrollGraphicsScene::clearSelection();
+}
+
+QList<QGraphicsItem *> TransitionEditorGraphicsScene::itemsAt(const QPointF &pos)
+{
+    QTransform transform;
+
+    if (auto *gview = graphicsView())
+        transform = gview->transform();
+
+    return items(pos, Qt::IntersectsItemShape, Qt::DescendingOrder, transform);
+}
+
+void TransitionEditorGraphicsScene::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    auto topItem = TimelineMovableAbstractItem::topMoveableItem(itemsAt(event->scenePos()));
+
+    m_tools.mousePressEvent(topItem, event);
+    QGraphicsScene::mousePressEvent(event);
+}
+
+void TransitionEditorGraphicsScene::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+    auto topItem = TimelineMovableAbstractItem::topMoveableItem(itemsAt(event->scenePos()));
+    m_tools.mouseMoveEvent(topItem, event);
+    QGraphicsScene::mouseMoveEvent(event);
+}
+
+void TransitionEditorGraphicsScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    auto topItem = TimelineMovableAbstractItem::topMoveableItem(itemsAt(event->scenePos()));
+    /* The tool has handle the event last. */
+    QGraphicsScene::mouseReleaseEvent(event);
+    m_tools.mouseReleaseEvent(topItem, event);
+}
+
+void TransitionEditorGraphicsScene::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
+{
+    auto topItem = TimelineMovableAbstractItem::topMoveableItem(itemsAt(event->scenePos()));
+    m_tools.mouseDoubleClickEvent(topItem, event);
+    QGraphicsScene::mouseDoubleClickEvent(event);
+}
+
+void TransitionEditorGraphicsScene::keyPressEvent(QKeyEvent *keyEvent)
+{
+    if (qgraphicsitem_cast<QGraphicsProxyWidget *>(focusItem())) {
+        keyEvent->ignore();
+        QGraphicsScene::keyPressEvent(keyEvent);
+        return;
+    }
+
+    if (keyEvent->modifiers().testFlag(Qt::ControlModifier)) {
+        QGraphicsScene::keyPressEvent(keyEvent);
+    } else {
+        switch (keyEvent->key()) {
+        case Qt::Key_Left:
+            emit scroll(TimelineUtils::Side::Left);
+            keyEvent->accept();
+            break;
+
+        case Qt::Key_Right:
+            emit scroll(TimelineUtils::Side::Right);
+            keyEvent->accept();
+            break;
+
+        default:
+            QGraphicsScene::keyPressEvent(keyEvent);
+            break;
+        }
+    }
+}
+
+void TransitionEditorGraphicsScene::keyReleaseEvent(QKeyEvent *keyEvent)
+{
+    if (qgraphicsitem_cast<QGraphicsProxyWidget *>(focusItem())) {
+        keyEvent->ignore();
+        QGraphicsScene::keyReleaseEvent(keyEvent);
+        return;
+    }
+
+    QGraphicsScene::keyReleaseEvent(keyEvent);
+}
+
+void TransitionEditorGraphicsScene::invalidateSections()
+{
+    const QList<QGraphicsItem *> children = m_layout->childItems();
+    for (auto child : children)
+        TransitionEditorSectionItem::updateData(child);
+
+    clearSelection();
+    invalidateLayout();
+}
+
+TransitionEditorView *TransitionEditorGraphicsScene::transitionEditorView() const
+{
+    return m_parent->transitionEditorView();
+}
+
+TransitionEditorWidget *TransitionEditorGraphicsScene::transitionEditorWidget() const
+{
+    return m_parent;
+}
+
+TransitionEditorToolBar *TransitionEditorGraphicsScene::toolBar() const
+{
+    return transitionEditorWidget()->toolBar();
+}
+
+void TransitionEditorGraphicsScene::activateLayout()
+{
+    m_layout->activate();
+}
+
+AbstractView *TransitionEditorGraphicsScene::abstractView() const
+{
+    return transitionEditorView();
+}
+
+bool TransitionEditorGraphicsScene::event(QEvent *event)
+{
+    switch (event->type()) {
+    case QEvent::ShortcutOverride:
+        if (static_cast<QKeyEvent *>(event)->key() == deleteKey()) {
+            QGraphicsScene::keyPressEvent(static_cast<QKeyEvent *>(event));
+            event->accept();
+            return true;
+        }
+        Q_FALLTHROUGH();
+    default:
+        return QGraphicsScene::event(event);
+    }
+}
+
+ModelNode TransitionEditorGraphicsScene::transitionModelNode() const
+{
+    if (transitionEditorView()->isAttached()) {
+        const QString timelineId = transitionEditorWidget()->toolBar()->currentTransitionId();
+        return transitionEditorView()->modelNodeForId(timelineId);
+    }
+
+    return ModelNode();
+}
+
+TransitionEditorPropertyItem *TransitionEditorGraphicsScene::selectedPropertyItem() const
+{
+    return m_selectedProperty;
+}
+
+void TransitionEditorGraphicsScene::setSelectedPropertyItem(TransitionEditorPropertyItem *item)
+{
+    if (m_selectedProperty)
+        m_selectedProperty->update();
+    m_selectedProperty = item;
+    emit selectionChanged();
+}
+
+} // namespace QmlDesigner

src/plugins/qmldesigner/components/transitioneditor/transitioneditorgraphicsscene.h

@@ -0,0 +1,146 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+
+#include <timelineeditor/timelinegraphicsscene.h>
+
+#include <qmltimeline.h>
+
+#include <QGraphicsScene>
+
+#include <memory>
+
+QT_FORWARD_DECLARE_CLASS(QGraphicsLinearLayout)
+QT_FORWARD_DECLARE_CLASS(QComboBox)
+
+namespace QmlDesigner {
+
+class TransitionEditorView;
+class TransitionEditorWidget;
+class TransitionEditorToolBar;
+class TransitionEditorGraphicsLayout;
+
+class TimelineRulerSectionItem;
+class TimelineFrameHandle;
+class TimelineAbstractTool;
+class TimelineMoveTool;
+class TimelineKeyframeItem;
+class TimelinePlaceholder;
+class TimelineToolBar;
+class TransitionEditorPropertyItem;
+
+class TransitionEditorGraphicsScene : public AbstractScrollGraphicsScene
+{
+    Q_OBJECT
+
+signals:
+    void selectionChanged();
+
+    void scroll(const TimelineUtils::Side &side);
+
+public:
+    explicit TransitionEditorGraphicsScene(TransitionEditorWidget *parent);
+
+    ~TransitionEditorGraphicsScene() override;
+
+    void onShow();
+
+    void setTransition(const ModelNode &transition);
+    void clearTransition();
+
+    void setWidth(int width);
+
+    void invalidateLayout();
+    void setDuration(int duration);
+
+    TransitionEditorView *transitionEditorView() const;
+    TransitionEditorWidget *transitionEditorWidget() const;
+    TransitionEditorToolBar *toolBar() const;
+
+    qreal rulerScaling() const override;
+    int rulerWidth() const override;
+    qreal rulerDuration() const override;
+    qreal endFrame() const override;
+    qreal startFrame() const override;
+
+    qreal mapToScene(qreal x) const;
+    qreal mapFromScene(qreal x) const;
+
+    void setRulerScaling(int scaling);
+
+    void invalidateSectionForTarget(const ModelNode &modelNode);
+
+    void invalidateScene();
+    void invalidateCurrentValues();
+    void invalidateRecordButtonsStatus();
+
+    QGraphicsView *graphicsView() const;
+    QGraphicsView *rulerView() const;
+
+    QRectF selectionBounds() const;
+
+    void selectKeyframes(const SelectionMode &mode, const QList<TimelineKeyframeItem *> &items);
+    void clearSelection() override;
+
+    void activateLayout();
+
+    AbstractView *abstractView() const override;
+    ModelNode transitionModelNode() const;
+
+    TransitionEditorPropertyItem *selectedPropertyItem() const;
+    void setSelectedPropertyItem(TransitionEditorPropertyItem *item);
+
+    void invalidateScrollbar() override;
+
+signals:
+    void statusBarMessageChanged(const QString &message);
+
+protected:
+    bool event(QEvent *event) override;
+    void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
+    void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
+    void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event) override;
+
+    void keyPressEvent(QKeyEvent *keyEvent) override;
+    void keyReleaseEvent(QKeyEvent *keyEvent) override;
+
+private:
+    void invalidateSections();
+    QList<QGraphicsItem *> itemsAt(const QPointF &pos);
+
+private:
+    TransitionEditorWidget *m_parent = nullptr;
+    TransitionEditorGraphicsLayout *m_layout = nullptr;
+    ModelNode m_transition;
+
+    int m_scrollOffset = 0;
+    TimelineToolDelegate m_tools;
+    TransitionEditorPropertyItem *m_selectedProperty = nullptr;
+};
+
+} // namespace QmlDesigner

src/plugins/qmldesigner/components/transitioneditor/transitioneditorpropertyitem.cpp

@@ -0,0 +1,237 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "transitioneditorpropertyitem.h"
+
+#include "abstractview.h"
+#include "timelineconstants.h"
+#include "timelineicons.h"
+#include "transitioneditorgraphicsscene.h"
+
+#include <bindingproperty.h>
+#include <nodeabstractproperty.h>
+#include <rewritertransaction.h>
+#include <rewritingexception.h>
+#include <theme.h>
+#include <variantproperty.h>
+#include <qmlobjectnode.h>
+
+#include <coreplugin/icore.h>
+#include <utils/qtcassert.h>
+#include <utils/utilsicons.h>
+
+#include <utils/algorithm.h>
+#include <utils/fileutils.h>
+
+#include <coreplugin/icore.h>
+
+#include <QCursor>
+#include <QGraphicsProxyWidget>
+#include <QGraphicsSceneMouseEvent>
+#include <QGraphicsView>
+#include <QLineEdit>
+#include <QMenu>
+#include <QPainter>
+
+#include <algorithm>
+
+namespace QmlDesigner {
+
+TransitionEditorPropertyItem *TransitionEditorPropertyItem::create(
+    const ModelNode &animation, TransitionEditorSectionItem *parent)
+{
+    auto item = new TransitionEditorPropertyItem(parent);
+    item->m_animation = animation;
+
+    auto sectionItem = new QGraphicsWidget(item);
+
+    sectionItem->setGeometry(0,
+                             0,
+                             TimelineConstants::sectionWidth,
+                             TimelineConstants::sectionHeight);
+
+    sectionItem->setZValue(10);
+    sectionItem->setCursor(Qt::ArrowCursor);
+
+    item->setToolTip(item->propertyName());
+    item->resize(parent->size());
+
+    item->m_barItem = new TransitionEditorBarItem(item);
+    item->invalidateBar();
+
+    return item;
+}
+
+int TransitionEditorPropertyItem::type() const
+{
+    return Type;
+}
+
+void TransitionEditorPropertyItem::updateData()
+{
+    invalidateBar();
+}
+
+void TransitionEditorPropertyItem::updateParentData()
+{
+    TransitionEditorSectionItem::invalidateBar(parentItem());
+}
+
+bool TransitionEditorPropertyItem::isSelected() const
+{
+    return transitionEditorGraphicsScene()->selectedPropertyItem() == this;
+}
+
+QString TransitionEditorPropertyItem::propertyName() const
+{
+    if (m_animation.isValid()) {
+        const QString propertyName = m_animation.variantProperty("property").value().toString();
+        if (!propertyName.isEmpty())
+            return propertyName;
+        return m_animation.variantProperty("properties").value().toString();
+    }
+    return QString();
+}
+
+void TransitionEditorPropertyItem::paint(QPainter *painter,
+                                         const QStyleOptionGraphicsItem *,
+                                         QWidget *)
+{
+    painter->save();
+
+    static const QColor penColor = Theme::instance()->qmlDesignerBackgroundColorDarker();
+    static const QColor textColor = Theme::getColor(Theme::PanelTextColorLight);
+    static const QColor backgroundColor = Theme::instance()
+                                              ->qmlDesignerBackgroundColorDarkAlternate();
+
+    painter->fillRect(0, 0, TimelineConstants::sectionWidth, size().height(), backgroundColor);
+    painter->fillRect(TimelineConstants::textIndentationProperties - 4,
+                      0,
+                      TimelineConstants::sectionWidth - TimelineConstants::textIndentationProperties
+                          + 4,
+                      size().height(),
+                      backgroundColor.darker(110));
+
+    painter->setPen(penColor);
+
+    drawLine(painter,
+             TimelineConstants::sectionWidth - 1,
+             0,
+             TimelineConstants::sectionWidth - 1,
+             size().height());
+
+    drawLine(painter,
+             TimelineConstants::textIndentationProperties - 4,
+             TimelineConstants::sectionHeight - 1,
+             size().width(),
+             TimelineConstants::sectionHeight - 1);
+
+    painter->setPen(textColor);
+
+    const QFontMetrics metrics(font());
+
+    const QString elidedText = metrics.elidedText(propertyName(),
+                                                  Qt::ElideMiddle,
+                                                  qreal(TimelineConstants::sectionWidth) * 2.0 / 3
+                                                      - TimelineConstants::textIndentationProperties,
+                                                  0);
+
+    painter->drawText(TimelineConstants::textIndentationProperties, 12, elidedText);
+
+    painter->restore();
+}
+
+void TransitionEditorPropertyItem::contextMenuEvent(QGraphicsSceneContextMenuEvent * /*event */) {}
+
+TransitionEditorPropertyItem::TransitionEditorPropertyItem(TransitionEditorSectionItem *parent)
+    : TimelineItem(parent)
+{
+    setPreferredHeight(TimelineConstants::sectionHeight);
+    setMinimumHeight(TimelineConstants::sectionHeight);
+    setMaximumHeight(TimelineConstants::sectionHeight);
+}
+
+TransitionEditorGraphicsScene *TransitionEditorPropertyItem::transitionEditorGraphicsScene() const
+{
+    return qobject_cast<TransitionEditorGraphicsScene *>(scene());
+}
+
+void TransitionEditorPropertyItem::invalidateBar()
+{
+    qreal min = 0;
+    qreal max = 0;
+
+    QTC_ASSERT(m_animation.isValid(), return );
+    QTC_ASSERT(m_animation.hasParentProperty(), return );
+
+    const ModelNode parent = m_animation.parentProperty().parentModelNode();
+
+    for (const ModelNode &child : parent.directSubModelNodes())
+        if (child.hasMetaInfo() && child.isSubclassOf("QtQuick.PauseAnimation"))
+            min = child.variantProperty("duration").value().toDouble();
+
+    max = m_animation.variantProperty("duration").value().toDouble() + min;
+
+    const qreal sceneMin = m_barItem->mapFromFrameToScene(min);
+
+    QRectF barRect(sceneMin,
+                   0,
+                   (max - min) * m_barItem->rulerScaling(),
+                   TimelineConstants::sectionHeight - 1);
+
+    m_barItem->setRect(barRect);
+}
+
+AbstractView *TransitionEditorPropertyItem::view() const
+{
+    return m_animation.view();
+}
+
+ModelNode TransitionEditorPropertyItem::propertyAnimation() const
+{
+    return m_animation;
+}
+
+ModelNode TransitionEditorPropertyItem::pauseAnimation() const
+{
+    QTC_ASSERT(m_animation.isValid(), return {});
+    QTC_ASSERT(m_animation.hasParentProperty(), return {});
+
+    const ModelNode parent = m_animation.parentProperty().parentModelNode();
+
+    for (const ModelNode &child : parent.directSubModelNodes())
+        if (child.hasMetaInfo() && child.isSubclassOf("QtQuick.PauseAnimation"))
+            return child;
+
+    return {};
+}
+
+void TransitionEditorPropertyItem::select()
+{
+    transitionEditorGraphicsScene()->setSelectedPropertyItem(this);
+    m_barItem->update();
+}
+
+} // namespace QmlDesigner

src/plugins/qmldesigner/components/transitioneditor/transitioneditorpropertyitem.h

@@ -0,0 +1,73 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "transitioneditorsectionitem.h"
+
+#include <modelnode.h>
+
+#include <QGraphicsRectItem>
+
+QT_FORWARD_DECLARE_CLASS(QLineEdit)
+
+namespace QmlDesigner {
+
+class TransitionEditorGraphicsScene;
+
+class TransitionEditorPropertyItem : public TimelineItem
+{
+    Q_OBJECT
+
+public:
+    enum { Type = TransitionEditorConstants::transitionEditorPropertyItemUserType };
+
+    static TransitionEditorPropertyItem *create(const ModelNode &animation,
+                                        TransitionEditorSectionItem *parent = nullptr);
+    int type() const override;
+    void updateData();
+    void updateParentData();
+
+    bool isSelected() const;
+    QString propertyName() const;
+    void invalidateBar();
+    AbstractView *view() const;
+    ModelNode propertyAnimation() const;
+    ModelNode pauseAnimation() const;
+    void select();
+
+protected:
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
+    void contextMenuEvent(QGraphicsSceneContextMenuEvent *event) override;
+
+private:
+    TransitionEditorPropertyItem(TransitionEditorSectionItem *parent = nullptr);
+    TransitionEditorGraphicsScene *transitionEditorGraphicsScene() const;
+
+    ModelNode m_animation;
+    TransitionEditorBarItem *m_barItem;
+};
+
+} // namespace QmlDesigner

src/plugins/qmldesigner/components/transitioneditor/transitioneditorsectionitem.cpp

@@ -0,0 +1,803 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "transitioneditorsectionitem.h"
+#include "transitioneditorgraphicsscene.h"
+#include "transitioneditorpropertyitem.h"
+
+#include "timelineactions.h"
+#include "timelineconstants.h"
+#include "timelineicons.h"
+#include "timelinepropertyitem.h"
+#include "timelineutils.h"
+
+#include <abstractview.h>
+#include <bindingproperty.h>
+#include <variantproperty.h>
+#include <qmltimeline.h>
+#include <qmltimelinekeyframegroup.h>
+
+#include <rewritingexception.h>
+
+#include <theme.h>
+
+#include <utils/qtcassert.h>
+
+#include <QAction>
+#include <QApplication>
+#include <QColorDialog>
+#include <QGraphicsScene>
+#include <QGraphicsSceneMouseEvent>
+#include <QGraphicsView>
+#include <QHBoxLayout>
+#include <QMenu>
+#include <QPainter>
+#include <QPainterPath>
+
+#include <QGraphicsView>
+
+#include <QDebug>
+
+#include <cmath>
+#include <limits>
+
+namespace QmlDesigner {
+
+static void scaleDuration(const ModelNode &node, qreal s)
+{
+    if (node.hasVariantProperty("duration")) {
+        qreal old = node.variantProperty("duration").value().toDouble();
+        node.variantProperty("duration").setValue(qRound(old * s));
+    }
+}
+
+static void moveDuration(const ModelNode &node, qreal s)
+{
+    if (node.hasVariantProperty("duration")) {
+        qreal old = node.variantProperty("duration").value().toDouble();
+        node.variantProperty("duration").setValue(old + s);
+    }
+}
+
+class ClickDummy : public TimelineItem
+{
+public:
+    explicit ClickDummy(TransitionEditorSectionItem *parent)
+        : TimelineItem(parent)
+    {
+        setGeometry(0, 0, TimelineConstants::sectionWidth, TimelineConstants::sectionHeight);
+
+        setZValue(10);
+        setCursor(Qt::ArrowCursor);
+    }
+
+protected:
+    void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event) override
+    {
+        scene()->sendEvent(parentItem(), event);
+    }
+    void mousePressEvent(QGraphicsSceneMouseEvent *event) override
+    {
+        scene()->sendEvent(parentItem(), event);
+    }
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override
+    {
+        scene()->sendEvent(parentItem(), event);
+    }
+    void contextMenuEvent(QGraphicsSceneContextMenuEvent *event) override
+    {
+        scene()->sendEvent(parentItem(), event);
+    }
+};
+
+TransitionEditorSectionItem::TransitionEditorSectionItem(TimelineItem *parent)
+    : TimelineItem(parent)
+{}
+
+TransitionEditorSectionItem *TransitionEditorSectionItem::create(const ModelNode &animation,
+                                                                 TimelineItem *parent)
+{
+    auto item = new TransitionEditorSectionItem(parent);
+
+    ModelNode target;
+
+    if (animation.isValid()) {
+        const QList<ModelNode> propertyAnimations = animation.subModelNodesOfType(
+            "QtQuick.PropertyAnimation");
+
+        for (const ModelNode &child : propertyAnimations) {
+            if (child.hasBindingProperty("target"))
+                target = child.bindingProperty("target").resolveToModelNode();
+        }
+    }
+
+    item->m_targetNode = target;
+    item->m_animationNode = animation;
+    item->createPropertyItems();
+
+    if (target.isValid())
+        item->setToolTip(target.id());
+
+    item->m_dummyItem = new ClickDummy(item);
+    item->m_dummyItem->update();
+
+    item->m_barItem = new TransitionEditorBarItem(item);
+    item->invalidateBar();
+    item->invalidateHeight();
+
+    return item;
+}
+
+void TransitionEditorSectionItem::invalidateBar()
+{
+    qreal min = std::numeric_limits<qreal>::max();
+    qreal max = 0;
+
+    if (!m_animationNode.isValid())
+        return;
+
+    for (const ModelNode &sequential : m_animationNode.directSubModelNodes()) {
+        qreal locMin = 0;
+        qreal locMax = 0;
+
+        for (const ModelNode &child : sequential.directSubModelNodes()) {
+            if (child.hasMetaInfo() && child.isSubclassOf("QtQuick.PropertyAnimation"))
+                locMax = child.variantProperty("duration").value().toDouble();
+            else if (child.hasMetaInfo() && child.isSubclassOf("QtQuick.PauseAnimation"))
+                locMin = child.variantProperty("duration").value().toDouble();
+        }
+
+        locMax = locMax + locMin;
+
+        min = qMin(min, locMin);
+        max = qMax(max, locMax);
+    }
+
+    const qreal sceneMin = m_barItem->mapFromFrameToScene(min);
+
+    QRectF barRect(sceneMin,
+                   0,
+                   (max - min) * m_barItem->rulerScaling(),
+                   TimelineConstants::sectionHeight - 1);
+
+    m_barItem->setRect(barRect);
+}
+
+int TransitionEditorSectionItem::type() const
+{
+    return Type;
+}
+
+void TransitionEditorSectionItem::updateData(QGraphicsItem *item)
+{
+    if (auto sectionItem = qgraphicsitem_cast<TransitionEditorSectionItem *>(item))
+        sectionItem->updateData();
+}
+
+void TransitionEditorSectionItem::invalidateBar(QGraphicsItem *item)
+{
+    if (auto sectionItem = qgraphicsitem_cast<TransitionEditorSectionItem *>(item))
+        sectionItem->invalidateBar();
+}
+
+void TransitionEditorSectionItem::updateDataForTarget(QGraphicsItem *item,
+                                                      const ModelNode &target,
+                                                      bool *b)
+{
+    if (!target.isValid())
+        return;
+
+    if (auto sectionItem = qgraphicsitem_cast<TransitionEditorSectionItem *>(item)) {
+        if (sectionItem->m_targetNode == target) { //TODO update animation node
+            sectionItem->updateData();
+            if (b)
+                *b = true;
+        }
+    }
+}
+
+void TransitionEditorSectionItem::moveAllDurations(qreal offset)
+{
+    for (const ModelNode &sequential : m_animationNode.directSubModelNodes()) {
+        for (const ModelNode &child : sequential.directSubModelNodes()) {
+            if (child.hasMetaInfo() && child.isSubclassOf("QtQuick.PauseAnimation"))
+                moveDuration(child, offset);
+        }
+    }
+}
+
+void TransitionEditorSectionItem::scaleAllDurations(qreal scale)
+{
+    for (const ModelNode &sequential : m_animationNode.directSubModelNodes()) {
+        for (const ModelNode &child : sequential.directSubModelNodes()) {
+            if (child.hasMetaInfo() && child.isSubclassOf("QtQuick.PropertyAnimation"))
+                scaleDuration(child, scale);
+        }
+    }
+}
+
+qreal TransitionEditorSectionItem::firstFrame()
+{
+    return 0;
+    //if (!m_timeline.isValid())
+    //return 0;
+
+    //return m_timeline.minActualKeyframe(m_targetNode);
+}
+
+AbstractView *TransitionEditorSectionItem::view() const
+{
+    return m_animationNode.view();
+}
+
+bool TransitionEditorSectionItem::isSelected() const
+{
+    return m_targetNode.isValid() && m_targetNode.isSelected();
+}
+
+ModelNode TransitionEditorSectionItem::targetNode() const
+{
+    return m_targetNode;
+}
+
+static QPixmap rotateby90(const QPixmap &pixmap)
+{
+    QImage sourceImage = pixmap.toImage();
+    QImage destImage(pixmap.height(), pixmap.width(), sourceImage.format());
+
+    for (int x = 0; x < pixmap.width(); x++)
+        for (int y = 0; y < pixmap.height(); y++)
+            destImage.setPixel(y, x, sourceImage.pixel(x, y));
+
+    QPixmap result = QPixmap::fromImage(destImage);
+
+    result.setDevicePixelRatio(pixmap.devicePixelRatio());
+
+    return result;
+}
+
+static int devicePixelHeight(const QPixmap &pixmap)
+{
+    return pixmap.height() / pixmap.devicePixelRatioF();
+}
+
+void TransitionEditorSectionItem::paint(QPainter *painter,
+                                        const QStyleOptionGraphicsItem * /*option*/,
+                                        QWidget *)
+{
+    if (m_targetNode.isValid()) {
+        painter->save();
+
+        const QColor textColor = Theme::getColor(Theme::PanelTextColorLight);
+        const QColor penColor = Theme::instance()->qmlDesignerBackgroundColorDarker();
+        QColor brushColor = Theme::getColor(Theme::BackgroundColorDark);
+
+        int fillOffset = 0;
+        if (isSelected()) {
+            brushColor = Theme::getColor(Theme::QmlDesigner_HighlightColor);
+            fillOffset = 1;
+        }
+
+        painter->fillRect(0,
+                          0,
+                          TimelineConstants::sectionWidth,
+                          TimelineConstants::sectionHeight - fillOffset,
+                          brushColor);
+        painter->fillRect(TimelineConstants::sectionWidth,
+                          0,
+                          size().width() - TimelineConstants::sectionWidth,
+                          size().height(),
+                          Theme::instance()->qmlDesignerBackgroundColorDarkAlternate());
+
+        painter->setPen(penColor);
+        drawLine(painter,
+                 TimelineConstants::sectionWidth - 1,
+                 0,
+                 TimelineConstants::sectionWidth - 1,
+                 size().height() - 1);
+        drawLine(painter,
+                 TimelineConstants::sectionWidth,
+                 TimelineConstants::sectionHeight - 1,
+                 size().width(),
+                 TimelineConstants::sectionHeight - 1);
+
+        static const QPixmap arrow = Theme::getPixmap("down-arrow");
+
+        static const QPixmap arrow90 = rotateby90(arrow);
+
+        const QPixmap rotatedArrow = collapsed() ? arrow90 : arrow;
+
+        const int textOffset = QFontMetrics(font()).ascent()
+                               + (TimelineConstants::sectionHeight - QFontMetrics(font()).height())
+                                     / 2;
+
+        painter->drawPixmap(collapsed() ? 6 : 4,
+                            (TimelineConstants::sectionHeight - devicePixelHeight(rotatedArrow)) / 2,
+                            rotatedArrow);
+
+        painter->setPen(textColor);
+
+        QFontMetrics fm(painter->font());
+        const QString elidedId = fm.elidedText(m_targetNode.id(),
+                                               Qt::ElideMiddle,
+                                               TimelineConstants::sectionWidth
+                                                   - TimelineConstants::textIndentationSections);
+        painter->drawText(TimelineConstants::textIndentationSections, textOffset, elidedId);
+
+        painter->restore();
+    }
+}
+
+void TransitionEditorSectionItem::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (event->pos().y() > TimelineConstants::sectionHeight
+        || event->pos().x() < TimelineConstants::textIndentationSections) {
+        TimelineItem::mouseDoubleClickEvent(event);
+        return;
+    }
+
+    if (event->button() == Qt::LeftButton) {
+        event->accept();
+        toggleCollapsed();
+    }
+}
+
+void TransitionEditorSectionItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (event->pos().y() > TimelineConstants::sectionHeight) {
+        TimelineItem::mousePressEvent(event);
+        return;
+    }
+
+    if (event->button() == Qt::LeftButton)
+        event->accept();
+}
+
+void TransitionEditorSectionItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (event->pos().y() > TimelineConstants::sectionHeight) {
+        TimelineItem::mouseReleaseEvent(event);
+        return;
+    }
+
+    if (event->button() != Qt::LeftButton)
+        return;
+
+    event->accept();
+
+    if (event->pos().x() > TimelineConstants::textIndentationSections
+        && event->button() == Qt::LeftButton) {
+        if (m_targetNode.isValid())
+            m_targetNode.view()->setSelectedModelNode(m_targetNode);
+    } else {
+        toggleCollapsed();
+    }
+    update();
+}
+
+void TransitionEditorSectionItem::resizeEvent(QGraphicsSceneResizeEvent *event)
+{
+    TimelineItem::resizeEvent(event);
+
+    for (auto child : propertyItems()) {
+        TransitionEditorPropertyItem *item = static_cast<TransitionEditorPropertyItem *>(child);
+        item->resize(size().width(), TimelineConstants::sectionHeight);
+    }
+}
+
+void TransitionEditorSectionItem::contextMenuEvent(QGraphicsSceneContextMenuEvent *) {}
+
+void TransitionEditorSectionItem::updateData()
+{
+    invalidateBar();
+    resize(rulerWidth(), size().height());
+    invalidateProperties();
+    update();
+}
+
+const QList<QGraphicsItem *> TransitionEditorSectionItem::propertyItems() const
+{
+    QList<QGraphicsItem *> list;
+
+    const QList<QGraphicsItem *> children = childItems();
+    for (auto child : children) {
+        if (m_barItem != child && m_dummyItem != child)
+            list.append(child);
+    }
+
+    return list;
+}
+
+void TransitionEditorSectionItem::invalidateHeight()
+{
+    int height = 0;
+    bool visible = true;
+
+    if (collapsed()) {
+        height = TimelineConstants::sectionHeight;
+        visible = false;
+    } else {
+        const QList<ModelNode> propertyAnimations = m_animationNode.subModelNodesOfType(
+            "QtQuick.PropertyAnimation");
+
+        height = TimelineConstants::sectionHeight
+                 + propertyAnimations.count() * TimelineConstants::sectionHeight;
+        visible = true;
+    }
+
+    for (auto child : propertyItems())
+        child->setVisible(visible);
+
+    setPreferredHeight(height);
+    setMinimumHeight(height);
+    setMaximumHeight(height);
+
+    auto transitionScene = qobject_cast<TransitionEditorGraphicsScene *>(scene());
+    transitionScene->activateLayout();
+}
+
+void TransitionEditorSectionItem::createPropertyItems()
+{
+    int yPos = TimelineConstants::sectionHeight;
+    const QList<ModelNode> propertyAnimations = m_animationNode.subModelNodesOfType(
+        "QtQuick.PropertyAnimation");
+    for (const auto &anim : propertyAnimations) {
+        auto item = TransitionEditorPropertyItem::create(anim, this);
+        item->setY(yPos);
+        yPos = yPos + TimelineConstants::sectionHeight;
+    }
+}
+
+void TransitionEditorSectionItem::invalidateProperties()
+{
+    for (auto child : propertyItems()) {
+        delete child;
+    }
+
+    createPropertyItems();
+
+    for (auto child : propertyItems()) {
+        TransitionEditorPropertyItem *item = static_cast<TransitionEditorPropertyItem *>(child);
+        item->updateData();
+        item->resize(size().width(), TimelineConstants::sectionHeight);
+    }
+    invalidateHeight();
+}
+
+bool TransitionEditorSectionItem::collapsed() const
+{
+    return m_targetNode.isValid() && !m_targetNode.hasAuxiliaryData("timeline_expanded");
+}
+
+qreal TransitionEditorSectionItem::rulerWidth() const
+{
+    return static_cast<TimelineGraphicsScene *>(scene())->rulerWidth();
+}
+
+void TransitionEditorSectionItem::toggleCollapsed()
+{
+    QTC_ASSERT(m_targetNode.isValid(), return );
+
+    if (collapsed())
+        m_targetNode.setAuxiliaryData("timeline_expanded", true);
+    else
+        m_targetNode.removeAuxiliaryData("timeline_expanded");
+
+    invalidateHeight();
+}
+
+TransitionEditorBarItem::TransitionEditorBarItem(TransitionEditorSectionItem *parent)
+    : TimelineMovableAbstractItem(parent)
+{
+    setAcceptHoverEvents(true);
+    setPen(Qt::NoPen);
+}
+
+TransitionEditorBarItem::TransitionEditorBarItem(TransitionEditorPropertyItem *parent)
+    : TimelineMovableAbstractItem(parent)
+{
+    setAcceptHoverEvents(true);
+    setPen(Qt::NoPen);
+}
+
+void TransitionEditorBarItem::itemMoved(const QPointF &start, const QPointF &end)
+{
+    if (isActiveHandle(Location::Undefined))
+        dragInit(rect(), start);
+
+    qreal min = qreal(TimelineConstants::sectionWidth + TimelineConstants::timelineLeftOffset
+                      - scrollOffset());
+    qreal max = qreal(abstractScrollGraphicsScene()->rulerWidth() - TimelineConstants::sectionWidth
+                      + rect().width());
+
+    const qreal minFrameX = mapFromFrameToScene(abstractScrollGraphicsScene()->startFrame());
+    const qreal maxFrameX = mapFromFrameToScene(abstractScrollGraphicsScene()->endFrame());
+
+    if (min < minFrameX)
+        min = minFrameX;
+
+    if (max > maxFrameX)
+        max = maxFrameX;
+
+    if (isActiveHandle(Location::Center))
+        dragCenter(rect(), end, min, max);
+    else
+        dragHandle(rect(), end, min, max);
+
+    emit abstractScrollGraphicsScene()->statusBarMessageChanged(
+        tr("Range from %1 to %2")
+            .arg(qRound(mapFromSceneToFrame(rect().x())))
+            .arg(qRound(mapFromSceneToFrame(rect().width() + rect().x()))));
+}
+
+void TransitionEditorBarItem::commitPosition(const QPointF & /*point*/)
+{
+    if (sectionItem() && sectionItem()->view()) {
+        if (m_handle != Location::Undefined) {
+            sectionItem()
+                ->view()
+                ->executeInTransaction("TransitionEditorBarItem::commitPosition", [this]() {
+                    qreal scaleFactor = rect().width() / m_oldRect.width();
+
+                    qreal moved = (rect().topLeft().x() - m_oldRect.topLeft().x()) / rulerScaling();
+                    qreal supposedFirstFrame = qRound(moved);
+
+                    sectionItem()->scaleAllDurations(scaleFactor);
+                    sectionItem()->moveAllDurations(supposedFirstFrame);
+                    sectionItem()->updateData();
+                });
+        }
+    } else if (propertyItem() && propertyItem()->view()) {
+        if (m_handle != Location::Undefined) {
+            propertyItem()
+                ->view()
+                ->executeInTransaction("TransitionEditorBarItem::commitPosition", [this]() {
+                    qreal scaleFactor = rect().width() / m_oldRect.width();
+                    qreal moved = (rect().topLeft().x() - m_oldRect.topLeft().x()) / rulerScaling();
+                    qreal supposedFirstFrame = qRound(moved);
+                    scaleDuration(propertyItem()->propertyAnimation(), scaleFactor);
+                    moveDuration(propertyItem()->pauseAnimation(), supposedFirstFrame);
+                    propertyItem()->updateData();
+                    propertyItem()->updateParentData();
+                });
+        }
+    }
+
+    m_handle = Location::Undefined;
+    m_bounds = Location::Undefined;
+    m_pivot = 0.0;
+    m_oldRect = QRectF();
+    scrollOffsetChanged();
+}
+
+void TransitionEditorBarItem::scrollOffsetChanged()
+{
+    if (sectionItem())
+        sectionItem()->invalidateBar();
+    else if (propertyItem())
+        propertyItem()->invalidateBar();
+}
+
+void TransitionEditorBarItem::paint(QPainter *painter,
+                                    const QStyleOptionGraphicsItem *option,
+                                    QWidget *widget)
+{
+    Q_UNUSED(option)
+    Q_UNUSED(widget)
+
+    QColor brushColor = Theme::getColor(Theme::QmlDesigner_HighlightColor);
+    QColor brushColorSection = Theme::getColor(Theme::QmlDesigner_HighlightColor).darker(120);
+    QColor penColor = Theme::getColor(Theme::QmlDesigner_HighlightColor).lighter(140);
+
+    const QRectF itemRect = rect();
+
+    painter->save();
+    painter->setClipRect(TimelineConstants::sectionWidth,
+                         0,
+                         itemRect.width() + itemRect.x(),
+                         itemRect.height());
+
+    if (sectionItem())
+        painter->fillRect(itemRect, brushColorSection);
+    else
+        painter->fillRect(itemRect, brushColor);
+
+    if (propertyItem() && propertyItem()->isSelected()) {
+        painter->setPen(penColor);
+        painter->drawRect(itemRect.adjusted(0, 0, 0, -1));
+    }
+
+    painter->restore();
+}
+
+void TransitionEditorBarItem::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
+{
+    const auto p = event->pos();
+
+    QRectF left, right;
+    if (handleRects(rect(), left, right)) {
+        if (left.contains(p) || right.contains(p)) {
+            if (cursor().shape() != Qt::SizeHorCursor)
+                setCursor(QCursor(Qt::SizeHorCursor));
+        } else if (rect().contains(p)) {
+            if (cursor().shape() != Qt::ClosedHandCursor)
+                setCursor(QCursor(Qt::ClosedHandCursor));
+        }
+    } else {
+        if (rect().contains(p))
+            setCursor(QCursor(Qt::ClosedHandCursor));
+    }
+}
+
+void TransitionEditorBarItem::contextMenuEvent(QGraphicsSceneContextMenuEvent * /*event*/) {}
+
+void TransitionEditorBarItem::mousePressEvent(QGraphicsSceneMouseEvent * /*event*/)
+{
+    if (propertyItem())
+        propertyItem()->select();
+}
+
+TransitionEditorSectionItem *TransitionEditorBarItem::sectionItem() const
+{
+    return qgraphicsitem_cast<TransitionEditorSectionItem *>(parentItem());
+}
+
+TransitionEditorPropertyItem *TransitionEditorBarItem::propertyItem() const
+{
+    return qgraphicsitem_cast<TransitionEditorPropertyItem *>(parentItem());
+}
+
+void TransitionEditorBarItem::dragInit(const QRectF &rect, const QPointF &pos)
+{
+    QRectF left, right;
+    m_oldRect = rect;
+    if (handleRects(rect, left, right)) {
+        if (left.contains(pos)) {
+            m_handle = Location::Left;
+            m_pivot = pos.x() - left.topLeft().x();
+        } else if (right.contains(pos)) {
+            m_handle = Location::Right;
+            m_pivot = pos.x() - right.topRight().x();
+        } else if (rect.contains(pos)) {
+            m_handle = Location::Center;
+            m_pivot = pos.x() - rect.topLeft().x();
+        }
+
+    } else {
+        if (rect.contains(pos)) {
+            m_handle = Location::Center;
+            m_pivot = pos.x() - rect.topLeft().x();
+        }
+    }
+}
+
+void TransitionEditorBarItem::dragCenter(QRectF rect, const QPointF &pos, qreal min, qreal max)
+{
+    if (validateBounds(pos.x() - rect.topLeft().x())) {
+        qreal targetX = pos.x() - m_pivot;
+
+        if (QApplication::keyboardModifiers() & Qt::ShiftModifier) { // snapping
+            qreal snappedTargetFrame = abstractScrollGraphicsScene()->snap(mapFromSceneToFrame(targetX));
+            targetX = mapFromFrameToScene(snappedTargetFrame);
+        }
+        rect.moveLeft(targetX);
+        if (rect.topLeft().x() < min) {
+            rect.moveLeft(min);
+            setOutOfBounds(Location::Left);
+        } else if (rect.topRight().x() > max) {
+            rect.moveRight(max);
+            setOutOfBounds(Location::Right);
+        }
+        setRect(rect);
+    }
+}
+
+void TransitionEditorBarItem::dragHandle(QRectF rect, const QPointF &pos, qreal min, qreal max)
+{
+    QRectF left, right;
+    handleRects(rect, left, right);
+
+    if (isActiveHandle(Location::Left)) {
+        if (validateBounds(pos.x() - left.topLeft().x())) {
+            qreal targetX = pos.x() - m_pivot;
+            if (QApplication::keyboardModifiers() & Qt::ShiftModifier) { // snapping
+                qreal snappedTargetFrame = abstractScrollGraphicsScene()->snap(mapFromSceneToFrame(targetX));
+                targetX = mapFromFrameToScene(snappedTargetFrame);
+            }
+            rect.setLeft(targetX);
+            if (rect.left() < min) {
+                rect.setLeft(min);
+                setOutOfBounds(Location::Left);
+            } else if (rect.left() >= rect.right() - minimumBarWidth)
+                rect.setLeft(rect.right() - minimumBarWidth);
+
+            setRect(rect);
+        }
+    } else if (isActiveHandle(Location::Right)) {
+        if (validateBounds(pos.x() - right.topRight().x())) {
+            qreal targetX = pos.x() - m_pivot;
+            if (QApplication::keyboardModifiers() & Qt::ShiftModifier) { // snapping
+                qreal snappedTargetFrame = abstractScrollGraphicsScene()->snap(mapFromSceneToFrame(targetX));
+                targetX = mapFromFrameToScene(snappedTargetFrame);
+            }
+            rect.setRight(targetX);
+            if (rect.right() > max) {
+                rect.setRight(max);
+                setOutOfBounds(Location::Right);
+            } else if (rect.right() <= rect.left() + minimumBarWidth)
+                rect.setRight(rect.left() + minimumBarWidth);
+
+            setRect(rect);
+        }
+    }
+}
+
+bool TransitionEditorBarItem::handleRects(const QRectF &rect, QRectF &left, QRectF &right) const
+{
+    if (rect.width() < minimumBarWidth)
+        return false;
+
+    const qreal handleSize = rect.height();
+
+    auto handleRect = QRectF(0, 0, handleSize, handleSize);
+    handleRect.moveCenter(rect.center());
+
+    handleRect.moveLeft(rect.left());
+    left = handleRect;
+
+    handleRect.moveRight(rect.right());
+    right = handleRect;
+
+    return true;
+}
+
+bool TransitionEditorBarItem::isActiveHandle(Location location) const
+{
+    return m_handle == location;
+}
+
+void TransitionEditorBarItem::setOutOfBounds(Location location)
+{
+    m_bounds = location;
+    update();
+}
+
+bool TransitionEditorBarItem::validateBounds(qreal distance)
+{
+    update();
+    if (m_bounds == Location::Left) {
+        if (distance > m_pivot)
+            m_bounds = Location::Center;
+        return false;
+
+    } else if (m_bounds == Location::Right) {
+        if (distance < m_pivot)
+            m_bounds = Location::Center;
+        return false;
+    }
+    return true;
+}
+
+} // namespace QmlDesigner

src/plugins/qmldesigner/components/transitioneditor/transitioneditorsectionitem.h

@@ -0,0 +1,145 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "transitioneditorconstants.h"
+
+#include <timelineeditor/timelineitem.h>
+#include <timelineeditor/timelinemovableabstractitem.h>
+
+#include <modelnode.h>
+#include <qmltimeline.h>
+
+QT_FORWARD_DECLARE_CLASS(QComboBox)
+QT_FORWARD_DECLARE_CLASS(QPainter)
+
+namespace QmlDesigner {
+
+class TransitionEditorSectionItem;
+class TransitionEditorPropertyItem;
+
+class TransitionEditorBarItem : public TimelineMovableAbstractItem
+{
+    Q_DECLARE_TR_FUNCTIONS(TimelineBarItem)
+
+    enum class Location { Undefined, Center, Left, Right };
+
+public:
+    explicit TransitionEditorBarItem(TransitionEditorSectionItem *parent);
+    explicit TransitionEditorBarItem(TransitionEditorPropertyItem *parent);
+
+    void itemMoved(const QPointF &start, const QPointF &end) override;
+    void commitPosition(const QPointF &point) override;
+
+protected:
+    void scrollOffsetChanged() override;
+    void paint(QPainter *painter,
+               const QStyleOptionGraphicsItem *option,
+               QWidget *widget = nullptr) override;
+    void hoverMoveEvent(QGraphicsSceneHoverEvent *) override;
+    void contextMenuEvent(QGraphicsSceneContextMenuEvent *event) override;
+    void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
+
+private:
+    TransitionEditorSectionItem *sectionItem() const;
+    TransitionEditorPropertyItem *propertyItem() const;
+
+    void dragInit(const QRectF &rect, const QPointF &pos);
+    void dragCenter(QRectF rect, const QPointF &pos, qreal min, qreal max);
+    void dragHandle(QRectF rect, const QPointF &pos, qreal min, qreal max);
+    bool handleRects(const QRectF &rect, QRectF &left, QRectF &right) const;
+    bool isActiveHandle(Location location) const;
+
+    void setOutOfBounds(Location location);
+    bool validateBounds(qreal pivot);
+
+private:
+    Location m_handle = Location::Undefined;
+
+    Location m_bounds = Location::Undefined;
+
+    qreal m_pivot = 0.0;
+
+    QRectF m_oldRect;
+
+    static constexpr qreal minimumBarWidth = 2.0
+                                             * static_cast<qreal>(TimelineConstants::sectionHeight);
+};
+
+class TransitionEditorSectionItem : public TimelineItem
+{
+    Q_OBJECT
+
+public:
+    enum { Type =  TransitionEditorConstants::transitionEditorSectionItemUserType };
+
+    static TransitionEditorSectionItem *create(const ModelNode &animation,
+                                       TimelineItem *parent);
+
+    void invalidateBar();
+
+    int type() const override;
+
+    static void updateData(QGraphicsItem *item);
+    static void invalidateBar(QGraphicsItem *item);
+    static void updateDataForTarget(QGraphicsItem *item, const ModelNode &target, bool *b);
+
+    void moveAllDurations(qreal offset);
+    void scaleAllDurations(qreal scale);
+    qreal firstFrame();
+    AbstractView *view() const;
+    bool isSelected() const;
+
+    ModelNode targetNode() const;
+    void updateData();
+
+protected:
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
+    void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event) override;
+    void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
+    void resizeEvent(QGraphicsSceneResizeEvent *event) override;
+    void contextMenuEvent(QGraphicsSceneContextMenuEvent *event) override;
+
+private:
+    void invalidateHeight();
+    void invalidateProperties();
+    bool collapsed() const;
+    qreal rulerWidth() const;
+    void toggleCollapsed();
+    void createPropertyItems();
+    const QList<QGraphicsItem *> propertyItems() const;
+
+    TransitionEditorSectionItem(TimelineItem *parent = nullptr);
+    ModelNode m_targetNode;
+    ModelNode m_animationNode;
+
+    TransitionEditorBarItem *m_barItem;
+    TimelineItem *m_dummyItem;
+
+};
+
+} // namespace QmlDesigner

src/plugins/qmldesigner/components/transitioneditor/transitioneditorsettingsdialog.cpp

@@ -0,0 +1,177 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "transitioneditorsettingsdialog.h"
+#include "timelinesettingsdialog.h"
+#include "transitioneditorview.h"
+#include "ui_transitioneditorsettingsdialog.h"
+
+#include "timelineicons.h"
+#include "timelinesettingsmodel.h"
+#include "transitionform.h"
+
+#include <abstractview.h>
+#include <bindingproperty.h>
+#include <exception>
+#include <nodelistproperty.h>
+#include <nodemetainfo.h>
+#include <rewritertransaction.h>
+#include <variantproperty.h>
+
+#include <utils/algorithm.h>
+#include <utils/qtcassert.h>
+
+#include <QKeyEvent>
+#include <QToolBar>
+
+namespace QmlDesigner {
+
+static void deleteAllTabs(QTabWidget *tabWidget)
+{
+    while (tabWidget->count() > 0) {
+        QWidget *w = tabWidget->widget(0);
+        tabWidget->removeTab(0);
+        delete w;
+    }
+}
+
+static ModelNode getTransitionFromTabWidget(QTabWidget *tabWidget)
+{
+    QWidget *w = tabWidget->currentWidget();
+    if (w)
+        return qobject_cast<TransitionForm *>(w)->transition();
+    return QmlTimeline();
+}
+
+static void setTabForTransition(QTabWidget *tabWidget, const ModelNode &timeline)
+{
+    for (int i = 0; i < tabWidget->count(); ++i) {
+        QWidget *w = tabWidget->widget(i);
+        if (qobject_cast<TransitionForm *>(w)->transition() == timeline) {
+            tabWidget->setCurrentIndex(i);
+            return;
+        }
+    }
+}
+
+TransitionEditorSettingsDialog::TransitionEditorSettingsDialog(QWidget *parent,
+                                                               class TransitionEditorView *view)
+    : QDialog(parent)
+    , ui(new Ui::TransitionEditorSettingsDialog)
+    , m_transitionEditorView(view)
+{
+    //m_timelineSettingsModel = new TimelineSettingsModel(this, view);
+
+    ui->setupUi(this);
+
+    auto *transitionCornerWidget = new QToolBar;
+
+    auto *transitionAddAction = new QAction(TimelineIcons::ADD_TIMELINE.icon(),
+                                            tr("Add Transition"));
+    auto *transitionRemoveAction = new QAction(TimelineIcons::REMOVE_TIMELINE.icon(),
+                                               tr("Remove Transition"));
+
+    connect(transitionAddAction, &QAction::triggered, this, [this]() {
+        setupTransitions(m_transitionEditorView->addNewTransition());
+    });
+
+    connect(transitionRemoveAction, &QAction::triggered, this, [this]() {
+        ModelNode transition = getTransitionFromTabWidget(ui->timelineTab);
+        if (transition.isValid()) {
+            transition.destroy();
+            setupTransitions({});
+        }
+    });
+
+    transitionCornerWidget->addAction(transitionAddAction);
+    transitionCornerWidget->addAction(transitionRemoveAction);
+
+    ui->timelineTab->setCornerWidget(transitionCornerWidget, Qt::TopRightCorner);
+
+    setupTransitions({});
+
+    connect(ui->timelineTab, &QTabWidget::currentChanged, this, [this]() {
+        m_currentTransition = getTransitionFromTabWidget(ui->timelineTab);
+    });
+}
+
+void TransitionEditorSettingsDialog::setCurrentTransition(const ModelNode &timeline)
+{
+    m_currentTransition = timeline;
+    setTabForTransition(ui->timelineTab, m_currentTransition);
+}
+
+TransitionEditorSettingsDialog::~TransitionEditorSettingsDialog()
+{
+    delete ui;
+}
+
+void TransitionEditorSettingsDialog::keyPressEvent(QKeyEvent *event)
+{
+    switch (event->key()) {
+    case Qt::Key_Return:
+    case Qt::Key_Enter:
+        /* ignore */
+        break;
+
+    default:
+        QDialog::keyPressEvent(event);
+    }
+}
+
+void TransitionEditorSettingsDialog::setupTransitions(const ModelNode &newTransition)
+{
+    deleteAllTabs(ui->timelineTab);
+
+    const QList<ModelNode> &transitions = m_transitionEditorView->allTransitions();
+
+    if (transitions.isEmpty()) {
+        m_currentTransition = {};
+        auto transitionForm = new TransitionForm(this);
+        transitionForm->setDisabled(true);
+        ui->timelineTab->addTab(transitionForm, tr("No Transition"));
+        return;
+    }
+
+    for (const auto &transition : transitions)
+        addTransitionTab(transition);
+
+    if (newTransition.isValid()) {
+        m_currentTransition = newTransition;
+    } else {
+        m_currentTransition = transitions.constFirst();
+    }
+
+    setTabForTransition(ui->timelineTab, m_currentTransition);
+}
+
+void TransitionEditorSettingsDialog::addTransitionTab(const QmlTimeline &node)
+{
+    auto transitionForm = new TransitionForm(this);
+    ui->timelineTab->addTab(transitionForm, node.modelNode().displayName());
+    transitionForm->setTransition(node);
+}
+
+} // namespace QmlDesigner

src/plugins/qmldesigner/components/transitioneditor/transitioneditorsettingsdialog.h

@@ -0,0 +1,66 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <qmltimeline.h>
+
+#include <QDialog>
+
+QT_FORWARD_DECLARE_CLASS(QSpinBox)
+
+namespace QmlDesigner {
+
+class TransitionForm;
+class TransitionEditorView;
+
+namespace Ui {
+class TransitionEditorSettingsDialog;
+}
+
+class TransitionEditorSettingsDialog : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit TransitionEditorSettingsDialog(QWidget *parent, class TransitionEditorView *view);
+    void setCurrentTransition(const ModelNode &timeline);
+    ~TransitionEditorSettingsDialog() override;
+
+protected:
+    void keyPressEvent(QKeyEvent *event) override;
+
+private:
+    void setupTransitions(const ModelNode &node);
+
+    void addTransitionTab(const QmlTimeline &node);
+
+    Ui::TransitionEditorSettingsDialog *ui;
+
+    TransitionEditorView *m_transitionEditorView;
+    ModelNode m_currentTransition;
+};
+
+} // namespace QmlDesigner

src/plugins/qmldesigner/components/transitioneditor/transitioneditorsettingsdialog.ui

@@ -0,0 +1,74 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>QmlDesigner::TransitionEditorSettingsDialog</class>
+ <widget class="QDialog" name="QmlDesigner::TransitionEditorSettingsDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>519</width>
+    <height>582</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Transition Settings</string>
+  </property>
+  <property name="modal">
+   <bool>true</bool>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QTabWidget" name="timelineTab">
+     <property name="currentIndex">
+      <number>-1</number>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Close</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>QmlDesigner::TransitionEditorSettingsDialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>248</x>
+     <y>254</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>QmlDesigner::TransitionEditorSettingsDialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>316</x>
+     <y>260</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>286</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>

src/plugins/qmldesigner/components/transitioneditor/transitioneditortoolbar.cpp

@@ -0,0 +1,342 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "transitioneditortoolbar.h"
+#include "transitioneditorgraphicsscene.h"
+
+#include "timelineconstants.h"
+
+#include "timelineicons.h"
+
+#include "timelineview.h"
+#include "timelinewidget.h"
+
+#include <designeractionmanager.h>
+#include <nodelistproperty.h>
+#include <theme.h>
+#include <variantproperty.h>
+#include <qmlstate.h>
+#include <qmltimeline.h>
+
+#include <coreplugin/actionmanager/actionmanager.h>
+#include <coreplugin/actionmanager/command.h>
+#include <coreplugin/icore.h>
+
+#include <utils/algorithm.h>
+
+#include <QApplication>
+#include <QComboBox>
+#include <QIntValidator>
+#include <QLineEdit>
+#include <QResizeEvent>
+#include <QSlider>
+
+#include <cmath>
+
+namespace QmlDesigner {
+
+static bool isSpacer(QObject *object)
+{
+    return object->property("spacer_widget").toBool();
+}
+
+static QWidget *createSpacer()
+{
+    QWidget *spacer = new QWidget();
+    spacer->setProperty("spacer_widget", true);
+    return spacer;
+}
+
+static int controlWidth(QToolBar *bar, QObject *control)
+{
+    QWidget *widget = nullptr;
+
+    if (auto *action = qobject_cast<QAction *>(control))
+        widget = bar->widgetForAction(action);
+
+    if (widget == nullptr)
+        widget = qobject_cast<QWidget *>(control);
+
+    if (widget)
+        return widget->width();
+
+    return 0;
+}
+
+static QAction *createAction(const Core::Id &id,
+                             const QIcon &icon,
+                             const QString &name,
+                             const QKeySequence &shortcut)
+{
+    QString text = QString("%1 (%2)").arg(name).arg(shortcut.toString());
+
+    Core::Context context(TimelineConstants::C_QMLTIMELINE);
+
+    auto *action = new QAction(icon, text);
+    auto *command = Core::ActionManager::registerAction(action, id, context);
+    command->setDefaultKeySequence(shortcut);
+
+    return action;
+}
+
+TransitionEditorToolBar::TransitionEditorToolBar(QWidget *parent)
+    : QToolBar(parent)
+    , m_grp()
+{
+    setContentsMargins(0, 0, 0, 0);
+    createLeftControls();
+    createCenterControls();
+    createRightControls();
+}
+
+void TransitionEditorToolBar::reset() {}
+
+int TransitionEditorToolBar::scaleFactor() const
+{
+    if (m_scale)
+        return m_scale->value();
+    return 0;
+}
+
+QString TransitionEditorToolBar::currentTransitionId() const
+{
+    return m_transitionComboBox->currentText();
+}
+
+void TransitionEditorToolBar::setBlockReflection(bool block)
+{
+    m_blockReflection = block;
+}
+
+void TransitionEditorToolBar::updateComboBox(const ModelNode &root)
+{
+    if (root.isValid() && root.hasProperty("transitions")) {
+        NodeAbstractProperty transitions = root.nodeAbstractProperty("transitions");
+        if (transitions.isValid())
+            for (const ModelNode &transition : transitions.directSubNodes())
+                m_transitionComboBox->addItem(transition.id());
+    }
+}
+
+void TransitionEditorToolBar::setCurrentTransition(const ModelNode &transition)
+{
+    if (m_blockReflection)
+        return;
+
+    if (transition.isValid()) {
+        m_transitionComboBox->clear();
+        const ModelNode root = transition.view()->rootModelNode();
+        updateComboBox(root);
+        m_transitionComboBox->setCurrentText(transition.id());
+    } else {
+        m_transitionComboBox->clear();
+        m_transitionComboBox->setCurrentText("");
+    }
+}
+
+void TransitionEditorToolBar::setDuration(qreal frame)
+{
+    auto text = QString::number(frame, 'f', 0);
+    m_duration->setText(text);
+}
+
+void TransitionEditorToolBar::setScaleFactor(int factor)
+{
+    const QSignalBlocker blocker(m_scale);
+    m_scale->setValue(factor);
+}
+
+void TransitionEditorToolBar::setActionEnabled(const QString &name, bool enabled)
+{
+    for (auto *action : actions())
+        if (action->objectName() == name)
+            action->setEnabled(enabled);
+}
+
+void TransitionEditorToolBar::createLeftControls()
+{
+    auto addActionToGroup = [&](QAction *action) {
+        addAction(action);
+        m_grp << action;
+    };
+
+    auto addWidgetToGroup = [&](QWidget *widget) {
+        addWidget(widget);
+        m_grp << widget;
+    };
+
+    auto addSpacingToGroup = [&](int width) {
+        auto *widget = new QWidget;
+        widget->setFixedWidth(width);
+        addWidget(widget);
+        m_grp << widget;
+    };
+
+    addSpacingToGroup(5);
+
+    auto *settingsAction = createAction(TimelineConstants::C_SETTINGS,
+                                        TimelineIcons::ANIMATION.icon(),
+                                        tr("Transition Settings"),
+                                        QKeySequence(Qt::Key_S));
+    connect(settingsAction,
+            &QAction::triggered,
+            this,
+            &TransitionEditorToolBar::settingDialogClicked);
+
+    addActionToGroup(settingsAction);
+
+    addWidgetToGroup(createSpacer());
+
+    m_transitionComboBox = new QComboBox(this);
+    addWidgetToGroup(m_transitionComboBox);
+
+    connect(m_transitionComboBox, &QComboBox::currentTextChanged, this, [this]() {
+        emit currentTransitionChanged(m_transitionComboBox->currentText());
+    });
+}
+
+static QLineEdit *createToolBarLineEdit(QWidget *parent)
+{
+    auto lineEdit = new QLineEdit(parent);
+    lineEdit->setStyleSheet("* { background-color: rgba(0, 0, 0, 0); }");
+    lineEdit->setFixedWidth(48);
+    lineEdit->setAlignment(Qt::AlignCenter);
+
+    QPalette pal = parent->palette();
+    pal.setColor(QPalette::Text, Theme::instance()->color(Utils::Theme::PanelTextColorLight));
+    lineEdit->setPalette(pal);
+    QValidator *validator = new QIntValidator(-100000, 100000, lineEdit);
+    lineEdit->setValidator(validator);
+
+    return lineEdit;
+}
+
+void TransitionEditorToolBar::createCenterControls()
+{
+    addSpacing(10);
+
+    auto *curvePicker = createAction(TimelineConstants::C_CURVE_PICKER,
+                                     TimelineIcons::CURVE_EDITOR.icon(),
+                                     tr("Easing Curve Editor"),
+                                     QKeySequence(Qt::Key_C));
+
+    curvePicker->setObjectName("Easing Curve Editor");
+    connect(curvePicker, &QAction::triggered, this, &TransitionEditorToolBar::openEasingCurveEditor);
+    addAction(curvePicker);
+
+    addSpacing(10);
+
+#if 0
+    addSeparator();
+
+    addSpacing(10);
+
+    auto *curveEditor = new QAction(TimelineIcons::CURVE_PICKER.icon(), tr("Curve Editor"));
+    addAction(curveEditor);
+#endif
+}
+
+void TransitionEditorToolBar::createRightControls()
+{
+    auto *spacer = createSpacer();
+    spacer->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+    addWidget(spacer);
+
+    addSeparator();
+    addSpacing(10);
+
+    auto *zoomOut = createAction(TimelineConstants::C_ZOOM_OUT,
+                                 TimelineIcons::ZOOM_SMALL.icon(),
+                                 tr("Zoom Out"),
+                                 QKeySequence(QKeySequence::ZoomOut));
+
+    connect(zoomOut, &QAction::triggered, [this]() {
+        m_scale->setValue(m_scale->value() - m_scale->pageStep());
+    });
+    addAction(zoomOut);
+
+    addSpacing(10);
+
+    m_scale = new QSlider(this);
+    m_scale->setOrientation(Qt::Horizontal);
+    m_scale->setMaximumWidth(200);
+    m_scale->setMinimumWidth(100);
+    m_scale->setMinimum(0);
+    m_scale->setMaximum(100);
+    m_scale->setValue(0);
+
+    connect(m_scale, &QSlider::valueChanged, this, &TransitionEditorToolBar::scaleFactorChanged);
+    addWidget(m_scale);
+
+    addSpacing(10);
+
+    auto *zoomIn = createAction(TimelineConstants::C_ZOOM_IN,
+                                TimelineIcons::ZOOM_BIG.icon(),
+                                tr("Zoom In"),
+                                QKeySequence(QKeySequence::ZoomIn));
+
+    connect(zoomIn, &QAction::triggered, [this]() {
+        m_scale->setValue(m_scale->value() + m_scale->pageStep());
+    });
+    addAction(zoomIn);
+
+    addSpacing(10);
+
+    addSeparator();
+
+    m_duration = createToolBarLineEdit(this);
+    addWidget(m_duration);
+
+    auto emitEndChanged = [this]() { emit durationChanged(m_duration->text().toInt()); };
+    connect(m_duration, &QLineEdit::editingFinished, emitEndChanged);
+}
+
+void TransitionEditorToolBar::addSpacing(int width)
+{
+    auto *widget = new QWidget;
+    widget->setFixedWidth(width);
+    addWidget(widget);
+}
+
+void TransitionEditorToolBar::resizeEvent(QResizeEvent *event)
+{
+    Q_UNUSED(event)
+
+    int width = 0;
+    QWidget *spacer = nullptr;
+    for (auto *object : qAsConst(m_grp)) {
+        if (isSpacer(object))
+            spacer = qobject_cast<QWidget *>(object);
+        else
+            width += controlWidth(this, object);
+    }
+
+    if (spacer) {
+        int spacerWidth = TimelineConstants::sectionWidth - width - 12;
+        spacer->setFixedWidth(spacerWidth > 0 ? spacerWidth : 0);
+    }
+}
+
+} // namespace QmlDesigner

src/plugins/qmldesigner/components/transitioneditor/transitioneditortoolbar.h

@@ -0,0 +1,92 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "animationcurvedialog.h"
+#include "animationcurveeditormodel.h"
+
+#include <QToolBar>
+
+QT_FORWARD_DECLARE_CLASS(QComboBox)
+QT_FORWARD_DECLARE_CLASS(QLineEdit)
+QT_FORWARD_DECLARE_CLASS(QObject)
+QT_FORWARD_DECLARE_CLASS(QResizeEvent)
+QT_FORWARD_DECLARE_CLASS(QSlider)
+QT_FORWARD_DECLARE_CLASS(QWidget)
+
+namespace QmlDesigner {
+
+class TimelineWidget;
+
+class QmlTimeline;
+
+class TransitionEditorToolBar : public QToolBar
+{
+    Q_OBJECT
+
+signals:
+    void settingDialogClicked();
+
+    void scaleFactorChanged(int value);
+    void durationChanged(int value);
+    void currentTransitionChanged(const QString &name);
+    void openEasingCurveEditor();
+
+public:
+    explicit TransitionEditorToolBar(QWidget *parent = nullptr);
+
+    void reset();
+
+    int scaleFactor() const;
+    QString currentTransitionId() const;
+
+    void setBlockReflection(bool block);
+    void setCurrentTransition(const ModelNode &transition);
+    void setDuration(qreal frame);
+    void setScaleFactor(int factor);
+
+    void setActionEnabled(const QString &name, bool enabled);
+
+    void updateComboBox(const ModelNode &root);
+protected:
+    void resizeEvent(QResizeEvent *event) override;
+
+private:
+    void createLeftControls();
+    void createCenterControls();
+    void createRightControls();
+    void addSpacing(int width);
+
+    QList<QObject *> m_grp;
+
+    QComboBox *m_transitionComboBox = nullptr;
+    QSlider *m_scale = nullptr;
+    QLineEdit *m_duration = nullptr;
+
+    bool m_blockReflection = false;
+};
+
+} // namespace QmlDesigner

src/plugins/qmldesigner/components/transitioneditor/transitioneditorview.cpp

@@ -0,0 +1,348 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "transitioneditorview.h"
+
+#include "transitioneditortoolbar.h"
+#include "transitioneditorwidget.h"
+
+#include "transitioneditorgraphicsscene.h"
+#include "transitioneditorsettingsdialog.h"
+
+#include <bindingproperty.h>
+#include <exception.h>
+#include <modelnodecontextmenu_helper.h>
+#include <nodeabstractproperty.h>
+#include <nodelistproperty.h>
+#include <nodemetainfo.h>
+#include <rewritertransaction.h>
+#include <variantproperty.h>
+#include <viewmanager.h>
+#include <qmldesignericons.h>
+#include <qmldesignerplugin.h>
+#include <qmlitemnode.h>
+#include <qmlobjectnode.h>
+#include <qmlstate.h>
+#include <qmltimeline.h>
+#include <qmltimelinekeyframegroup.h>
+
+#include <designmodecontext.h>
+
+#include <coreplugin/icore.h>
+#include <coreplugin/messagebox.h>
+
+#include <utils/algorithm.h>
+#include <utils/qtcassert.h>
+
+#include <QTimer>
+
+namespace QmlDesigner {
+
+TransitionEditorView::TransitionEditorView(QObject *parent)
+    : AbstractView(parent)
+    , m_transitionEditorWidget(nullptr)
+{
+
+}
+
+TransitionEditorView::~TransitionEditorView() = default;
+
+void TransitionEditorView::modelAttached(Model *model)
+{
+    AbstractView::modelAttached(model);
+    if (m_transitionEditorWidget)
+        m_transitionEditorWidget->init();
+}
+
+void TransitionEditorView::modelAboutToBeDetached(Model *model)
+{
+    m_transitionEditorWidget->reset();
+
+    AbstractView::modelAboutToBeDetached(model);
+}
+
+void TransitionEditorView::nodeCreated(const ModelNode & /*createdNode*/) {}
+
+void TransitionEditorView::nodeAboutToBeRemoved(const ModelNode & /*removedNode*/) {}
+
+void TransitionEditorView::nodeRemoved(const ModelNode & removedNode,
+                               const NodeAbstractProperty &parentProperty,
+                               PropertyChangeFlags /*propertyChange*/)
+{
+    if (parentProperty.name() == "transitions")
+        widget()->updateData(removedNode);
+}
+
+void TransitionEditorView::nodeReparented(const ModelNode &node,
+                                          const NodeAbstractProperty &newPropertyParent,
+                                          const NodeAbstractProperty & /*oldPropertyParent*/,
+                                          AbstractView::PropertyChangeFlags /*propertyChange*/)
+{
+    if (newPropertyParent.name() == "transitions")
+        asyncUpdate(node);
+
+    const ModelNode parent = newPropertyParent.parentModelNode();
+
+    qDebug() << Q_FUNC_INFO << parent;
+    if (parent.isValid() && parent.metaInfo().isValid()
+        && parent.metaInfo().isSubclassOf("QtQuick.Transition")) {
+        asyncUpdate(parent);
+    }
+}
+
+void TransitionEditorView::instancePropertyChanged(
+    const QList<QPair<ModelNode, PropertyName>> & /*propertyList*/)
+{
+
+}
+
+void TransitionEditorView::variantPropertiesChanged(
+    const QList<VariantProperty> & /* propertyList */,
+    AbstractView::PropertyChangeFlags /*propertyChange*/)
+{
+
+}
+
+void TransitionEditorView::bindingPropertiesChanged(
+    const QList<BindingProperty> & /*propertyList */,
+    AbstractView::PropertyChangeFlags /* propertyChange */)
+{
+
+}
+
+void TransitionEditorView::selectedNodesChanged(const QList<ModelNode> & /*selectedNodeList*/,
+                                        const QList<ModelNode> & /*lastSelectedNodeList*/)
+{
+
+}
+
+void TransitionEditorView::propertiesAboutToBeRemoved(
+    const QList<AbstractProperty> & /*propertyList */)
+{
+
+}
+
+void TransitionEditorView::propertiesRemoved(const QList<AbstractProperty> &propertyList)
+{
+    for (const AbstractProperty &property : propertyList) {
+        if (property.name() == "transitions")
+            widget()->init();
+    }
+}
+
+bool TransitionEditorView::hasWidget() const
+{
+    return true;
+}
+
+void TransitionEditorView::nodeIdChanged(const ModelNode &node, const QString &, const QString &)
+{
+    if (node.metaInfo().isValid() && node.metaInfo().isSubclassOf("QtQuick.Transition"))
+        widget()->init();
+}
+
+void TransitionEditorView::currentStateChanged(const ModelNode &)
+{
+
+}
+
+TransitionEditorWidget *TransitionEditorView::widget() const
+{
+    return m_transitionEditorWidget;
+}
+
+void TransitionEditorView::registerActions()
+{
+
+}
+
+ModelNode TransitionEditorView::addNewTransition()
+{
+    QList<QmlModelState> states;
+    const ModelNode root = rootModelNode();
+
+    if (QmlVisualNode::isValidQmlVisualNode(root)) {
+        states = QmlVisualNode(root).states().allStates();
+    }
+
+    if (states.isEmpty()) {
+        Core::AsynchronousMessageBox::warning(tr("No States Defined"),
+                                              tr("There are no states defined in this component."));
+        return {};
+    }
+
+    QHash<QString, QStringList> idPropertyList;
+
+    const QVector<TypeName> validProperties = {"int", "real", "double", "qreal", "color", "QColor"};
+
+    for (const QmlModelState &state : qAsConst(states)) {
+        for (const QmlPropertyChanges & change : state.propertyChanges()) {
+            QStringList locList;
+            const ModelNode target = change.target();
+            const QString targetId = target.id();
+            if (target.isValid() && target.hasMetaInfo()) {
+                for (const VariantProperty &property : change.modelNode().variantProperties()) {
+                    TypeName typeName = target.metaInfo().propertyTypeName(property.name());
+
+                    if (validProperties.contains(typeName))
+                        locList.append(QString::fromUtf8(property.name()));
+                }
+                if (idPropertyList.contains(targetId)) {
+                    QStringList newlist = idPropertyList.value(targetId);
+                    for (const QString  &str :locList)
+                        if (!newlist.contains(str))
+                                newlist.append(str);
+                    idPropertyList.insert(targetId, newlist);
+                } else {
+                    if (!locList.isEmpty())
+                        idPropertyList.insert(targetId, locList);
+                }
+            }
+        }
+    }
+
+    ModelNode transition;
+
+    if (!idPropertyList.isEmpty()) {
+        executeInTransaction(
+            " TransitionEditorView::addNewTransition", [&transition, idPropertyList, root, this]() {
+                transition = createModelNode("QtQuick.Transition",
+                                             2,
+                                             0,
+                                             {{
+                                                  "from",
+                                                  "*",
+                                              },
+                                              {
+                                                  "to",
+                                                  "*",
+                                              }});
+                transition.setAuxiliaryData("transitionDuration", 2000);
+                transition.validId();
+                root.nodeListProperty("transitions").reparentHere(transition);
+
+                for (const QString &id : idPropertyList.keys()) {
+                    ModelNode parallelAnimation = createModelNode("QtQuick.ParallelAnimation",
+                                                                  2,
+                                                                  12);
+                    transition.defaultNodeAbstractProperty().reparentHere(parallelAnimation);
+                    for (const QString &property : idPropertyList.value(id)) {
+                        ModelNode sequentialAnimation
+                            = createModelNode("QtQuick.SequentialAnimation", 2, 12);
+                        parallelAnimation.defaultNodeAbstractProperty().reparentHere(
+                            sequentialAnimation);
+
+                        ModelNode pauseAnimation = createModelNode("QtQuick.PauseAnimation",
+                                                                   2,
+                                                                   12,
+                                                                   {{"duration", 50}});
+                        sequentialAnimation.defaultNodeAbstractProperty().reparentHere(
+                            pauseAnimation);
+
+                        ModelNode propertyAnimation = createModelNode("QtQuick.PropertyAnimation",
+                                                                      2,
+                                                                      12,
+                                                                      {{"property", property},
+                                                                       {"duration", 150}});
+                        propertyAnimation.bindingProperty("target").setExpression(id);
+                        sequentialAnimation.defaultNodeAbstractProperty().reparentHere(
+                            propertyAnimation);
+                    }
+                }
+            });
+    }
+
+    if (m_transitionEditorWidget)
+        m_transitionEditorWidget->init();
+
+    return transition;
+}
+
+TransitionEditorWidget *TransitionEditorView::createWidget()
+{
+    if (!m_transitionEditorWidget)
+        m_transitionEditorWidget = new TransitionEditorWidget(this);
+
+    //auto *timelineContext = new TimelineContext(m_timelineWidget);
+    //Core::ICore::addContextObject(timelineContext);
+
+    return m_transitionEditorWidget;
+}
+
+WidgetInfo TransitionEditorView::widgetInfo()
+{
+    return createWidgetInfo(createWidget(),
+                            nullptr,
+                            "TransitionEditor",
+                            WidgetInfo::BottomPane,
+                            0,
+                            tr("Transition Editor"));
+}
+
+void TransitionEditorView::openSettingsDialog()
+{
+    auto dialog = new TransitionEditorSettingsDialog(Core::ICore::dialogParent(), this);
+
+    auto transition = widget()->graphicsScene()->transitionModelNode();
+    if (transition.isValid())
+        dialog->setCurrentTransition(transition);
+
+    QObject::connect(dialog, &TransitionEditorSettingsDialog::rejected, [this, dialog]() {
+        widget()->init();
+        dialog->deleteLater();
+    });
+
+    QObject::connect(dialog, &TransitionEditorSettingsDialog::accepted, [this, dialog]() {
+        widget()->init();
+        dialog->deleteLater();
+    });
+
+    dialog->show();
+}
+
+const QList<ModelNode> TransitionEditorView::allTransitions() const
+{
+    if (rootModelNode().isValid() && rootModelNode().hasProperty("transitions")) {
+        NodeAbstractProperty transitions = rootModelNode().nodeAbstractProperty("transitions");
+        if (transitions.isValid())
+            return transitions.directSubNodes();
+    }
+    return {};
+}
+
+void TransitionEditorView::asyncUpdate(const ModelNode &transition)
+{
+    static bool updateTriggered = false;
+
+    if (!updateTriggered && (transition.id() == widget()->toolBar()->currentTransitionId())) {
+        updateTriggered = true;
+        QTimer::singleShot(0, [this, transition]() {
+            widget()->updateData(transition);
+            updateTriggered = false;
+        });
+    }
+}
+
+} // namespace QmlDesigner

src/plugins/qmldesigner/components/transitioneditor/transitioneditorview.h

@@ -0,0 +1,97 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "animationcurvedialog.h"
+#include "animationcurveeditormodel.h"
+#include "treeitem.h"
+
+#include <abstractview.h>
+
+#include <QPointer>
+
+namespace QmlDesigner {
+
+class TransitionEditorWidget;
+
+class TransitionEditorView : public AbstractView
+{
+    Q_OBJECT
+
+public:
+    explicit TransitionEditorView(QObject *parent = nullptr);
+    ~TransitionEditorView() override;
+    //Abstract View
+    WidgetInfo widgetInfo() override;
+    void modelAttached(Model *model) override;
+    void modelAboutToBeDetached(Model *model) override;
+    void nodeCreated(const ModelNode &createdNode) override;
+    void nodeAboutToBeRemoved(const ModelNode &removedNode) override;
+    void nodeRemoved(const ModelNode &removedNode,
+                     const NodeAbstractProperty &parentProperty,
+                     PropertyChangeFlags propertyChange) override;
+    void nodeReparented(const ModelNode &node,
+                        const NodeAbstractProperty &newPropertyParent,
+                        const NodeAbstractProperty &oldPropertyParent,
+                        PropertyChangeFlags propertyChange) override;
+    void instancePropertyChanged(const QList<QPair<ModelNode, PropertyName>> &propertyList) override;
+    void variantPropertiesChanged(const QList<VariantProperty> &propertyList,
+                                  PropertyChangeFlags propertyChange) override;
+    void bindingPropertiesChanged(const QList<BindingProperty> &propertyList,
+                                  PropertyChangeFlags propertyChange) override;
+    void selectedNodesChanged(const QList<ModelNode> &selectedNodeList,
+                              const QList<ModelNode> &lastSelectedNodeList) override;
+
+    void propertiesAboutToBeRemoved(const QList<AbstractProperty> &propertyList) override;
+    void propertiesRemoved(const QList<AbstractProperty> &propertyList) override;
+
+    bool hasWidget() const override;
+
+    void nodeIdChanged(const ModelNode &node, const QString &, const QString &) override;
+
+    void currentStateChanged(const ModelNode &node) override;
+
+    TransitionEditorWidget *widget() const;
+
+    void insertKeyframe(const ModelNode &target, const PropertyName &propertyName);
+
+    void registerActions();
+
+    ModelNode addNewTransition();
+
+    void openSettingsDialog();
+
+    const QList<ModelNode> allTransitions() const;
+
+    void asyncUpdate(const ModelNode &transition);
+
+private:
+    TransitionEditorWidget *createWidget();
+
+    TransitionEditorWidget *m_transitionEditorWidget = nullptr;
+};
+
+} // namespace QmlDesigner

src/plugins/qmldesigner/components/transitioneditor/transitioneditorwidget.cpp

@@ -0,0 +1,414 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "transitioneditorwidget.h"
+
+#include "transitioneditorgraphicsscene.h"
+#include "transitioneditorpropertyitem.h"
+#include "transitioneditortoolbar.h"
+#include "transitioneditorview.h"
+
+#include <timelineeditor/easingcurvedialog.h>
+#include <timelineeditor/timelineconstants.h>
+#include <timelineeditor/timelineicons.h>
+
+#include <bindingproperty.h>
+#include <nodeabstractproperty.h>
+#include <nodemetainfo.h>
+
+#include <qmldesignerplugin.h>
+#include <qmlstate.h>
+#include <qmltimeline.h>
+
+#include <coreplugin/icore.h>
+
+#include <theme.h>
+#include <utils/algorithm.h>
+#include <utils/fileutils.h>
+
+#include <QApplication>
+#include <QComboBox>
+#include <QGraphicsView>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QMargins>
+#include <QPushButton>
+#include <QResizeEvent>
+#include <QScrollBar>
+#include <QShowEvent>
+#include <QSlider>
+#include <QSpacerItem>
+#include <QVBoxLayout>
+#include <QtGlobal>
+
+namespace QmlDesigner {
+
+class Eventfilter : public QObject
+{
+public:
+    Eventfilter(QObject *parent)
+        : QObject(parent)
+    {}
+
+    bool eventFilter(QObject *, QEvent *event) override
+    {
+        if (event->type() == QEvent::Wheel) {
+            event->accept();
+            return true;
+        }
+        return false;
+    }
+};
+
+TransitionEditorWidget::TransitionEditorWidget(TransitionEditorView *view)
+    : QWidget()
+    , m_toolbar(new TransitionEditorToolBar(this))
+    , m_rulerView(new QGraphicsView(this))
+    , m_graphicsView(new QGraphicsView(this))
+    , m_scrollbar(new QScrollBar(this))
+    , m_statusBar(new QLabel(this))
+    , m_transitionEditorView(view)
+    , m_graphicsScene(new TransitionEditorGraphicsScene(this))
+    , m_addButton(new QPushButton(this))
+    , m_onboardingContainer(new QWidget(this))
+{
+    setWindowTitle(tr("Transition", "Title of transition view"));
+    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+
+    const QString css = Theme::replaceCssColors(QString::fromUtf8(
+        Utils::FileReader::fetchQrc(QLatin1String(":/qmldesigner/scrollbar.css"))));
+
+    m_scrollbar->setStyleSheet(css);
+    m_scrollbar->setOrientation(Qt::Horizontal);
+
+    QSizePolicy sizePolicy1(QSizePolicy::Expanding, QSizePolicy::Preferred);
+    sizePolicy1.setHorizontalStretch(0);
+    sizePolicy1.setVerticalStretch(0);
+    sizePolicy1.setHeightForWidth(m_graphicsView->sizePolicy().hasHeightForWidth());
+
+    m_rulerView->setObjectName("RulerView");
+    m_rulerView->setFixedHeight(TimelineConstants::rulerHeight);
+    m_rulerView->setAlignment(Qt::AlignLeft | Qt::AlignTop);
+    m_rulerView->viewport()->installEventFilter(new Eventfilter(this));
+    m_rulerView->viewport()->setFocusPolicy(Qt::NoFocus);
+    m_rulerView->setStyleSheet(css);
+    m_rulerView->setFrameShape(QFrame::NoFrame);
+    m_rulerView->setFrameShadow(QFrame::Plain);
+    m_rulerView->setLineWidth(0);
+    m_rulerView->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    m_rulerView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    m_rulerView->setScene(graphicsScene());
+
+    m_graphicsView->setStyleSheet(css);
+    m_graphicsView->setObjectName("SceneView");
+    m_graphicsView->setFrameShape(QFrame::NoFrame);
+    m_graphicsView->setFrameShadow(QFrame::Plain);
+    m_graphicsView->setLineWidth(0);
+    m_graphicsView->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
+    m_graphicsView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+
+    m_graphicsView->setSizePolicy(sizePolicy1);
+    m_graphicsView->setScene(graphicsScene());
+    m_graphicsView->setAlignment(Qt::AlignLeft | Qt::AlignTop);
+    m_graphicsView->setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
+
+    auto *scrollBarLayout = new QHBoxLayout;
+    scrollBarLayout->addSpacing(TimelineConstants::sectionWidth);
+    scrollBarLayout->addWidget(m_scrollbar);
+
+    QMargins margins(0, 0, 0, QApplication::style()->pixelMetric(QStyle::PM_LayoutBottomMargin));
+
+    auto *contentLayout = new QVBoxLayout;
+    contentLayout->setContentsMargins(margins);
+    contentLayout->addWidget(m_rulerView);
+    contentLayout->addWidget(m_graphicsView);
+    contentLayout->addLayout(scrollBarLayout);
+    contentLayout->addWidget(m_statusBar);
+    m_statusBar->setIndent(2);
+    m_statusBar->setFixedHeight(TimelineConstants::rulerHeight);
+
+    auto *widgetLayout = new QVBoxLayout;
+    widgetLayout->setContentsMargins(0, 0, 0, 0);
+    widgetLayout->setSpacing(0);
+    widgetLayout->addWidget(m_toolbar);
+    widgetLayout->addWidget(m_addButton);
+
+    m_addButton->setIcon(TimelineIcons::ADD_TIMELINE_TOOLBAR.icon());
+    m_addButton->setToolTip(tr("Add Transition"));
+    m_addButton->setFlat(true);
+    m_addButton->setFixedSize(32, 32);
+
+    widgetLayout->addWidget(m_onboardingContainer);
+
+    auto *onboardingTopLabel = new QLabel(m_onboardingContainer);
+    auto *onboardingBottomLabel = new QLabel(m_onboardingContainer);
+    auto *onboardingBottomIcon = new QLabel(m_onboardingContainer);
+
+    auto *onboardingLayout = new QVBoxLayout;
+    auto *onboardingSublayout = new QHBoxLayout;
+    auto *leftSpacer = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
+    auto *rightSpacer = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
+    auto *topSpacer = new QSpacerItem(40, 20, QSizePolicy::Minimum, QSizePolicy::Expanding);
+    auto *bottomSpacer = new QSpacerItem(40, 20, QSizePolicy::Minimum, QSizePolicy::Expanding);
+
+    QString labelText = tr("This file does not contain transitions. <br><br> \
+            To create an animation, add a transition by clicking the + button.");
+    onboardingTopLabel->setText(labelText);
+    onboardingTopLabel->setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);
+
+    m_onboardingContainer->setLayout(onboardingLayout);
+    onboardingLayout->setContentsMargins(0, 0, 0, 0);
+    onboardingLayout->setSpacing(0);
+    onboardingLayout->addSpacerItem(topSpacer);
+    onboardingLayout->addWidget(onboardingTopLabel);
+    onboardingLayout->addLayout(onboardingSublayout);
+
+    onboardingSublayout->setContentsMargins(0, 0, 0, 0);
+    onboardingSublayout->setSpacing(0);
+    onboardingSublayout->addSpacerItem(leftSpacer);
+
+    onboardingBottomLabel->setAlignment(Qt::AlignRight | Qt::AlignTop);
+    onboardingBottomLabel->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    onboardingSublayout->addWidget(onboardingBottomLabel);
+    onboardingBottomLabel->setText(tr("To edit the transition settings, click "));
+
+    onboardingBottomIcon->setAlignment(Qt::AlignLeft | Qt::AlignTop);
+    onboardingBottomIcon->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    onboardingSublayout->addWidget(onboardingBottomIcon);
+    onboardingBottomIcon->setPixmap(TimelineIcons::ANIMATION.pixmap());
+
+    onboardingSublayout->addSpacerItem(rightSpacer);
+    onboardingLayout->addSpacerItem(bottomSpacer);
+
+    widgetLayout->addLayout(contentLayout);
+    this->setLayout(widgetLayout);
+
+    connectToolbar();
+
+    auto setScrollOffset = [this]() { graphicsScene()->setScrollOffset(m_scrollbar->value()); };
+    connect(m_scrollbar, &QSlider::valueChanged, this, setScrollOffset);
+
+    connect(graphicsScene(),
+            &TransitionEditorGraphicsScene::statusBarMessageChanged,
+            this,
+            [this](const QString &message) { m_statusBar->setText(message); });
+
+    connect(m_addButton, &QPushButton::clicked, this, [this]() {
+        m_transitionEditorView->addNewTransition();
+    });
+}
+
+void TransitionEditorWidget::setTransitionActive(bool b)
+{
+    if (b) {
+        m_toolbar->setVisible(true);
+        m_graphicsView->setVisible(true);
+        m_rulerView->setVisible(true);
+        m_scrollbar->setVisible(true);
+        m_addButton->setVisible(false);
+        m_onboardingContainer->setVisible(false);
+        m_graphicsView->update();
+        m_rulerView->update();
+    } else {
+        m_toolbar->setVisible(false);
+        m_graphicsView->setVisible(false);
+        m_rulerView->setVisible(false);
+        m_scrollbar->setVisible(false);
+        m_addButton->setVisible(true);
+        m_onboardingContainer->setVisible(true);
+    }
+}
+
+void TransitionEditorWidget::connectToolbar()
+{
+    connect(graphicsScene(),
+            &TransitionEditorGraphicsScene::selectionChanged,
+            this,
+            &TransitionEditorWidget::selectionChanged);
+
+    connect(m_toolbar,
+            &TransitionEditorToolBar::openEasingCurveEditor,
+            this,
+            &TransitionEditorWidget::openEasingCurveEditor);
+
+    connect(graphicsScene(),
+            &TransitionEditorGraphicsScene::scroll,
+            this,
+            &TransitionEditorWidget::scroll);
+
+    auto setRulerScaling = [this](int val) { m_graphicsScene->setRulerScaling(val); };
+    connect(m_toolbar, &TransitionEditorToolBar::scaleFactorChanged, setRulerScaling);
+
+    auto setDuration = [this](int end) { graphicsScene()->setDuration(end); };
+    connect(m_toolbar, &TransitionEditorToolBar::durationChanged, setDuration);
+
+    connect(m_toolbar,
+            &TransitionEditorToolBar::settingDialogClicked,
+            transitionEditorView(),
+            &TransitionEditorView::openSettingsDialog);
+
+    connect(m_toolbar,
+            &TransitionEditorToolBar::currentTransitionChanged,
+            this,
+            [this](const QString &transitionName) {
+                const ModelNode transition = transitionEditorView()->modelNodeForId(transitionName);
+                if (transition.isValid()) {
+                    m_graphicsScene->setTransition(transition);
+                }
+            });
+}
+
+void TransitionEditorWidget::changeScaleFactor(int factor)
+{
+    m_toolbar->setScaleFactor(factor);
+}
+
+void TransitionEditorWidget::scroll(const TimelineUtils::Side &side)
+{
+    if (side == TimelineUtils::Side::Left)
+        m_scrollbar->setValue(m_scrollbar->value() - m_scrollbar->singleStep());
+    else if (side == TimelineUtils::Side::Right)
+        m_scrollbar->setValue(m_scrollbar->value() + m_scrollbar->singleStep());
+}
+
+void TransitionEditorWidget::selectionChanged()
+{
+    if (graphicsScene()->selectedPropertyItem() != nullptr)
+        m_toolbar->setActionEnabled("Curve Picker", true);
+    else
+        m_toolbar->setActionEnabled("Curve Picker", false);
+}
+
+void TransitionEditorWidget::contextHelp(const Core::IContext::HelpCallback &callback) const
+{
+    if (transitionEditorView())
+        transitionEditorView()->contextHelp(callback);
+    else
+        callback({});
+}
+
+void TransitionEditorWidget::init()
+{
+    ModelNode root = transitionEditorView()->rootModelNode();
+    ModelNode transition;
+
+    if (root.isValid() && root.hasProperty("transitions")) {
+        NodeAbstractProperty transitions = root.nodeAbstractProperty("transitions");
+        if (transitions.isValid())
+            transition = transitions.directSubNodes().first();
+    }
+
+    m_graphicsScene->setTransition(transition);
+    setTransitionActive(transition.isValid());
+
+    m_graphicsScene->setWidth(m_graphicsView->viewport()->width());
+
+    m_toolbar->setScaleFactor(0);
+
+    m_toolbar->setCurrentTransition(transition);
+
+    qreal duration = 2000;
+    if (transition.isValid() && transition.hasAuxiliaryData("transitionDuration"))
+        duration = transition.auxiliaryData("transitionDuration").toDouble();
+
+    m_toolbar->setDuration(duration);
+
+    m_graphicsScene->setRulerScaling(0);
+}
+
+void TransitionEditorWidget::updateData(const ModelNode &transition)
+{
+    if (!transition.isValid()) {
+        init();
+        return;
+    }
+
+    if (transition.metaInfo().isValid()
+        && transition.metaInfo().isSubclassOf("QtQuick.Transition")) {
+        if (transition.id() == m_toolbar->currentTransitionId()) {
+            m_graphicsScene->setTransition(transition);
+        } else {
+            m_toolbar->updateComboBox(transition.view()->rootModelNode());
+        }
+    }
+}
+
+void TransitionEditorWidget::reset()
+{
+    graphicsScene()->clearTransition();
+    m_toolbar->reset();
+    m_statusBar->clear();
+}
+
+TransitionEditorGraphicsScene *TransitionEditorWidget::graphicsScene() const
+{
+    return m_graphicsScene;
+}
+
+TransitionEditorToolBar *TransitionEditorWidget::toolBar() const
+{
+    return m_toolbar;
+}
+
+void TransitionEditorWidget::setupScrollbar(int min, int max, int current)
+{
+    bool b = m_scrollbar->blockSignals(true);
+    m_scrollbar->setMinimum(min);
+    m_scrollbar->setMaximum(max);
+    m_scrollbar->setValue(current);
+    m_scrollbar->setSingleStep((max - min) / 10);
+    m_scrollbar->blockSignals(b);
+}
+
+void TransitionEditorWidget::showEvent(QShowEvent *event)
+{
+    Q_UNUSED(event)
+    graphicsScene()->setWidth(m_graphicsView->viewport()->width());
+    graphicsScene()->invalidateLayout();
+    graphicsScene()->invalidate();
+    graphicsScene()->onShow();
+}
+
+void TransitionEditorWidget::resizeEvent(QResizeEvent *event)
+{
+    QWidget::resizeEvent(event);
+    graphicsScene()->setWidth(m_graphicsView->viewport()->width());
+}
+
+TransitionEditorView *TransitionEditorWidget::transitionEditorView() const
+{
+    return m_transitionEditorView;
+}
+
+void TransitionEditorWidget::openEasingCurveEditor()
+{
+    if (TransitionEditorPropertyItem *item = graphicsScene()->selectedPropertyItem()) {
+        QList<ModelNode> animations;
+        animations.append(item->propertyAnimation());
+        EasingCurveDialog::runDialog(animations, Core::ICore::dialogParent());
+    }
+}
+
+} // namespace QmlDesigner