diff --git a/QtGameMaker.pro b/QtGameMaker.pro
index ce0494b..d0e57ec 100644
--- a/QtGameMaker.pro
+++ b/QtGameMaker.pro
@@ -1,7 +1,10 @@
 QT = core gui widgets multimedia
 
 CONFIG += c++latest
-QMAKE_CXXFLAGS += -std=c++23
+QMAKE_CXXFLAGS += \
+    -std=c++23 \
+    -Wno-missing-field-initializers \
+    -Wno-sign-compare
 
 DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000
 
@@ -13,6 +16,7 @@ HEADERS += \
     dialogs/fontpropertiesdialog.h \
     dialogs/imageeditordialog.h \
     dialogs/includedfilesdialog.h \
+    dialogs/installextensiondialog.h \
     dialogs/maskpropertiesdialog.h \
     dialogs/objectinformationdialog.h \
     dialogs/objectpropertiesdialog.h \
@@ -28,6 +32,8 @@ HEADERS += \
     includedfilesmodel.h \
     jshighlighter.h \
     mainwindow.h \
+    objectactionsmodel.h \
+    objecteventsmodel.h \
     pathpointsmodel.h \
     pathpointswidget.h \
     projectcontainer.h \
@@ -41,6 +47,8 @@ HEADERS += \
     dialogs/soundpropertiesdialog.h \
     dialogs/spritepropertiesdialog.h \
     spritesmodel.h \
+    timelineactionsmodel.h \
+    timelinemomentsmodel.h \
     triggersmodel.h
 
 SOURCES += main.cpp \
@@ -51,6 +59,7 @@ SOURCES += main.cpp \
     dialogs/fontpropertiesdialog.cpp \
     dialogs/imageeditordialog.cpp \
     dialogs/includedfilesdialog.cpp \
+    dialogs/installextensiondialog.cpp \
     dialogs/maskpropertiesdialog.cpp \
     dialogs/objectinformationdialog.cpp \
     dialogs/objectpropertiesdialog.cpp \
@@ -65,6 +74,8 @@ SOURCES += main.cpp \
     includedfilesmodel.cpp \
     jshighlighter.cpp \
     mainwindow.cpp \
+    objectactionsmodel.cpp \
+    objecteventsmodel.cpp \
     pathpointsmodel.cpp \
     pathpointswidget.cpp \
     projectcontainer.cpp \
@@ -78,6 +89,8 @@ SOURCES += main.cpp \
     dialogs/soundpropertiesdialog.cpp \
     dialogs/spritepropertiesdialog.cpp \
     spritesmodel.cpp \
+    timelineactionsmodel.cpp \
+    timelinemomentsmodel.cpp \
     triggersmodel.cpp
 
 FORMS += \
@@ -86,6 +99,7 @@ FORMS += \
     dialogs/fontpropertiesdialog.ui \
     dialogs/imageeditordialog.ui \
     dialogs/includedfilesdialog.ui \
+    dialogs/installextensiondialog.ui \
     dialogs/maskpropertiesdialog.ui \
     dialogs/objectinformationdialog.ui \
     dialogs/objectpropertiesdialog.ui \
diff --git a/codeeditorwidget.cpp b/codeeditorwidget.cpp
index 9dc5cd0..96f0a06 100644
--- a/codeeditorwidget.cpp
+++ b/codeeditorwidget.cpp
@@ -21,6 +21,7 @@ CodeEditorWidget::CodeEditorWidget(QWidget *parent) :
 
 void CodeEditorWidget::updateLineNumberAreaWidth(int newBlockCount)
 {
+    Q_UNUSED(newBlockCount)
     setViewportMargins(lineNumberAreaWidth(), 0, 0, 0);
 }
 
diff --git a/constantsmodel.cpp b/constantsmodel.cpp
index 0a41401..04e9c24 100644
--- a/constantsmodel.cpp
+++ b/constantsmodel.cpp
@@ -18,16 +18,20 @@ ConstantsModel::ConstantsModel(ProjectContainer &project, QObject *parent) :
 
 int ConstantsModel::rowCount(const QModelIndex &parent) const
 {
+    Q_UNUSED(parent)
     return 0;
 }
 
 int ConstantsModel::columnCount(const QModelIndex &parent) const
 {
+    Q_UNUSED(parent)
     return NumberOfColumns;
 }
 
 QVariant ConstantsModel::data(const QModelIndex &index, int role) const
 {
+    Q_UNUSED(index)
+    Q_UNUSED(role)
     return {};
 }
 
diff --git a/dialogs/backgroundpropertiesdialog.cpp b/dialogs/backgroundpropertiesdialog.cpp
index 7f49bb8..2f02bca 100644
--- a/dialogs/backgroundpropertiesdialog.cpp
+++ b/dialogs/backgroundpropertiesdialog.cpp
@@ -32,11 +32,11 @@ BackgroundPropertiesDialog::BackgroundPropertiesDialog(Background &background, P
     connect(&m_projectModel, &ProjectTreeModel::backgroundNameChanged,
             this, &BackgroundPropertiesDialog::backgroundNameChanged);
 
-    connect(m_ui->pushButtonLoad, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonLoad, &QAbstractButton::clicked,
             this, &BackgroundPropertiesDialog::loadBackground);
-    connect(m_ui->pushButtonSave, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonSave, &QAbstractButton::clicked,
             this, &BackgroundPropertiesDialog::saveBackground);
-    connect(m_ui->pushButtonEdit, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonEdit, &QAbstractButton::clicked,
             this, &BackgroundPropertiesDialog::editBackground);
 
     connect(m_ui->lineEditName, &QLineEdit::textChanged,
diff --git a/dialogs/backgroundpropertiesdialog.h b/dialogs/backgroundpropertiesdialog.h
index 32b4f1e..f88d63f 100644
--- a/dialogs/backgroundpropertiesdialog.h
+++ b/dialogs/backgroundpropertiesdialog.h
@@ -4,7 +4,6 @@
 #include <QString>
 
 #include <memory>
-#include <optional>
 
 namespace Ui { class BackgroundPropertiesDialog; }
 struct Background;
diff --git a/dialogs/codeeditordialog.cpp b/dialogs/codeeditordialog.cpp
index 12c943a..3af08a8 100644
--- a/dialogs/codeeditordialog.cpp
+++ b/dialogs/codeeditordialog.cpp
@@ -5,16 +5,21 @@
 #include <QFont>
 #include <QLabel>
 #include <QTextBlock>
+#include <QMessageBox>
+#include <QSignalBlocker>
 
 #include "jshighlighter.h"
 
-CodeEditorDialog::CodeEditorDialog(QWidget *parent) :
+CodeEditorDialog::CodeEditorDialog(const QString &title, QWidget *parent) :
     QDialog{parent},
     m_ui{std::make_unique<Ui::CodeEditorDialog>()},
+    m_title{title},
     m_labelPosition{new QLabel{this}}
 {
     m_ui->setupUi(this);
 
+    updateTitle();
+
     m_labelPosition->setFrameStyle(QFrame::Sunken);
     m_ui->statusbar->addWidget(m_labelPosition);
 
@@ -37,6 +42,8 @@ CodeEditorDialog::CodeEditorDialog(QWidget *parent) :
     connect(m_ui->actionPrint, &QAction::triggered,
             this, &CodeEditorDialog::print);
 
+    connect(m_ui->codeEdit, &QPlainTextEdit::textChanged,
+            this, &CodeEditorDialog::changed);
     connect(m_ui->codeEdit, &QPlainTextEdit::textChanged,
             this, &CodeEditorDialog::updatePosition);
     connect(m_ui->codeEdit, &QPlainTextEdit::cursorPositionChanged,
@@ -45,6 +52,72 @@ CodeEditorDialog::CodeEditorDialog(QWidget *parent) :
 
 CodeEditorDialog::~CodeEditorDialog() = default;
 
+void CodeEditorDialog::accept()
+{
+    if (!m_unsavedChanges)
+    {
+        QDialog::reject();
+        return;
+    }
+
+    QDialog::accept();
+}
+
+void CodeEditorDialog::reject()
+{
+    if (!m_unsavedChanges)
+    {
+        QDialog::reject();
+        return;
+    }
+
+    const auto result = QMessageBox::warning(
+        this,
+        tr("The Script has been modified."),
+        tr("Do you want to save your changes?"),
+        QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel,
+        QMessageBox::Save
+        );
+    switch (result)
+    {
+    case QMessageBox::Save:
+        accept();
+        return;
+    case QMessageBox::Discard:
+        QDialog::reject();
+        return;
+    case QMessageBox::Cancel:
+        return;
+    default:
+        qWarning() << "unexpected dialog result" << result;
+    }
+}
+
+QString CodeEditorDialog::script() const
+{
+    return m_ui->codeEdit->toPlainText();
+}
+
+void CodeEditorDialog::setScript(const QString &script)
+{
+    QSignalBlocker blocker{m_ui->codeEdit};
+    m_ui->codeEdit->setPlainText(script);
+}
+
+void CodeEditorDialog::changed()
+{
+    if (!m_unsavedChanges)
+    {
+        m_unsavedChanges = true;
+        updateTitle();
+    }
+}
+
+void CodeEditorDialog::addToolbarWidget(QWidget *widget)
+{
+    m_ui->toolBar->addWidget(widget);
+}
+
 void CodeEditorDialog::load()
 {
 
@@ -82,3 +155,11 @@ void CodeEditorDialog::updatePosition()
 
     m_labelPosition->setText(tr("%0/%1: %2").arg(lines).arg(m_ui->codeEdit->blockCount()).arg(position));
 }
+
+void CodeEditorDialog::updateTitle()
+{
+    setWindowTitle(tr("%0%1")
+                       .arg(m_title)
+                       .arg(m_unsavedChanges ? tr("*") : QString{})
+                   );
+}
diff --git a/dialogs/codeeditordialog.h b/dialogs/codeeditordialog.h
index 2958080..1dfafa2 100644
--- a/dialogs/codeeditordialog.h
+++ b/dialogs/codeeditordialog.h
@@ -12,9 +12,26 @@ class CodeEditorDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit CodeEditorDialog(QWidget *parent = nullptr);
+    explicit CodeEditorDialog(const QString &title, QWidget *parent = nullptr);
     ~CodeEditorDialog();
 
+    void accept() override;
+    void reject() override;
+
+    const QString &title() const { return m_title; }
+    void setTitle(const QString &title) { if (m_title == title) return; m_title = title; updateTitle(); }
+
+    QString script() const;
+    void setScript(const QString &script);
+
+protected slots:
+    void changed();
+
+protected:
+    bool m_unsavedChanges{};
+
+    void addToolbarWidget(QWidget *widget);
+
 private slots:
     void load();
     void save();
@@ -22,9 +39,12 @@ private slots:
 
     void updatePosition();
 
-protected:
+private:
+    void updateTitle();
+
     const std::unique_ptr<Ui::CodeEditorDialog> m_ui;
 
-private:
+    QString m_title;
+
     QLabel * const m_labelPosition;
 };
diff --git a/dialogs/createspritedialog.cpp b/dialogs/createspritedialog.cpp
index 1ad7527..f7702ed 100644
--- a/dialogs/createspritedialog.cpp
+++ b/dialogs/createspritedialog.cpp
@@ -10,7 +10,7 @@ CreateSpriteDialog::CreateSpriteDialog(QWidget *parent) :
     m_ui->setupUi(this);
 
 #ifdef Q_OS_LINUX
-    setWindowFlags(windowFlags() & ~Qt::Dialog | Qt::Window);
+    setWindowFlags((windowFlags() & ~Qt::Dialog) | Qt::Window);
 #endif
     setWindowFlag(Qt::WindowCloseButtonHint);
 
diff --git a/dialogs/createspritedialog.ui b/dialogs/createspritedialog.ui
index 52a2de5..aff8b14 100644
--- a/dialogs/createspritedialog.ui
+++ b/dialogs/createspritedialog.ui
@@ -36,6 +36,9 @@
          <property name="text">
           <string>Width:</string>
          </property>
+         <property name="buddy">
+          <cstring>spinBoxWidth</cstring>
+         </property>
         </widget>
        </item>
        <item row="1" column="0">
@@ -43,6 +46,9 @@
          <property name="text">
           <string>Height:</string>
          </property>
+         <property name="buddy">
+          <cstring>spinBoxHeight</cstring>
+         </property>
         </widget>
        </item>
        <item row="0" column="1">
diff --git a/dialogs/editspritedialog.cpp b/dialogs/editspritedialog.cpp
index 68c33eb..1a26006 100644
--- a/dialogs/editspritedialog.cpp
+++ b/dialogs/editspritedialog.cpp
@@ -18,7 +18,7 @@ EditSpriteDialog::EditSpriteDialog(const std::vector<QPixmap> &pixmaps, const QS
     m_ui->setupUi(this);
 
 #ifdef Q_OS_LINUX
-    setWindowFlags(windowFlags() & ~Qt::Dialog | Qt::Window);
+    setWindowFlags((windowFlags() & ~Qt::Dialog) | Qt::Window);
 #endif
     setWindowFlag(Qt::WindowMinimizeButtonHint);
     setWindowFlag(Qt::WindowMaximizeButtonHint);
diff --git a/dialogs/extensionpackagesdialog.cpp b/dialogs/extensionpackagesdialog.cpp
index 4ca611e..e3c6b2f 100644
--- a/dialogs/extensionpackagesdialog.cpp
+++ b/dialogs/extensionpackagesdialog.cpp
@@ -1,6 +1,8 @@
 #include "extensionpackagesdialog.h"
 #include "ui_extensionpackagesdialog.h"
 
+#include "installextensiondialog.h"
+
 ExtensionPackagesDialog::ExtensionPackagesDialog(QWidget *parent) :
     QDialog{parent},
     m_ui{std::make_unique<Ui::ExtensionPackagesDialog>()}
@@ -8,7 +10,7 @@ ExtensionPackagesDialog::ExtensionPackagesDialog(QWidget *parent) :
     m_ui->setupUi(this);
 
 #ifdef Q_OS_LINUX
-    setWindowFlags(windowFlags() & ~Qt::Dialog | Qt::Window);
+    setWindowFlags((windowFlags() & ~Qt::Dialog) | Qt::Window);
 #endif
     setWindowFlag(Qt::WindowCloseButtonHint);
 
@@ -16,8 +18,19 @@ ExtensionPackagesDialog::ExtensionPackagesDialog(QWidget *parent) :
         button->setIcon(QIcon{":/qtgameengine/icons/ok.png"});
     if (auto button = m_ui->buttonBox->button(QDialogButtonBox::Cancel))
         button->setIcon(QIcon{":/qtgameengine/icons/delete.png"});
-    m_ui->buttonBox->addButton(tr("Install"), QDialogButtonBox::ActionRole)
-        ->setIcon(QIcon{":/qtgameengine/icons/extension-packages-file.png"});
+
+    if (auto button = m_ui->buttonBox->addButton(tr("Install"), QDialogButtonBox::ActionRole))
+    {
+        button->setIcon(QIcon{":/qtgameengine/icons/extension-packages-file.png"});
+        connect(button, &QAbstractButton::clicked,
+                this, &ExtensionPackagesDialog::install);
+    }
 }
 
 ExtensionPackagesDialog::~ExtensionPackagesDialog() = default;
+
+void ExtensionPackagesDialog::install()
+{
+    InstallExtensionDialog dialog{this};
+    dialog.exec();
+}
diff --git a/dialogs/extensionpackagesdialog.h b/dialogs/extensionpackagesdialog.h
index 28d09e4..56fc24a 100644
--- a/dialogs/extensionpackagesdialog.h
+++ b/dialogs/extensionpackagesdialog.h
@@ -14,6 +14,9 @@ public:
     explicit ExtensionPackagesDialog(QWidget *parent = nullptr);
     ~ExtensionPackagesDialog();
 
+private slots:
+    void install();
+
 private:
     const std::unique_ptr<Ui::ExtensionPackagesDialog> m_ui;
 };
diff --git a/dialogs/fontpropertiesdialog.cpp b/dialogs/fontpropertiesdialog.cpp
index 22ba06f..c697588 100644
--- a/dialogs/fontpropertiesdialog.cpp
+++ b/dialogs/fontpropertiesdialog.cpp
@@ -35,13 +35,13 @@ FontPropertiesDialog::FontPropertiesDialog(Font &font, ProjectTreeModel &project
     connect(&m_projectModel, &ProjectTreeModel::fontNameChanged,
             this, &FontPropertiesDialog::fontNameChanged);
 
-    connect(m_ui->pushButtonNormal, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonNormal, &QAbstractButton::clicked,
             this, &FontPropertiesDialog::normalRange);
-    connect(m_ui->pushButtonDigits, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonDigits, &QAbstractButton::clicked,
             this, &FontPropertiesDialog::digitsRange);
-    connect(m_ui->pushButtonAll, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonAll, &QAbstractButton::clicked,
             this, &FontPropertiesDialog::allRange);
-    connect(m_ui->pushButtonLetters, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonLetters, &QAbstractButton::clicked,
             this, &FontPropertiesDialog::lettersRange);
 
     connect(m_ui->lineEditName, &QLineEdit::textChanged,
@@ -64,6 +64,12 @@ FontPropertiesDialog::~FontPropertiesDialog() = default;
 
 void FontPropertiesDialog::accept()
 {
+    if (!m_unsavedChanges)
+    {
+        QDialog::reject();
+        return;
+    }
+
     if (m_font.name != m_ui->lineEditName->text())
     {
         if (!m_projectModel.rename<Font>(m_font, m_ui->lineEditName->text()))
diff --git a/dialogs/gameinformationdialog.cpp b/dialogs/gameinformationdialog.cpp
index f7f3020..0bb4fc3 100644
--- a/dialogs/gameinformationdialog.cpp
+++ b/dialogs/gameinformationdialog.cpp
@@ -8,7 +8,7 @@ GameInformationDialog::GameInformationDialog(QWidget *parent) :
     m_ui->setupUi(this);
 
 #ifdef Q_OS_LINUX
-    setWindowFlags(windowFlags() & ~Qt::Dialog | Qt::Window);
+    setWindowFlags((windowFlags() & ~Qt::Dialog) | Qt::Window);
 #endif
     setWindowFlag(Qt::WindowMinimizeButtonHint);
     setWindowFlag(Qt::WindowMaximizeButtonHint);
diff --git a/dialogs/globalgamesettingsdialog.cpp b/dialogs/globalgamesettingsdialog.cpp
index 903699b..db5ab1e 100644
--- a/dialogs/globalgamesettingsdialog.cpp
+++ b/dialogs/globalgamesettingsdialog.cpp
@@ -11,7 +11,7 @@ GlobalGameSettingsDialog::GlobalGameSettingsDialog(QWidget *parent) :
     m_ui->setupUi(this);
 
 #ifdef Q_OS_LINUX
-    setWindowFlags(windowFlags() & ~Qt::Dialog | Qt::Window);
+    setWindowFlags((windowFlags() & ~Qt::Dialog) | Qt::Window);
 #endif
     setWindowFlag(Qt::WindowCloseButtonHint);
 
diff --git a/dialogs/globalgamesettingsdialog.ui b/dialogs/globalgamesettingsdialog.ui
index f4fb4de..07c8735 100644
--- a/dialogs/globalgamesettingsdialog.ui
+++ b/dialogs/globalgamesettingsdialog.ui
@@ -106,6 +106,9 @@
            <property name="text">
             <string>Color outside the room region:</string>
            </property>
+           <property name="buddy">
+            <cstring>toolButtonColorOutside</cstring>
+           </property>
           </widget>
          </item>
          <item>
diff --git a/dialogs/imageeditordialog.cpp b/dialogs/imageeditordialog.cpp
index 58e72fc..c5bda6f 100644
--- a/dialogs/imageeditordialog.cpp
+++ b/dialogs/imageeditordialog.cpp
@@ -12,7 +12,7 @@ ImageEditorDialog::ImageEditorDialog(const QPixmap &pixmap, const QString &title
     m_ui->setupUi(this);
 
 #ifdef Q_OS_LINUX
-    setWindowFlags(windowFlags() & ~Qt::Dialog | Qt::Window);
+    setWindowFlags((windowFlags() & ~Qt::Dialog) | Qt::Window);
 #endif
     setWindowFlag(Qt::WindowMinimizeButtonHint);
     setWindowFlag(Qt::WindowMaximizeButtonHint);
diff --git a/dialogs/includedfilesdialog.ui b/dialogs/includedfilesdialog.ui
index aff0970..f36e070 100644
--- a/dialogs/includedfilesdialog.ui
+++ b/dialogs/includedfilesdialog.ui
@@ -25,35 +25,67 @@
        </widget>
       </item>
       <item>
-       <widget class="QListView" name="listView"/>
+       <widget class="QListView" name="listView">
+        <property name="toolTip">
+         <string>This is the list of files to be included when creating a stand-alone game.</string>
+        </property>
+       </widget>
       </item>
       <item>
        <layout class="QHBoxLayout" name="horizontalLayout">
         <item>
          <widget class="QPushButton" name="pushButtonAdd">
+          <property name="toolTip">
+           <string>Add a file to be included</string>
+          </property>
           <property name="text">
-           <string>Add</string>
+           <string>&amp;Add</string>
+          </property>
+          <property name="icon">
+           <iconset resource="../resources.qrc">
+            <normaloff>:/qtgameengine/icons/add.png</normaloff>:/qtgameengine/icons/add.png</iconset>
           </property>
          </widget>
         </item>
         <item>
          <widget class="QPushButton" name="pushButtonChange">
+          <property name="toolTip">
+           <string>Change the properties of the included file</string>
+          </property>
           <property name="text">
-           <string>Change</string>
+           <string>&amp;Change</string>
+          </property>
+          <property name="icon">
+           <iconset resource="../resources.qrc">
+            <normaloff>:/qtgameengine/icons/replace.png</normaloff>:/qtgameengine/icons/replace.png</iconset>
           </property>
          </widget>
         </item>
         <item>
          <widget class="QPushButton" name="pushButtonDelete">
+          <property name="toolTip">
+           <string>Delete the indicated included file</string>
+          </property>
           <property name="text">
-           <string>Delete</string>
+           <string>&amp;Delete</string>
+          </property>
+          <property name="icon">
+           <iconset resource="../resources.qrc">
+            <normaloff>:/qtgameengine/icons/delete.png</normaloff>:/qtgameengine/icons/delete.png</iconset>
           </property>
          </widget>
         </item>
         <item>
          <widget class="QPushButton" name="pushButtonClear">
+          <property name="toolTip">
+           <string>Clear the list of included files</string>
+          </property>
           <property name="text">
-           <string>Clear</string>
+           <string>&amp;Clear</string>
+          </property>
+          <property name="icon">
+           <iconset resource="../resources.qrc">
+            <normaloff>:/qtgameengine/icons/new.png</normaloff>:/qtgameengine/icons/new.png</iconset>
           </property>
          </widget>
         </item>
@@ -74,7 +106,9 @@
    </item>
   </layout>
  </widget>
- <resources/>
+ <resources>
+  <include location="../resources.qrc"/>
+ </resources>
  <connections>
   <connection>
    <sender>buttonBox</sender>
diff --git a/dialogs/installextensiondialog.cpp b/dialogs/installextensiondialog.cpp
new file mode 100644
index 0000000..fb050a4
--- /dev/null
+++ b/dialogs/installextensiondialog.cpp
@@ -0,0 +1,16 @@
+#include "installextensiondialog.h"
+#include "ui_installextensiondialog.h"
+
+InstallExtensionDialog::InstallExtensionDialog(QWidget *parent) :
+    QDialog{parent},
+    m_ui{std::make_unique<Ui::InstallExtensionDialog>()}
+{
+    m_ui->setupUi(this);
+
+#ifdef Q_OS_LINUX
+    setWindowFlags((windowFlags() & ~Qt::Dialog) | Qt::Window);
+#endif
+    setWindowFlag(Qt::WindowCloseButtonHint);
+}
+
+InstallExtensionDialog::~InstallExtensionDialog() = default;
diff --git a/dialogs/installextensiondialog.h b/dialogs/installextensiondialog.h
new file mode 100644
index 0000000..6fa63a8
--- /dev/null
+++ b/dialogs/installextensiondialog.h
@@ -0,0 +1,19 @@
+#pragma once
+
+#include <QDialog>
+
+#include <memory>
+
+namespace Ui { class InstallExtensionDialog; }
+
+class InstallExtensionDialog : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit InstallExtensionDialog(QWidget *parent = nullptr);
+    ~InstallExtensionDialog();
+
+private:
+    const std::unique_ptr<Ui::InstallExtensionDialog> m_ui;
+};
diff --git a/dialogs/installextensiondialog.ui b/dialogs/installextensiondialog.ui
new file mode 100644
index 0000000..2d02a46
--- /dev/null
+++ b/dialogs/installextensiondialog.ui
@@ -0,0 +1,78 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>InstallExtensionDialog</class>
+ <widget class="QDialog" name="InstallExtensionDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Installing Extension Packages</string>
+  </property>
+  <layout class="QHBoxLayout" name="horizontalLayout" stretch="1,0">
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout">
+     <item>
+      <widget class="QLabel" name="labelInstalledPackages">
+       <property name="text">
+        <string>Installed Packages:</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QListView" name="listView"/>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Ok</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>InstallExtensionDialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>350</x>
+     <y>149</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>199</x>
+     <y>149</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>InstallExtensionDialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>350</x>
+     <y>149</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>199</x>
+     <y>149</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>
diff --git a/dialogs/maskpropertiesdialog.cpp b/dialogs/maskpropertiesdialog.cpp
index 389a3f2..693192f 100644
--- a/dialogs/maskpropertiesdialog.cpp
+++ b/dialogs/maskpropertiesdialog.cpp
@@ -8,7 +8,7 @@ MaskPropertiesDialog::MaskPropertiesDialog(QWidget *parent) :
     m_ui->setupUi(this);
 
 #ifdef Q_OS_LINUX
-    setWindowFlags(windowFlags() & ~Qt::Dialog | Qt::Window);
+    setWindowFlags((windowFlags() & ~Qt::Dialog) | Qt::Window);
 #endif
     setWindowFlag(Qt::WindowCloseButtonHint);
 }
diff --git a/dialogs/objectpropertiesdialog.cpp b/dialogs/objectpropertiesdialog.cpp
index 5c34295..63ea67e 100644
--- a/dialogs/objectpropertiesdialog.cpp
+++ b/dialogs/objectpropertiesdialog.cpp
@@ -1,11 +1,228 @@
 #include "objectpropertiesdialog.h"
 #include "ui_objectpropertiesdialog.h"
 
+#include <QMenu>
+#include <QDebug>
+#include <QMessageBox>
+
+#include <algorithm>
+
+#include "projectcontainer.h"
+#include "projecttreemodel.h"
+#include "objecteventsmodel.h"
+#include "objectactionsmodel.h"
+
 ObjectPropertiesDialog::ObjectPropertiesDialog(Object &object, ProjectTreeModel &projectModel, QWidget *parent) :
     QDialog{parent},
-    m_ui{std::make_unique<Ui::ObjectPropertiesDialog>()}
+    m_ui{std::make_unique<Ui::ObjectPropertiesDialog>()},
+    m_object{object},
+    m_projectModel{projectModel},
+    m_eventsModel{std::make_unique<ObjectEventsModel>()},
+    m_actionsModel{std::make_unique<ObjectActionsModel>()},
+    m_spritesMenu{new QMenu{m_ui->toolButtonSprite}},
+    m_spriteName{object.spriteName}
 {
     m_ui->setupUi(this);
+
+    updateTitle();
+
+    if (auto button = m_ui->buttonBox->button(QDialogButtonBox::Ok))
+        button->setIcon(QIcon{":/qtgameengine/icons/ok.png"});
+    if (auto button = m_ui->buttonBox->button(QDialogButtonBox::Cancel))
+        button->setIcon(QIcon{":/qtgameengine/icons/delete.png"});
+
+    m_ui->lineEditName->setText(m_object.name);
+    m_ui->lineEditSprite->setText(m_spriteName.isEmpty() ? tr("<no sprite>") : m_spriteName);
+    if (!m_spriteName.isEmpty())
+    {
+        const auto &sprites = m_projectModel.project()->sprites;
+        const auto iter = std::find_if(std::cbegin(sprites), std::cend(sprites),
+                                       [&](const Sprite &sprite){ return sprite.name == m_spriteName; });
+        if (iter == std::cend(sprites))
+            qWarning() << "sprite" << m_spriteName << "not found";
+        else
+            m_ui->labelSpritePreview->setPixmap(iter->pixmaps.empty() ? QPixmap{} : iter->pixmaps.front().scaled(m_ui->labelSpritePreview->size(), Qt::KeepAspectRatio));
+    }
+    m_ui->toolButtonSprite->setMenu(m_spritesMenu);
+    m_ui->checkBoxVisible->setChecked(m_object.visible);
+    m_ui->checkBoxSolid->setChecked(m_object.solid);
+    m_ui->spinBoxDepth->setValue(m_object.depth);
+    m_ui->checkBoxPersistent->setChecked(m_object.persistent);
+
+    m_ui->listViewEvents->setModel(m_eventsModel.get());
+
+    connect(&m_projectModel, &ProjectTreeModel::objectNameChanged,
+            this, &ObjectPropertiesDialog::objectNameChanged);
+
+    connect(m_ui->pushButtonNewSprite, &QAbstractButton::clicked,
+            this, &ObjectPropertiesDialog::newSprite);
+    connect(m_ui->pushButtonEditSprite, &QAbstractButton::clicked,
+            this, &ObjectPropertiesDialog::editSprite);
+    connect(m_ui->pushButtonShowInformation, &QAbstractButton::clicked,
+            this, &ObjectPropertiesDialog::showInformation);
+    connect(m_ui->pushButtonAddEvent, &QAbstractButton::clicked,
+            this, &ObjectPropertiesDialog::addEvent);
+    connect(m_ui->pushButtonDeleteEvent, &QAbstractButton::clicked,
+            this, &ObjectPropertiesDialog::deleteEvent);
+    connect(m_ui->pushButtonChangeEvent, &QAbstractButton::clicked,
+            this, &ObjectPropertiesDialog::replaceEvent);
+
+    connect(m_ui->lineEditName, &QLineEdit::textChanged,
+            this, &ObjectPropertiesDialog::changed);
+    connect(m_ui->checkBoxVisible, &QCheckBox::toggled,
+            this, &ObjectPropertiesDialog::changed);
+    connect(m_ui->checkBoxSolid, &QCheckBox::toggled,
+            this, &ObjectPropertiesDialog::changed);
+    connect(m_ui->spinBoxDepth, &QSpinBox::valueChanged,
+            this, &ObjectPropertiesDialog::changed);
+    connect(m_ui->checkBoxPersistent, &QCheckBox::toggled,
+            this, &ObjectPropertiesDialog::changed);
+
+    connect(m_spritesMenu, &QMenu::aboutToShow,
+            this, &ObjectPropertiesDialog::spritesMenuAboutToShow);
 }
 
 ObjectPropertiesDialog::~ObjectPropertiesDialog() = default;
+
+void ObjectPropertiesDialog::accept()
+{
+    if (!m_unsavedChanges)
+    {
+        QDialog::reject();
+        return;
+    }
+
+    if (m_object.name != m_ui->lineEditName->text())
+    {
+        if (!m_projectModel.rename<Object>(m_object, m_ui->lineEditName->text()))
+        {
+            QMessageBox::critical(this, tr("Renaming Object failed!"), tr("Renaming Object failed!"));
+            return;
+        }
+    }
+
+    m_object.spriteName = m_spriteName;
+    m_object.visible = m_ui->checkBoxVisible->isChecked();
+    m_object.solid = m_ui->checkBoxSolid->isChecked();
+    m_object.depth = m_ui->spinBoxDepth->value();
+    m_object.persistent = m_ui->checkBoxPersistent->isChecked();
+
+    QDialog::accept();
+}
+
+void ObjectPropertiesDialog::reject()
+{
+    if (!m_unsavedChanges)
+    {
+        QDialog::reject();
+        return;
+    }
+
+    const auto result = QMessageBox::warning(
+        this,
+        tr("The Object has been modified."),
+        tr("Do you want to save your changes?"),
+        QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel,
+        QMessageBox::Save
+    );
+    switch (result)
+    {
+    case QMessageBox::Save:
+        accept();
+        return;
+    case QMessageBox::Discard:
+        QDialog::reject();
+        return;
+    case QMessageBox::Cancel:
+        return;
+    default:
+        qWarning() << "unexpected dialog result" << result;
+    }
+}
+
+void ObjectPropertiesDialog::newSprite()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void ObjectPropertiesDialog::editSprite()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void ObjectPropertiesDialog::showInformation()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void ObjectPropertiesDialog::addEvent()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void ObjectPropertiesDialog::deleteEvent()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void ObjectPropertiesDialog::replaceEvent()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void ObjectPropertiesDialog::changed()
+{
+    if (!m_unsavedChanges)
+    {
+        m_unsavedChanges = true;
+        updateTitle();
+    }
+}
+
+void ObjectPropertiesDialog::objectNameChanged(const Object &object)
+{
+    if (&object != &m_object)
+        return;
+
+    {
+        QSignalBlocker blocker{m_ui->lineEditName};
+        m_ui->lineEditName->setText(object.name);
+    }
+
+    updateTitle();
+}
+
+void ObjectPropertiesDialog::spritesMenuAboutToShow()
+{
+    m_spritesMenu->clear();
+    m_spritesMenu->addAction(tr("<no sprite>"), this, &ObjectPropertiesDialog::clearSprite);
+    for (const auto &sprite : m_projectModel.project()->sprites)
+        m_spritesMenu->addAction(sprite.pixmaps.empty() ? QPixmap{} : sprite.pixmaps.front(),
+                                 sprite.name,
+                                 this,
+                                 [&sprite,this](){ setSprite(sprite); });
+}
+
+void ObjectPropertiesDialog::clearSprite()
+{
+    m_ui->labelSpritePreview->setPixmap(QPixmap{});
+    m_ui->lineEditSprite->setText(tr("<no sprite>"));
+    m_spriteName = QString{};
+    changed();
+}
+
+void ObjectPropertiesDialog::setSprite(const Sprite &sprite)
+{
+    m_ui->labelSpritePreview->setPixmap(sprite.pixmaps.empty() ? QPixmap{} : sprite.pixmaps.front().scaled(m_ui->labelSpritePreview->size(), Qt::KeepAspectRatio));
+    m_ui->lineEditSprite->setText(sprite.name);
+    m_spriteName = sprite.name;
+    changed();
+}
+
+void ObjectPropertiesDialog::updateTitle()
+{
+    setWindowTitle(tr("Object Properties: %0%1")
+                       .arg(m_object.name)
+                       .arg(m_unsavedChanges ? tr("*") : QString{})
+                   );
+}
diff --git a/dialogs/objectpropertiesdialog.h b/dialogs/objectpropertiesdialog.h
index be33e33..0404614 100644
--- a/dialogs/objectpropertiesdialog.h
+++ b/dialogs/objectpropertiesdialog.h
@@ -4,9 +4,13 @@
 
 #include <memory>
 
+class QMenu;
 namespace Ui { class ObjectPropertiesDialog; }
 struct Object;
 class ProjectTreeModel;
+class ObjectEventsModel;
+class ObjectActionsModel;
+class Sprite;
 
 class ObjectPropertiesDialog : public QDialog
 {
@@ -16,6 +20,40 @@ public:
     explicit ObjectPropertiesDialog(Object &object, ProjectTreeModel &projectModel, QWidget *parent = nullptr);
     ~ObjectPropertiesDialog();
 
+    void accept() override;
+    void reject() override;
+
+private slots:
+    void newSprite();
+    void editSprite();
+    void showInformation();
+    void addEvent();
+    void deleteEvent();
+    void replaceEvent();
+
+    void changed();
+
+    void objectNameChanged(const Object &object);
+
+    void spritesMenuAboutToShow();
+
+    void clearSprite();
+    void setSprite(const Sprite &sprite);
+
 private:
+    void updateTitle();
+
     const std::unique_ptr<Ui::ObjectPropertiesDialog> m_ui;
+
+    Object &m_object;
+    ProjectTreeModel &m_projectModel;
+
+    const std::unique_ptr<ObjectEventsModel> m_eventsModel;
+    const std::unique_ptr<ObjectActionsModel> m_actionsModel;
+
+    QMenu * const m_spritesMenu;
+
+    QString m_spriteName;
+
+    bool m_unsavedChanges{};
 };
diff --git a/dialogs/objectpropertiesdialog.ui b/dialogs/objectpropertiesdialog.ui
index 139e94c..8fc8052 100644
--- a/dialogs/objectpropertiesdialog.ui
+++ b/dialogs/objectpropertiesdialog.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>400</width>
-    <height>300</height>
+    <width>794</width>
+    <height>466</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -17,9 +17,473 @@
    <iconset resource="../resources.qrc">
     <normaloff>:/qtgameengine/icons/object-file.png</normaloff>:/qtgameengine/icons/object-file.png</iconset>
   </property>
+  <layout class="QHBoxLayout" name="horizontalLayout_4" stretch="0,0,1,0">
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout">
+     <item>
+      <layout class="QFormLayout" name="formLayout">
+       <item row="0" column="0">
+        <widget class="QLabel" name="labelName">
+         <property name="text">
+          <string>Name:</string>
+         </property>
+         <property name="buddy">
+          <cstring>lineEditName</cstring>
+         </property>
+        </widget>
+       </item>
+       <item row="0" column="1">
+        <widget class="QLineEdit" name="lineEditName">
+         <property name="sizePolicy">
+          <sizepolicy hsizetype="Ignored" vsizetype="Fixed">
+           <horstretch>0</horstretch>
+           <verstretch>0</verstretch>
+          </sizepolicy>
+         </property>
+         <property name="toolTip">
+          <string>The name of the object</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+     <item>
+      <widget class="QGroupBox" name="groupBoxSprite">
+       <property name="title">
+        <string>Sprite</string>
+       </property>
+       <layout class="QHBoxLayout" name="horizontalLayout_6">
+        <item>
+         <widget class="QLabel" name="labelSpritePreview">
+          <property name="minimumSize">
+           <size>
+            <width>32</width>
+            <height>0</height>
+           </size>
+          </property>
+          <property name="maximumSize">
+           <size>
+            <width>32</width>
+            <height>16777215</height>
+           </size>
+          </property>
+          <property name="alignment">
+           <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <layout class="QVBoxLayout" name="verticalLayout_4">
+          <item>
+           <layout class="QHBoxLayout" name="horizontalLayout_7">
+            <item>
+             <widget class="QLineEdit" name="lineEditSprite">
+              <property name="toolTip">
+               <string>The sprite used to represent the object</string>
+              </property>
+              <property name="readOnly">
+               <bool>true</bool>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <widget class="QToolButton" name="toolButtonSprite">
+              <property name="text">
+               <string>...</string>
+              </property>
+              <property name="popupMode">
+               <enum>QToolButton::InstantPopup</enum>
+              </property>
+             </widget>
+            </item>
+           </layout>
+          </item>
+          <item>
+           <layout class="QHBoxLayout" name="horizontalLayout_8">
+            <item>
+             <widget class="QPushButton" name="pushButtonNewSprite">
+              <property name="sizePolicy">
+               <sizepolicy hsizetype="Ignored" vsizetype="Fixed">
+                <horstretch>0</horstretch>
+                <verstretch>0</verstretch>
+               </sizepolicy>
+              </property>
+              <property name="toolTip">
+               <string>Create a new sprite for this object</string>
+              </property>
+              <property name="text">
+               <string>New</string>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <widget class="QPushButton" name="pushButtonEditSprite">
+              <property name="sizePolicy">
+               <sizepolicy hsizetype="Ignored" vsizetype="Fixed">
+                <horstretch>0</horstretch>
+                <verstretch>0</verstretch>
+               </sizepolicy>
+              </property>
+              <property name="toolTip">
+               <string>Edit the sprite for this object</string>
+              </property>
+              <property name="text">
+               <string>Edit</string>
+              </property>
+             </widget>
+            </item>
+           </layout>
+          </item>
+         </layout>
+        </item>
+       </layout>
+      </widget>
+     </item>
+     <item>
+      <layout class="QHBoxLayout" name="horizontalLayout">
+       <item>
+        <widget class="QCheckBox" name="checkBoxVisible">
+         <property name="toolTip">
+          <string>Whether the object is visible</string>
+         </property>
+         <property name="text">
+          <string>Visible</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QCheckBox" name="checkBoxSolid">
+         <property name="toolTip">
+          <string>Whether the object is solid</string>
+         </property>
+         <property name="text">
+          <string>Solid</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+     <item>
+      <layout class="QFormLayout" name="formLayout_2">
+       <item row="0" column="0">
+        <widget class="QLabel" name="labelDepth">
+         <property name="text">
+          <string>Depth:</string>
+         </property>
+         <property name="buddy">
+          <cstring>spinBoxDepth</cstring>
+         </property>
+        </widget>
+       </item>
+       <item row="0" column="1">
+        <widget class="QSpinBox" name="spinBoxDepth">
+         <property name="sizePolicy">
+          <sizepolicy hsizetype="Ignored" vsizetype="Fixed">
+           <horstretch>0</horstretch>
+           <verstretch>0</verstretch>
+          </sizepolicy>
+         </property>
+         <property name="toolTip">
+          <string>The depth at which the object is drawn</string>
+         </property>
+        </widget>
+       </item>
+       <item row="1" column="1">
+        <widget class="QCheckBox" name="checkBoxPersistent">
+         <property name="toolTip">
+          <string>Wheter the object is persistent between rooms</string>
+         </property>
+         <property name="text">
+          <string>Persistent</string>
+         </property>
+        </widget>
+       </item>
+       <item row="2" column="0">
+        <widget class="QLabel" name="labelParent">
+         <property name="text">
+          <string>Parent:</string>
+         </property>
+         <property name="buddy">
+          <cstring>lineEditParent</cstring>
+         </property>
+        </widget>
+       </item>
+       <item row="2" column="1">
+        <layout class="QHBoxLayout" name="horizontalLayout_2">
+         <item>
+          <widget class="QLineEdit" name="lineEditParent">
+           <property name="sizePolicy">
+            <sizepolicy hsizetype="Ignored" vsizetype="Fixed">
+             <horstretch>0</horstretch>
+             <verstretch>0</verstretch>
+            </sizepolicy>
+           </property>
+           <property name="toolTip">
+            <string>The parent from which events and actions are</string>
+           </property>
+           <property name="text">
+            <string>&lt;no parent&gt;</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QToolButton" name="toolButtonParent">
+           <property name="text">
+            <string>...</string>
+           </property>
+          </widget>
+         </item>
+        </layout>
+       </item>
+       <item row="3" column="1">
+        <layout class="QHBoxLayout" name="horizontalLayout_3">
+         <item>
+          <widget class="QLineEdit" name="lineEditMask">
+           <property name="sizePolicy">
+            <sizepolicy hsizetype="Ignored" vsizetype="Fixed">
+             <horstretch>0</horstretch>
+             <verstretch>0</verstretch>
+            </sizepolicy>
+           </property>
+           <property name="toolTip">
+            <string>The image used as a collision mask for the object</string>
+           </property>
+           <property name="text">
+            <string>&lt;same as sprite&gt;</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QToolButton" name="toolButtonMask">
+           <property name="text">
+            <string>...</string>
+           </property>
+          </widget>
+         </item>
+        </layout>
+       </item>
+       <item row="3" column="0">
+        <widget class="QLabel" name="labelMask">
+         <property name="text">
+          <string>Mask:</string>
+         </property>
+         <property name="buddy">
+          <cstring>lineEditMask</cstring>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+     <item>
+      <spacer name="verticalSpacer_2">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <property name="sizeType">
+        <enum>QSizePolicy::Minimum</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>20</width>
+         <height>10</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item>
+      <widget class="QPushButton" name="pushButtonShowInformation">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Ignored" vsizetype="Fixed">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="toolTip">
+        <string>Show the information about the object</string>
+       </property>
+       <property name="text">
+        <string>Show Information</string>
+       </property>
+       <property name="icon">
+        <iconset resource="../resources.qrc">
+         <normaloff>:/qtgameengine/icons/info.png</normaloff>:/qtgameengine/icons/info.png</iconset>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <spacer name="verticalSpacer">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>20</width>
+         <height>40</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item>
+      <widget class="QDialogButtonBox" name="buttonBox">
+       <property name="standardButtons">
+        <set>QDialogButtonBox::Ok</set>
+       </property>
+       <property name="centerButtons">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout_2">
+     <item>
+      <widget class="QLabel" name="labelEvents">
+       <property name="text">
+        <string>Events:</string>
+       </property>
+       <property name="buddy">
+        <cstring>listViewEvents</cstring>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QListView" name="listViewEvents">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Ignored" vsizetype="Expanding">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="pushButtonAddEvent">
+       <property name="toolTip">
+        <string>Click here to add another event</string>
+       </property>
+       <property name="text">
+        <string>Add Event</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <layout class="QHBoxLayout" name="horizontalLayout_5">
+       <item>
+        <widget class="QPushButton" name="pushButtonDeleteEvent">
+         <property name="toolTip">
+          <string>Delete the currently selected event</string>
+         </property>
+         <property name="text">
+          <string>Delete</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="pushButtonChangeEvent">
+         <property name="toolTip">
+          <string>Change which event has this behaviour</string>
+         </property>
+         <property name="text">
+          <string>Change</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout_3">
+     <item>
+      <widget class="QLabel" name="labelActions">
+       <property name="text">
+        <string>Actions:</string>
+       </property>
+       <property name="buddy">
+        <cstring>listViewActions</cstring>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QListView" name="listViewActions">
+       <property name="toolTip">
+        <string>Drag actions here</string>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="QToolBox" name="toolBox">
+     <property name="currentIndex">
+      <number>0</number>
+     </property>
+     <widget class="QWidget" name="page">
+      <property name="geometry">
+       <rect>
+        <x>0</x>
+        <y>0</y>
+        <width>68</width>
+        <height>390</height>
+       </rect>
+      </property>
+      <attribute name="label">
+       <string>Page 1</string>
+      </attribute>
+     </widget>
+     <widget class="QWidget" name="page_2">
+      <property name="geometry">
+       <rect>
+        <x>0</x>
+        <y>0</y>
+        <width>68</width>
+        <height>390</height>
+       </rect>
+      </property>
+      <attribute name="label">
+       <string>Page 2</string>
+      </attribute>
+     </widget>
+    </widget>
+   </item>
+  </layout>
  </widget>
  <resources>
   <include location="../resources.qrc"/>
  </resources>
- <connections/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>ObjectPropertiesDialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>138</x>
+     <y>511</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>423</x>
+     <y>266</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>ObjectPropertiesDialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>138</x>
+     <y>511</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>423</x>
+     <y>266</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
 </ui>
diff --git a/dialogs/pathpropertiesdialog.cpp b/dialogs/pathpropertiesdialog.cpp
index dd1ed4d..db4e13f 100644
--- a/dialogs/pathpropertiesdialog.cpp
+++ b/dialogs/pathpropertiesdialog.cpp
@@ -108,11 +108,11 @@ PathPropertiesDialog::PathPropertiesDialog(Path &path, ProjectTreeModel &project
     connect(m_ui->checkBoxClosed, &QCheckBox::toggled,
             m_ui->widget, &PathPointsWidget::setClosed);
 
-    connect(m_ui->pushButtonAdd, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonAdd, &QAbstractButton::clicked,
             this, &PathPropertiesDialog::add);
-    connect(m_ui->pushButtonInsert, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonInsert, &QAbstractButton::clicked,
             this, &PathPropertiesDialog::insert);
-    connect(m_ui->pushButtonDelete, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonDelete, &QAbstractButton::clicked,
             this, &PathPropertiesDialog::delete_);
 
     connect(m_ui->lineEditName, &QLineEdit::textChanged,
diff --git a/dialogs/pathpropertiesdialog.ui b/dialogs/pathpropertiesdialog.ui
index 4c9fbd7..71da15e 100644
--- a/dialogs/pathpropertiesdialog.ui
+++ b/dialogs/pathpropertiesdialog.ui
@@ -191,6 +191,9 @@
              <property name="text">
               <string>X:</string>
              </property>
+             <property name="buddy">
+              <cstring>spinBoxX</cstring>
+             </property>
             </widget>
            </item>
            <item row="0" column="1">
@@ -208,6 +211,9 @@
              <property name="text">
               <string>Y:</string>
              </property>
+             <property name="buddy">
+              <cstring>spinBoxY</cstring>
+             </property>
             </widget>
            </item>
            <item row="1" column="1">
@@ -225,6 +231,9 @@
              <property name="text">
               <string>sp:</string>
              </property>
+             <property name="buddy">
+              <cstring>spinBoxSp</cstring>
+             </property>
             </widget>
            </item>
            <item row="2" column="1">
@@ -341,6 +350,9 @@
                <property name="text">
                 <string>Precision:</string>
                </property>
+               <property name="buddy">
+                <cstring>spinBoxPrecision</cstring>
+               </property>
               </widget>
              </item>
              <item row="0" column="1">
diff --git a/dialogs/preferencesdialog.cpp b/dialogs/preferencesdialog.cpp
index 3a1fbaa..3728ea0 100644
--- a/dialogs/preferencesdialog.cpp
+++ b/dialogs/preferencesdialog.cpp
@@ -10,7 +10,7 @@ PreferencesDialog::PreferencesDialog(QWidget *parent) :
     m_ui->setupUi(this);
 
 #ifdef Q_OS_LINUX
-    setWindowFlags(windowFlags() & ~Qt::Dialog | Qt::Window);
+    setWindowFlags((windowFlags() & ~Qt::Dialog) | Qt::Window);
 #endif
     setWindowFlag(Qt::WindowCloseButtonHint);
 
diff --git a/dialogs/scriptpropertiesdialog.cpp b/dialogs/scriptpropertiesdialog.cpp
index 46384b8..908bd84 100644
--- a/dialogs/scriptpropertiesdialog.cpp
+++ b/dialogs/scriptpropertiesdialog.cpp
@@ -10,36 +10,38 @@
 #include "projecttreemodel.h"
 
 ScriptPropertiesDialog::ScriptPropertiesDialog(Script &script, ProjectTreeModel &projectModel, QWidget *parent) :
-    CodeEditorDialog{parent},
+    CodeEditorDialog{tr("Script Properties: %0").arg(script.name), parent},
     m_script{script},
     m_projectModel{projectModel},
     m_lineEditName{new QLineEdit{this}}
 {
-    updateTitle();
-
     {
         auto label = new QLabel{tr("Name:"), this};
         label->setBuddy(m_lineEditName);
-        m_ui->toolBar->addWidget(label);
+        addToolbarWidget(label);
     }
     m_lineEditName->setMaximumWidth(100);
-    m_ui->toolBar->addWidget(m_lineEditName);
+    addToolbarWidget(m_lineEditName);
 
 
     m_lineEditName->setText(m_script.name);
-    m_ui->codeEdit->setPlainText(m_script.script);
+    setScript(m_script.script);
 
     connect(&m_projectModel, &ProjectTreeModel::scriptNameChanged,
             this, &ScriptPropertiesDialog::scriptNameChanged);
 
     connect(m_lineEditName, &QLineEdit::textChanged,
             this, &ScriptPropertiesDialog::changed);
-    connect(m_ui->codeEdit, &QPlainTextEdit::textChanged,
-            this, &ScriptPropertiesDialog::changed);
 }
 
 void ScriptPropertiesDialog::accept()
 {
+    if (!m_unsavedChanges)
+    {
+        QDialog::reject();
+        return;
+    }
+
     if (m_script.name != m_lineEditName->text())
     {
         if (!m_projectModel.rename<Script>(m_script, m_lineEditName->text()))
@@ -49,68 +51,20 @@ void ScriptPropertiesDialog::accept()
         }
     }
 
-    m_script.script = m_ui->codeEdit->toPlainText();
+    m_script.script = script();
 
     CodeEditorDialog::accept();
 }
 
-void ScriptPropertiesDialog::reject()
-{
-    if (!m_unsavedChanges)
-    {
-        CodeEditorDialog::reject();
-        return;
-    }
-
-    const auto result = QMessageBox::warning(
-        this,
-        tr("The Script has been modified."),
-        tr("Do you want to save your changes?"),
-        QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel,
-        QMessageBox::Save
-    );
-    switch (result)
-    {
-    case QMessageBox::Save:
-        accept();
-        return;
-    case QMessageBox::Discard:
-        CodeEditorDialog::reject();
-        return;
-    case QMessageBox::Cancel:
-        return;
-    default:
-        qWarning() << "unexpected dialog result" << result;
-    }
-}
-
-void ScriptPropertiesDialog::changed()
-{
-    if (!m_unsavedChanges)
-    {
-        m_unsavedChanges = true;
-        updateTitle();
-    }
-}
-
 void ScriptPropertiesDialog::scriptNameChanged(const Script &script)
 {
     if (&script != &m_script)
         return;
 
+    setTitle(tr("Script Properties: %0").arg(script.name));
+
     {
         QSignalBlocker blocker{m_lineEditName};
         m_lineEditName->setText(script.name);
     }
-
-    updateTitle();
 }
-
-void ScriptPropertiesDialog::updateTitle()
-{
-    setWindowTitle(tr("Script Properties: %0%1")
-                       .arg(m_script.name)
-                       .arg(m_unsavedChanges ? tr("*") : QString{})
-                   );
-}
-
diff --git a/dialogs/scriptpropertiesdialog.h b/dialogs/scriptpropertiesdialog.h
index ebc389f..4b0ac39 100644
--- a/dialogs/scriptpropertiesdialog.h
+++ b/dialogs/scriptpropertiesdialog.h
@@ -12,20 +12,13 @@ public:
     ScriptPropertiesDialog(Script &script, ProjectTreeModel &projectModel, QWidget *parent = nullptr);
 
     void accept() override;
-    void reject() override;
 
 private slots:
-    void changed();
-
     void scriptNameChanged(const Script &script);
 
 private:
-    void updateTitle();
-
     Script &m_script;
     ProjectTreeModel &m_projectModel;
 
-    bool m_unsavedChanges{};
-
     QLineEdit * const m_lineEditName;
 };
diff --git a/dialogs/soundpropertiesdialog.cpp b/dialogs/soundpropertiesdialog.cpp
index 49ce290..4bf71a7 100644
--- a/dialogs/soundpropertiesdialog.cpp
+++ b/dialogs/soundpropertiesdialog.cpp
@@ -48,15 +48,15 @@ SoundPropertiesDialog::SoundPropertiesDialog(Sound &sound, ProjectTreeModel &pro
     connect(&m_projectModel, &ProjectTreeModel::soundNameChanged,
             this, &SoundPropertiesDialog::soundNameChanged);
 
-    connect(m_ui->pushButtonLoad, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonLoad, &QAbstractButton::clicked,
             this, &SoundPropertiesDialog::loadSound);
-    connect(m_ui->pushButtonPlay, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonPlay, &QAbstractButton::clicked,
             this, &SoundPropertiesDialog::playSound);
-    connect(m_ui->pushButtonStop, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonStop, &QAbstractButton::clicked,
             this, &SoundPropertiesDialog::stopSound);
-    connect(m_ui->pushButtonSave, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonSave, &QAbstractButton::clicked,
             this, &SoundPropertiesDialog::saveSound);
-    connect(m_ui->pushButtonEdit, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonEdit, &QAbstractButton::clicked,
             this, &SoundPropertiesDialog::editSound);
 
     connect(m_ui->lineEditName, &QLineEdit::textChanged,
diff --git a/dialogs/soundpropertiesdialog.h b/dialogs/soundpropertiesdialog.h
index 2ee0957..7e568a5 100644
--- a/dialogs/soundpropertiesdialog.h
+++ b/dialogs/soundpropertiesdialog.h
@@ -5,7 +5,6 @@
 #include <QSoundEffect>
 
 #include <memory>
-#include <optional>
 
 namespace Ui { class SoundPropertiesDialog; }
 struct Sound;
diff --git a/dialogs/spritepropertiesdialog.cpp b/dialogs/spritepropertiesdialog.cpp
index c1e3c62..0229a71 100644
--- a/dialogs/spritepropertiesdialog.cpp
+++ b/dialogs/spritepropertiesdialog.cpp
@@ -37,15 +37,15 @@ SpritePropertiesDialog::SpritePropertiesDialog(Sprite &sprite, ProjectTreeModel
     connect(&m_projectModel, &ProjectTreeModel::spriteNameChanged,
             this, &SpritePropertiesDialog::spriteNameChanged);
 
-    connect(m_ui->pushButtonLoad, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonLoad, &QAbstractButton::clicked,
             this, &SpritePropertiesDialog::loadSprite);
-    connect(m_ui->pushButtonSave, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonSave, &QAbstractButton::clicked,
             this, &SpritePropertiesDialog::saveSprite);
-    connect(m_ui->pushButtonEdit, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonEdit, &QAbstractButton::clicked,
             this, &SpritePropertiesDialog::editSprite);
-    connect(m_ui->pushButtonCenterOrigin, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonCenterOrigin, &QAbstractButton::clicked,
             this, &SpritePropertiesDialog::centerOrigin);
-    connect(m_ui->pushButtonModifyCollisionmask, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonModifyCollisionmask, &QAbstractButton::clicked,
             this, &SpritePropertiesDialog::modifyMask);
 
     connect(m_ui->lineEditName, &QLineEdit::textChanged,
diff --git a/dialogs/spritepropertiesdialog.h b/dialogs/spritepropertiesdialog.h
index 36b88c3..fc7b2f8 100644
--- a/dialogs/spritepropertiesdialog.h
+++ b/dialogs/spritepropertiesdialog.h
@@ -4,7 +4,6 @@
 #include <QString>
 
 #include <memory>
-#include <optional>
 
 namespace Ui { class SpritePropertiesDialog; }
 struct Sprite;
diff --git a/dialogs/timelinepropertiesdialog.cpp b/dialogs/timelinepropertiesdialog.cpp
index 1d93c44..ef75f7d 100644
--- a/dialogs/timelinepropertiesdialog.cpp
+++ b/dialogs/timelinepropertiesdialog.cpp
@@ -1,11 +1,188 @@
 #include "timelinepropertiesdialog.h"
 #include "ui_timelinepropertiesdialog.h"
 
+#include <QDebug>
+#include <QMessageBox>
+
+#include "projectcontainer.h"
+#include "projecttreemodel.h"
+#include "timelinemomentsmodel.h"
+#include "timelineactionsmodel.h"
+
 TimeLinePropertiesDialog::TimeLinePropertiesDialog(TimeLine &timeLine, ProjectTreeModel &projectModel, QWidget *parent) :
     QDialog{parent},
-    m_ui{std::make_unique<Ui::TimeLinePropertiesDialog>()}
+    m_ui{std::make_unique<Ui::TimeLinePropertiesDialog>()},
+    m_timeLine{timeLine},
+    m_projectModel{projectModel},
+    m_momentsModel{std::make_unique<TimelineMomentsModel>(this)},
+    m_actionsModel{std::make_unique<TimelineActionsModel>(this)}
 {
     m_ui->setupUi(this);
+
+    updateTitle();
+
+    if (auto button = m_ui->buttonBox->button(QDialogButtonBox::Ok))
+        button->setIcon(QIcon{":/qtgameengine/icons/ok.png"});
+    if (auto button = m_ui->buttonBox->button(QDialogButtonBox::Cancel))
+        button->setIcon(QIcon{":/qtgameengine/icons/delete.png"});
+
+    m_ui->lineEditName->setText(m_timeLine.name);
+
+    m_ui->listViewMoments->setModel(m_momentsModel.get());
+
+    m_ui->listViewActions->setModel(m_actionsModel.get());
+
+    connect(&m_projectModel, &ProjectTreeModel::timeLineNameChanged,
+            this, &TimeLinePropertiesDialog::timeLineNameChanged);
+
+    connect(m_ui->lineEditName, &QLineEdit::textChanged,
+            this, &TimeLinePropertiesDialog::changed);
+
+    connect(m_ui->pushButtonAdd, &QAbstractButton::clicked,
+            this, &TimeLinePropertiesDialog::add);
+    connect(m_ui->pushButtonChange, &QAbstractButton::clicked,
+            this, &TimeLinePropertiesDialog::change);
+    connect(m_ui->pushButtonDelete, &QAbstractButton::clicked,
+            this, &TimeLinePropertiesDialog::delete_);
+    connect(m_ui->pushButtonClear, &QAbstractButton::clicked,
+            this, &TimeLinePropertiesDialog::clear);
+    connect(m_ui->pushButtonShift, &QAbstractButton::clicked,
+            this, &TimeLinePropertiesDialog::shift);
+    connect(m_ui->pushButtonDuplicate, &QAbstractButton::clicked,
+            this, &TimeLinePropertiesDialog::duplicate);
+    connect(m_ui->pushButtonSpread, &QAbstractButton::clicked,
+            this, &TimeLinePropertiesDialog::spread);
+    connect(m_ui->pushButtonMerge, &QAbstractButton::clicked,
+            this, &TimeLinePropertiesDialog::merge);
+    connect(m_ui->pushButtonShowInformation, &QAbstractButton::clicked,
+            this, &TimeLinePropertiesDialog::showInformation);
 }
 
 TimeLinePropertiesDialog::~TimeLinePropertiesDialog() = default;
+
+void TimeLinePropertiesDialog::accept()
+{
+    if (!m_unsavedChanges)
+    {
+        QDialog::reject();
+        return;
+    }
+
+    if (m_timeLine.name != m_ui->lineEditName->text())
+    {
+        if (!m_projectModel.rename<TimeLine>(m_timeLine, m_ui->lineEditName->text()))
+        {
+            QMessageBox::critical(this, tr("Renaming Time Line failed!"), tr("Renaming Time Line failed!"));
+            return;
+        }
+    }
+
+    // TODO
+
+    QDialog::accept();
+}
+
+void TimeLinePropertiesDialog::reject()
+{
+    if (!m_unsavedChanges)
+    {
+        QDialog::reject();
+        return;
+    }
+
+    const auto result = QMessageBox::warning(
+        this,
+        tr("The Time Line has been modified."),
+        tr("Do you want to save your changes?"),
+        QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel,
+        QMessageBox::Save
+    );
+    switch (result)
+    {
+    case QMessageBox::Save:
+        accept();
+        return;
+    case QMessageBox::Discard:
+        QDialog::reject();
+        return;
+    case QMessageBox::Cancel:
+        return;
+    default:
+        qWarning() << "unexpected dialog result" << result;
+    }
+}
+
+void TimeLinePropertiesDialog::changed()
+{
+    if (!m_unsavedChanges)
+    {
+        m_unsavedChanges = true;
+        updateTitle();
+    }
+}
+
+void TimeLinePropertiesDialog::timeLineNameChanged(const TimeLine &timeLine)
+{
+    if (&timeLine != &m_timeLine)
+        return;
+
+    {
+        QSignalBlocker blocker{m_ui->lineEditName};
+        m_ui->lineEditName->setText(timeLine.name);
+    }
+
+    updateTitle();
+}
+
+void TimeLinePropertiesDialog::add()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void TimeLinePropertiesDialog::change()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void TimeLinePropertiesDialog::delete_()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void TimeLinePropertiesDialog::clear()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void TimeLinePropertiesDialog::shift()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void TimeLinePropertiesDialog::duplicate()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void TimeLinePropertiesDialog::spread()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void TimeLinePropertiesDialog::merge()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void TimeLinePropertiesDialog::showInformation()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void TimeLinePropertiesDialog::updateTitle()
+{
+    setWindowTitle(tr("Time Line Properties: %0%1")
+                       .arg(m_timeLine.name)
+                       .arg(m_unsavedChanges ? tr("*") : QString{})
+                   );
+}
diff --git a/dialogs/timelinepropertiesdialog.h b/dialogs/timelinepropertiesdialog.h
index 743ffb4..1d70133 100644
--- a/dialogs/timelinepropertiesdialog.h
+++ b/dialogs/timelinepropertiesdialog.h
@@ -7,6 +7,8 @@
 namespace Ui { class TimeLinePropertiesDialog; }
 struct TimeLine;
 class ProjectTreeModel;
+class TimelineMomentsModel;
+class TimelineActionsModel;
 
 class TimeLinePropertiesDialog : public QDialog
 {
@@ -16,6 +18,34 @@ public:
     explicit TimeLinePropertiesDialog(TimeLine &timeLine, ProjectTreeModel &projectModel, QWidget *parent = nullptr);
     ~TimeLinePropertiesDialog();
 
+    void accept() override;
+    void reject() override;
+
+private slots:
+    void changed();
+
+    void timeLineNameChanged(const TimeLine &timeLine);
+
+    void add();
+    void change();
+    void delete_();
+    void clear();
+    void shift();
+    void duplicate();
+    void spread();
+    void merge();
+    void showInformation();
+
 private:
+    void updateTitle();
+
     const std::unique_ptr<Ui::TimeLinePropertiesDialog> m_ui;
+
+    TimeLine &m_timeLine;
+    ProjectTreeModel &m_projectModel;
+
+    const std::unique_ptr<TimelineMomentsModel> m_momentsModel;
+    const std::unique_ptr<TimelineActionsModel> m_actionsModel;
+
+    bool m_unsavedChanges{};
 };
diff --git a/dialogs/timelinepropertiesdialog.ui b/dialogs/timelinepropertiesdialog.ui
index 8fcedd1..c601bd9 100644
--- a/dialogs/timelinepropertiesdialog.ui
+++ b/dialogs/timelinepropertiesdialog.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>400</width>
-    <height>300</height>
+    <width>838</width>
+    <height>533</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -17,9 +17,341 @@
    <iconset resource="../resources.qrc">
     <normaloff>:/qtgameengine/icons/timeline-file.png</normaloff>:/qtgameengine/icons/timeline-file.png</iconset>
   </property>
+  <layout class="QHBoxLayout" name="horizontalLayout" stretch="0,0,1,0">
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout">
+     <item>
+      <widget class="QLabel" name="labelName">
+       <property name="text">
+        <string>Name:</string>
+       </property>
+       <property name="buddy">
+        <cstring>lineEditName</cstring>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QLineEdit" name="lineEditName">
+       <property name="toolTip">
+        <string>The name of the time line</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <spacer name="verticalSpacer">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>20</width>
+         <height>40</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item>
+      <layout class="QGridLayout" name="gridLayout">
+       <item row="0" column="0">
+        <widget class="QPushButton" name="pushButtonAdd">
+         <property name="toolTip">
+          <string>Click here to add another moment</string>
+         </property>
+         <property name="text">
+          <string>&amp;Add</string>
+         </property>
+         <property name="icon">
+          <iconset resource="../resources.qrc">
+           <normaloff>:/qtgameengine/icons/add.png</normaloff>:/qtgameengine/icons/add.png</iconset>
+         </property>
+        </widget>
+       </item>
+       <item row="0" column="1">
+        <widget class="QPushButton" name="pushButtonChange">
+         <property name="toolTip">
+          <string>Change the moment</string>
+         </property>
+         <property name="text">
+          <string>&amp;Change</string>
+         </property>
+         <property name="icon">
+          <iconset resource="../resources.qrc">
+           <normaloff>:/qtgameengine/icons/replace.png</normaloff>:/qtgameengine/icons/replace.png</iconset>
+         </property>
+        </widget>
+       </item>
+       <item row="1" column="0">
+        <widget class="QPushButton" name="pushButtonDelete">
+         <property name="toolTip">
+          <string>Delete moments</string>
+         </property>
+         <property name="text">
+          <string>&amp;Delete</string>
+         </property>
+         <property name="icon">
+          <iconset resource="../resources.qrc">
+           <normaloff>:/qtgameengine/icons/delete.png</normaloff>:/qtgameengine/icons/delete.png</iconset>
+         </property>
+        </widget>
+       </item>
+       <item row="3" column="0">
+        <widget class="QPushButton" name="pushButtonShift">
+         <property name="toolTip">
+          <string>Shift moments by an amount</string>
+         </property>
+         <property name="text">
+          <string>&amp;Shift</string>
+         </property>
+         <property name="icon">
+          <iconset resource="../resources.qrc">
+           <normaloff>:/qtgameengine/icons/arrow-right.png</normaloff>:/qtgameengine/icons/arrow-right.png</iconset>
+         </property>
+        </widget>
+       </item>
+       <item row="1" column="1">
+        <widget class="QPushButton" name="pushButtonClear">
+         <property name="toolTip">
+          <string>Clear all moments</string>
+         </property>
+         <property name="text">
+          <string>C&amp;lear</string>
+         </property>
+         <property name="icon">
+          <iconset resource="../resources.qrc">
+           <normaloff>:/qtgameengine/icons/new.png</normaloff>:/qtgameengine/icons/new.png</iconset>
+         </property>
+        </widget>
+       </item>
+       <item row="3" column="1">
+        <widget class="QPushButton" name="pushButtonDuplicate">
+         <property name="toolTip">
+          <string>Duplicate moments</string>
+         </property>
+         <property name="text">
+          <string>D&amp;uplicate</string>
+         </property>
+         <property name="icon">
+          <iconset resource="../resources.qrc">
+           <normaloff>:/qtgameengine/icons/copy.png</normaloff>:/qtgameengine/icons/copy.png</iconset>
+         </property>
+        </widget>
+       </item>
+       <item row="2" column="0">
+        <spacer name="verticalSpacer_2">
+         <property name="orientation">
+          <enum>Qt::Vertical</enum>
+         </property>
+         <property name="sizeHint" stdset="0">
+          <size>
+           <width>20</width>
+           <height>40</height>
+          </size>
+         </property>
+        </spacer>
+       </item>
+       <item row="4" column="0">
+        <widget class="QPushButton" name="pushButtonSpread">
+         <property name="toolTip">
+          <string>Spread out the moments adding additional time between them</string>
+         </property>
+         <property name="text">
+          <string>S&amp;pread</string>
+         </property>
+         <property name="icon">
+          <iconset resource="../resources.qrc">
+           <normaloff>:/qtgameengine/icons/scale.png</normaloff>:/qtgameengine/icons/scale.png</iconset>
+         </property>
+        </widget>
+       </item>
+       <item row="4" column="1">
+        <widget class="QPushButton" name="pushButtonMerge">
+         <property name="toolTip">
+          <string>Merge a number of moments into one</string>
+         </property>
+         <property name="text">
+          <string>&amp;Merge</string>
+         </property>
+         <property name="icon">
+          <iconset resource="../resources.qrc">
+           <normaloff>:/qtgameengine/icons/merge.png</normaloff>:/qtgameengine/icons/merge.png</iconset>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+     <item>
+      <spacer name="verticalSpacer_3">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>20</width>
+         <height>40</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item>
+      <widget class="QPushButton" name="pushButtonShowInformation">
+       <property name="toolTip">
+        <string>Show information about the time line</string>
+       </property>
+       <property name="text">
+        <string>Show &amp;Information</string>
+       </property>
+       <property name="icon">
+        <iconset resource="../resources.qrc">
+         <normaloff>:/qtgameengine/icons/info.png</normaloff>:/qtgameengine/icons/info.png</iconset>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <spacer name="verticalSpacer_4">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>20</width>
+         <height>40</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item>
+      <widget class="QDialogButtonBox" name="buttonBox">
+       <property name="standardButtons">
+        <set>QDialogButtonBox::Ok</set>
+       </property>
+       <property name="centerButtons">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout_2">
+     <item>
+      <widget class="QLabel" name="labelMoments">
+       <property name="text">
+        <string>Moments:</string>
+       </property>
+       <property name="buddy">
+        <cstring>listViewMoments</cstring>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QListView" name="listViewMoments">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Ignored" vsizetype="Expanding">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="minimumSize">
+        <size>
+         <width>150</width>
+         <height>0</height>
+        </size>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout_3">
+     <item>
+      <widget class="QLabel" name="labelActions">
+       <property name="text">
+        <string>Actions:</string>
+       </property>
+       <property name="buddy">
+        <cstring>listViewActions</cstring>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QListView" name="listViewActions">
+       <property name="toolTip">
+        <string>Drag actions here</string>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="QToolBox" name="toolBox">
+     <property name="currentIndex">
+      <number>0</number>
+     </property>
+     <widget class="QWidget" name="page">
+      <property name="geometry">
+       <rect>
+        <x>0</x>
+        <y>0</y>
+        <width>68</width>
+        <height>457</height>
+       </rect>
+      </property>
+      <attribute name="label">
+       <string>Page 1</string>
+      </attribute>
+     </widget>
+     <widget class="QWidget" name="page_2">
+      <property name="geometry">
+       <rect>
+        <x>0</x>
+        <y>0</y>
+        <width>68</width>
+        <height>457</height>
+       </rect>
+      </property>
+      <attribute name="label">
+       <string>Page 2</string>
+      </attribute>
+     </widget>
+    </widget>
+   </item>
+  </layout>
  </widget>
  <resources>
   <include location="../resources.qrc"/>
  </resources>
- <connections/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>TimeLinePropertiesDialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>150</x>
+     <y>277</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>256</x>
+     <y>239</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>TimeLinePropertiesDialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>150</x>
+     <y>277</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>256</x>
+     <y>239</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
 </ui>
diff --git a/dialogs/triggerconditiondialog.cpp b/dialogs/triggerconditiondialog.cpp
index e3e75c5..bff7cac 100644
--- a/dialogs/triggerconditiondialog.cpp
+++ b/dialogs/triggerconditiondialog.cpp
@@ -1,10 +1,10 @@
 #include "triggerconditiondialog.h"
 
 TriggerConditionDialog::TriggerConditionDialog(QWidget *parent) :
-    CodeEditorDialog{parent}
+    CodeEditorDialog{tr("Trigger condition"), parent}
 {
 #ifdef Q_OS_LINUX
-    setWindowFlags(windowFlags() & ~Qt::Dialog | Qt::Window);
+    setWindowFlags((windowFlags() & ~Qt::Dialog) | Qt::Window);
 #endif
     setWindowFlag(Qt::WindowMinimizeButtonHint);
     setWindowFlag(Qt::WindowMaximizeButtonHint);
diff --git a/dialogs/triggersdialog.cpp b/dialogs/triggersdialog.cpp
index a98ff6e..7850597 100644
--- a/dialogs/triggersdialog.cpp
+++ b/dialogs/triggersdialog.cpp
@@ -1,6 +1,9 @@
 #include "triggersdialog.h"
 #include "ui_triggersdialog.h"
 
+#include <QDebug>
+#include <QMessageBox>
+
 #include "projectcontainer.h"
 #include "triggersmodel.h"
 #include "triggerconditiondialog.h"
@@ -20,14 +23,50 @@ TriggersDialog::TriggersDialog(ProjectContainer &project, QWidget *parent) :
 
     m_ui->listView->setModel(m_model.get());
 
-    connect(m_ui->pushButtonUseCodeEditor, &QAbstractButton::pressed,
+    connect(m_ui->pushButtonAdd, &QAbstractButton::clicked,
+            this, &TriggersDialog::add);
+    connect(m_ui->pushButtonDelete, &QAbstractButton::clicked,
+            this, &TriggersDialog::delete_);
+    connect(m_ui->pushButtonLoad, &QAbstractButton::clicked,
+            this, &TriggersDialog::load);
+    connect(m_ui->pushButtonSave, &QAbstractButton::clicked,
+            this, &TriggersDialog::save);
+    connect(m_ui->pushButtonClear, &QAbstractButton::clicked,
+            this, &TriggersDialog::clear);
+    connect(m_ui->pushButtonUseCodeEditor, &QAbstractButton::clicked,
             this, &TriggersDialog::openCodeEditor);
 }
 
+void TriggersDialog::add()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void TriggersDialog::delete_()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void TriggersDialog::load()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void TriggersDialog::save()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void TriggersDialog::clear()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
 TriggersDialog::~TriggersDialog() = default;
 
 void TriggersDialog::openCodeEditor()
 {
     TriggerConditionDialog dialog{this};
-    dialog.exec();
+    if (dialog.exec() == QDialog::Accepted)
+        m_ui->plainTextEdit->setPlainText(dialog.script());
 }
diff --git a/dialogs/triggersdialog.h b/dialogs/triggersdialog.h
index 9cd6017..69808f7 100644
--- a/dialogs/triggersdialog.h
+++ b/dialogs/triggersdialog.h
@@ -17,6 +17,12 @@ public:
     ~TriggersDialog();
 
 private slots:
+    void add();
+    void delete_();
+    void load();
+    void save();
+    void clear();
+
     void openCodeEditor();
 
 private:
diff --git a/dialogs/triggersdialog.ui b/dialogs/triggersdialog.ui
index 9e412b5..57f1f8a 100644
--- a/dialogs/triggersdialog.ui
+++ b/dialogs/triggersdialog.ui
@@ -24,6 +24,9 @@
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
+       <property name="toolTip">
+        <string>List of all defined triggers. Click on a trigger to change it</string>
+       </property>
       </widget>
      </item>
      <item>
@@ -36,6 +39,10 @@
          <property name="text">
           <string>&amp;Load</string>
          </property>
+         <property name="icon">
+          <iconset resource="../resources.qrc">
+           <normaloff>:/qtgameengine/icons/open.png</normaloff>:/qtgameengine/icons/open.png</iconset>
+         </property>
         </widget>
        </item>
        <item row="0" column="1">
@@ -46,6 +53,10 @@
          <property name="text">
           <string>&amp;Delete</string>
          </property>
+         <property name="icon">
+          <iconset resource="../resources.qrc">
+           <normaloff>:/qtgameengine/icons/delete.png</normaloff>:/qtgameengine/icons/delete.png</iconset>
+         </property>
         </widget>
        </item>
        <item row="0" column="0">
@@ -56,6 +67,10 @@
          <property name="text">
           <string>&amp;Add</string>
          </property>
+         <property name="icon">
+          <iconset resource="../resources.qrc">
+           <normaloff>:/qtgameengine/icons/add.png</normaloff>:/qtgameengine/icons/add.png</iconset>
+         </property>
         </widget>
        </item>
        <item row="2" column="0">
@@ -66,6 +81,10 @@
          <property name="text">
           <string>&amp;Clear</string>
          </property>
+         <property name="icon">
+          <iconset resource="../resources.qrc">
+           <normaloff>:/qtgameengine/icons/new.png</normaloff>:/qtgameengine/icons/new.png</iconset>
+         </property>
         </widget>
        </item>
        <item row="1" column="1">
@@ -76,6 +95,10 @@
          <property name="text">
           <string>&amp;Save</string>
          </property>
+         <property name="icon">
+          <iconset resource="../resources.qrc">
+           <normaloff>:/qtgameengine/icons/save.png</normaloff>:/qtgameengine/icons/save.png</iconset>
+         </property>
         </widget>
        </item>
       </layout>
@@ -103,20 +126,34 @@
         <property name="text">
          <string>Name:</string>
         </property>
+        <property name="buddy">
+         <cstring>lineEditName</cstring>
+        </property>
        </widget>
       </item>
       <item>
-       <widget class="QLineEdit" name="lineEditName"/>
+       <widget class="QLineEdit" name="lineEditName">
+        <property name="toolTip">
+         <string>Type here a name for the trigger</string>
+        </property>
+       </widget>
       </item>
       <item>
        <widget class="QLabel" name="labelCondition">
         <property name="text">
          <string>Condition:</string>
         </property>
+        <property name="buddy">
+         <cstring>plainTextEdit</cstring>
+        </property>
        </widget>
       </item>
       <item>
-       <widget class="QPlainTextEdit" name="plainTextEdit"/>
+       <widget class="QPlainTextEdit" name="plainTextEdit">
+        <property name="toolTip">
+         <string>Type here the condition for the trigger</string>
+        </property>
+       </widget>
       </item>
       <item>
        <layout class="QHBoxLayout" name="horizontalLayout_2">
@@ -135,6 +172,9 @@
         </item>
         <item>
          <widget class="QPushButton" name="pushButtonUseCodeEditor">
+          <property name="toolTip">
+           <string>Use the code editor to edit the condition</string>
+          </property>
           <property name="text">
            <string>&amp;Use code editor</string>
           </property>
@@ -153,6 +193,9 @@
        <layout class="QHBoxLayout" name="horizontalLayout_3">
         <item>
          <widget class="QRadioButton" name="radioButtonBegin">
+          <property name="toolTip">
+           <string>Event will be checked at the beginning of each step</string>
+          </property>
           <property name="text">
            <string>Begin of step</string>
           </property>
@@ -160,6 +203,9 @@
         </item>
         <item>
          <widget class="QRadioButton" name="radioButtonMiddle">
+          <property name="toolTip">
+           <string>Event will be checked in the middle of each step (just before the step event)</string>
+          </property>
           <property name="text">
            <string>Middle of step</string>
           </property>
@@ -167,6 +213,9 @@
         </item>
         <item>
          <widget class="QRadioButton" name="radioButtonEnd">
+          <property name="toolTip">
+           <string>Event will be checked at the end of each step</string>
+          </property>
           <property name="text">
            <string>End of step</string>
           </property>
@@ -179,17 +228,26 @@
         <property name="text">
          <string>Constant name:</string>
         </property>
+        <property name="buddy">
+         <cstring>lineEditConstantName</cstring>
+        </property>
        </widget>
       </item>
       <item>
-       <widget class="QLineEdit" name="lineEditConstantName"/>
+       <widget class="QLineEdit" name="lineEditConstantName">
+        <property name="toolTip">
+         <string>When required you can provide a constant name that you can use in code to call the event</string>
+        </property>
+       </widget>
       </item>
      </layout>
     </widget>
    </item>
   </layout>
  </widget>
- <resources/>
+ <resources>
+  <include location="../resources.qrc"/>
+ </resources>
  <connections>
   <connection>
    <sender>buttonBox</sender>
diff --git a/dialogs/userdefinedconstantsdialog.cpp b/dialogs/userdefinedconstantsdialog.cpp
index ad9f8ee..4810fc4 100644
--- a/dialogs/userdefinedconstantsdialog.cpp
+++ b/dialogs/userdefinedconstantsdialog.cpp
@@ -1,6 +1,9 @@
 #include "userdefinedconstantsdialog.h"
 #include "ui_userdefinedconstantsdialog.h"
 
+#include <QDebug>
+#include <QMessageBox>
+
 #include "projectcontainer.h"
 #include "constantsmodel.h"
 
@@ -18,6 +21,70 @@ UserDefinedConstantsDialog::UserDefinedConstantsDialog(ProjectContainer &project
         button->setIcon(QIcon{":/qtgameengine/icons/delete.png"});
 
     m_ui->treeView->setModel(m_model.get());
+
+    connect(m_ui->pushButtonInsert, &QAbstractButton::clicked,
+            this, &UserDefinedConstantsDialog::insert);
+    connect(m_ui->pushButtonAdd, &QAbstractButton::clicked,
+            this, &UserDefinedConstantsDialog::add);
+    connect(m_ui->pushButtonDelete, &QAbstractButton::clicked,
+            this, &UserDefinedConstantsDialog::delete_);
+    connect(m_ui->pushButtonClear, &QAbstractButton::clicked,
+            this, &UserDefinedConstantsDialog::clear);
+    connect(m_ui->pushButtonUp, &QAbstractButton::clicked,
+            this, &UserDefinedConstantsDialog::up);
+    connect(m_ui->pushButtonDown, &QAbstractButton::clicked,
+            this, &UserDefinedConstantsDialog::down);
+    connect(m_ui->pushButtonSort, &QAbstractButton::clicked,
+            this, &UserDefinedConstantsDialog::sort);
+    connect(m_ui->pushButtonLoad, &QAbstractButton::clicked,
+            this, &UserDefinedConstantsDialog::load);
+    connect(m_ui->pushButtonSave, &QAbstractButton::clicked,
+            this, &UserDefinedConstantsDialog::save);
 }
 
 UserDefinedConstantsDialog::~UserDefinedConstantsDialog() = default;
+
+void UserDefinedConstantsDialog::insert()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void UserDefinedConstantsDialog::add()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void UserDefinedConstantsDialog::delete_()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void UserDefinedConstantsDialog::clear()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void UserDefinedConstantsDialog::up()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void UserDefinedConstantsDialog::down()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void UserDefinedConstantsDialog::sort()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void UserDefinedConstantsDialog::load()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
+
+void UserDefinedConstantsDialog::save()
+{
+    QMessageBox::warning(this, tr("Not yet implemented"), tr("Not yet implemented"));
+}
diff --git a/dialogs/userdefinedconstantsdialog.h b/dialogs/userdefinedconstantsdialog.h
index 9f29f02..18fc4eb 100644
--- a/dialogs/userdefinedconstantsdialog.h
+++ b/dialogs/userdefinedconstantsdialog.h
@@ -16,6 +16,17 @@ public:
     explicit UserDefinedConstantsDialog(ProjectContainer &project, QWidget *parent = nullptr);
     ~UserDefinedConstantsDialog();
 
+private slots:
+    void insert();
+    void add();
+    void delete_();
+    void clear();
+    void up();
+    void down();
+    void sort();
+    void load();
+    void save();
+
 private:
     const std::unique_ptr<Ui::UserDefinedConstantsDialog> m_ui;
 
diff --git a/dialogs/userdefinedconstantsdialog.ui b/dialogs/userdefinedconstantsdialog.ui
index aa748d1..5d746d1 100644
--- a/dialogs/userdefinedconstantsdialog.ui
+++ b/dialogs/userdefinedconstantsdialog.ui
@@ -32,65 +32,128 @@
        <layout class="QGridLayout" name="gridLayout">
         <item row="0" column="0">
          <widget class="QPushButton" name="pushButtonInsert">
+          <property name="toolTip">
+           <string>Insert a constant before the current one</string>
+          </property>
           <property name="text">
            <string>&amp;Insert</string>
           </property>
+          <property name="icon">
+           <iconset resource="../resources.qrc">
+            <normaloff>:/qtgameengine/icons/add.png</normaloff>:/qtgameengine/icons/add.png</iconset>
+          </property>
          </widget>
         </item>
         <item row="0" column="3">
          <widget class="QPushButton" name="pushButtonSort">
+          <property name="toolTip">
+           <string>Sort the constants</string>
+          </property>
           <property name="text">
            <string>&amp;Sort</string>
           </property>
+          <property name="icon">
+           <iconset resource="../resources.qrc">
+            <normaloff>:/qtgameengine/icons/sort.png</normaloff>:/qtgameengine/icons/sort.png</iconset>
+          </property>
          </widget>
         </item>
         <item row="0" column="1">
          <widget class="QPushButton" name="pushButtonDelete">
+          <property name="toolTip">
+           <string>Delete the current constant</string>
+          </property>
           <property name="text">
            <string>&amp;Delete</string>
           </property>
+          <property name="icon">
+           <iconset resource="../resources.qrc">
+            <normaloff>:/qtgameengine/icons/delete.png</normaloff>:/qtgameengine/icons/delete.png</iconset>
+          </property>
          </widget>
         </item>
         <item row="0" column="4">
          <widget class="QPushButton" name="pushButtonLoad">
+          <property name="toolTip">
+           <string>Load the constants from a text file</string>
+          </property>
           <property name="text">
            <string>&amp;Load</string>
           </property>
+          <property name="icon">
+           <iconset resource="../resources.qrc">
+            <normaloff>:/qtgameengine/icons/open.png</normaloff>:/qtgameengine/icons/open.png</iconset>
+          </property>
          </widget>
         </item>
         <item row="0" column="2">
          <widget class="QPushButton" name="pushButtonUp">
+          <property name="toolTip">
+           <string>Moves the constant up</string>
+          </property>
           <property name="text">
            <string>&amp;Up</string>
           </property>
+          <property name="icon">
+           <iconset resource="../resources.qrc">
+            <normaloff>:/qtgameengine/icons/arrow-up.png</normaloff>:/qtgameengine/icons/arrow-up.png</iconset>
+          </property>
          </widget>
         </item>
         <item row="1" column="0">
          <widget class="QPushButton" name="pushButtonAdd">
+          <property name="toolTip">
+           <string>Append a constant at the end of the list</string>
+          </property>
           <property name="text">
            <string>&amp;Add</string>
           </property>
+          <property name="icon">
+           <iconset resource="../resources.qrc">
+            <normaloff>:/qtgameengine/icons/add.png</normaloff>:/qtgameengine/icons/add.png</iconset>
+          </property>
          </widget>
         </item>
         <item row="1" column="1">
          <widget class="QPushButton" name="pushButtonClear">
+          <property name="toolTip">
+           <string>Clear all the constants</string>
+          </property>
           <property name="text">
            <string>&amp;Clear</string>
           </property>
+          <property name="icon">
+           <iconset resource="../resources.qrc">
+            <normaloff>:/qtgameengine/icons/new.png</normaloff>:/qtgameengine/icons/new.png</iconset>
+          </property>
          </widget>
         </item>
         <item row="1" column="2">
          <widget class="QPushButton" name="pushButtonDown">
+          <property name="toolTip">
+           <string>Moves the constant down</string>
+          </property>
           <property name="text">
            <string>Do&amp;wn</string>
           </property>
+          <property name="icon">
+           <iconset resource="../resources.qrc">
+            <normaloff>:/qtgameengine/icons/arrow-down.png</normaloff>:/qtgameengine/icons/arrow-down.png</iconset>
+          </property>
          </widget>
         </item>
         <item row="1" column="4">
          <widget class="QPushButton" name="pushButtonSave">
+          <property name="toolTip">
+           <string>Save the constants to a text file</string>
+          </property>
           <property name="text">
            <string>Sa&amp;ve</string>
           </property>
+          <property name="icon">
+           <iconset resource="../resources.qrc">
+            <normaloff>:/qtgameengine/icons/save.png</normaloff>:/qtgameengine/icons/save.png</iconset>
+          </property>
          </widget>
         </item>
        </layout>
diff --git a/drawingcanvaswidget.cpp b/drawingcanvaswidget.cpp
index 5ca3630..87d6112 100644
--- a/drawingcanvaswidget.cpp
+++ b/drawingcanvaswidget.cpp
@@ -27,11 +27,33 @@ void DrawingCanvasWidget::setScale(float scale)
 
 void DrawingCanvasWidget::paintEvent(QPaintEvent *ev)
 {
-    QWidget::paintEvent(ev);
-
     if (!m_pixmap)
+    {
+        QWidget::paintEvent(ev);
         return;
+    }
+
+    QBrush brush;
+    {
+        QPixmap pixmap{32, 32};
+        {
+            QPainter painter{&pixmap};
+            painter.setPen(Qt::NoPen);
+            painter.setBrush(Qt::gray);
+            painter.drawRect(0, 0, 16, 16);
+            painter.drawRect(16, 16, 16, 16);
+            painter.setBrush(Qt::white);
+            painter.drawRect(0, 16, 16, 16);
+            painter.drawRect(16, 0, 16, 16);
+        }
+        brush.setTexture(std::move(pixmap));
+    }
 
     QPainter painter{this};
-    painter.drawPixmap(QRect{QPoint{}, m_pixmap->size() * m_scale}, *m_pixmap);
+
+    painter.setPen(Qt::NoPen);
+    painter.setBrush(std::move(brush));
+    painter.drawRect(rect());
+
+    painter.drawPixmap(rect(), *m_pixmap);
 }
diff --git a/futurecpp.h b/futurecpp.h
index b67578c..e20a7c1 100644
--- a/futurecpp.h
+++ b/futurecpp.h
@@ -23,8 +23,11 @@ bit_cast(const From& src) noexcept
     return dst;
 }
 
+#if !__cpp_lib_to_underlying
 template <typename EnumT, typename = std::enable_if_t<std::is_enum<EnumT>{}>>
 constexpr std::underlying_type_t<EnumT> to_underlying(EnumT e) noexcept {
     return static_cast<std::underlying_type_t<EnumT>>(e);
 }
+#endif
 } // namespace std
+
diff --git a/icons/add.png b/icons/add.png
new file mode 100644
index 0000000..5ff8629
Binary files /dev/null and b/icons/add.png differ
diff --git a/icons/arrow-down.png b/icons/arrow-down.png
index b64010d..b41e4e6 100644
Binary files a/icons/arrow-down.png and b/icons/arrow-down.png differ
diff --git a/icons/arrow-left.png b/icons/arrow-left.png
index 1810182..6135f57 100644
Binary files a/icons/arrow-left.png and b/icons/arrow-left.png differ
diff --git a/icons/arrow-right.png b/icons/arrow-right.png
index 3775bf5..8555036 100644
Binary files a/icons/arrow-right.png and b/icons/arrow-right.png differ
diff --git a/icons/arrow-up.png b/icons/arrow-up.png
index f246160..da29bcc 100644
Binary files a/icons/arrow-up.png and b/icons/arrow-up.png differ
diff --git a/icons/info.png b/icons/info.png
new file mode 100644
index 0000000..d607b07
Binary files /dev/null and b/icons/info.png differ
diff --git a/icons/merge.png b/icons/merge.png
new file mode 100644
index 0000000..62bd3a8
Binary files /dev/null and b/icons/merge.png differ
diff --git a/icons/replace.png b/icons/replace.png
new file mode 100644
index 0000000..92fc543
Binary files /dev/null and b/icons/replace.png differ
diff --git a/icons/sort.png b/icons/sort.png
new file mode 100644
index 0000000..aa1a605
Binary files /dev/null and b/icons/sort.png differ
diff --git a/includedfilesmodel.cpp b/includedfilesmodel.cpp
index 8d35103..aebbf08 100644
--- a/includedfilesmodel.cpp
+++ b/includedfilesmodel.cpp
@@ -10,10 +10,13 @@ IncludedFilesModel::IncludedFilesModel(ProjectContainer &project, QObject *paren
 
 int IncludedFilesModel::rowCount(const QModelIndex &parent) const
 {
+    Q_UNUSED(parent)
     return 0;
 }
 
 QVariant IncludedFilesModel::data(const QModelIndex &index, int role) const
 {
+    Q_UNUSED(index)
+    Q_UNUSED(role)
     return {};
 }
diff --git a/main.cpp b/main.cpp
index 8546f97..da5f87b 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,6 +1,6 @@
 #include <QApplication>
 #include <QStyleFactory>
-#include <QDebug>
+#include <QCommandLineParser>
 
 #include "mainwindow.h"
 
@@ -21,9 +21,21 @@ int main(int argc, char *argv[])
 
     QApplication app(argc, argv);
 
+    QCoreApplication::setOrganizationDomain("brunner.ninja");
+    QCoreApplication::setOrganizationName("brunner.ninja");
+    QCoreApplication::setApplicationName("QtGameMaker");
+    QCoreApplication::setApplicationVersion("1.0");
+
+    QCommandLineParser parser;
+    parser.setApplicationDescription(QCoreApplication::applicationName());
+    parser.addHelpOption();
+    parser.addVersionOption();
+    parser.addPositionalArgument("project", "The project to open.");
+    parser.process(app);
+
     QApplication::setStyle(QStyleFactory::create("Windows"));
 
-    MainWindow mainWindow;
+    MainWindow mainWindow{parser.positionalArguments().value(0)};
     mainWindow.show();
 
     return app.exec();
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 57ae83e..d56de53 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -41,9 +41,10 @@ template<> struct PropertiesDialogForDetail<Room> { using Type = RoomPropertiesD
 template<typename T> using PropertiesDialogFor = typename PropertiesDialogForDetail<T>::Type;
 }
 
-MainWindow::MainWindow(QWidget *parent) :
+MainWindow::MainWindow(const QString &filePath, QWidget *parent) :
     QMainWindow{parent},
     m_ui{std::make_unique<Ui::MainWindow>()},
+    m_filePath{filePath},
     m_projectTreeModel{std::make_unique<ProjectTreeModel>(m_project, this)}
 {
     m_ui->setupUi(this);
@@ -145,6 +146,9 @@ MainWindow::MainWindow(QWidget *parent) :
             this, &MainWindow::changed);
 
     updateTitle();
+
+    if (!m_filePath.isEmpty())
+        loadFile(m_filePath);
 }
 
 void MainWindow::closeEvent(QCloseEvent *event)
@@ -388,58 +392,7 @@ void MainWindow::openFile()
     if (path.isEmpty())
         return;
 
-    ProjectContainer project;
-
-    {
-        QFile file{path};
-        if (!file.open(QIODevice::ReadOnly))
-        {
-            QMessageBox::warning(this, tr("Could not load game!"), tr("Could not load game!") + "\n\n" + file.errorString());
-            return;
-        }
-
-        QDataStream dataStream{&file};
-        dataStream >> project;
-    }
-
-    m_ui->mdiArea->closeAllSubWindows();
-    if (!m_ui->mdiArea->subWindowList().empty())
-        return;
-
-    if (m_unsavedChanges)
-    {
-        const auto result = QMessageBox::warning(
-            this,
-            tr("The Game has been modified."),
-            tr("Do you want to save your changes?"),
-            QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel,
-            QMessageBox::Save
-        );
-        switch (result)
-        {
-        case QMessageBox::Save:
-            saveFile();
-            if (m_unsavedChanges)
-                return;
-            else
-                break;
-        case QMessageBox::Discard:
-            break;
-        case QMessageBox::Cancel:
-            return;
-        default:
-            qWarning() << "unexpected dialog result" << result;
-            return;
-        }
-    }
-
-    m_project = std::move(project);
-    m_projectTreeModel->setProject(&m_project);
-
-    m_filePath = path;
-    m_unsavedChanges = false;
-
-    updateTitle();
+    loadFile(path);
 }
 
 void MainWindow::saveFile()
@@ -537,15 +490,18 @@ void MainWindow::create()
     {
         switch (m_projectTreeModel->nodeType(index))
         {
-        case ProjectTreeModel::NodeType::Sprite:
-        case ProjectTreeModel::NodeType::Sound:
-        case ProjectTreeModel::NodeType::Background:
-        case ProjectTreeModel::NodeType::Path:
-        case ProjectTreeModel::NodeType::Script:
-        case ProjectTreeModel::NodeType::Font:
-        case ProjectTreeModel::NodeType::TimeLine:
-        case ProjectTreeModel::NodeType::Object:
-        case ProjectTreeModel::NodeType::Room:
+        using NodeType = ProjectTreeModel::NodeType;
+        case NodeType::Root:
+            break;
+        case NodeType::Sprite:
+        case NodeType::Sound:
+        case NodeType::Background:
+        case NodeType::Path:
+        case NodeType::Script:
+        case NodeType::Font:
+        case NodeType::TimeLine:
+        case NodeType::Object:
+        case NodeType::Room:
             if (!m_projectTreeModel->insertRows(index.row(), 1, index.parent()))
                 QMessageBox::warning(this, tr("Inserting failed!"), tr("Inserting failed!"));
             break;
@@ -669,6 +625,8 @@ void MainWindow::about()
 
 void MainWindow::rowsInserted(const QModelIndex &parent, int first, int last)
 {
+    Q_UNUSED(last)
+
     m_ui->treeView->expand(parent);
     const auto index = m_projectTreeModel->index(first, 0, parent);
     m_ui->treeView->selectionModel()->select(index, QItemSelectionModel::ClearAndSelect);
@@ -701,6 +659,62 @@ void MainWindow::modelAboutToBeReset()
     modelAboutToBeResetFor<Room>();
 }
 
+void MainWindow::loadFile(const QString &path)
+{
+    ProjectContainer project;
+
+    {
+        QFile file{path};
+        if (!file.open(QIODevice::ReadOnly))
+        {
+            QMessageBox::warning(this, tr("Could not load game!"), tr("Could not load game!") + "\n\n" + file.errorString());
+            return;
+        }
+
+        QDataStream dataStream{&file};
+        dataStream >> project;
+    }
+
+    m_ui->mdiArea->closeAllSubWindows();
+    if (!m_ui->mdiArea->subWindowList().empty())
+        return;
+
+    if (m_unsavedChanges)
+    {
+        const auto result = QMessageBox::warning(
+            this,
+            tr("The Game has been modified."),
+            tr("Do you want to save your changes?"),
+            QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel,
+            QMessageBox::Save
+            );
+        switch (result)
+        {
+        case QMessageBox::Save:
+            saveFile();
+            if (m_unsavedChanges)
+                return;
+            else
+                break;
+        case QMessageBox::Discard:
+            break;
+        case QMessageBox::Cancel:
+            return;
+        default:
+            qWarning() << "unexpected dialog result" << result;
+            return;
+        }
+    }
+
+    m_project = std::move(project);
+    m_projectTreeModel->setProject(&m_project);
+
+    m_filePath = path;
+    m_unsavedChanges = false;
+
+    updateTitle();
+}
+
 void MainWindow::updateTitle()
 {
     setWindowTitle(tr("%0%1 - Qt Gamemaker 1.0 Ultimate")
@@ -726,6 +740,7 @@ void MainWindow::openOrActivateWindow(QMdiSubWindow * &ptr, Targs &&...args)
                 });
         connect(subwindow, &QMdiSubWindow::windowStateChanged,
                 action, [action](Qt::WindowStates oldState, Qt::WindowStates newState){
+                    Q_UNUSED(oldState)
                     action->setChecked(newState.testFlag(Qt::WindowActive));
                 });
         connect(dialog, &QWidget::windowTitleChanged, action, &QAction::setText);
@@ -770,6 +785,7 @@ bool MainWindow::doubleClickedFor(const QModelIndex &index)
                 });
         connect(subwindow, &QMdiSubWindow::windowStateChanged,
                 action, [action](Qt::WindowStates oldState, Qt::WindowStates newState){
+                    Q_UNUSED(oldState)
                     action->setChecked(newState.testFlag(Qt::WindowActive));
                 });
         connect(dialog, &QWidget::windowTitleChanged, action, &QAction::setText);
diff --git a/mainwindow.h b/mainwindow.h
index c57bb1f..3e670b9 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -16,7 +16,7 @@ class MainWindow : public QMainWindow
     Q_OBJECT
 
 public:
-    explicit MainWindow(QWidget *parent = nullptr);
+    explicit MainWindow(const QString &filePath, QWidget *parent = nullptr);
     ~MainWindow();
 
 protected:
@@ -64,6 +64,7 @@ private slots:
     void modelAboutToBeReset();
 
 private:
+    void loadFile(const QString &path);
     void updateTitle();
 
     template<typename T, typename ...Targs>
diff --git a/objectactionsmodel.cpp b/objectactionsmodel.cpp
new file mode 100644
index 0000000..44c829c
--- /dev/null
+++ b/objectactionsmodel.cpp
@@ -0,0 +1,19 @@
+#include "objectactionsmodel.h"
+
+ObjectActionsModel::ObjectActionsModel(QObject *parent) :
+    QAbstractListModel{parent}
+{
+}
+
+int ObjectActionsModel::rowCount(const QModelIndex &parent) const
+{
+    Q_UNUSED(parent)
+    return 0;
+}
+
+QVariant ObjectActionsModel::data(const QModelIndex &index, int role) const
+{
+    Q_UNUSED(index)
+    Q_UNUSED(role)
+    return {};
+}
diff --git a/objectactionsmodel.h b/objectactionsmodel.h
new file mode 100644
index 0000000..cbc4dd0
--- /dev/null
+++ b/objectactionsmodel.h
@@ -0,0 +1,14 @@
+#pragma once
+
+#include <QAbstractListModel>
+
+class ObjectActionsModel : public QAbstractListModel
+{
+    Q_OBJECT
+
+public:
+    explicit ObjectActionsModel(QObject *parent = nullptr);
+
+    int rowCount(const QModelIndex &parent) const override;
+    QVariant data(const QModelIndex &index, int role) const override;
+};
diff --git a/objecteventsmodel.cpp b/objecteventsmodel.cpp
new file mode 100644
index 0000000..9e2883a
--- /dev/null
+++ b/objecteventsmodel.cpp
@@ -0,0 +1,19 @@
+#include "objecteventsmodel.h"
+
+ObjectEventsModel::ObjectEventsModel(QObject *parent) :
+    QAbstractListModel{parent}
+{
+}
+
+int ObjectEventsModel::rowCount(const QModelIndex &parent) const
+{
+    Q_UNUSED(parent)
+    return 0;
+}
+
+QVariant ObjectEventsModel::data(const QModelIndex &index, int role) const
+{
+    Q_UNUSED(index)
+    Q_UNUSED(role)
+    return {};
+}
diff --git a/objecteventsmodel.h b/objecteventsmodel.h
new file mode 100644
index 0000000..1b44325
--- /dev/null
+++ b/objecteventsmodel.h
@@ -0,0 +1,14 @@
+#pragma once
+
+#include <QAbstractListModel>
+
+class ObjectEventsModel : public QAbstractListModel
+{
+    Q_OBJECT
+
+public:
+    explicit ObjectEventsModel(QObject *parent = nullptr);
+
+    int rowCount(const QModelIndex &parent) const override;
+    QVariant data(const QModelIndex &index, int role) const override;
+};
diff --git a/pathpointsmodel.cpp b/pathpointsmodel.cpp
index c27f79e..dd35a35 100644
--- a/pathpointsmodel.cpp
+++ b/pathpointsmodel.cpp
@@ -18,11 +18,13 @@ PathPointsModel::PathPointsModel(std::vector<Path::Point> &points, QObject *pare
 
 int PathPointsModel::rowCount(const QModelIndex &parent) const
 {
+    Q_UNUSED(parent)
     return m_points.size();
 }
 
 int PathPointsModel::columnCount(const QModelIndex &parent) const
 {
+    Q_UNUSED(parent)
     return NumberOfColumns;
 }
 
diff --git a/pathpointswidget.cpp b/pathpointswidget.cpp
index 594a873..8caa12e 100644
--- a/pathpointswidget.cpp
+++ b/pathpointswidget.cpp
@@ -66,6 +66,8 @@ void PathPointsWidget::setSelectedIndex(const std::optional<std::size_t> &select
 
 void PathPointsWidget::paintEvent(QPaintEvent *event)
 {
+    Q_UNUSED(event)
+
     if (m_showGrid)
     {
         if (!m_gridBrush || m_gridBrush->gridX != m_gridX || m_gridBrush->gridY != m_gridY)
@@ -174,6 +176,7 @@ createNew:
         }
         update();
         break;
+    default:;
     }
 }
 
@@ -186,6 +189,7 @@ void PathPointsWidget::mouseReleaseEvent(QMouseEvent *event)
     case Qt::LeftButton:
         m_dragIndex = std::nullopt;
         break;
+    default:;
     }
 }
 
diff --git a/projectcontainer.cpp b/projectcontainer.cpp
index 40600f8..f75ed9a 100644
--- a/projectcontainer.cpp
+++ b/projectcontainer.cpp
@@ -220,12 +220,22 @@ QDataStream &operator>>(QDataStream &ds, TimeLine &timeLine)
 QDataStream &operator<<(QDataStream &ds, const Object &object)
 {
     ds << object.name;
+    ds << object.spriteName;
+    ds << object.visible;
+    ds << object.solid;
+    ds << object.depth;
+    ds << object.persistent;
     return ds;
 }
 
 QDataStream &operator>>(QDataStream &ds, Object &object)
 {
     ds >> object.name;
+    ds >> object.spriteName;
+    ds >> object.visible;
+    ds >> object.solid;
+    ds >> object.depth;
+    ds >> object.persistent;
     return ds;
 }
 
diff --git a/projectcontainer.h b/projectcontainer.h
index 6339754..13dcd62 100644
--- a/projectcontainer.h
+++ b/projectcontainer.h
@@ -85,6 +85,11 @@ struct TimeLine
 struct Object
 {
     QString name;
+    QString spriteName;
+    bool visible{true};
+    bool solid{};
+    int depth{};
+    bool persistent{};
 };
 
 struct Room
diff --git a/projecttreemodel.cpp b/projecttreemodel.cpp
index ff134fc..0ba6269 100644
--- a/projecttreemodel.cpp
+++ b/projecttreemodel.cpp
@@ -6,7 +6,7 @@
 #include <utility>
 #include <algorithm>
 
-//#include "futurecpp.h"
+#include "futurecpp.h"
 #include "projectcontainer.h"
 
 namespace {
@@ -261,6 +261,8 @@ Qt::ItemFlags ProjectTreeModel::flags(const QModelIndex &index) const
 
     switch (nodeType(index))
     {
+    case NodeType::Root:
+        break;
     case NodeType::Sprite:
     case NodeType::Sound:
     case NodeType::Background:
@@ -297,6 +299,9 @@ bool ProjectTreeModel::setData(const QModelIndex &index, const QVariant &value,
 
 bool ProjectTreeModel::moveRows(const QModelIndex &sourceParent, int sourceRow, int count, const QModelIndex &destinationParent, int destinationChild)
 {
+    Q_UNUSED(destinationParent)
+    Q_UNUSED(destinationChild)
+
     qDebug() << sourceParent << sourceRow << count;
 
     return false;
@@ -602,36 +607,53 @@ QVariant ProjectTreeModel::iconFor<Background>(const Background &entry) const
 template<>
 QVariant ProjectTreeModel::iconFor<Path>(const Path &entry) const
 {
+    Q_UNUSED(entry)
     return QPixmap{":/qtgameengine/icons/path-file.png"}.scaled(16, 16);
 }
 
 template<>
 QVariant ProjectTreeModel::iconFor<Script>(const Script &entry) const
 {
+    Q_UNUSED(entry)
     return QPixmap{":/qtgameengine/icons/script-file.png"}.scaled(16, 16);
 }
 
 template<>
 QVariant ProjectTreeModel::iconFor<Font>(const Font &entry) const
 {
+    Q_UNUSED(entry)
     return QPixmap{":/qtgameengine/icons/font-file.png"}.scaled(16, 16);
 }
 
 template<>
 QVariant ProjectTreeModel::iconFor<TimeLine>(const TimeLine &entry) const
 {
+    Q_UNUSED(entry)
     return QPixmap{":/qtgameengine/icons/timeline-file.png"}.scaled(16, 16);
 }
 
 template<>
 QVariant ProjectTreeModel::iconFor<Object>(const Object &entry) const
 {
-    return QPixmap{":/qtgameengine/icons/object-file.png"}.scaled(16, 16);
+    if (m_project && !entry.spriteName.isEmpty())
+    {
+        const auto iter = std::find_if(std::cbegin(m_project->sprites), std::cend(m_project->sprites),
+                                       [&](const Sprite &sprite){ return sprite.name == entry.spriteName; });
+        if (iter == std::cend(m_project->sprites))
+            qWarning() << "sprite" << entry.spriteName << "not found";
+        else if (!iter->pixmaps.empty() && !iter->pixmaps.front().isNull())
+            return iter->pixmaps.front().scaled(16, 16, Qt::KeepAspectRatio);
+    }
+
+    QPixmap pixmap{16, 16};
+    pixmap.fill(Qt::white);
+    return pixmap;
 }
 
 template<>
 QVariant ProjectTreeModel::iconFor<Room>(const Room &entry) const
 {
+    Q_UNUSED(entry)
     return QPixmap{":/qtgameengine/icons/room-file.png"}.scaled(16, 16);
 }
 
diff --git a/projecttreemodel.h b/projecttreemodel.h
index 5569de4..42db0d4 100644
--- a/projecttreemodel.h
+++ b/projecttreemodel.h
@@ -49,7 +49,10 @@ public:
     Qt::DropActions supportedDragActions() const override;
     Qt::DropActions supportedDropActions() const override;
 
+    ProjectContainer *project() { return m_project; }
+    const ProjectContainer *project() const { return m_project; }
     void setProject(ProjectContainer *project);
+
     NodeType nodeType(const QModelIndex &index) const;
 
     template<typename T> QModelIndex rootFor() const;
diff --git a/resources.qrc b/resources.qrc
index 7e60e01..a9bb71d 100644
--- a/resources.qrc
+++ b/resources.qrc
@@ -71,5 +71,10 @@
         <file>icons/center.png</file>
         <file>icons/grid.png</file>
         <file>icons/constants.png</file>
+        <file>icons/add.png</file>
+        <file>icons/replace.png</file>
+        <file>icons/info.png</file>
+        <file>icons/merge.png</file>
+        <file>icons/sort.png</file>
     </qresource>
 </RCC>
diff --git a/spritesmodel.cpp b/spritesmodel.cpp
index e9fedeb..c7eed6c 100644
--- a/spritesmodel.cpp
+++ b/spritesmodel.cpp
@@ -11,6 +11,7 @@ SpritesModel::SpritesModel(const std::vector<QPixmap> &pixmaps, QObject *parent)
 
 int SpritesModel::rowCount(const QModelIndex &parent) const
 {
+    Q_UNUSED(parent)
     return m_pixmaps.size();
 }
 
diff --git a/timelineactionsmodel.cpp b/timelineactionsmodel.cpp
new file mode 100644
index 0000000..252b6de
--- /dev/null
+++ b/timelineactionsmodel.cpp
@@ -0,0 +1,19 @@
+#include "timelineactionsmodel.h"
+
+TimelineActionsModel::TimelineActionsModel(QObject *parent) :
+    QAbstractListModel{parent}
+{
+}
+
+int TimelineActionsModel::rowCount(const QModelIndex &parent) const
+{
+    Q_UNUSED(parent)
+    return 0;
+}
+
+QVariant TimelineActionsModel::data(const QModelIndex &index, int role) const
+{
+    Q_UNUSED(index)
+    Q_UNUSED(role)
+    return {};
+}
diff --git a/timelineactionsmodel.h b/timelineactionsmodel.h
new file mode 100644
index 0000000..570f66b
--- /dev/null
+++ b/timelineactionsmodel.h
@@ -0,0 +1,14 @@
+#pragma once
+
+#include <QAbstractListModel>
+
+class TimelineActionsModel : public QAbstractListModel
+{
+    Q_OBJECT
+
+public:
+    explicit TimelineActionsModel(QObject *parent = nullptr);
+
+    int rowCount(const QModelIndex &parent) const override;
+    QVariant data(const QModelIndex &index, int role) const override;
+};
diff --git a/timelinemomentsmodel.cpp b/timelinemomentsmodel.cpp
new file mode 100644
index 0000000..7132598
--- /dev/null
+++ b/timelinemomentsmodel.cpp
@@ -0,0 +1,19 @@
+#include "timelinemomentsmodel.h"
+
+TimelineMomentsModel::TimelineMomentsModel(QObject *parent) :
+    QAbstractListModel{parent}
+{
+}
+
+int TimelineMomentsModel::rowCount(const QModelIndex &parent) const
+{
+    Q_UNUSED(parent)
+    return 0;
+}
+
+QVariant TimelineMomentsModel::data(const QModelIndex &index, int role) const
+{
+    Q_UNUSED(index)
+    Q_UNUSED(role)
+    return {};
+}
diff --git a/timelinemomentsmodel.h b/timelinemomentsmodel.h
new file mode 100644
index 0000000..ce7326a
--- /dev/null
+++ b/timelinemomentsmodel.h
@@ -0,0 +1,14 @@
+#pragma once
+
+#include <QAbstractListModel>
+
+class TimelineMomentsModel : public QAbstractListModel
+{
+    Q_OBJECT
+
+public:
+    explicit TimelineMomentsModel(QObject *parent = nullptr);
+
+    int rowCount(const QModelIndex &parent) const override;
+    QVariant data(const QModelIndex &index, int role) const override;
+};
diff --git a/triggersmodel.cpp b/triggersmodel.cpp
index d511ea0..cf5e850 100644
--- a/triggersmodel.cpp
+++ b/triggersmodel.cpp
@@ -10,10 +10,13 @@ TriggersModel::TriggersModel(ProjectContainer &project, QObject *parent) :
 
 int TriggersModel::rowCount(const QModelIndex &parent) const
 {
+    Q_UNUSED(parent)
     return 0;
 }
 
 QVariant TriggersModel::data(const QModelIndex &index, int role) const
 {
+    Q_UNUSED(index)
+    Q_UNUSED(role)
     return {};
 }