QmlProjectManager: Load QDS landing page content when it is needed

Task-number: QTCREATORBUG-27583
Change-Id: Ib329816f7282b0c6f88d78d62a0c9f34c961e509
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/plugins/qmlprojectmanager/qdslandingpage.cpp

@@ -30,6 +30,7 @@
 #include <coreplugin/icore.h>
 
 #include <QtQml/QQmlEngine>
+#include <QHBoxLayout>
 #include <QQuickItem>
 
 namespace QmlProjectManager {
@@ -38,51 +39,76 @@ namespace Internal {
 const char QMLRESOURCEPATH[] = "qmldesigner/propertyEditorQmlSources/imports";
 const char LANDINGPAGEPATH[] = "qmldesigner/landingpage";
 
-QdsLandingPage::QdsLandingPage(QWidget *parent)
-    : m_dialog{new QQuickWidget(parent)}
+QdsLandingPageWidget::QdsLandingPageWidget(QWidget* parent)
+    : QWidget(parent)
 {
-    setParent(m_dialog);
+    setLayout(new QHBoxLayout());
+    layout()->setContentsMargins(0, 0, 0, 0);
+}
+
+QdsLandingPageWidget::~QdsLandingPageWidget()
+{
+    if (m_widget)
+        m_widget->deleteLater();
+}
+
+QQuickWidget *QdsLandingPageWidget::widget()
+{
+    if (!m_widget) {
+        m_widget = new QQuickWidget();
+        layout()->addWidget(m_widget);
+    }
+
+    return m_widget;
+}
+
+QdsLandingPage::QdsLandingPage(QdsLandingPageWidget *widget, QWidget *parent)
+    : m_widget{widget->widget()}
+{
+    Q_UNUSED(parent)
+
+    setParent(m_widget);
 
     const QString resourcePath = Core::ICore::resourcePath(QMLRESOURCEPATH).toString();
     const QString landingPath = Core::ICore::resourcePath(LANDINGPAGEPATH).toString();
 
     qmlRegisterSingletonInstance<QdsLandingPage>("LandingPageApi", 1, 0, "LandingPageApi", this);
-    QdsLandingPageTheme::setupTheme(m_dialog->engine());
+    QdsLandingPageTheme::setupTheme(m_widget->engine());
 
-    m_dialog->setResizeMode(QQuickWidget::SizeRootObjectToView);
-    m_dialog->engine()->addImportPath(landingPath + "/imports");
-    m_dialog->engine()->addImportPath(resourcePath);
-    m_dialog->setSource(QUrl::fromLocalFile(landingPath + "/main.qml"));
+    m_widget->setResizeMode(QQuickWidget::SizeRootObjectToView);
+    m_widget->engine()->addImportPath(landingPath + "/imports");
+    m_widget->engine()->addImportPath(resourcePath);
+    m_widget->setSource(QUrl::fromLocalFile(landingPath + "/main.qml"));
 
-    if (m_dialog->rootObject()) { // main.qml only works with Qt6
-        connect(m_dialog->rootObject(), SIGNAL(openQtc(bool)), this, SIGNAL(openCreator(bool)));
-        connect(m_dialog->rootObject(), SIGNAL(openQds(bool)), this, SIGNAL(openDesigner(bool)));
-        connect(m_dialog->rootObject(), SIGNAL(installQds()), this, SIGNAL(installDesigner()));
-        connect(m_dialog->rootObject(), SIGNAL(generateCmake()), this, SIGNAL(generateCmake()));
-        connect(m_dialog->rootObject(), SIGNAL(generateProjectFile()), this, SIGNAL(generateProjectFile()));
+    if (m_widget->rootObject()) { // main.qml only works with Qt6
+        connect(m_widget->rootObject(), SIGNAL(openQtc(bool)), this, SIGNAL(openCreator(bool)));
+        connect(m_widget->rootObject(), SIGNAL(openQds(bool)), this, SIGNAL(openDesigner(bool)));
+        connect(m_widget->rootObject(), SIGNAL(installQds()), this, SIGNAL(installDesigner()));
+        connect(m_widget->rootObject(), SIGNAL(generateCmake()), this, SIGNAL(generateCmake()));
+        connect(m_widget->rootObject(), SIGNAL(generateProjectFile()), this, SIGNAL(generateProjectFile()));
     }
-    m_dialog->hide();
+    m_widget->hide();
 }
 
-QWidget* QdsLandingPage::dialog()
+QWidget *QdsLandingPage::widget()
 {
-    return m_dialog;
+    return m_widget;
 }
 
 void QdsLandingPage::show()
 {
-    m_dialog->rootObject()->setProperty("qdsInstalled", m_qdsInstalled);
-    m_dialog->rootObject()->setProperty("projectFileExists", m_projectFileExists);
-    m_dialog->rootObject()->setProperty("qtVersion", m_qtVersion);
-    m_dialog->rootObject()->setProperty("qdsVersion", m_qdsVersion);
-    m_dialog->rootObject()->setProperty("cmakeLists", m_cmakeResources);
-    m_dialog->rootObject()->setProperty("rememberSelection", Qt::Unchecked);
-    m_dialog->show();
+    m_widget->rootObject()->setProperty("qdsInstalled", m_qdsInstalled);
+    m_widget->rootObject()->setProperty("projectFileExists", m_projectFileExists);
+    m_widget->rootObject()->setProperty("qtVersion", m_qtVersion);
+    m_widget->rootObject()->setProperty("qdsVersion", m_qdsVersion);
+    m_widget->rootObject()->setProperty("cmakeLists", m_cmakeResources);
+    m_widget->rootObject()->setProperty("rememberSelection", Qt::Unchecked);
+    m_widget->show();
 }
 
 void QdsLandingPage::hide()
 {
-    m_dialog->hide();
+    m_widget->hide();
 }
 
 bool QdsLandingPage::qdsInstalled() const

src/plugins/qmlprojectmanager/qdslandingpage.h

@@ -42,6 +42,19 @@ public:
     DesignModeContext(QWidget *widget) { setWidget(widget); }
 };
 
+class QdsLandingPageWidget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    QdsLandingPageWidget(QWidget* parent = nullptr);
+    ~QdsLandingPageWidget();
+    QQuickWidget *widget();
+
+private:
+    QQuickWidget *m_widget = nullptr;
+};
+
 class QdsLandingPage : public QObject
 {
     Q_OBJECT
@@ -53,9 +66,9 @@ public:
     Q_PROPERTY(QString qdsVersion MEMBER m_qdsVersion READ qdsVersion WRITE setQdsVersion)
 
 public:
-    QdsLandingPage(QWidget *parent = nullptr);
+    QdsLandingPage(QdsLandingPageWidget *widget, QWidget *parent = nullptr);
 
-    QWidget *dialog();
+    QWidget *widget();
     void show();
     void hide();
 
@@ -80,7 +93,7 @@ signals:
     void generateProjectFile();
 
 private:
-    QQuickWidget *m_dialog = nullptr;
+    QQuickWidget *m_widget = nullptr;
 
     bool m_qdsInstalled = false;
     bool m_projectFileExists = false;

src/plugins/qmlprojectmanager/qmlprojectplugin.cpp

@@ -117,6 +117,7 @@ public:
                                       {runConfigFactory.runConfigurationId()}};
     QPointer<QMessageBox> lastMessageBox;
     QdsLandingPage *landingPage = nullptr;
+    QdsLandingPageWidget *landingPageWidget = nullptr;
 };
 
 QmlProjectPlugin::~QmlProjectPlugin()
@@ -125,6 +126,8 @@ QmlProjectPlugin::~QmlProjectPlugin()
         d->lastMessageBox->deleteLater();
     if (d->landingPage)
         d->landingPage->deleteLater();
+    if (d->landingPageWidget)
+        d->landingPageWidget->deleteLater();
     delete d;
 }
 
@@ -263,8 +266,19 @@ bool QmlProjectPlugin::initialize(const QStringList &, QString *errorMessage)
 
     d = new QmlProjectPluginPrivate;
 
-    if (!qmlDesignerEnabled())
-        initializeQmlLandingPage();
+    if (!qmlDesignerEnabled()) {
+        d->landingPageWidget = new QdsLandingPageWidget();
+
+        const QStringList mimeTypes = {QmlJSTools::Constants::QMLUI_MIMETYPE};
+        auto context = new Internal::DesignModeContext(d->landingPageWidget);
+        Core::ICore::addContextObject(context);
+
+        Core::DesignMode::registerDesignWidget(d->landingPageWidget, mimeTypes, context->context());
+
+        connect(Core::ModeManager::instance(), &Core::ModeManager::currentModeChanged,
+                this, &QmlProjectPlugin::editorModeChanged);
+    }
+
 
     ProjectManager::registerProjectType<QmlProject>(QmlJSTools::Constants::QMLPROJECT_MIMETYPE);
     Core::FileIconProvider::registerIconOverlayForSuffix(":/qmlproject/images/qmlproject.png",
@@ -366,23 +380,12 @@ bool QmlProjectPlugin::initialize(const QStringList &, QString *errorMessage)
 
 void QmlProjectPlugin::initializeQmlLandingPage()
 {
-    d->landingPage = new QdsLandingPage();
+    d->landingPage = new QdsLandingPage(d->landingPageWidget);
     connect(d->landingPage, &QdsLandingPage::openCreator, this, &QmlProjectPlugin::openQtc);
     connect(d->landingPage, &QdsLandingPage::openDesigner, this, &QmlProjectPlugin::openQds);
     connect(d->landingPage, &QdsLandingPage::installDesigner, this, &QmlProjectPlugin::installQds);
     connect(d->landingPage, &QdsLandingPage::generateCmake, this, &QmlProjectPlugin::generateCmake);
     connect(d->landingPage, &QdsLandingPage::generateProjectFile, this, &QmlProjectPlugin::generateProjectFile);
-
-    auto dialog = d->landingPage->dialog();
-
-    const QStringList mimeTypes = {QmlJSTools::Constants::QMLUI_MIMETYPE};
-    auto context = new Internal::DesignModeContext(dialog);
-    Core::ICore::addContextObject(context);
-
-    Core::DesignMode::registerDesignWidget(dialog, mimeTypes, context->context());
-
-    connect(Core::ModeManager::instance(), &Core::ModeManager::currentModeChanged,
-            this, &QmlProjectPlugin::editorModeChanged);
 }
 
 void QmlProjectPlugin::displayQmlLandingPage()
@@ -390,6 +393,9 @@ void QmlProjectPlugin::displayQmlLandingPage()
     const QString qtVersionString = ProjectFileContentTools::qtVersion(projectFilePath());
     const QString qdsVersionString = ProjectFileContentTools::qdsVersion(projectFilePath());
 
+    if (!d->landingPage)
+        initializeQmlLandingPage();
+
     d->landingPage->setQdsInstalled(qdsInstallationExists());
     d->landingPage->setProjectFileExists(projectFilePath().exists());
     d->landingPage->setCmakeResources(ProjectFileContentTools::rootCmakeFiles());
@@ -400,7 +406,8 @@ void QmlProjectPlugin::displayQmlLandingPage()
 
 void QmlProjectPlugin::hideQmlLandingPage()
 {
-    d->landingPage->hide();
+    if (d->landingPage)
+        d->landingPage->hide();
 }
 
 static bool isDesignerMode(Utils::Id mode)
@@ -430,7 +437,9 @@ void QmlProjectPlugin::openQtc(bool permanent)
     if (permanent)
         setAlwaysOpenWithMode(Core::Constants::MODE_EDIT);
 
-    hideQmlLandingPage();
+    if (d->landingPage)
+        hideQmlLandingPage();
+
     Core::ModeManager::activateMode(Core::Constants::MODE_EDIT);
 }
 
@@ -439,7 +448,9 @@ void QmlProjectPlugin::openQds(bool permanent)
     if (permanent)
         setAlwaysOpenWithMode(Core::Constants::MODE_DESIGN);
 
-    hideQmlLandingPage();
+    if (d->landingPage)
+        hideQmlLandingPage();
+
     auto editor = Core::EditorManager::currentEditor();
     if (editor)
         openInQDSWithProject(editor->document()->filePath());