qtquick: Window resizing works on Linux/mac now

src/private/FloatingWindow.cpp

@@ -79,7 +79,7 @@ public:
     QPointer<FloatingWindow> m_floatingWindow;
 };
 }
-#endif
+#endif // Q_OS_WIN
 
 static Qt::WindowFlags windowFlagsToUse()
 {
@@ -150,7 +150,10 @@ FloatingWindow::FloatingWindow(MainWindowBase *parent)
     if (Config::self().flags() & Config::Flag_KeepAboveIfNotUtilityWindow)
         setWindowFlag(Qt::WindowStaysOnTopHint, true);
 
-    maybeCreateResizeHandler();
+    if (kddwUsesQtWidgets()) {
+        // QtQuick will do it a bit later, once it has a QWindow
+        maybeCreateResizeHandler();
+    }
 
     updateTitleBarVisibility();
     connect(m_dropArea, &MultiSplitter::visibleWidgetCountChanged, this, &FloatingWindow::onFrameCountChanged);
@@ -205,7 +208,7 @@ void FloatingWindow::setupWindow()
         MARGINS margins = {0, 0, 0, 1}; // arbitrary, just needs to be > 0 it seems
         DwmExtendFrameIntoClientArea(HWND(winId()), &margins);
     }
-#endif
+#endif // Q_OS_WIN
 }
 
 #if defined(Q_OS_WIN) && defined(KDDOCKWIDGETS_QTWIDGETS)
@@ -489,4 +492,3 @@ bool FloatingWindow::event(QEvent *ev)
 
     return QWidgetAdapter::event(ev);
 }
-

src/private/FloatingWindow_p.h

@@ -130,8 +130,8 @@ Q_SIGNALS:
     void numFramesChanged();
     void windowStateChanged(QWindowStateChangeEvent *);
 protected:
-
     void setupWindow();
+    void maybeCreateResizeHandler();
 
 #if defined(Q_OS_WIN) && defined(KDDOCKWIDGETS_QTWIDGETS)
     bool nativeEvent(const QByteArray &eventType, void *message, long *result) override;
@@ -144,7 +144,6 @@ protected:
     TitleBar *const m_titleBar;
 private:
     Q_DISABLE_COPY(FloatingWindow)
-    void maybeCreateResizeHandler();
     void onFrameCountChanged(int count);
     void onVisibleFrameCountChanged(int count);
     bool m_disableSetVisible = false;

src/private/WidgetResizeHandler.cpp

@@ -54,10 +54,11 @@ WidgetResizeHandler::~WidgetResizeHandler()
 
 bool WidgetResizeHandler::eventFilter(QObject *o, QEvent *e)
 {
-    if (s_disableAllHandlers || o != mTarget)
+    if (s_disableAllHandlers || o != mTarget) {
         return false;
+    }
 
-    auto widget = qobject_cast<QWidget*>(o);
+    auto widget = qobject_cast<QWidgetOrQuick*>(o);
     if (!widget || !widget->isTopLevel()) {
         return false;
     }

src/private/quick/FloatingWindowQuick.cpp

@@ -177,6 +177,8 @@ void FloatingWindowQuick::init()
 
     QWidgetAdapter::setParent(m_quickWindow->contentItem());
     setupWindow();
+    m_quickWindow->installEventFilter(this); // for window resizing
+    maybeCreateResizeHandler();
 
     m_visualItem = createItem(Config::self().qmlEngine(), QStringLiteral("qrc:/kddockwidgets/private/quick/qml/FloatingWindow.qml"));
     Q_ASSERT(m_visualItem);

src/private/quick/QWidgetAdapter_quick.cpp

@@ -559,9 +559,9 @@ void QWidgetAdapter::render(QPainter *)
     qWarning() << Q_FUNC_INFO << "Implement me";
 }
 
-void QWidgetAdapter::setMouseTracking(bool)
+void QWidgetAdapter::setMouseTracking(bool enabled)
 {
-    qWarning() << Q_FUNC_INFO << "Implement me";
+    m_mouseTrackingEnabled = enabled;
 }
 
 bool QWidgetAdapter::event(QEvent *ev)
@@ -572,6 +572,29 @@ bool QWidgetAdapter::event(QEvent *ev)
     return QQuickItem::event(ev);
 }
 
+bool QWidgetAdapter::eventFilter(QObject *watched, QEvent *ev)
+{
+    if (qobject_cast<QWindow*>(watched)) {
+        if (m_mouseTrackingEnabled) {
+            switch (ev->type()) {
+            case QEvent::MouseMove:
+            case QEvent::MouseButtonPress:
+            case QEvent::MouseButtonRelease:
+                ev->ignore();
+                qApp->sendEvent(this, ev);
+                //qDebug() << "Mouse event" << ev;
+                if (ev->isAccepted())
+                    return true;
+                break;
+            default:
+                break;
+            }
+        }
+    }
+
+    return QQuickItem::eventFilter(watched, ev);
+}
+
 void QWidgetAdapter::setWindowIsBeingDestroyed(bool is)
 {
     m_windowIsBeingDestroyed = is;

src/private/quick/QWidgetAdapter_quick_p.h

@@ -170,6 +170,7 @@ Q_SIGNALS:
 protected:
     void create();
     bool event(QEvent *) override;
+    bool eventFilter(QObject *, QEvent *) override;
     void geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry) override;
     void raiseAndActivate();
     virtual bool onResize(QSize newSize);
@@ -186,6 +187,7 @@ private:
     int m_widgetAttributes = 0; // Qt::WidgetAttribute
     Qt::FocusPolicy m_focusPolicy = Qt::NoFocus;
     bool m_windowIsBeingDestroyed = false;
+    bool m_mouseTrackingEnabled = false;
 };
 
 }