Add View::setWindowOpacity()

src/View.h

@@ -170,6 +170,7 @@ public:
     virtual void releaseKeyboard() = 0;
     virtual QScreen *screen() const = 0;
     virtual void setFocus(Qt::FocusReason) = 0;
+    virtual void setWindowOpacity(double) = 0;
 
     // TODOv2: Check if these two should be in the controller or on view
     virtual void onLayoutRequest()

src/ViewWrapper.cpp

@@ -181,3 +181,13 @@ void ViewWrapper::setFixedHeight(int)
 {
     qFatal("Not implemented");
 }
+
+void ViewWrapper::setWindowOpacity(double)
+{
+    qFatal("Not implemented");
+}
+
+void ViewWrapper::releaseKeyboard()
+{
+    qFatal("Not implemented");
+}

src/ViewWrapper.h

@@ -59,9 +59,8 @@ public:
     bool isActiveWindow() const override;
     void setFixedWidth(int) override;
     void setFixedHeight(int) override;
-    void releaseKeyboard() override
-    {
-    }
+    void setWindowOpacity(double) override;
+    void releaseKeyboard() override;
 
     /// TODOv2: Remove
     virtual DropArea *asDropArea() const

src/private/MDILayoutWidget.cpp

@@ -114,5 +114,5 @@ void MDILayoutWidget::resizeDockWidget(Controllers::Frame *frame, QSize size)
         return;
     }
 
-    item->setSize(size.expandedTo(frame->view()->asQWidget()->minimumSize()));
+    item->setSize(size.expandedTo(frame->view()->minSize()));
 }

src/private/WindowBeingDragged.cpp

@@ -67,7 +67,7 @@ WindowBeingDragged::WindowBeingDragged(Controllers::FloatingWindow *fw, Draggabl
         // Set opacity while dragging, if needed
         const qreal opacity = Config::self().draggedWindowOpacity();
         if (!qIsNaN(opacity) && !qFuzzyCompare(1.0, opacity))
-            fw->view()->asQWidget()->setWindowOpacity(opacity);
+            fw->view()->setWindowOpacity(opacity);
     }
 }
 
@@ -102,7 +102,7 @@ WindowBeingDragged::~WindowBeingDragged()
         // Restore opacity to fully opaque if needed
         const qreal opacity = Config::self().draggedWindowOpacity();
         if (!qIsNaN(opacity) && !qFuzzyCompare(1.0, opacity))
-            m_floatingWindow->view()->asQWidget()->setWindowOpacity(1);
+            m_floatingWindow->view()->setWindowOpacity(1);
     }
 }
 

src/qtquick/views/View_qtquick.h

@@ -20,6 +20,7 @@
 #include <QResizeEvent>
 #include <QSizePolicy>
 #include <QQuickItem>
+#include <QQuickWindow>
 
 #include <memory>
 
@@ -184,6 +185,12 @@ public:
         return {};
     }
 
+    void setWindowOpacity(double v) override
+    {
+        if (QWindow *w = QQuickItem::window())
+            w->setOpacity(v);
+    }
+
     void setSizePolicy(QSizePolicy) override
     {
     }

src/qtwidgets/views/View_qtwidgets.h

@@ -240,6 +240,11 @@ public:
         return {};
     }
 
+    void setWindowOpacity(double v) override
+    {
+        QWidget::setWindowOpacity(v);
+    }
+
     virtual QSize parentSize() const override
     {
         if (auto p = QWidget::parentWidget())