QmlDesigner.Instances: custom rendering for QQuickWindow

Change-Id: Id2d9bd6b7f5cecefffddece30bb93a69699beeff
Reviewed-by: Marco Bubke <marco.bubke@digia.com>

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

@@ -52,6 +52,24 @@ QObject *QuickWindowNodeInstance::parent() const
     return 0;
 }
 
+QImage QuickWindowNodeInstance::renderImage() const
+{
+    /*
+     Since the content item transucient
+     we just fill an image with the window color
+     */
+
+    QRectF renderBoundingRect = boundingRect();
+
+    QImage renderImage(renderBoundingRect.size().toSize(), QImage::Format_ARGB32_Premultiplied);
+
+    QPalette palette;
+
+    renderImage.fill(palette.color(QPalette::Window).rgba());
+
+    return renderImage;
+}
+
 QuickWindowNodeInstance::Pointer QuickWindowNodeInstance::create(QObject *object)
 {
     QQuickWindow *quickWindow = qobject_cast<QQuickWindow*>(object);

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

@@ -62,7 +62,7 @@ public:
 
     bool isAnchoredBySibling() const Q_DECL_OVERRIDE;
 
-
+    QImage renderImage() const Q_DECL_OVERRIDE;
 
 protected:
     QuickWindowNodeInstance(QQuickWindow*);