videorenderer: Implement HWND-retrieval properly.

Change-Id: I5ab678eeaaba498e802cc73d08f884ea5dcc0161
Reviewed-on: http://codereview.qt-project.org/5889
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

1 files changed, 12 insertions, 2 deletions

diff --git a/src/3rdparty/phonon/ds9/videorenderer_vmr9.cpp b/src/3rdparty/phonon/ds9/videorenderer_vmr9.cpp
index cf4937b..3c957d6 100644
--- a/src/3rdparty/phonon/ds9/videorenderer_vmr9.cpp
+++ b/src/3rdparty/phonon/ds9/videorenderer_vmr9.cpp
@@ -34,10 +34,20 @@ QT_BEGIN_NAMESPACE
 
 namespace Phonon
 {
+    static inline QWindow *windowForWidget(QWidget *widget)
+    {
+        if (QWindow *window = widget->windowHandle())
+            return window;
+        if (QWidget *nativeParent = widget->nativeParentWidget())
+            return nativeParent->windowHandle();
+        return 0;
+    }
+
     static inline HWND hwndForWidget(QWidget *widget)
     {
-        QWindow *window = widget->windowHandle();
-        return static_cast<HWND> (QGuiApplication::platformNativeInterface()->nativeResourceForWindow("handle", window));
+        if (QWindow *window = windowForWidget(widget))
+            return static_cast<HWND> (QGuiApplication::platformNativeInterface()->nativeResourceForWindow("handle", window));
+        return 0;
     }
 
     static inline HDC getDC(const QWidget *widget)