support masked or partially transparent windows in wxqt

include/wx/nonownedwnd.h

@@ -102,6 +102,8 @@ protected:
     #include "wx/osx/nonownedwnd.h"
 #elif defined(__WXMSW__)
     #include "wx/msw/nonownedwnd.h"
+#elif defined(__WXQT__)
+    #include "wx/qt/nonownedwnd.h"
 #else
     // No special class needed in other ports, they can derive both wxTLW and
     // wxPopupWindow directly from wxWindow and don't implement SetShape().

include/wx/qt/nonownedwnd.h

@@ -0,0 +1,30 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/qt/nonownedwnd.h
+// Author:      Sean D'Epagnier
+// Copyright:   (c) 2016 wxWidgets dev team
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_QT_NONOWNEDWND_H_
+#define _WX_QT_NONOWNEDWND_H_
+
+// ----------------------------------------------------------------------------
+// wxNonOwnedWindow contains code common to wx{Popup,TopLevel}Window in wxQT.
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_CORE wxNonOwnedWindow : public wxNonOwnedWindowBase
+{
+public:
+    wxNonOwnedWindow();
+
+protected:
+    virtual bool DoClearShape() wxOVERRIDE;
+    virtual bool DoSetRegionShape(const wxRegion& region) wxOVERRIDE;
+#if wxUSE_GRAPHICS_CONTEXT
+    virtual bool DoSetPathShape(const wxGraphicsPath& path) wxOVERRIDE;
+#endif // wxUSE_GRAPHICS_CONTEXT
+
+    wxDECLARE_NO_COPY_CLASS(wxNonOwnedWindow);
+};
+
+#endif // _WX_QT_NONOWNEDWND_H_