Enabling the use of masks for wxGTK in some of the demos

wxWindow.GetHandle returns the X-Window instead of the GtkWidget
pointer so the X-Window can be given to other Python modules such as
VTK.

wxPython.lib.vtk updated to get the window handle at widget creation
instead of in the constructor.

other updates


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5147 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

utils/wxPython/src/helpers.cpp

@@ -27,6 +27,11 @@
 
 #ifdef __WXGTK__
 #include <gtk/gtk.h>
+#include <gdk/gdkprivate.h>
+#include <wx/gtk/win_gtk.h>
+//#include <gdk/gdk.h>
+//#include <gdk/gdkx.h>
+//#include <gtk/gtkwindow.h>
 #endif
 
 
@@ -575,6 +580,25 @@ PyObject* wxPy_ConvertList(wxListBase* list, const char* className) {
     return pyList;
 }
 
+//----------------------------------------------------------------------
+
+long wxPyGetWinHandle(wxWindow* win) {
+#ifdef __WXMSW__
+    return (long)win->GetHandle();
+#endif
+
+    // Find and return the actual X-Window.
+#ifdef __WXGTK__
+    if (win->m_wxwindow) {
+        GdkWindowPrivate* bwin = (GdkWindowPrivate*)GTK_PIZZA(win->m_wxwindow)->bin_window;
+        if (bwin) {
+            return (long)bwin->xwindow;
+        }
+    }
+#endif
+    return 0;
+}
+
 //----------------------------------------------------------------------
 // Some helper functions for typemaps in my_typemaps.i, so they won't be
 // included in every file...