merged 2.4 branch into the trunk

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@18040 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk1/button.cpp

@@ -188,6 +188,15 @@ bool wxButton::Enable( bool enable )
     return TRUE;
 }
 
+bool wxButton::IsOwnGtkWindow( GdkWindow *window )
+{
+#ifdef __WXGTK20__
+    return GTK_BUTTON(m_widget)->event_window;
+#else
+    return (window == m_widget->window);
+#endif
+}
+
 void wxButton::ApplyWidgetStyle()
 {
     SetWidgetStyle();