setting clipping correctly

[wxWidgets.git] / src / msw / window.cpp

diff --git a/src/msw/window.cpp b/src/msw/window.cpp
index 6908a7b317e5c7e22eb586056ac1cb7c160ac339..7f55f0db5bc6ce10aa7a20d22e3c82ea7ba84fee 100644 (file)
--- a/src/msw/window.cpp
+++ b/src/msw/window.cpp
@@ -1703,7 +1703,7 @@ void wxWindowMSW::DoGetPosition(int *x, int *y) const
         {
             if ( wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft )
             {
-                // In RTL mode, we want the logical left x-coordinate, 
+                // In RTL mode, we want the logical left x-coordinate,
                 // which would be the physical right x-coordinate.
                 point.x = rect.right;
             }
@@ -3950,6 +3950,19 @@ bool wxWindowMSW::HandlePower(WXWPARAM WXUNUSED_IN_WINCE(wParam),
 #endif
 }
 
+bool wxWindowMSW::IsDoubleBuffered() const
+{
+    for ( const wxWindowMSW *wnd = this;
+          wnd && !wnd->IsTopLevel(); wnd =
+          wnd->GetParent() )
+    {
+        if ( ::GetWindowLong(GetHwndOf(wnd), GWL_EXSTYLE) & WS_EX_COMPOSITED )
+            return true;
+    }
+
+    return false;
+}
+
 // ---------------------------------------------------------------------------
 // owner drawn stuff
 // ---------------------------------------------------------------------------