X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/0a81f130246a2c22a47e2eed31d1e640bf94e0fe..ad47660f9adc29f8d7b27d2c44f213007044e8b4:/src/msw/window.cpp?ds=sidebyside

diff --git a/src/msw/window.cpp b/src/msw/window.cpp
index d982f3ed22..165c03c207 100644
--- a/src/msw/window.cpp
+++ b/src/msw/window.cpp
@@ -182,6 +182,13 @@
 extern wxMenu *wxCurrentPopupMenu;
 #endif
 
+#if wxUSE_UXTHEME
+// This is a hack used by the owner-drawn wxButton implementation to ensure
+// that the brush used for erasing its background is correctly aligned with the
+// control.
+extern wxWindowMSW *wxWindowBeingErased = NULL;
+#endif // wxUSE_UXTHEME
+
 namespace
 {
 
@@ -4921,9 +4928,17 @@ wxWindowMSW::MSWGetBgBrushForChild(WXHDC hDC, wxWindowMSW *child)
 
 WXHBRUSH wxWindowMSW::MSWGetBgBrush(WXHDC hDC)
 {
+    // Use the special wxWindowBeingErased variable if it is set as the child
+    // being erased.
+    wxWindowMSW * const child =
+#if wxUSE_UXTHEME
+                                wxWindowBeingErased ? wxWindowBeingErased :
+#endif
+                                this;
+
     for ( wxWindowMSW *win = this; win; win = win->GetParent() )
     {
-        WXHBRUSH hBrush = win->MSWGetBgBrushForChild(hDC, this);
+        WXHBRUSH hBrush = win->MSWGetBgBrushForChild(hDC, child);
         if ( hBrush )
             return hBrush;