fixing redraw region

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@33561 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mac/carbon/window.cpp

@@ -576,6 +576,9 @@ void wxWindowMac::MacControlUserPaneDrawProc(wxInt16 part)
 {
     RgnHandle rgn = NewRgn() ;
     GetClip( rgn ) ;
+    int x = 0 , y = 0;
+    MacWindowToRootWindow( &x,&y ) ;
+    OffsetRgn( rgn , -x , -y ) ;
     wxMacWindowStateSaver sv( this ) ;
     SectRgn( rgn , (RgnHandle) MacGetVisibleRegion().GetWXHRGN() , rgn ) ;
     MacDoRedraw( rgn , 0 ) ;