making sure we are using correct implementation for shades

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73266 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/carbon/graphics.cpp

@@ -2711,6 +2711,13 @@ void wxMacCoreGraphicsContext::DrawRectangle( wxDouble x, wxDouble y, wxDouble w
     if (m_composition == wxCOMPOSITION_DEST) 
         return; 
 
+    // when using shading, we have to go back to drawing paths 
+    if ( !m_brush.IsNull() && ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->IsShading() )
+    {
+        wxGraphicsContext::DrawRectangle( x,y,w,h );
+        return;
+    }
+
     CGRect rect = CGRectMake( (CGFloat) x , (CGFloat) y , (CGFloat) w , (CGFloat) h );
     if ( !m_brush.IsNull() )
     {