Render cell background in renderer only if rendering on propgrid canvas

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@56930 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/propgrid/editors.cpp

@@ -691,6 +691,8 @@ void wxPropertyGrid::OnComboItemPaint( const wxPGComboBox* pCb,
 
         if ( flags & wxODCB_PAINTING_CONTROL )
             renderFlags |= wxPGCellRenderer::Control;
+        else
+            renderFlags |= wxPGCellRenderer::ChoicePopup;
 
         if ( flags & wxODCB_PAINTING_SELECTED )
             renderFlags |= wxPGCellRenderer::Selected;

src/propgrid/property.cpp

@@ -149,7 +149,9 @@ int wxPGCellRenderer::PreDrawCell( wxDC& dc, const wxRect& rect, const wxPGCell&
         dc.SetTextForeground(cell.GetFgCol());
     }
 
-    // Draw Background
+    // Draw Background, but only if not rendering in control
+    // (as control already has rendered correct background).
+    if ( !(flags & (Control|ChoicePopup)) )
         dc.DrawRectangle(rect);
 
     const wxBitmap& bmp = cell.GetBitmap();