+ virtual void OnSetBitmap();
+
+ // invalidate m_brushDisabled when system colours change
+ void OnSysColourChanged(wxSysColourChangedEvent& event);
+
+ // change the currently bitmap if we have a hover one
+ void OnMouseEnterOrLeave(wxMouseEvent& event);
+
+
+ // the brush we use to draw disabled buttons
+ wxBrush m_brushDisabled;
+