+bool wxBitmapButton::SetBackgroundColour(const wxColour& colour)
+{
+ if ( !wxBitmapButtonBase::SetBackgroundColour(colour) )
+ {
+ // didn't change
+ return false;
+ }
+
+ // invalidate the brush, it will be recreated the next time it's needed
+ m_brushDisabled = wxNullBrush;
+
+ return true;
+}
+
+void wxBitmapButton::OnSysColourChanged(wxSysColourChangedEvent& event)
+{
+ m_brushDisabled = wxNullBrush;
+
+ if ( !IsEnabled() )
+ {
+ // this change affects our current state
+ Refresh();
+ }
+
+ event.Skip();
+}
+