if ( !isActive( ) ) { return; }
	public void elementChanged( DesignElementHandle focus, NotificationEvent ev )	{		super.elementChanged( focus, ev );		switch ( ev.getEventType( ) )		{			case NotificationEvent.CONTENT_EVENT :			{				markDirty( true );				if ( focus instanceof GridHandle )				{					addListenerToChildren( );					refreshChildren( );				}				break;			}			default :				break;		}	}