if(this.provider instanceof FilterHandleProvider){ btnDown.setEnabled ( false ); btnUp.setEnabled( false ); }
	private void updateArraw( )	{		if ( style == SIMPLE_FUNCTION )		{			return;		}		int selectIndex = table.getSelectionIndex( );		int min = 0;		int max = table.getItemCount( ) - 1;		// if ( !( provider instanceof GroupHandleProvider ) )		// {		// max--;		// }		if ( selectIndex <= 0 )			btnUp.setEnabled( false );		else			btnUp.setEnabled( true );		if ( selectIndex >= max || ( selectIndex == -1 ) )		{			btnDown.setEnabled( false );			if ( selectIndex > max )				btnUp.setEnabled( false );		}		else			btnDown.setEnabled( true );		if ( ( min <= selectIndex ) && ( selectIndex <= max ) )		{			btnDel.setEnabled( true );			if ( btnEdit != null )				btnEdit.setEnabled( true );		}		else		{			btnDel.setEnabled( false );			if ( btnEdit != null )				btnEdit.setEnabled( false );		}	}