else if ( e.getSource( ).equals( btnPalette ) ) { ( (DifferenceSeries) series ).setPaletteLineColor( btnPalette.getSelection( ) ); }
	public void widgetSelected( SelectionEvent e )	{		if ( e.getSource( ).equals( btnCurve ) )		{			( (DifferenceSeries) series ).setCurve( btnCurve.getSelection( ) );		}	}