Bug 315366 "Auto" for Curve Fitting Line is not black but transparent
Description: "Auto" for Curve Fitting Line is not black but transparent. Build number: 2.6.0.v20100602-0949 Steps to reproduce: 1. New a chart, in Format Chart->Series->Value (Y) Series, tick "Shown Curve Fitting Line", click "Curve Fitting Line" button. 2. Select "Auto" for Color. Expected result: The line is shown with color black. Actual result: The line disappears. Error log: N/A
chart/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/series/DifferenceSeriesAttributeComposite.java
true );
		liacLine1.addListener( this );
		
		grpLine2 = new Group( grpLine, SWT.NONE );
		{
			GridData gdGRPLine = new GridData( GridData.FILL_BOTH );
			grpLine2.setLayout( new FillLayout( ) );
			grpLine2.setLayoutData( gdGRPLine );
			grpLine2.setText( Messages.getString( "DifferenceSeriesAttributeComposite.Lbl.NegativeLine" ) ); 
		}
		liacLine2 = new LineAttributesComposite( grpLine2,
				SWT.NONE,
				context,
				( (DifferenceSeries) series ).getNegativeLineAttributes( ),
				true,
				true,
				true );
		liacLine2.addListener( this );
		
		Composite cmpButton = new Composite( grpLine, SWT.NONE );
		{
			GridData gd = new GridData( );
			gd.horizontalSpan = 2;
			cmpButton.setLayoutData( gd );
			cmpButton.setLayout( new GridLayout( 2, true ) );
		}
		
		btnPalette = new Button( cmpButton, SWT.CHECK );
		{
			btnPalette.setLayoutData( new GridData( ) );