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
}
		else if ( e.getSource( ).equals( btnPalette ) )
		{
			( (DifferenceSeries) series ).setPaletteLineColor( btnPalette.getSelection( ) );
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.swt.events.SelectionListener#widgetDefaultSelected(org.eclipse.swt.events.SelectionEvent)
	 */
	public void widgetDefaultSelected( SelectionEvent e )
	{
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.swt.widgets.Listener#handleEvent(org.eclipse.swt.widgets.Event)
	 */
	public void handleEvent( Event event )
	{
		if ( event.widget.equals( liacLine1 ) )
		{
			if ( event.type == LineAttributesComposite.VISIBILITY_CHANGED_EVENT )
			{
				( (DifferenceSeries) series ).getLineAttributes( )
						.setVisible( ( (Boolean) event.data ).booleanValue( ) );
				enableLinePaletteSetting( ( (DifferenceSeries) series ).getLineAttributes( )
						.isVisible( )
						|| ( (DifferenceSeries) series ).getNegativeLineAttributes( )