Bug 168839 Chart Legend Toggle Visibility does not work correctly for Pie chart in SVG[0001]
Description: Chart Legend Toggle Visibility does not work correctly . Build number: 2.1.2.v20061221-0710 Steps to reproduce: 1. Preview the attached design file. 2. Click the legend. Expected result: Toggle Visibility works correctly. Actual result: Pie slice of different color disappears when being click. Error log: N/A
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/DataPointHints.java
{
			return IConstants.NULL_STRING;
		}
		try
		{
			return ValueFormatter.format( oSeriesValue,
					fs,
					rtc.getULocale( ),
					null );
		}
		catch ( Exception ex )
		{
			logger.log( ILogger.ERROR,
					Messages.getString( "exception.parse.value.format.specifier", 
							new Object[]{
									oSeriesValue, fs
							},
							rtc.getULocale( ) ) );
		}
		return IConstants.NULL_STRING;
	}
	/**
	 * Returns the percentile orthogonal display value of current
	 * DataPointHintes using given format specifier.
	 * 
	 * @return
	 */
	private final String getPercentileOrthogonalDisplayValue( FormatSpecifier fs )
	{
		if ( oPercentileOrthogonalValue == null )