Bug 198031 Legend interactivity does not work correctly for drill-throughs
Under Value (Y) Series enable interactivity for the event "Mouse Click" Set action to Hyperlink The type of the hyperlink is Drill-through and the target is the a sub-report Pass parameter to sub-report as row["value_of_the_legend_item"] Suppose there are 3 values, x,y and z No matter which legend item you click (x, y or z), z gets passed as param to the subreport
chart/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/composites/TriggerDataComposite.java
else if ( e.getSource( ).equals( btnBaseURL ) )
		{
			try
			{
				if ( wizardContext != null )
				{
					sBaseURL = wizardContext.getUIServiceProvider( )
							.invoke( IUIServiceProvider.COMMAND_HYPERLINK,
									sBaseURL,
									wizardContext.getExtendedItem( ),
									null );
				}
			}
			catch ( ChartException ex )
			{
				ChartWizard.displayException( ex );
			}
		}
		else if ( e.getSource( ).equals( btnAdvanced ) )
		{
			bAdvanced = !bAdvanced;
			btnAdvanced.setText( getAdvancedButtonText( bAdvanced ) );
			grpParameters.setVisible( bAdvanced );
			this.slValues.topControl = cmpURL;
			grpValue.layout( true, true );
		}
		else if ( e.getSource( ).equals( btnTooltipExpBuilder ) )
		{
			try
			{