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.reportitem.ui/src/org/eclipse/birt/chart/reportitem/ui/ChartReportItemBuilderImpl.java
{
					context.setOutputFormat( "PNG" ); 
				}
				else
					context.setOutputFormat( (String) of );
			}
			context.setExtendedItem( eih );
			context.setProcessor( new ChartReportStyleProcessor( eih, false ) );
			ChartWizardContext contextResult = (ChartWizardContext) chartBuilder.open( null,
					taskId,
					context );
			if ( contextResult != null && contextResult.getModel( ) != null )
			{
				
				commandStack.commit( );
				updateModel( eih,
						chartBuilder,
						crii,
						cm,
						contextResult.getModel( ),
						contextResult.getOutputFormat( ) );
				return Window.OK;
			}
			else if ( applyData[0] != null )
			{
				
				
				commandStack.rollback( );
				updateModel( eih,
						chartBuilder,