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
txtTooltipText.setText( ( tooltipValue.getText( ) != null )
						? tooltipValue.getText( ) : "" ); 
				break;
			case INDEX_3_TOOGLE_VISABILITY :
				this.slValues.topControl = cmpVisiblity;
				
				
				
				
				
				break;
			case INDEX_4_SCRIPT :
				this.slValues.topControl = cmpScript;
				ScriptValue scriptValue = (ScriptValue) trigger.getAction( )
						.getValue( );
				txtScript.setText( ( scriptValue.getScript( ).length( ) > 0 )
						? scriptValue.getScript( ) : "" ); 
				break;
			case INDEX_5_HIGHLIGHT :
				this.slValues.topControl = cmpHighlight;
				
				
				
				
				
				
				
				break;
			case INDEX_6_CALLBACK :
				this.slValues.topControl = cmpCallback;