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
1,
				Messages.getString( "TriggerDataComposite.Label.CallbackDescription" ) ); 
		
		cmpHighlight = new Composite( grpValue, SWT.NONE );
		cmpHighlight.setLayout( new GridLayout( ) );
		addDescriptionLabel( cmpHighlight,
				1,
				Messages.getString( "TriggerDataComposite.Label.HighlightDescription" ) ); 
		
		cmpVisiblity = new Composite( grpValue, SWT.NONE );
		cmpVisiblity.setLayout( new GridLayout( ) );
		addDescriptionLabel( cmpVisiblity,
				1,
				Messages.getString( "TriggerDataComposite.Label.VisiblityDescription" ) ); 
		
		cmpDPVisibility = new Composite( grpValue, SWT.NONE );
		cmpDPVisibility.setLayout( new GridLayout( ) );
		addDescriptionLabel( cmpDPVisibility,
				1,
				Messages.getString( "TriggerDataComposite.Label.DPVisibilityDescription" ) ); 
		
		cmpScript = new Composite( grpValue, SWT.NONE );
		cmpScript.setLayout( new GridLayout( 2, false ) );
		Label lblScript = new Label( cmpScript, SWT.NONE );
		{
			GridData gdLBLScript = new GridData( GridData.VERTICAL_ALIGN_BEGINNING );
			lblScript.setLayoutData( gdLBLScript );
			lblScript.setText( Messages.getString( "TriggerDataComposite.Lbl.Script" ) ); 
		}
		txtScript = new Text( cmpScript, SWT.MULTI | SWT.BORDER | SWT.V_SCROLL );