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
GridData gdTXTTooltipText = new GridData( GridData.FILL_BOTH );
			gdTXTTooltipText.horizontalSpan = 3;
			txtTooltipText.setLayoutData( gdTXTTooltipText );
		}
		else
		{
			txtTooltipText = new Text( cmpTooltip, SWT.BORDER | SWT.SINGLE );
			txtTooltipText.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
			btnTooltipExpBuilder = new Button( cmpTooltip, SWT.PUSH );
			GridData gdBTNBuilder = new GridData( );
			gdBTNBuilder.heightHint = 20;
			gdBTNBuilder.widthHint = 20;
			btnTooltipExpBuilder.setLayoutData( gdBTNBuilder );
			btnTooltipExpBuilder.setImage( UIHelper.getImage( "icons/obj16/expressionbuilder.gif" ) ); 
			btnTooltipExpBuilder.addSelectionListener( this );
			btnTooltipExpBuilder.setToolTipText( Messages.getString( "DataDefinitionComposite.Tooltip.InvokeExpressionBuilder" ) ); 
			btnTooltipExpBuilder.getImage( ).setBackground( btnTooltipExpBuilder.getBackground( ) );
			addDescriptionLabel( cmpTooltip,
					3,
					Messages.getString( "TriggerDataComposite.Label.TooltipUsingDataLabelOfSeries" ) ); 
		}
		
		cmpURL = new Composite( grpValue, SWT.NONE );
		cmpURL.setLayout( glURL );
		Label lblBaseURL = new Label( cmpURL, SWT.NONE );
		GridData gdLBLBaseURL = new GridData( );
		gdLBLBaseURL.horizontalIndent = 2;
		lblBaseURL.setLayoutData( gdLBLBaseURL );
		lblBaseURL.setText( Messages.getString( "TriggerDataComposite.Lbl.BaseURL" ) ); 
		btnBaseURL = new Button( cmpURL, SWT.NONE );