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
glURL.horizontalSpacing = 6;
		glURL.numColumns = 3;
		
		GridLayout glParameter = new GridLayout( );
		glParameter.marginWidth = 2;
		glParameter.marginHeight = 6;
		glParameter.horizontalSpacing = 6;
		glParameter.numColumns = 3;
		
		this.setLayout( glCMPTrigger );
		Label lblTriggerEvent = new Label( this, SWT.NONE );
		GridData gdLBLTriggerEvent = new GridData( );
		gdLBLTriggerEvent.horizontalIndent = 4;
		lblTriggerEvent.setLayoutData( gdLBLTriggerEvent );
		lblTriggerEvent.setText( Messages.getString( "TriggerDataComposite.Lbl.Event" ) ); 
		cmbTriggerType = new CTextCombo( this, SWT.NONE );
		GridData gdCMBTriggerType = new GridData( GridData.FILL_HORIZONTAL );
		cmbTriggerType.setLayoutData( gdCMBTriggerType );
		cmbTriggerType.addListener( new Listener( ) {
			public void handleEvent( Event event )
			{
				updateTrigger( lastTriggerType );
				updateActionTypeItems( );
				Trigger trigger = (Trigger) triggersMap.get( cmbTriggerType.getText( ) );
				
				if ( trigger != null && triggerMatrix.check( trigger ) )
				{
					cmbActionType.setText( getActionText( trigger ) );
				}
				else