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
* (non-Javadoc)
	 * 
	 * @see org.eclipse.swt.events.SelectionListener#widgetDefaultSelected(org.eclipse.swt.events.SelectionEvent)
	 */
	public void widgetDefaultSelected( SelectionEvent e )
	{
	}
	private String getActionText( Trigger trigger )
	{
		return LiteralHelper.actionTypeSet.getDisplayNameByName( trigger.getAction( )
				.getType( )
				.getName( ) );
	}
	private void updateTrigger( String triggerType )
	{
		if ( triggerType == null || triggerType.length( ) == 0 )
		{
			return;
		}
		if ( cmbActionType.getSelectionIndex( ) <= 0 )
		{
			cmbTriggerType.unmarkSelection( triggerType );
			return;
		}
		cmbTriggerType.markSelection( triggerType );
		Object oldTrigger = triggersMap.get( triggerType );
		Object newTrigger = getTrigger( );
		if ( oldTrigger != null )
		{
			int index = triggersList.indexOf( oldTrigger );