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
if ( index >= 0 )
			{
				triggersList.set( index, newTrigger );
			}
		}
		else
		{
			triggersList.add( newTrigger );
		}
		triggersMap.put( triggerType, newTrigger );
	}
	private String getAdvancedButtonText( boolean bAdvanced )
	{
		if ( bAdvanced )
		{
			return Messages.getString( "TriggerDataComposite.Text.OpenAdvanced" ); 
		}
		return Messages.getString( "TriggerDataComposite.Text.Advanced" ); 
	}
	
	private int getExpressionBuilderCommand( )
	{
		int type = this.triggerMatrix.getType( );
		if ( ( type & TriggerSupportMatrix.TYPE_DATAPOINT ) == TriggerSupportMatrix.TYPE_DATAPOINT )
		{
			return IUIServiceProvider.COMMAND_EXPRESSION_TRIGGERS_DATAPOINTS;
		}
		return IUIServiceProvider.COMMAND_EXPRESSION_TRIGGERS_SIMPLE;
	}
}