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
{
			cmbActionType.select( 0 );
			slValues.topControl = cmpDefault;
		}
	}
	
	/**
	 * Updates Combo items after TriggerCondition change
	 */
	private void updateActionTypeItems( )
	{
		TriggerCondition condition = TriggerCondition.getByName( LiteralHelper.triggerConditionSet.getNameByDisplayName( cmbTriggerType.getText( ) ) );
		cmbActionType.setItems( this.triggerMatrix.getSupportedActionsDisplayName( condition ) );
		
		cmbActionType.add( Messages.getString( "TriggerDataComposite.Lbl.None" ), 0 ); 
	}
	/**
	 * Provides a mapper method to switch trigger Combo text to fixed index
	 * constants.
	 * 
	 * @return fixed index defined as constants
	 */
	private int getTriggerIndex( )
	{
		
		if ( cmbActionType.getText( )
				.equals( LiteralHelper.actionTypeSet.getDisplayNameByName( ActionType.SHOW_TOOLTIP_LITERAL.getName( ) ) ) )
		{
			return INDEX_2_TOOLTIP;
		}