User Guide

List.labelField 789

The second usage example uses an on() handler and must be attached directly to a List

instance. The keyword

this, used inside an on() handler attached to a component, refers to

the component instance. For example, the following code, attached to the List instance

my_list, sends “_level0.my_list” to the Output panel:

on (itemRollOver) {

trace(this);

}

Example

The following example sends a message to the Output panel that indicates which item index

number has been rolled over:

var my_list:mx.controls.List;

my_list.addItem({data:"flash", label:"Flash"});

my_list.addItem({data:"dreamweaver", label:"Dreamweaver"});

my_list.addItem({data:"coldfusion", label:"ColdFusion"});

//Create listener object.

var listListener:Object = new Object();

listListener.itemRollOver = function (evt_obj:Object) {

trace("Item #" + evt_obj.index + " has been rolled over.");

};

//Add listener.

my_list.addEventListener("itemRollOver", listListener);