User Guide

Adding custom properties and methods to a component 103

The simplest way to write StateComboBoxDirectRef.mxml is to use the

mx.core.Application.application static property to write the index directly to the

Te xt A rea control, as the following example shows:

<?xml version="1.0"?>

<mx:ComboBox xmlns:mx="http://www.adobe.com/2006/mxml"

close="handleCloseEvent(event);">

<mx:Script>

<![CDATA[

import flash.events.Event;

import mx.core.Application;

public function handleCloseEvent(eventObj:Event):void {

mx.core.Application.application.myTAMain.text=

String(this.selectedIndex);

}

]]>

</mx:Script>

<mx:dataProvider>

<mx:String>AK</mx:String>

<mx:String>AL</mx:String>

</mx:dataProvider>

</mx:ComboBox>

In the previous example, you use the close event of the ComboBox control to write the

selectedIndex directly to the TextArea control in the main application. You must cast the

value of

selectedIndex to a String because the text property of the TextArea control is of

type String.