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<? xml version="1.0" encoding="utf-8" ?>
<!-- http://blog.flexexamples.com/2008/07/04/creating-a-variable-row-height-item-renderer-on-a-combobox-control-in-flex/ -->
< mx:Application xmlns:mx ="http://www.adobe.com/2006/mxml"
layout ="vertical"
verticalAlign ="top"
backgroundColor ="white" >

< mx:Script >
<![CDATA[
import mx.events.DropdownEvent;

private function comboBox_open(evt:DropdownEvent):void {
evt.currentTarget.dropdown.variableRowHeight = true;
}
]]>
</ mx:Script >

< mx:Array id ="arr" >
< mx:Object name ="Baltimore Orioles" abbr ="BAL" />
< mx:Object name ="Boston Red Sox" abbr ="BOS" />
< mx:Object name ="Chicago White Sox" abbr ="CWS" />
< mx:Object name ="Cleveland Indians" abbr ="CLE" />
< mx:Object name ="Detroit Tigers" abbr ="DET" />
< mx:Object name ="Kansas City Royals" abbr ="KC" />
< mx:Object name ="Los Angeles Angels of Anaheim" abbr ="LAA" />
< mx:Object name ="Minnesota Twins" abbr ="MIN" />
< mx:Object name ="New York Yankees" abbr ="NYY" />
< mx:Object name ="Oakland Athletics" abbr ="OAK" />
< mx:Object name ="Seattle Mariners" abbr ="SEA" />
< mx:Object name ="Tampa Bay Devil Rays" abbr ="TB" />
< mx:Object name ="Texas Rangers" abbr ="TEX" />
< mx:Object name ="Toronto Blue Jays" abbr ="TOR" />
</ mx:Array >

< mx:ComboBox id ="comboBox"
dataProvider =" {arr} "
width ="140"
labelField ="name"
open ="comboBox_open(event);" >
< mx:itemRenderer >
< mx:Component >
< mx:Text selectable ="false"
toolTip =" {data.name} ({data.abbr}) " />
</ mx:Component >
</ mx:itemRenderer >
</ mx:ComboBox >

</ mx:Application >