Specifying a custom icon function on a ComboBox control in Flex
Problem
You want to display icons in a Flex ComboBox control's dropdown menu.
Solution
The following example shows how you can specify a custom icon function on a Flex ComboBox control by setting the iconFunction property on the ComboBox control’s dropdown menu.
Detailed explanation
<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/07/13/specifying-a-custom-icon-function-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;
[Embed("assets/status_online.png")]
private var statusOnline:Class;
private function comboBox_open(evt:DropdownEvent):void {
comboBox.dropdown.iconFunction = comboBoxDropdown_func;
}
private function comboBoxDropdown_func(item:Object):Class {
if (item.hasOwnProperty("online") && item.online) {
return statusOnline;
}
return null;
}
]]>
</mx:Script>
<mx:Array id="arr">
<mx:Object label="One" online="true" />
<mx:Object label="Two" />
<mx:Object label="Three" online="true" />
<mx:Object label="Four" />
<mx:Object label="Five" />
<mx:Object label="Six" />
<mx:Object label="Seven" online="true" />
<mx:Object label="Eight" />
<mx:Object label="Nine" />
<mx:Object label="Ten" />
</mx:Array>
<mx:ComboBox id="comboBox"
dataProvider="{arr}"
open="comboBox_open(event);" />
</mx:Application>
For more information, see "Specifying a custom icon function on a ComboBox control in Flex" at FlexExamples.com.
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