Creating a radio button item renderer on a Spark List control in Flex 4

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2010/05/20/creating-a-radio-button-item-renderer-on-a-spark-list-control-in-flex-4/ -->
<s:Application name="Spark_List_itemRenderer_RadioButton_test"
xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx">
<s:controlBarContent>
<s:Label text="selected RadioButton: {dgr1.selection.label}" />
</s:controlBarContent>
 
<fx:Declarations>
<s:RadioButtonGroup id="dgr1" selectedValue="Three" />
</fx:Declarations>
 
<s:List id="lst"
itemRenderer="skins.RadioButtonItemRen"
width="100"
horizontalCenter="0" verticalCenter="0">
<s:layout>
<s:VerticalLayout gap="0"
horizontalAlign="contentJustify"
requestedRowCount="6" />
</s:layout>
<s:dataProvider>
<s:ArrayList>
<fx:Object val="One" gr="{dgr1}" />
<fx:Object val="Two" gr="{dgr1}" />
<fx:Object val="Three" gr="{dgr1}" />
<fx:Object val="Four" gr="{dgr1}" />
<fx:Object val="Five" gr="{dgr1}" />
<fx:Object val="Six" gr="{dgr1}" />
<fx:Object val="Seven" gr="{dgr1}" />
<fx:Object val="Eight" gr="{dgr1}" />
<fx:Object val="Nine" gr="{dgr1}" />
</s:ArrayList>
</s:dataProvider>
</s:List>
 
</s:Application>

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2010/05/20/creating-a-radio-button-item-renderer-on-a-spark-list-control-in-flex-4/ -->
<s:ItemRenderer name="RadioButtonItemRen"
xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
autoDrawBackground="false"
dataChange="itemrenderer1_dataChangeHandler(event);">
 
<fx:Script>
<![CDATA[
protected function itemrenderer1_dataChangeHandler(evt:Event):void {
rdBtn.label = data.val;
rdBtn.value = data.val;
rdBtn.group = data.gr;
}
]]>
</fx:Script>
 
<s:RadioButton id="rdBtn"
left="3" right="3" top="5" bottom="5" />
 
</s:ItemRenderer>