Changing values in custom item renderer

Question

I have an xml feed that I am using to populate a List control. The list control has it's itemRenderer property set to CustomListItem which a custom component built by me to display various pieces of data from the xml along with an icon. At certain points I would like to ba able to tell one of the fields in CustomListItem to change from displaying xml.firstData to xml.secondData depending on a radio button selection but I can't find a way to access the properties of CustomListItem from main.mxml (which is where the radio buttons are).
At the moment the values in CustomListItem are set using functions within it to parse the 'data' property.
Sorry if this is a bit of a sketchy explanation of my problem Any suggestions would be great.
Cheers

Answer 1

I hope this code represents your situation, but at least I hope it helps you!
----------------------- main app ----------------------------
<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" width="100%"
  height="100%" creationComplete="dataRequest.send();"
  xmlns:comp="*" horizontalAlign="left">
  <mx:Script>
    <![CDATA[
      import mx.rpc.events.ResultEvent;
      import MyListItems;
      import mx.collections.XMLListCollection;
      [Bindable] private var xmllist:XMLList;
      [Bindable] private var xlc:XMLListCollection;
      private function resultHandler(evt:ResultEvent):void{
        xmllist = evt.result.item;
        xlc = new XMLListCollection(xmllist.firstData);
      private function changeData(evt:Event):void{
        if(evt.currentTarget.label == "First Data"){
          xlc = new XMLListCollection(xmllist..firstData);         
        }else{
          xlc = new XMLListCollection(xmllist.secondData);         
    ]]>
  </mx:Script>
  <mx:HTTPService id="dataRequest" useProxy="false" url="data.xml"
    resultFormat="e4x" result="resultHandler(event)"/>
  <mx:RadioButtonGroup id="items"/>
  <mx:RadioButton group="{items}" label="First Data" change="changeData(event)"
    selected="true"/>
  <mx:RadioButton group="{items}" label="Second Data" change="changeData(event)"/>
  <mx:List width="100" height="150" itemRenderer="MyListItems"
    dataProvider="{xlc}"/>
</mx:Application>
----------------------- item renderer --------------------------
<?xml version="1.0" encoding="utf-8"?>
<mx:HBox xmlns:mx="http://www.adobe.com/2006/mxml">
  <mx:Text text="{data}"/>
</mx:HBox>
------------------------------- data.xml ---------------------------
<?xml version="1.0" encoding="utf-8"?>
<mydata>
  <item>
    <firstData>apples</firstData>
    <secondData>oranges</secondData>
  </item>
  <item>
    <firstData>beef</firstData>
    <secondData>chicken</secondData>
  </item>
  <item>
    <firstData>milk</firstData>
    <secondData>juice</secondData>
  </item>
  <item>
    <firstData>carrot</firstData>
    <secondData>tomato</secondData>
  </item>
</mydata>