Prepare() method gridItemRenderer Flex Hero

Question

Hi,
last week I installed Flash Builder Burrito to try the new spark dataGrid. I was testing the gridItemRenderer. I wanted to check something form the data and according to the results the item renderer should show three different conditions. But unfortunately I was unable to make the prepare() function work. I did it as was shown in Adobe TV (Deep Dive into Spark DataGrid) but even a trace() was not triggered.
Is this method not working or am I making something wrong?
Thanks for your help.

Answer 1

The Link is:
http://tv.adobe.com/watch/max-2010-develop/deep-dive-into-the-spark-datagrid-component-and -item-renderers-/
I created a dataGrid and inserted the following column:
<s:GridColumn dataField="status" headerText="VP" itemRenderer="itemRenderer.FirstItemRenderer">
which uses FirstItemRenderer as ItemRenderer. Here the code for FirstItemRenderer:
<?xml version="1.0" encoding="utf-8"?>
<s:GridItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009"
          xmlns:s="library://ns.adobe.com/flex/spark"
              xmlns:mx="library://ns.adobe.com/flex/mx"
>
<fx:Script>
     <![CDATA[
          import mx.events.FlexEvent;
// You SHOULD be able to use this method to programatically
// change the appearance of the data in this cell. However it doesn't
// seem to be called, yet. Probably a work in progress.
               override public function prepare( willBeRecycled:Boolean ):void {
                    labelSatus.text = "Result";
     /* protected function griditemrenderer1_creationCompleteHandler(event:FlexEvent):void
               labelSatus.text = "Result";
]]>
</fx:Script>
     <s:Label id="labelSatus"/>
</s:GridItemRenderer>
If I use the prepare method, the dataGrid is not populated with the label text "Result". But if I add a creationComplete Event to GridItemRenderer, the dataGrid column is populated with the "Result" text.
So, my question is am I using the prepare function wrong? Can you show me how to use it to make conditional checks on the data source?
Thanks in advance,