ItemRollOver for chart in AS3?

Question

I need to have a custom function fire on rollOver  for the individual wedges of a pie chart.
I can accomplish this if I instantiate the chart in the main Flex application like this;
<mx:PieChart id="pieChart"
                 dataProvider="{dataProviderName}"
                itemRollOver="pieWedgeRoll(event);"
                 >
        <mx:series>
            <mx:PieSeries
                field="myField"
              >
            </mx:PieSeries>
        </mx:series>
</mx:PieChart>
However, when I instantiate a pie chart using ActionScript like this;
    <fx:Script>
        <![CDATA[
               var myPieSeries:PieSeries = new PieSeries();
                myPieSeries.field="myField"
                var myChart:PieChart = new PieChart();
               myChart.itemRollOver="pieWedgeRoll(event);"
                myChart.dataProvider = dataProviderName
                myChart.series = [myPieSeries];
                myGroup.addElement(myChart);
    ]]>
    </fx:Script>
Flex throws and undefined property error.
Can someone please help??
Thanks.

Answer 1

Figured it out. Am still thinking like an AS2 coder.
Hope this helps someone in the future. 
Cheers. 
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
            xmlns:s="library://ns.adobe.com/flex/spark"
            xmlns:mx="library://ns.adobe.com/flex/mx"
            creationComplete="makePieChart();">
   <fx:Script>
      <![CDATA[
         //---imports---
         import mx.charts.PieChart;
         import mx.charts.events.ChartEvent;
         import mx.charts.events.ChartItemEvent;
         import mx.charts.series.PieSeries;
         import mx.charts.series.items.PieSeriesItem; 
         [Bindable]
         public var chartDP:Array = [
            {wedgeName:'Wedge 0', wedgeAmt:65},
            {wedgeName:'Wedge 1', wedgeAmt:70},
            {wedgeName:'Wedge 2', wedgeAmt:22},
            {wedgeName:'Wedge 3', wedgeAmt:8}
         //---build pie---
         private function makePieChart():void{
            var myPieSeries:PieSeries = new PieSeries();
            myPieSeries.field = "wedgeAmt";
            // Remove default dropshadow filter.
            myPieSeries.filters = [];
            // Define pie chart.
            var myChart:PieChart = new PieChart();
            myChart.height = 210;
            myChart.width = 210;
            myChart.name = "myPieName";
            myChart.addEventListener(ChartItemEvent.ITEM_ROLL_OVER, overFunction);
            myChart.addEventListener(ChartItemEvent.ITEM_CLICK, clickFunction);
            myChart.showDataTips = true;
            myChart.dataProvider = chartDP;
            myChart.series = [myPieSeries];
            //---custom functions---
            function overFunction(evt:ChartItemEvent):void {
               var psi:PieSeriesItem = evt.hitData.chartItem as PieSeriesItem;
               trace("An OVER event occurred: "+psi.item.wedgeName);
            function clickFunction(evt:ChartItemEvent):void {
               trace("A CLICK event occurred: "+evt.target.name);
            // Add myChart to the display list.
            myGroup.addElement(myChart);
      ]]>
   </fx:Script>
   <s:VGroup id="myGroup" />