PieChart组件，单击击某部分的挤出插入动作.

itemClick事件
perWedgeExplodeRadius属性
示例：

代码：

<? xml version="1.0" encoding="utf-8" ?>
<!--  http://blog.flexexamples.com/2007/11/06/exploding-wedges-in-a-flex-piechart-control/  -->
< mx:Application  xmlns:mx ="http://www.adobe.com/2006/mxml"
        layout ="vertical"
        verticalAlign ="middle"
        backgroundColor ="white" >

     < mx:Script >
         <![CDATA[
            import mx.charts.events.ChartItemEvent;

            private function pieChart_itemClick(evt:ChartItemEvent):void {
                var arr:Array = [];
                arr[evt.hitData.chartItem.index] = 0.2;
                pieSeries.perWedgeExplodeRadius = arr;
            }
         ]]>
     </ mx:Script >

     < mx:XML  id ="dp" >
         < products >
             < product  label ="Product 1"  data ="3"   />
             < product  label ="Product 2"  data ="1"   />
             < product  label ="Product 3"  data ="4"   />
             < product  label ="Product 4"  data ="1"   />
             < product  label ="Product 5"  data ="5"   />
             < product  label ="Product 6"  data ="9"   />
         </ products >
     </ mx:XML >

     < mx:PieChart  id ="pieChart"
            dataProvider =" {dp.product} "
            selectionMode ="single"
            showDataTips ="true"
            itemClick ="pieChart_itemClick(event);"
            height ="250"
            width ="100%" >
         < mx:series >
             < mx:PieSeries  id ="pieSeries"  field ="@data" >
                 < mx:stroke >
                     < mx:Stroke  color ="black"  weight ="0"   />
                 </ mx:stroke >
                 < mx:filters >
                     < mx:Array  />
                 </ mx:filters >
             </ mx:PieSeries >
         </ mx:series >
     </ mx:PieChart >

</ mx:Application >