数据源改变后，BarChart组件的运动效果.

showDataEffect属性.
barSeries.xField 属性
barSeries.displayName 属性

示例：

代码：

<? xml version="1.0" encoding="utf-8" ?>
<!--  http://blog.flexexamples.com/2007/10/15/using-data-effects-to-animate-chart-data/  -->
< mx:Application  xmlns:mx ="http://www.adobe.com/2006/mxml"
        layout ="vertical"
        verticalAlign ="middle"
        backgroundColor ="white" >

     < mx:Script >
         <![CDATA[
            private function updateDP():void {
                var str:String = categoryFieldComboBox.selectedItem.data;
                barSeries.xField = str;
                barSeries.displayName = str;
            }
         ]]>
     </ mx:Script >

     < mx:SeriesInterpolate  id ="seriesInterpolate"  duration ="1000"   />
     < mx:SeriesSlide  id ="seriesSlide"  duration ="1000"  direction ="right"   />
     < mx:SeriesZoom  id ="seriesZoom"  duration ="1000"   />

     < mx:Array  id ="dataEffects" >
         < mx:Object  label ="seriesInterpolate"  data =" {seriesInterpolate} "   />
         < mx:Object  label ="seriesSlide"  data =" {seriesSlide} "   />
         < mx:Object  label ="seriesZoom"  data =" {seriesZoom} "   />
     </ mx:Array >

     < mx:Array  id ="categoryFields" >
         < mx:Object  data ="obp"  label ="OBP"   />
         < mx:Object  data ="slg"  label ="SLG"   />
         < mx:Object  data ="avg"  label ="AVG"   />
     </ mx:Array >

     < mx:ArrayCollection  id ="arrColl" >
         < mx:source >
             < mx:Array >
                 < mx:Object  name ="R Winn"  obp =".353"  slg =".445"  avg =".300"   />
                 < mx:Object  name ="P Feliz"  obp =".290"  slg =".418"  avg =".253"   />
                 < mx:Object  name ="O Vizquel"  obp =".305"  slg =".316"  avg =".246"   />
                 < mx:Object  name ="B Molina"  obp =".298"  slg =".433"  avg =".276"   />
                 < mx:Object  name ="R Durham"  obp =".295"  slg =".343"  avg =".218"   />
             </ mx:Array >
         </ mx:source >
     </ mx:ArrayCollection >

     < mx:ApplicationControlBar  dock ="true" >
         < mx:Form >
             < mx:FormItem  label ="categoryField:" >
                 < mx:ComboBox  id ="categoryFieldComboBox"
                    dataProvider =" {categoryFields} "
                        change ="updateDP();"   />
             </ mx:FormItem >
             < mx:FormItem  label ="showDataEffect:" >
                 < mx:ComboBox  id ="showDataEffectComboBox"
                        dataProvider =" {dataEffects} "
                        change ="updateDP();"   />
             </ mx:FormItem >
         </ mx:Form >
     </ mx:ApplicationControlBar >

      < mx:BarChart  id ="barChart"
             showDataTips ="true"
             dataProvider =" {arrColl} "
             width ="100%"
             height ="100%" >
         < mx:verticalAxis >
             < mx:CategoryAxis  categoryField ="name" />
         </ mx:verticalAxis >
         < mx:series >
             < mx:BarSeries  id ="barSeries"
                    yField ="name"
                    xField ="obp"
                    displayName ="obp"
                    showDataEffect =" {showDataEffectComboBox.selectedItem.data} "   />
         </ mx:series >
     </ mx:BarChart >

</ mx:Application >