flex图表鼠标事件

<?xml version="1.0"?><!-- charts/DataPointAlert.mxml --><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"><mx:Script><!--[CDATA[import mx.controls.Alert;import mx.charts.events.ChartItemEvent;import mx.collections.ArrayCollection;[Bindable]public var dataSet:ArrayCollection=new ArrayCollection([{Month: "Jan", Expenses: 1500}, {Month: "Feb", Expenses: 200}, {Month: "Mar", Expenses: 500}]);public function myHandler(e:ChartItemEvent):void{Alert.show("Chart data was clicked");}]]--></mx:Script><mx:Panel title="Clickable Column Chart"><mx:ColumnChart id="myChart"itemClick="myHandler(event)"dataProvider="{dataSet}"><mx:horizontalAxis><mx:CategoryAxis dataProvider="{dataSet}" categoryField="Month"/></mx:horizontalAxis><mx:series><mx:ColumnSeries yField="Expenses" displayName="Expenses"/></mx:series></mx:ColumnChart><mx:Legend dataProvider="{myChart}"/></mx:Panel></mx:Application>