拖放功能

<?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"><mx:Script><![CDATA[import mx.managers.DragManager;import mx.collections.ArrayCollection;import mx.core.*;import mx.events.DragEvent;import mx.controls.Alert;import mx.events.ListEvent;private var i:int=0;[Bindable]private var targetData:ArrayCollection=new ArrayCollection(); /** * 拖动Label控件 */private function dragTest(initiator:Label,myData:String,event:MouseEvent,format:String):void{var ds:DragSource=new DragSource();ds.addData(myData,format);mx.managers.DragManager.doDrag(initiator,ds,event);}/** * 接受Label控件 */private function testDragEnter(event:DragEvent,format:String):void{mx.managers.DragManager.acceptDragDrop(IUIComponent(event.target));} /** * 添加Label数据到List */private function testDragDrop(event:DragEvent,format:String):void{i++;var myData:Object=new Object();myData=event.dragSource.dataForFormat(format);listTarget.dataProvider.addItem(myData + String(i));}private function listTarget_changeHandler(event:ListEvent):void{Alert.show(String(event.target.selectedItem));}]]></mx:Script><mx:Label id="dragLabel" text="Drag the label" x="441" y="47" mouseDown="dragTest(dragLabel,'This is the data.',event,'StringFormat')"/><mx:List id="listTarget" width="255" change="listTarget_changeHandler(event)" dataProvider="{targetData}" x="385" y="73" dragEnter="testDragEnter(event,'StringFormat')" dragDrop="testDragDrop(event,'StringFormat')"/></mx:Application>