Flex DataGrid 之间拖动

<?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" minWidth="955" minHeight="600"> ??? <fx:Script> ??? ??? <![CDATA[ ??? ??? ??? import mx.controls.Alert; ??? ??? ??? import mx.events.DragEvent; ??? ??? ??? private var adgTargetDp:ArrayCollection = new ArrayCollection(); ??? ??? ??? <!--处理单击删除按钮事件 --> ??? ??? ??? protected function btnDel_clickHandler(event:MouseEvent):void ??? ??? ??? { ??? ??? ??? ??? //获取用户选择行的书籍编号 ??? ??? ??? ??? var selIndex:int = this.adgTarget.selectedIndex; ??? ??? ??? ??? if(selIndex<0) ??? ??? ??? ??? { ??? ??? ??? ??? ??? Alert.show("没有选择行，不能删除","bookArrayCollection组件使用方法示例演示"); ??? ??? ??? ??? ??? return; ??? ??? ??? ??? } ??? ??? ??? ??? this.bookArrayCollection.removeItemAt(selIndex); ??? ??? ??? } ??? ??? ??? protected function adgFrom_dragStartHandler(event:DragEvent):void ??? ??? ??? { ??? ??? ??? ??? //将目标对象dropEnabled 置为true，表示允许拖放 ??? ??? ??? ??? this.adgTarget.dropEnabled = true; ??? ??? ??? } ??? ??? ??? protected function adgTarget_dragDropHandler(event:DragEvent):void ??? ??? ??? { ??? ??? ??? ??? //获取用户拖放的数据行 ??? ??? ??? ??? var dgRow:Object = event.dragSource.dataForFormat("items")[0];??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? //如果拖放的目标数据在目标对象中??? ??? ??? ??? ??? ??? ??? ??? if(this.adgTargetDp.contains(dgRow)) ??? ??? ??? ??? { ??? ??? ??? ??? ??? Alert.show("目标对象已经存在此数据行！","拖放功能示例演示"); ??? ??? ??? ??? ??? this.adgTarget.dropEnabled=false; ??? ??? ??? ??? } ??? ??? ??? ??? else ??? ??? ??? ??? { ??? ??? ??? ??? ??? this.adgTargetDp.addItem(dgRow);??? ??? ??? ??? ??? }??? ??? ??? ??? ??? ??? ??? } ??? ??? ]]> ??? </fx:Script> ??? <fx:Declarations> ??? ??? <!-- 定义ArrayCollection实例，表示书籍列表--> ??? ??? <s:ArrayCollection id="bookArrayCollection"> ??? ??? ??? <fx:Object bookId="B001" bookType="程序" bookName="JAVA"/> ??? ??? ??? <fx:Object bookId="B002" bookType="程序" bookName="JSP"/> ??? ??? ??? <fx:Object bookId="B003" bookType="程序" bookName="FLEX"/> ??? ??? ??? <fx:Object bookId="B004" bookType="平面" bookName="PHOTOSHOP"/> ??? ??? ??? <fx:Object bookId="B005" bookType="平面" bookName="COREDRAW"/> ??? ??? ??? <fx:Object bookId="B006" bookType="办公" bookName="WORD"/> ??? ??? ??? <fx:Object bookId="B007" bookType="办公" bookName="EXCEL"/> ??? ??? ??? <fx:Object bookId="B008" bookType="办公" bookName="OUTLOOK"/> ??? ??? </s:ArrayCollection> ??? </fx:Declarations> ??? ??? <s:Panel? horizontalCenter="0" verticalCenter="0" width="636" height="411" title="拖拽示例演示"> ??? ??? <mx:AdvancedDataGrid? id="adgFrom" designViewDataType="tree" dataProvider="{bookArrayCollection}" ??? ??? ??? ??? ??? ??? ??? ? left="0" right="0" top="0" bottom="189" dragEnabled="true" ??? ??? ??? ??? ??? ??? ??? ? dragStart="adgFrom_dragStartHandler(event)"> ??? ??? ??? <mx:columns> ??? ??? ??? ??? <mx:AdvancedDataGridColumn headerText="编号" dataField="bookId"/> ??? ??? ??? ??? <mx:AdvancedDataGridColumn headerText="类型" dataField="bookType"/> ??? ??? ??? ??? <mx:AdvancedDataGridColumn headerText="名称" dataField="bookName"/> ??? ??? ??? </mx:columns> ??? ??? </mx:AdvancedDataGrid> ??? ??? ??? ??? <mx:AdvancedDataGrid? id="adgTarget" designViewDataType="tree"? dropEnabled="true"??? ??? ??? ??? ??? ??? ??? ? ??? ??? ??? ??? ??? ??? ??? ? dragDrop="adgTarget_dragDropHandler(event)" ??? ??? ??? ??? ??? ??? ??? ? left="0" right="0" top="223" height="125"> ??? ??? ??? <mx:columns> ??? ??? ??? ??? <mx:AdvancedDataGridColumn headerText="编号" dataField="bookId"/> ??? ??? ??? ??? <mx:AdvancedDataGridColumn headerText="类型" dataField="bookType"/> ??? ??? ??? ??? <mx:AdvancedDataGridColumn headerText="名称" dataField="bookName"/> ??? ??? ??? </mx:columns> ??? ??? </mx:AdvancedDataGrid> ??? ??? <s:Rect left="0" bottom="0" right="0" height="30"> ??? ??? ??? <s:fill> ??? ??? ??? ??? <s:SolidColor color="#E2EDF7"/> ??? ??? ??? </s:fill> ??? ??? </s:Rect> ??? ??? <s:Button x="170" y="352" label="删除" click="btnDel_clickHandler(event)"/> ??? </s:Panel> </s:Application>