复制代码 代码如下:

<?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"

creationComplete="initApp()">

<s:layout>

<s:HorizontalLayout horizontalAlign="center" verticalAlign="middle"/>

</s:layout>

<fx:Script>

<![CDATA[

import mx.controls.Alert;

import mx.events.DataGridEvent;

import mx.events.FlexEvent;

import spark.events.GridEvent;

private var myContextMenu:ContextMenu;

private function initApp():void

{

popUpMenu();

}

private function popUpMenu():void

{

myContextMenu = new ContextMenu();

removeDefaultItems();

addCustomMenuItems();

//监听右键菜单弹出后的事件

myContextMenu.addEventListener(ContextMenuEvent.MENU_SELECT, menuSelectedHandler);

myDataGrid.contextMenu = myContextMenu;

}

//删除原有菜单项

private function removeDefaultItems():void

{

myContextMenu.hideBuiltInItems();

var defaultItems:ContextMenuBuiltInItems = myContextMenu.builtInItems;

defaultItems.print = false;

}

//添加用户自定义菜单项

private function addCustomMenuItems():void

{

var item:ContextMenuItem = new ContextMenuItem("删除行");

//默认的菜单项

item.visible = false;

myContextMenu.customItems.push(item);

//监听选择菜单项后的事件

item.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT, itemSelectedHandler);

}

//弹出菜单后的事件处理函数

private function menuSelectedHandler(event:ContextMenuEvent):void

{

var item:ContextMenuItem = myContextMenu.customItems[0] as ContextMenuItem;

if (myDataGrid.selectedIndex >= 0)

{

item.visible = true;

}

else

{

item.visible = false;

}

}

//选择菜单项后的事件处理函数

private function itemSelectedHandler(event:ContextMenuEvent):void

{

if (myDataGrid.selectedIndex >= 0)

{

myDataGrid.dataProvider.removeItemAt(myDataGrid.selectedIndex);

}

}

]]>

</fx:Script>

<s:DataGrid requestedRowCount="4" id="myDataGrid"

width="500">

<s:columns>

<s:ArrayList>

<s:GridColumn dataField="dataField1" headerText="列 1" id="col1"></s:GridColumn>

<s:GridColumn dataField="dataField2" headerText="列 2"></s:GridColumn>

<s:GridColumn dataField="dataField3" headerText="列 3"></s:GridColumn>

</s:ArrayList>

</s:columns>

<s:typicalItem>

<fx:Object dataField1="示例数据" dataField2="示例数据" dataField3="示例数据"></fx:Object>

</s:typicalItem>

<s:ArrayList>

<fx:Object dataField1="数据1" dataField2="数据1" dataField3="数据1"></fx:Object>

<fx:Object dataField1="数据2" dataField2="数据2" dataField3="数据2"></fx:Object>

<fx:Object dataField1="数据3" dataField2="数据3" dataField3="数据3"></fx:Object>

<fx:Object dataField1="数据4" dataField2="数据4" dataField3="数据4"></fx:Object>

</s:ArrayList>

</s:DataGrid>

</s:Application>