当前窗口与弹出窗口之间的数据交互

1. 首先，创建一个MXML应用PopupWindowTest.mxml，代码如下：

<?xml version="1.0" encoding="utf-8"?>
<!--
功能：弹出窗口测试
-->
<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">
	<s:layout>
		<s:BasicLayout/>
	</s:layout>

	<fx:Script>
		<![CDATA[
			import mx.managers.PopUpManager;
			
			//点击选择按钮后的处理方法
			protected function selectBT_clickHandler(event:MouseEvent):void{
				//创建弹出窗口
				var dialog:EmployeeListWindow = EmployeeListWindow(PopUpManager.createPopUp(
													this as DisplayObject,EmployeeListWindow,true));
				//设置弹出窗口的父窗口
				dialog.setParentWindow(this);
				//使弹出窗口居中显示
				PopUpManager.centerPopUp(dialog);
				
			}
		]]>
	</fx:Script>

	<fx:Declarations>
		<!-- 将非可视元素（例如服务、值对象）放在此处 -->
	</fx:Declarations>
	
	<mx:FormItem label="职工姓名：" x="10" y="10" >
		<s:HGroup>
			<s:TextInput id="employeeTI" /> <s:Button label="选择" id="selectBT" click="selectBT_clickHandler(event)" /> 
		</s:HGroup>
	</mx:FormItem>
</s:Application>

<?xml version="1.0" encoding="utf-8"?>
<!--
功能：弹出的员工列表窗口
-->
<s:TitleWindow xmlns:fx="http://ns.adobe.com/mxml/2009" 
			   xmlns:s="library://ns.adobe.com/flex/spark" 
			   xmlns:mx="library://ns.adobe.com/flex/mx" 
			   width="305" 
			   height="240"
			   horizontalCenter="0"  verticalCenter="0" 
			   creationComplete="init()"
			   >
	<s:layout>
		<s:BasicLayout />
	</s:layout>
	<fx:Script>
		<![CDATA[
			import mx.controls.Alert;
			import mx.events.CloseEvent;
			import mx.events.FlexEvent;
			import mx.events.ListEvent;
			import mx.managers.PopUpManager;
			
			//使用本窗口的窗口（父窗口）
			private var _parentWindow:PopupWindowTest = null;
			
			//设置父窗口
			public function setParentWindow(parentWindow:PopupWindowTest):void{
				_parentWindow =  parentWindow;
			}

			//页面加载完成后的初始化工作
			private function init():void
			{
				//判断引用本窗口的应用是否设置了父窗口属性
				if(_parentWindow == null){
					Alert.show("请为弹出窗口设置父窗口:setParentWindow(var parentWindow:PopupWindowTest)");
					this.closeWindow();
					return ;
				}
				this.title = "请选择员工";
				//为TitileWindow自带的关闭按钮（右上角的x型按钮）添加鼠标点击事件的监听器
				this.closeButton.addEventListener(MouseEvent.CLICK,closeFun);
				function closeFun(event:MouseEvent):void{
					closeWindow();
				}
			}
			
			//确认按钮点击后的处理方法
			private function sureBT_clickHandler(event:MouseEvent):void
			{
				//获取鼠标选中的行的name列的值
				var name:String = employeeAD.selectedItem['name'].toString();
				//设置父窗口中的id属性为employeeTI的文本框的text属性值
				_parentWindow.employeeTI.text = name;
				closeWindow();
			}
			
			//取消按钮点击后触发的方法
			private function cancelSelect():void{
				closeWindow();
			}
			
			//关闭本窗口
			private function closeWindow():void{
				PopUpManager.removePopUp(this);
			}

		]]>
	</fx:Script>
	<fx:Declarations>
		<!-- 为DataGrid提供的数据集 -->
		<fx:XMLList id="employeeList">
			<employee>
				<id>E00001</id>
				<name>张三</name>
				<birthday>1987-5-4</birthday>
			</employee>
			<employee>
				<id>E00002</id>
				<name>王五</name>
				<birthday>1988-11-8</birthday>
			</employee>
			<employee>
				<id>E00003</id>
				<name>李四</name>
				<birthday>1984-2-21</birthday>
			</employee>
			<employee>
				<id>E00004</id>
				<name>赵六</name>
				<birthday>1989-11-4</birthday>
			</employee>
			<employee>
				<id>E00005</id>
				<name>钱七</name>
				<birthday>1981-12-6</birthday>
			</employee>
		</fx:XMLList>
	</fx:Declarations>
	<s:VGroup>
		<mx:AdvancedDataGrid id="employeeAD" dataProvider="{employeeList}" >
			<mx:groupedColumns>
				<mx:AdvancedDataGridColumn dataField="id" headerText="员工ID"/>
				<mx:AdvancedDataGridColumn dataField="name" headerText="员工姓名" />
				<mx:AdvancedDataGridColumn dataField="birthday" headerText="员工生日" />
			</mx:groupedColumns>
		</mx:AdvancedDataGrid>
		<s:HGroup x="100" >
			<s:Button label="确定" id="sureBT" click="sureBT_clickHandler(event)"/>
			<s:Button label="取消" id="unsureBT" click="cancelSelect()"/>
		</s:HGroup>
	</s:VGroup>
</s:TitleWindow>