使用弹出窗体修改数据,之后返回值

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初次使用Flex,希望在程序中能使用弹出窗口的类型,就是有A、B两个窗体，B从A中弹出，并显示A中的指定数据且可修改，修改完成后的数据更新到A中：

A窗体：

<? 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.PopUpManager;
???????????? private ?var?_win1:win1? = ? new ?win1();
???????????? private ?function?showWin1(): void {
????????????????_win1.s_tmp? = ? this .p_txt.text;
????????????????PopUpManager.addPopUp(_win1,? this ,? true );
????????????????PopUpManager.centerPopUp(_win1);
????????????????_win1.addEventListener( " t1 " ,?update);
????????????}
???????????? private ?function?update(evt:Event): void {
???????????????? this .p_txt.text? = ?_win1.s_tmp;
????????????????PopUpManager.removePopUp(_win1);
????????????}
????????]] >
???? </ mx:Script >
???? < mx:TextInput?x = " 333 " ?y = " 129 " ?id = " p_txt " />
???? < mx:Button?x = " 380 " ?y = " 159 " ?label = " Button " ?click = " showWin1(); " />
????
</ mx:Application >

?

B窗体：

<? xml?version = " 1.0 " ?encoding = " utf-8 " ?>
< mx:TitleWindow?xmlns:mx = " http://www.adobe.com/2006/mxml " ?layout = " absolute " ?width = " 400 " ?height = " 300 " >
???? < mx:Script >
???????? <! [CDATA[
???????????? import ?mx.managers.PopUpManager;
????????????[Bindable]
???????????? public ?var?s_tmp:String;
????????????
???????????? private ?function?click_return(): void {
????????????????s_tmp? = ? this .c_txt.text;???????? // 必须，绑定只是在此值改变的时候在Text中更新，但Text更新时绑定变量的值却不会自动改变
????????????????dispatchEvent( new ?Event( " t1 " ));???? // 手动触发事件
????????????}
????????]] >
???? </ mx:Script >
???? < mx:TextInput?x = " 110 " ?y = " 82 " ?id = " c_txt " ?text = " {s_tmp} " />
???? < mx:Button?x = " 157 " ?y = " 112 " ?label = " Button " ?click = " click_return(); " />
</ mx:TitleWindow >