Flex从弹出窗口中取回值(转，不过这个有点意思)

//应用程序窗口 Main.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">

    <mx:Script>
        <![CDATA[
            import flash.events.Event;
           
            import mx.managers.PopUpManager;
          
            public var popUp:TestTitleWindow;
  
            public function displayForm():void {
                // Array with data for the custom control ComboBox control.
                var doctypes:Array = ["*.as", "*.mxml", "*.swc"]
              
                // Create the pop-up and cast the return value of the createPopUp()
                // Method to the ArrayEntryForm custom component.
                popUp =TestTitleWindow(PopUpManager.createPopUp(this, TestTitleWindow, true));
                
                // Set TitleWindow properties.
                popUp.title="Select File Type";
                popUp.showCloseButton=true;
  
                // Set the event listeners for the ArrayEntryForm component.
                popUp.addEventListener("close", removeMe);
                popUp["cancelButton"].addEventListener("click", removeMe);  
                popUp["okButton"].addEventListener("click", submitData);  
  
                // Set properties of the ArrayEntryForm custom control.
                popUp.myArray = doctypes;
                PopUpManager.centerPopUp(popUp);
            }
          
            // OK button click event listener.
            // Sets the target component in the application to the
            // selected ComboBox item value.
            private function submitData(event:Event):void {
                ti1.text = String(popUp.cb1.selectedItem);
                //removeMe();
                PopUpManager.removePopUp(popUp);
            }

            // Cancel button click event listener.
            private function removeMe(event:Event):void {
                PopUpManager.removePopUp(popUp);
            }          
        ]]>
    </mx:Script>

    <mx:VBox>
        <mx:TextInput id="ti1" text=""/>
    </mx:VBox>
    <mx:Button id="btnSelect" label="Select File Type" click="displayForm();"/>
</mx:Application>

//弹出窗口 TestTitleWindow.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:TitleWindow xmlns:mx="http://www.adobe.com/2006/mxml"
        showCloseButton="true" width="410" borderAlpha="1" height="260">

    <mx:Script>
        <![CDATA[
            import mx.managers.PopUpManager;
          
            // Variables whose values are set by the main application.
            // Data provider array for the components ComboBox control.
            [Bindable]
            public var myArray:Array;

        ]]>
    </mx:Script>

    <mx:ComboBox id="cb1" dataProvider="{myArray}" width="124"/>
    <mx:HBox height="22">
        <mx:Button id="okButton" label="OK"/>
        <mx:Button id="cancelButton" label="Cancel"/>
    </mx:HBox>
</mx:TitleWindow>