flex4 TiltleWindow

<?xml version="1.0" encoding="utf-8"?>
<mx:TitleWindow 
	xmlns:mx="http://www.adobe.com/2006/mxml" 
	layout="absolute" width="400" height="300"
	close="close()" showCloseButton="true">
	<mx:Script>
		<![CDATA[
			import mx.managers.PopUpManager;
			[Bindable]
			public var myPopUpvar:Array = new Array();
			public var logs:String = "";
			private function close():void
			{
				PopUpManager.removePopUp(this);    
			}
			private function sendMessage():void
			{
				var outgoingEvent:Event = new Event("pop",false);
				logs = labelPosition.selectedItem.toString();
				dispatchEvent(outgoingEvent);
				close();
			}
			public function setData(str:Array):void
			{
				myPopUpvar = str;
			}
		]]>
	</mx:Script>
	
	<mx:Form cornerRadius="5" indicatorGap="5" paddingBottom="5" 
			 paddingLeft="5" paddingRight="5" paddingTop="5" id="basicPropertyPane" width="100%" >
		<mx:Label text="Label Properties" fontStyle="italic" width="100%" fontWeight="bold"/>
		<mx:FormItem label="Name:">
			<mx:TextInput width="90%" id="labelName"/>
		</mx:FormItem>
		<mx:FormItem label="Color:">
			<mx:ColorPicker id="labelColor"/>
		</mx:FormItem>
		<mx:FormItem id="locationForm" label="Location(X,Y):">
			<mx:NumericStepper minimum="0" maximum="1000" id="locationX" />
			<mx:NumericStepper minimum="0" maximum="1000" id="locationY"/>
		</mx:FormItem>
		<mx:FormItem label="Position:">
			<mx:ComboBox id="labelPosition" dataProvider="{myPopUpvar}" />
		</mx:FormItem>
		<mx:FormItem label="Offset(X,Y):">
			<mx:NumericStepper minimum="-200" maximum="200" id="labelOffsetX" />
			<mx:NumericStepper minimum="-200" maximum="200" id="labelOffsetY"/>
		</mx:FormItem>
		<mx:Button label="send" right="10" bottom="10" click="sendMessage()"/>
	</mx:Form>
</mx:TitleWindow>

mxml代码

public var firstwindow:Firstwindow = new Firstwindow();
			public var linetwindow:LineRender = new LineRender();
			//使用组件对象打开弹出式窗口的最大好处是可以重用组件并保持所以的状态值.
			private function createWindow(e:MouseEvent):void
			{
				firstwindow.addEventListener("pop",getwindowData);
				PopUpManager.addPopUp(firstwindow,this,false);
				PopUpManager.centerPopUp(firstwindow);
				//windowInnerStartDragging(e);
				
				
			}
			private function getwindowData(e:Event):void
			{
				//createNodeforward(e);
				
			}