Flex コンポーネントの破棄 注意点

/**
 * Copyright matsu ( http://wonderfl.net/user/matsu )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/qjmQ
 */

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" creationComplete="init(event);">
	<mx:Script>
		<![CDATA[
			private function init(evt:Event):void
			{
				removeButton.addEventListener(MouseEvent.CLICK,removeButtonClick);
				
				bButton.addEventListener(MouseEvent.CLICK,aButtonClick);
				cButton.addEventListener(MouseEvent.CLICK,aButtonClick);
			}
	
			private function removeButtonClick(evt:Event):void
			{
				// aButton は、インラインで追加したイベントハンドラなので、removeEventListener() メソッドを呼び出すことはできない
				aButton.removeEventListener(MouseEvent.CLICK,aButtonClick);
				bButton.removeEventListener(MouseEvent.CLICK,aButtonClick);
				cButton.removeEventListener(MouseEvent.CLICK,aButtonClick);
				
				/*
				myBox.removeChild(aButton);
				myBox.removeChild(bButton);
				myBox.removeChild(cButton);
				*/
			}
			
			private function aButtonClick(evt:Event):void {
				logTextArea.text += "click!\n";
			}
		]]>
	</mx:Script>

	<mx:Panel>
		<mx:Box id="myBox" direction="vertical" height="100" width="125">
			<mx:Button id="aButton" label="A" click="aButtonClick(event)"/>
			<mx:Button id="bButton" label="B"/>
			<mx:Button id="cButton" label="C"/>
		</mx:Box>
	</mx:Panel>
	
	<mx:Button id="removeButton" label="Remove ButtonEvent"/>
	
	<mx:TextArea id="logTextArea" width="125" height="100"/>

</mx:Application>