커스텀 프로퍼티

MyTextInput.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:TextInput xmlns:mx="http://www.adobe.com/2006/mxml" initialize="strBackup=''">
 <mx:Script>
  <![CDATA[
   public var strBackup : String;
   
   public function backup() : void
   {
    strBackup = this.text
   }
   
   public function rollback() : void
   {
    this.text = strBackup;
   }
  ]]>
 </mx:Script>
</mx:TextInput>

Study.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
 xmlns:nsl="*">
 <mx:Button x="197" y="144" label="Rollback" click="myText.rollback()" />
 <mx:Button x="197" y="114" label="Backup" click="myText.backup()" width="74"/>
 <nsl:MyTextInput x="154" y="84" id="myText" />
</mx:Application>