as3自定义事件

package EventPackage
{
    import flash.events.Event;
    
    /**
     * 
     * @author tqr <br />
     * 创建时间：2015-2-6 下午5:55:49
     */
    public class MyEvent extends Event
    {
        private var _data:*;
        
        public function get data():*{
            return _data;
        }
        
        public function MyEvent(type:String, $data:*, bubbles:Boolean=false, cancelable:Boolean=false)
        {
            super(type, bubbles, cancelable);
            this._data = $data;
        }
        
        public override function clone():Event{
            return new MyEvent(this.type, this._data, this.bubbles, this.cancelable);
        }
    }
}