package com.dstrict.ub.utils.transitions{
 
 import flash.display.DisplayObject;
 import flash.events.*;
 import flash.utils.Dictionary;
 /**
  DisplayObject tween class
  트윈을 적용할 속성의 갯수에 관계없이 일괄적으로 적용가능
  마지막 parameter 로 정해진 형식의 이벤트 오브젝트 적용시 이벤트 시작과 끝을 tracking 할 수 있음. 
 
  @example code
  <code>
 
   function onTweenStart(param):void{
    trace("onTweenStart----&gt;"+param);
   }
 
   function onTweenFinish(param):void{
    trace("onTweenFinish----&gt;"+param);
   }
 
TweenEngine.start(circle,{x:400},Regular.easeOut,30,{onStart:onTweenStart,
onStartParams:["circle"],onFinish:onTweenFinish,onFinishParams:["circle"]});
 </code>
 
 */
 
 public class TweenEngine {
   private static var _referContainer : Dictionary=new Dictionary(true);
  /**
   @param targetObj : DisplayObject , tween 적용할 오브젝트
   @param tweenProperty : Object , 속성오브젝트 ex. {x:100,y:100,alpha:1}
   @param easing : Function , 이징함수
   @param duration : int , 지속프레임
   @param rest : Obejct , [optional]  event object
   ex. {onStart:onTweenStart,onStartParams:[],onFinish:onTweenFinish,onFinishParams:[]}
  */
  public static function start(targetObj:*,tweenProperty:Object,easing:Function,duration:int,...rest):void{
   var time:int=1;
   var beginning:Array=new Array();
   var change:Array=new Array();
   var isCreated : Boolean=false;
   var displayObj : DisplayObject;
 
   TweenEngine.stop(targetObj);
 
   if(!(targetObj is DisplayObject)){
      displayObj = new Shape();
      isCreated=true;
    }else{
      displayObj = targetObj;
     }
 
   for(var i:* in tweenProperty){
       beginning.push(targetObj[i]);
       change.push(tweenProperty[i]-targetObj[i]);
   }
 
   if(rest.length &amp;&amp; rest[0].onStart){
    var eventStartObject:Object=new Object();
    eventStartObject.onStart=rest[0].onStart;
    eventStartObject.onStartParams=rest[0].onStartParams;
 
    //onStart event
    eventStartObject.onStart.apply(eventStartObject,eventStartObject.onStartParams);
   }
 
   //Nested function
   var update:Function=function(){
    var objIdx:int=0;
      for(var i:* in tweenProperty){
       targetObj[i]=easing(time,beginning[objIdx],change[objIdx],duration);
       objIdx++;
      }
      time++;
      if(time&gt;duration){
      delete _referContainer[displayObj];
       displayObj.removeEventListener(Event.ENTER_FRAME,update);
       if(isCreated) displayObj=null;
 
       if(rest.length &amp;&amp; rest[0].onFinish){
        var eventFinishObject:Object=new Object();
        eventFinishObject.onFinish=rest[0].onFinish;
        eventFinishObject.onFinishParams=rest[0].onFinishParams;
 
        //onFinish event
        eventFinishObject.onFinish.apply(eventFinishObject,eventFinishObject.onFinishParams);
       }
     }
   }
     _referContainer[displayObj] = update;
      displayObj.addEventListener(Event.ENTER_FRAME,update);
  }
 
  //Update 2007.10.30
  /**
   * Pause a tweening for a given object.
   */
  public static function  pause(targetObj : *) : void {
   if(targetObj.hasEventListener(Event.ENTER_FRAME)) {
    targetObj.removeEventListener(Event.ENTER_FRAME, _referContainer[targetObj]);
   }
  }
 
  /**
   * Pause all tweenings on the engine.
   */
 public static function pauseAll() : void {
   for(var item:* in _referContainer) {
    if(item.hasEventListener(Event.ENTER_FRAME)) {
     item.removeEventListener(Event.ENTER_FRAME, _referContainer[item]);
    }
   }
  }
 
  /**
   * Resume a tweening from a given object.
   */
  public static function resume(targetObj : *) : void {
   if(_referContainer[targetObj] != null) {
    targetObj.addEventListener(Event.ENTER_FRAME, _referContainer[targetObj]);
   }
  }
 
  /**
   * Resume all tweenings on the engine.
   */
  public static function resumeAll() : void {
   for(var item:* in _referContainer) {
    if(_referContainer[item] != null) {
     item.addEventListener(Event.ENTER_FRAME, _referContainer[item]);
    }
   }
  }
 
  /**
   *  Stop a tweening for a given object
   */
  public static function stop(targetObj : *) : void {
   if(targetObj.hasEventListener(Event.ENTER_FRAME)) {
    targetObj.removeEventListener(Event.ENTER_FRAME, _referContainer[targetObj]);
    delete _referContainer[targetObj];
   }
  }
 
  /**
   * Remove all tweenings from the engine.
   */
  public static function stopAll() : void {
   for(var item:* in _referContainer) {
    if(item.hasEventListener(Event.ENTER_FRAME)) {
     item.removeEventListener(Event.ENTER_FRAME, _referContainer[item]);
     delete _referContainer[item];
    }
   }
  }
 
 }
}
 
import com.dstrict.ub.utils.transitions.*;
import fl.motion.easing.*;
 
TweenEngine.start(circle,{x:400,y:300},Cubic.easeInOut,20,{onStart:onTweenStart,onStartParams:["circle start"],
onFinish:onTweenFinish,onFinishParams:["circle finish"]});
 
//----&gt; 마지막 오브젝트 값은 이벤트 핸들러를 참조하는 값으로 옵션사항이다.
            단, 사용시 이벤트 오브젝에서 함수이름을 onStart , onFinish 로
            이벤트 파라미터를 onStartParams,onFinishParams 로 키값을 사용해야만 한다.
 
 function onTweenStart(param):void{
   trace("onTweenStart----&gt;"+param);
}
 
function onTweenFinish(param):void{
  trace("onTweenFinish----&gt;"+param);
}
 
//stop tween
stage.addEventListener(MouseEvent.CLICK,onStop);
function onStop(evt:MouseEvent){
 TweenEngine.stop(circle);
}