/**
 * VERSION: 1.04
 * DATE: 10/2/2009
 * ACTIONSCRIPT VERSION: 3.0 
 * UPDATES AND DOCUMENTATION AT: http://www.TweenMax.com
 **/
package com.greensock.plugins {
    import flash.display.*;
    import com.greensock.*;
/**
 * Some components require resizing with setSize() instead of standard tweens of width/height in
 * order to scale properly. The SetSizePlugin accommodates this easily. You can define the width, 
 * height, or both. <br /><br />
 * 
 * <b>USAGE:</b><br /><br />
 * <code>
 *         import com.greensock.TweenLite; <br />
 *         import com.greensock.plugins.TweenPlugin; <br />
 *         import com.greensock.plugins.SetSizePlugin; <br />
 *         TweenPlugin.activate([SetSizePlugin]); //activation is permanent in the SWF, so this line only needs to be run once.<br /><br />
 * 
 *         TweenLite.to(myComponent, 1, {setSize:{width:200, height:30}}); <br /><br />
 * </code>
 * 
 * <b>Copyright 2010, GreenSock. All rights reserved.</b> This work is subject to the terms in <a href="http://www.greensock.com/terms_of_use.html">http://www.greensock.com/terms_of_use.html</a> or for corporate Club GreenSock members, the software agreement that was issued with the corporate membership.
 * 
 * @author Jack Doyle, jack@greensock.com
 */
    public class SetSizePlugin extends TweenPlugin {
        /** @private **/
        public static const API:Number = 1.0; //If the API/Framework for plugins changes in the future, this number helps determine compatibility
        
        /** @private **/
        public var width:Number;
        /** @private **/
        public var height:Number;
        
        /** @private **/
        protected var _target:Object;
        /** @private **/
        protected var _setWidth:Boolean;
        /** @private **/
        protected var _setHeight:Boolean;
        /** @private **/
        protected var _hasSetSize:Boolean;
        
        /** @private **/
        public function SetSizePlugin() {
            super();
            this.propName = "setSize";
            this.overwriteProps = ["setSize","setActualSize","width","height","scaleX","scaleY"];
            this.round = true;
        }
        
        /** @private **/
        override public function onInitTween(target:Object, value:*, tween:TweenLite):Boolean {
            _target = target;
            _hasSetSize = Boolean("setSize" in _target);
            if ("width" in value && _target.width != value.width) {
                addTween((_hasSetSize) ? this : _target, "width", _target.width, value.width, "width");
                _setWidth = _hasSetSize;
            }
            if ("height" in value && _target.height != value.height) {
                addTween((_hasSetSize) ? this : _target, "height", _target.height, value.height, "height");
                _setHeight = _hasSetSize;
            }
            if (_tweens.length == 0) {
                _hasSetSize = false; //protects from situations where the start and end values are the same, thus we're not really tweening anything.
            }
            return true;
        }
        
        /** @private **/
        override public function killProps(lookup:Object):void {
            super.killProps(lookup);
            if (_tweens.length == 0 || "setSize" in lookup) {
                this.overwriteProps = [];
            }
        }
        
        /** @private **/
        override public function set changeFactor(n:Number):void {
            updateTweens(n);
            if (_hasSetSize) {
                _target.setSize((_setWidth) ? this.width : _target.width, (_setHeight) ? this.height : _target.height);
            }
        }

    }
}