ScrollRectPlugin.as
2.59 KB
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/**
* VERSION: 1.02
* DATE: 10/2/2009
* ACTIONSCRIPT VERSION: 3.0
* UPDATES AND DOCUMENTATION AT: http://www.TweenMax.com
**/
package com.greensock.plugins {
import flash.display.*;
import flash.geom.Rectangle;
import com.greensock.*;
/**
* Tweens the scrollRect property of a DisplayObject. You can define any (or all) of the following
* properties:
* <code>
* <ul>
* <li> x : Number</li>
* <li> y : Number</li>
* <li> width : Number</li>
* <li> height : Number</li>
* <li> top : Number</li>
* <li> bottom : Number</li>
* <li> left : Number</li>
* <li> right : Number</li>
* </ul>
* </code><br />
*
* <b>USAGE:</b><br /><br />
* <code>
* import com.greensock.TweenLite; <br />
* import com.greensock.plugins.TweenPlugin; <br />
* import com.greensock.plugins.ScrollRectPlugin; <br />
* TweenPlugin.activate([ScrollRectPlugin]); //activation is permanent in the SWF, so this line only needs to be run once.<br /><br />
*
* TweenLite.to(mc, 1, {scrollRect:{x:50, y:300, width:100, height:100}}); <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 ScrollRectPlugin 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 **/
protected var _target:DisplayObject;
/** @private **/
protected var _rect:Rectangle;
/** @private **/
public function ScrollRectPlugin() {
super();
this.propName = "scrollRect";
this.overwriteProps = ["scrollRect"];
}
/** @private **/
override public function onInitTween(target:Object, value:*, tween:TweenLite):Boolean {
if (!(target is DisplayObject)) {
return false;
}
_target = target as DisplayObject;
if (_target.scrollRect != null) {
_rect = _target.scrollRect;
} else {
var r:Rectangle = _target.getBounds(_target);
_rect = new Rectangle(0, 0, r.width + r.x, r.height + r.y);
}
for (var p:String in value) {
addTween(_rect, p, _rect[p], value[p], p);
}
return true;
}
/** @private **/
override public function set changeFactor(n:Number):void {
updateTweens(n);
_target.scrollRect = _rect;
}
}
}