/**
Script: Slideshow.Fold.js
	Slideshow.Fold - Flash extension for Slideshow.

License:
	MIT-style license.

Copyright:
	Copyright (c) 2008 [Aeron Glemann](http://www.electricprism.com/aeron/).

Dependencies:
	Slideshow.
*/
Slideshow.Fold=new Class({Extends:Slideshow,initialize:function(el,data,options){this.parent(el,data,options)},_show:function(fast){if(!this.image.retrieve("tween")){var options=(this.options.overlap)?{duration:this.options.duration}:{duration:this.options.duration/2};$$(this.a,this.b).set("tween",$merge(options,{link:"chain",onStart:this._start.bind(this),onComplete:this._complete.bind(this),property:"clip",transition:this.options.transition}))}var rect=this._rect(this.image);var img=(this.counter%2)?this.a:this.b;if(fast){img.get("tween").cancel().set("rect(0, 0, 0, 0)");this.image.get("tween").cancel().set("rect(auto, auto, auto, auto)")}else{if(this.options.overlap){img.get("tween").set("rect(auto, auto, auto, auto)");var tween=this.image.get("tween").set(rect.top+" "+rect.left+" "+Math.ceil(rect.bottom/2)+" "+rect.left).start(rect.top+" "+rect.right+" "+Math.ceil(rect.bottom/2)+" "+rect.left).start(rect.top+" "+rect.right+" "+rect.bottom+" "+rect.left)}else{var fn=function(rect){this.image.get("tween").set(rect.top+" "+rect.left+" "+Math.ceil(rect.bottom/2)+" "+rect.left).start(rect.top+" "+rect.right+" "+Math.ceil(rect.bottom/2)+" "+rect.left).start(rect.top+" "+rect.right+" "+rect.bottom+" "+rect.left)}.pass(rect,this);var rect=this._rect(img);img.get("tween").set(rect.top+" "+rect.right+" "+rect.bottom+" "+rect.left).start(rect.top+" "+rect.right+" "+Math.ceil(rect.bottom/2)+" "+rect.left).start(rect.top+" "+rect.left+" "+Math.ceil(rect.bottom/2)+" "+rect.left).chain(fn)}}},_rect:function(img){var rect=img.getCoordinates(this.slideshow.retrieve("images"));rect.right=(rect.right>this.width)?this.width-rect.left:rect.width;rect.bottom=(rect.bottom>this.height)?this.height-rect.top:rect.height;rect.top=(rect.top<0)?Math.abs(rect.top):0;rect.left=(rect.left<0)?Math.abs(rect.left):0;return rect}});