/*
Slideshow.js
	a class for creating an simple image slideshow - documentation available at <http://projects.adamnfish.com/slideshow>

Author:
	adamnfish: see http://projects.adamnfish.com for more scripts and utilities
	Copyright 2007 Adam Fisher, <http://www.adamnfish.com>, MIT Style Licence

Licence:
	MIT style
*/

var Slideshow=new Class({Implements:[Events,Options],options:{displayDuration:15,transitionDuration:2000,nextChoice:'random',onTransitionStart:Class.empty,onTransitionEnd:Class.empty},initialize:function(el,paths,options){this.setOptions(options);this.current=$(el);this.rubbishBin=new Element('div');this.imgs=this.options.nextChoice=='randomOrder'?paths.shuffle():paths;this.count=0;this.styles=this.current.style.cssText;this.attrs=this.current.getProperties('id','class','alt','title','width','height');this.start();},start:function(){this.timer=this.change.bind(this).delay(this.options.displayDuration*1000);this.loaded=this.waiting=0;var nextKey=this.options.nextChoice=='random'?$random(0,this.imgs.length):this.count;this.next=new Asset.image(this.imgs[nextKey%this.imgs.length],{onload:function(){this.next.setProperties(this.attrs);this.next.style.cssText=this.styles;this.loaded=1;if(this.waiting){this.change();}}.bind(this)});this.count+=1;},stop:function(){this.timer=$clear(this.timer);},change:function(){if(this.loaded){this.transition=new Fx.Morph(this.current,{duration:this.options.transitionDuration,onComplete:function(){this.next.setStyle('z-index','2');this.current.destroy();this.current=this.next;this.start();this.fireEvent('onTransitionEnd',10);}.bind(this)});this.next.setStyle('z-index',1);this.next.injectAfter(this.current);this.transition.start({'opacity':[1,0]});this.fireEvent('onTransitionStart',10);}else{this.waiting=1;}}});Array.implement({shuffle:function(){for(var i=1,j=this.length;i<j;i++){var nextKey=$random(0,j-i);this.push(this[nextKey]);this.splice(nextKey,1);}
return this;}});