/**
 * RokNewsFlash - A flash news rotator with prev/next implementation and ability to play/stop.
 *                autostops when mouseovering and autoplay when mouseleaving
 * 
 * @version		1.0
 * 
 * @license		MIT-style license
 * @author		Djamil Legato <djamil [at] djamil.it>
 * @client		Andy Miller @ Rockettheme
 * @copyright	Author
 */

var RokNewsFlash=new Class({
	options:{
		controls:true,
		delay:2000,
		duration:800,
		blankimage:'/images/blank.png'
	},
	initialize:function(b,c){
		this.setOptions(c);
		this.element=$(b)||null;
		this.element.addEvents({
			'mouseenter':this.stop.bind(this),
			'mouseleave':this.play.bind(this)
		});
		this.news=this.element.getElements('ul li');
		this.current=0;
		this.fx=[];
		this.news.getParent().setStyle('position','relative');
		var d=this;
		this.news.each(function(a,i){
			a.setStyle('position','absolute');
			this.fx[i]=new Fx.Style(a,'opacity',{
				duration:this.options.duration,
				onStart:function(){d.transitioning=true},
				onComplete:function(){d.transitioning=false}
			}).set(1);
			if(!i)return;
			a.setStyle('opacity',0)
		},this);
		if(this.options.controls)this.addControls();
		this.status='stop';
		window.addEvent('domready',this.play.bind(this));
		return this
	},
	addControls:function(){
		var a=new Element('div',{'class':'controls'}).injectTop(this.element);
		this.arrowPrev=new Element('img',{'class':'control-prev','title':'Previous','alt':'prev','src':this.options.blankimage}).inject(a);
		this.arrowNext=new Element('img',{'class':'control-next','title':'Next','alt':'next','src':this.options.blankimage}).inject(a);
		this.arrowPrev.addEvent('click',this.previous.bind(this));
		this.arrowNext.addEvent('click',this.next.bind(this));
		return this
	},
	previous:function(){
		if(this.transitioning)return this;
		var a=(!this.current)?this.news.length-1:this.current-1;
		this.fx[this.current].start(0).chain(function() {
			this.fx[a].start(1);
		}.bind(this));
		this.current=a;
		return this
	},
	next:function(){
		if(this.transitioning)return this;
		var a=(this.current==this.news.length-1)?0:this.current+1;
		this.fx[this.current].start(0).chain(function(){
			this.fx[a].start(1);
			}.bind(this));
		this.current=a;
		return this
	},
	play:function(){
		if(this.status=='play')return this;
		this.status='play';
		this.timer=this.next.periodical(this.options.delay+this.options.duration,this);
		return this
	},
	stop:function(){
		this.status='stop';
		$clear(this.timer);
		return this
	}
});
RokNewsFlash.implement(new Options,new Events);