/**
 * MooFlow - Image gallery
 *
 * Dependencies: MooTools 1.2
 *
 * @version			0.2.1
 *
 * @license			MIT-style license
 * @author			Tobias Wetzel <info [at] outcut.de>
 * @copyright		Author
 * @docmentation	http://outcut.de/MooFlow/Docmentation.html
 */ 

var MooFlow = new Class({

	Implements: [Events, Options],
	
	options: {
		onStart: $empty,
		onClickView: $empty,
		onAutoPlay: $empty,
		onAutoStop: $empty,
		onRequest: $empty,
		onResized: $empty,
		onEmptyinit: $empty,
		reflection: 0.55,
		heightRatio: 0.49,
		offsetY: -80,
		startIndex: 2,
		interval: 3000,
		factor: 190,
		bgColor: '#000',
		useCaption: false,
		useResize: false,
		useSlider: false,
		useWindowResize: false,
		useMouseWheel: false,
		useKeyInput: false,
		useViewer: false
	},
	
	initialize: function(element, options){
		this.MooFlow = element;
		this.setOptions(options);
		this.foc = 300;
		this.factor = this.options.factor;
		this.offY = this.options.offsetY;
		this.isFull = false;
		this.isAutoPlay = false;
		this.isLoading = false;
		this.inMotion = false;
		
		this.MooFlow.addClass('mf').setStyles({
			'overflow':'hidden',
			'background-color':this.options.bgColor,
			'position':'relative',
			'height':this.MooFlow.getSize().x*this.options.heightRatio,
			'opacity':0
		});
		
		if(this.options.useWindowResize) window.addEvent('resize', this.update.bind(this, 'init'));
		//if(this.options.useMouseWheel || this.options.useSlider) this.MooFlow.addEvent('mousewheel', this.wheelTo.bind(this));
		if(this.options.useKeyInput) document.addEvent('keydown', this.keyTo.bind(this));
		
		this.getElements(this.MooFlow);
	},
	
	clearInit: function(){
		this.fireEvent('emptyinit');
	},
	
	getElements: function(el){
		this.master = {'images':[]};
		var els = el.getChildren();
		if(!els.length) {this.clearInit(); return;}
		$$(els).each(function(el){
			var hash = $H(el.getElement('img').getProperties('src','title','alt','longdesc'));
			if(el.get('tag') == 'a') hash.combine(el.getProperties('href','rel','target'));
			this.master['images'].push(hash.getClean());
			el.dispose();
		}, this);
		this.clearMain();
	},
	
	clearMain: function(){
		if(this.cap){this.cap.fade(0);}
		if(this.nav){
			new Fx.Tween(this.nav, {
				'onComplete': function(){
					this.MooFlow.empty();
					this.createAniObj();
				}.bind(this)
			}).start('bottom', -50);
		}
		if(!this.nav && !this.cap){
			this.MooFlow.empty();
			this.createAniObj();
		}
	},
	
	getMooFlowElements: function(key){
		var els = [];
		this.master.images.each(function(el){ 
			els.push(el[key]); 
		});
		return els;
	},
	
	createAniObj: function(){
		this.aniFx = new Fx.Value({
			'transition': Fx.Transitions.Expo.easeOut,
			'link': 'cancel',
			'duration': 750,
			onMotion: this.process.bind(this),
			'onStart': this.flowStart.bind(this),
			'onComplete': this.flowComplete.bind(this)
		});
		this.addLoader();
	},
	
	addLoader: function(){
		this.MooFlow.store('height', this.MooFlow.getSize().y);
		this.loader = new Element('div',{'class':'loader'}).inject(this.MooFlow);
		new Fx.Tween(this.MooFlow, {
			'duration': 800,
			'onComplete': this.preloadImg.bind(this)
		}).start('opacity', 1);
	},
	
	preloadImg: function(){
		this.loadedImages = new Asset.images(this.getMooFlowElements('src'), {
			'onComplete': this.loaded.bind(this),
			'onProgress': this.createMooFlowElement.bind(this)
		});
	},
	
	createMooFlowElement: function(counter, i){
		var obj = this.getCurrent(i);
		var img = this.loadedImages[i];
		obj['width'] = img.width;
		obj['height'] = img.height;
		img.removeProperties('width','height');

		obj['div'] = new Element('div').setStyles({
			'position':'absolute',
			'display':'none',
			'height': this.MooFlow.getSize().y
		}).inject(this.MooFlow);
		obj['con'] = new Element('div').inject(obj['div']);
		img.setStyles({'vertical-align':'bottom', 'width':'100%', 'height':'50%'});
		img.addEvents({'click': this.clickTo.bind(this, i), 'dblclick': this.viewCallBack.bind(this, i)});
		img.inject(obj['con']);
		
		new Element('div').reflect({ 'img': img,
			'ref': this.options.reflection,
			'height': obj.height,
			'width': obj.width,
			'color': this.options.bgColor
		}).setStyles({'width':'100%','height':'50%','background-color': this.options.bgColor}).inject(obj['con']);
		
		this.loader.set('text', (counter+1) + ' / ' + this.loadedImages.length);
	},
	
	loaded: function(){
		this.index = this.options.startIndex;
		this.iL = this.master.images.length-1;
		new Fx.Tween(this.loader, {
			'duration': 800,
			'onComplete': this.createUI.bind(this)
		}).start('opacity', 0);
	},
	
	createUI: function(){
		this.loader.dispose();
		if(this.options.useCaption){
			this.cap = new Element('div').addClass('caption').set('opacity',0).inject(this.MooFlow);
		}	
		this.nav = new Element('div').addClass('mfNav').setStyle('bottom','-50px');
		this.autoPlayCon = new Element('div').addClass('autoPlayCon');
		this.sliderCon = new Element('div').addClass('sliderCon');
		this.resizeCon = new Element('div').addClass('resizeCon');		
		if(this.options.useAutoPlay){
			this.autoPlayCon.adopt(
				new Element('a',{'class':'stop','events': {'click':this.stop.bind(this)}}), 
				new Element('a',{'class':'play','events': {'click':this.play.bind(this)}})
			);
		}
		if(this.options.useSlider){
			this.sliPrev = new Element('a',{'class':'sliderNext','events': {'click':this.prev.bind(this)}});
			this.sliNext = new Element('a',{'class':'sliderPrev','events': {'click':this.next.bind(this)}});
			this.knob = new Element('div',{'class':'knob'});
			this.knob.adopt(new Element('div',{'class':'knobleft'}));
			this.slider = new Element('div',{'class':'slider'}).adopt(this.knob);
			this.sliderCon.adopt(this.sliPrev,this.slider,this.sliNext);
			this.slider.store('parentWidth', this.sliderCon.getSize().x-this.sliPrev.getSize().x-this.sliNext.getSize().x);
		}
		if(this.options.useResize){
			this.resizeCon.adopt(new Element('a',{'class':'resize','events': {'click':this.setScreen.bind(this)}}));
		}		
		this.MooFlow.adopt(this.nav.adopt(this.autoPlayCon, this.sliderCon, this.resizeCon));	
		this.showUI();
	},
	
	showUI: function(){
		if(this.cap) this.cap.fade(1);
		this.nav.tween('bottom', 20);
		this.fireEvent('start');
		this.update();
	},
	
	update: function(e){
		if(e == 'init') return;
		this.oW = this.MooFlow.getSize().x;
		this.sz = this.oW * 0.5;
		if(this.options.useSlider){	
			this.slider.setStyle('width',this.slider.getParent().getSize().x-this.sliPrev.getSize().x-this.sliNext.getSize().x-1);
			this.knob.setStyle('width',(this.slider.getSize().x/this.iL));
			this.sli = new SliderEx(this.slider, this.knob, {steps: this.iL}).set(this.index);
			this.sli.addEvent('onChange', this.glideTo.bind(this));
		}
		this.glideTo(this.index);
		this.isLoading = false;
	},
	
	setScreen: function(){
		if(this.isFull = !this.isFull){
			this.holder = new Element('div').inject(this.MooFlow,'after');
			this.MooFlow.wraps(new Element('div').inject(document.body));
			this.MooFlow.setStyles({'position':'absolute','z-index':'100','top':'0','left':'0','width':window.getSize().x,'height':window.getSize().y});
			if(this.options.useWindowResize){
				this._initResize = this.initResize.bind(this);
				window.addEvent('resize', this._initResize);
			}
		} else {
			this.MooFlow.wraps(this.holder);
			window.removeEvent('resize', this._initResize);
			delete this.holder, this._initResize;
			this.MooFlow.setStyles({'position':'relative','z-index':'','top':'','left':'','width':'','height':this.MooFlow.retrieve('height')});
			this.slider.setStyle('width',this.slider.retrieve('parentWidth'));
		}
		this.fireEvent('resized', this.isFull);
		this.update();
	},
	
	initResize: function(){
		this.MooFlow.setStyles({'width':window.getSize().x,'height':window.getSize().y});
		this.update();
	},
	
	getCurrent: function(index){
		return this.master.images[$chk(index) ? index : this.index];
	},
	
	loadJSON: function(url){
		if(!url || this.isLoading) return;
		this.isLoading = true;
		new Request.JSON({
			'onComplete': function(data){
				if($chk(data)){
					this.master = data;
					this.clearMain();
					this.fireEvent('request', data);
				}
			}.bind(this)
		}, this).get(url);
	},
	
	loadHTML: function(url, filter){
		if(!url || !filter || this.isLoading) return;
		this.isLoading = true;
		new Request.HTML({
			'onSuccess': function(tree, els, htm){
				var result = new Element('div', {'html': htm}).getChildren(filter);
				this.getElements(result);
				this.fireEvent('request', result);
			}.bind(this)
		}, this).get(url);
	},
	
	flowStart: function(){
		this.inMotion = true;
	},
	
	flowComplete: function(){
		this.inMotion = false;
	},
	
	viewCallBack: function(index){
		if(this.index != index || this.inMotion) return;
		var el = $H(this.getCurrent());
		var returnObj = {};
		returnObj['coords'] = el.div.getElement('img').getCoordinates();
		el.each(function(v, k){
			if($type(v) == 'number' || $type(v) == 'string') returnObj[k] = v;
		}, this);
		this.fireEvent('clickView', returnObj);
	},
	prev: function(){
		if(this.index > 0) this.clickTo(this.index-1);
	},
	next: function(){
		if(this.index < this.iL) this.clickTo(this.index+1);
	},
	stop: function(){
		$clear(this.autoPlay);
		this.isAutoPlay = false;
		this.fireEvent('autoStop');
	},
	play: function(){
		this.autoPlay = this.auto.periodical(this.options.interval, this);
		this.isAutoPlay = true;
		this.fireEvent('autoPlay');
	},
	auto: function(){
		if(this.index < this.iL) this.next();
		else if(this.index == this.iL) this.clickTo(0);
	},
	keyTo: function(e){
		switch (e.code){
			case 37: e.stop(); this.prev();	break;
			case 39: e.stop(); this.next();
		}
	},
	wheelTo: function(e){
		if(e.wheel > 0) this.prev();
		if(e.wheel < 0) this.next();
		e.stop().preventDefault();
	},
	clickTo: function(index){
		if(this.index == index) return;
		//this.aniFx.cancel();
		if(this.sli) this.sli.set(index);
		this.glideTo(index);
	},
	glideTo: function(index){
		this.index = index;
		this.aniFx.start(this.aniFx.get(), index*-this.foc);
		if(this.cap) this.cap.set('html', this.getCurrent().title);
	},
	process: function(x){
		var z,W,H,zI=this.iL,foc=this.foc,f=this.factor,sz=this.sz,oW=this.oW,offY=this.offY,div,elh,elw;
		this.master.images.each(function(el){
			div = el.div.style;
			elw = el.width;
			elh = el.height;
			if(x>-foc*6 && x<foc*6){
				with (Math) {
					z = sqrt(10000 + x * x) + 100;
					H = round((elh / elw * f) / z * sz);
					W = round(elw * H / elh);
					if(H >= elw * 0.5) {W = round(f / z * sz);}
					div.left = round(((x / z * sz) + sz) - (f * 0.5) / z * sz) + 'px';
					div.top = round(oW * 0.4 - H) + offY + 'px';
				}	
				el.con.style.height = H*2 + 'px';		
				div.width = W + 'px';
				div.zIndex = x < 0 ? zI++ : zI--;
				div.display = 'block';
			} else {
				div.display = 'none';
			}
			x += foc;
		});
	}
});

var SliderEx = new Class({
	Extends: Slider,
	set: function(step){
		this.step = Math.round(step);
		this.fireEvent('tick', this.toPosition(this.step));
		return this;
    },
	clickedElement: function(event){
		var dir = this.range < 0 ? -1 : 1;
		var position = event.page[this.axis] - this.element.getPosition()[this.axis] - this.half;
		position = position.limit(-this.options.offset, this.full -this.options.offset);
		this.step = Math.round(this.min + dir * this.toStep(position));
		this.checkStep();
		this.fireEvent('tick', position);
	}
});

Fx.Value = new Class({
	Extends: Fx,
	compute: function(from, to, delta){
		this.value = Fx.compute(from, to, delta);
		this.fireEvent('motion', this.value);
		return this.value;
	},
	get: function(){
		return this.value || 0;
	}
});


Element.implement({
	reflect: function(arg){
		var i = arg.img.clone().set('src', arg.img.src); // this works in mootools 1.2.1
		if(Browser.Engine.trident){
			i.style.filter = 'flipv progid:DXImageTransform.Microsoft.Alpha(opacity=20, style=1, finishOpacity=0, startx=0, starty=0, finishx=0, finishy='+100*arg.ref+')';
			i.setStyles({'width':'100%', 'height':'100%'});
			return new Element('div').adopt(i);
		} else {
			var can = new Element('canvas').setProperties({'width':arg.width, 'height':arg.height});
			if(can.getContext){
				var ctx = can.getContext("2d");
				ctx.save();
				ctx.translate(0,arg.height-1);
				ctx.scale(1,-1);
				ctx.drawImage(i, 0, 0, arg.width, arg.height);
				ctx.restore();
				ctx.globalCompositeOperation = "destination-out";
				ctx.fillStyle = arg.color;
				ctx.fillRect(0, arg.height*0.5, arg.width, arg.height);
				var gra = ctx.createLinearGradient(0, 0, 0, arg.height*arg.ref);					
				gra.addColorStop(1, "rgba(255, 255, 255, 1.0)");
				gra.addColorStop(0, "rgba(255, 255, 255, "+(1-arg.ref)+")");
				ctx.fillStyle = gra;
				ctx.rect(0, 0, arg.width, arg.height);
				ctx.fill();
				delete ctx, gra;
			}
			return can;
		}
	}
});

window.addEvent('domready', function(){
	$$('.MooFlowieze').each(function(mooflow){
		new MooFlow(mooflow);
	});
});

http://www.outcut.de/MooFlow/milkbox/milkbox.js

/*
	Milkbox - required: mootools.js v1.2 core + more: Assets
	v1.3
		- feature: hide milkbox links hover default firefox tooltips
		- feature: hide select and textarea tags while playing
		
		
	by Luca Reghellin (http://www.reghellin.com) May 2008, MIT-style license.
	Inspiration from Slimbox by Christophe Beyls (http://www.digitalia.be) 
	and from THE VERY FIRST MAN ON THE MOON: Lokesh Dhakar (http://www.lokeshdhakar.com/projects/lightbox2/)
	AND OF COURSE, SPECIAL THANKS TO THE MOOTOOLS DEVELOPERS
*/

/*

*/

var Milkbox = new Class({

	Implements:Options,
	
	options:{//set all the options here
		overlayOpacity:0.8,
		topPosition:80,
		initialWidth:250,
		initialHeight:250,
		resizeDuration:500,
		resizeTransition:'sine:in:out',/*function (ex. Transitions.Sine.easeIn) or string (ex. 'quint:out')*/
		//hoverBackgroundPosition:'0 -23px',
		autoPlay:false,
		autoPlayDelay:7,
		removeTitle:true
	},
	
	initialize: function(options){
		
		this.setOptions(options);
		this.galleries = [];
		this.currentImage = null;
		this.currentIndex = null;
		this.currentGallery = null;
		
		this.specialDescription = null;//for showThisImage
		this.activated = false;//used in showThisImage 
		
		this.mode = null;//'singleImage','imageGallery','showThisImage'
		this.closed = true;
		this.busy = true;//to control keyboard and autoplay events
		
		this.intObj = null;
		
		this.formtags = null;
		
		this.loadedImages = [];//to check the preloaded images
		
		this.prepareGalleries();
		//if no galleries, stop here and prevent extra memory usage.
		//so you can keep milkbox in every page of a site.
		if(this.galleries.length == 0){ return; };
				
		this.initMilkbox();
		
	},//end init
	
	initMilkbox:function(){

		this.prepareHTML();
		this.prepareEffects();
		this.prepareEvents();
		
		this.activated = true;
		this.formtags = $$('select','textarea');
	},
	
	//runs only 1 time per gallery
	openMilkbox:function(gallery,index){
		if(this.formtags.length != 0){ this.formtags.setStyle('display','none') };

		this.overlay.setStyles({ 'top': -$(window).getScroll().y,'height':$(window).getScrollSize().y+$(window).getScroll().y });
		
		this.center.addClass('mbLoading');
		this.center.setStyle('top',$(window).getScroll().y+this.options.topPosition);

		this.currentGallery = gallery;
		this.currentIndex = index;
		this.overlay.tween('opacity',this.options.overlayOpacity);//onComplete: center.tween opacity
		
		if(gallery.length == 1){
			this.mode = 'singleImage';
			this.loadImages(gallery[index].href);
		} else {
			this.mode = 'imageGallery';
			
			var images = gallery.map(function(item){ return item.href; });

			$$(this.prev, this.next, this.count).setStyles({'display':'block'});
			var border = this.center.getStyle('border-right-width').toInt();//border-right is just ok for design purposes..
			var navWidth = this.prev.getSize().x+this.next.getSize().x+this.close.getSize().x+border;
			this.navigation.setStyle('width',navWidth);
			this.description.setStyle('margin-right',navWidth);
			
			var next = (index != images.length-1) ? images[index+1] : images[0];
			var prev = (index != 0) ? images[index-1] : images[images.length-1];
			var preloads = (prev == next) ? [prev] : [prev,next]; //if gallery.length == 2, then prev == next
						
			this.loadImages(images[index],preloads);
		}
		
		this.closed = false;
	},
	
	//call with js
	showThisImage:function(image,description){
		
		//if init was not done because of the absence of galleries, do it now.
		if(!this.activated){ this.initMilkbox(); }
		
		this.mode = 'showThisImage';
		
		this.specialDescription = description;
		
		this.overlay.setStyles({ 'top': -$(window).getScroll().y,'height':$(window).getScrollSize().y+$(window).getScroll().y });
		
		this.center.addClass('mbLoading');
		this.center.setStyle('top',$(window).getScroll().y+this.options.topPosition);
		
		this.overlay.tween('opacity',this.options.overlayOpacity);//onComplete: center.tween opacity
		this.loadImages(image);
		
		this.closed = false;
	},

 	//see loadImages()
 	showImage:function(image){
 		
 		if(this.closed){ return; };//if you close the Milkbox and an onload event is still running
 		
 		var imageBoxSize = this.image.getSize();
 		
 		this.image.setStyles({'opacity':0, 'width':'', 'height':''});
 		
 		var imageSize = new Hash(image.getProperties('width','height')).map(function(item, index){
			return item.toInt();
		});
 		
 		var centerSize = new Hash(this.center.getStyles('width','height')).map(function(item, index){
 			return item.toInt();
		});
 		
 		var targetSize = {};
 		
 		if(imageSize.width != centerSize.width){ 
 			targetSize.width = imageSize.width;
 			targetSize.marginLeft = -(imageSize.width/2).round();
 		};
 		
 		var gap = (imageBoxSize.y > 0) ? centerSize.height - imageBoxSize.y : 0; 

 		var targetHeight = imageSize.height + gap;

 	   targetSize.height = targetHeight;
 	   
		//so nav doesn't move when you click next/prev
		this.image.setStyles({'width':imageSize.width, 'height':imageSize.height})

 		this.center.removeClass('mbLoading');
 		this.center.morph(targetSize);//onComplete: show all items
 		
 	},
 	
	loadImages:function(currentImage,preloads){
			var loadImage = new Asset.image(currentImage, { onload:function(img){
				this.currentImage = img;
				if(!this.loadedImages.contains(currentImage)){ this.loadedImages.push(currentImage); };//see next/prev events
				$$(this.description,this.navigation).setStyle('visibility','hidden');
				this.navigation.setStyle('height','');//reset the height setted in center.morph.onComplete
				$$(this.next,this.prev,this.close).setStyle('backgroundPosition','0 0');
				this.showImage(this.currentImage);
			}.bindWithEvent(this)});
			
			if(preloads && !this.loadedImages.contains(preloads)){
				var preloadImages = new Asset.images(preloads, { onComplete:function(img){
					preloads.each(function(item){
						if(!(this.loadedImages.contains(item))){ this.loadedImages.push(item); }
					}.bind(this));
				}.bindWithEvent(this)});
			};
			
	},
	
	//all the main events
	prepareEvents:function(){
	
		//galleries
		this.galleries.each(function(gallery){
			$$(gallery).addEvent('click',function(e){
				var button=($(e.target).match('a')) ? $(e.target) : $(e.target).getParent('a');
				e.preventDefault();
				
				if(this.options.autoPlay){
					this.autoPlay({ gallery:gallery, index:gallery.indexOf(button) });
				}
				
				else{ this.openMilkbox(gallery, gallery.indexOf(button)); }
				
			}.bindWithEvent(this));
		},this);
		
		//next, prev, see next_prev_aux()
		this.next.addEvent('click',this.next_prev_aux.bindWithEvent(this,'next'));
		this.prev.addEvent('click',this.next_prev_aux.bindWithEvent(this,'prev'));
		
		//keyboard next/prev/close
		$(window.document).addEvent('keydown',function(e){
			if(this.mode != 'imageGallery' || this.busy == true){ return; };
			if(e.key == 'right' || e.key == 'space'){ this.next_prev_aux(e,'next'); }
			else if(e.key == 'left'){ this.next_prev_aux(e,'prev'); }
			else if(e.key == 'esc'){ this.closeMilkbox(); };
		}.bindWithEvent(this));
		
		
		//css hover doesn't work in ie6, so I must do it via js...
		$$(this.next,this.prev,this.close).addEvents({
				'mouseover':function(e){ 
					var button=($(e.target).match('a')) ? $(e.target) : $(e.target).getParent('a');
					button.setStyle('backgroundPosition',this.options.hoverBackgroundPosition); 
				}.bindWithEvent(this),
				'mouseout':function(){ this.setStyle('backgroundPosition','0 0'); }
		});

		//overlay
		this.overlay.get('tween').addEvent('onComplete',function(){
			if(this.overlay.getStyle('opacity') == this.options.overlayOpacity){ 
				this.center.tween('opacity',1);
			} else if(this.overlay.getStyle('opacity') == 0) {
				this.overlay.setStyles({'height':'','top':''});
			};
		}.bindWithEvent(this));
		
		//center
		this.center.get('morph').addEvent('onComplete',function(){
			
 			 this.image.grab(this.currentImage);
			 this.image.tween('opacity',1);
			 			 
			 var d = (!(this.mode == 'showThisImage')) ? this.currentGallery[this.currentIndex].retrieve('title') : this.specialDescription;
			 if($chk(d)){ this.description.innerHTML = d; };
			 
			 if(this.mode == 'imageGallery'){ 
			 	this.count.appendText((this.currentIndex+1)+' of '+this.currentGallery.length); 
			 }
			 
			 var currentCenterHeight = this.center.getStyle('height').toInt();
			 
			 this.navigation.setStyle('height',this.bottom.getStyle('height').toInt());//to have the right-border height == total bottom height
			 var bottomSize = this.bottom.getSize().y;
			 
			 //after the 1st time, currentCenterHeight is always > this.image.getSize().y
			 var targetOffset = (currentCenterHeight > this.image.getSize().y) ? (this.bottom.getSize().y+this.image.getSize().y)-currentCenterHeight : bottomSize;
				
			 this.bottom.setStyle('display','none');//to avoid rendering problems during setFinalHeight

			 this.center.retrieve('setFinalHeight').start(currentCenterHeight,currentCenterHeight+targetOffset);
			/**/
		}.bindWithEvent(this));
		
		this.center.retrieve('setFinalHeight').addEvent('onComplete',function(){
			
			this.bottom.setStyles({'visibility':'visible','display':'block'});
			$$(this.description,this.navigation).setStyle('visibility','visible');
			//reset overlay height based on position and height
			var scrollSize = $(window).getScrollSize().y;
			var scrollTop = $(window).getScroll().y;
			
			this.overlay.setStyle('height',scrollSize+scrollTop);
			this.busy = false;
			
		}.bindWithEvent(this));
		
		//reset overlay height and position onResize
		window.addEvent('resize',function(){
			if(this.overlay.getStyle('opacity') == 0){ return; };//resize only if visible
			var scrollSize = $(window).getScrollSize().y;
			var scrollTop = $(window).getScroll().y;
			this.overlay.setStyles({ 'height':scrollSize+scrollTop,'top':-scrollTop });
		}.bindWithEvent(this))

		//close
		$$(this.overlay,this.image,this.close).addEvent('click',function(){ this.closeMilkbox(); }.bindWithEvent(this));
		
	},
	
	next_prev_aux:function(e,direction){
		
		if(e){ 
			e.preventDefault();
			if(this.intObj){ $clear(this.intObj); this.intObj = null; };
		} //if there's no event obj, than this is called by autoPlay()
		
		else{ if(this.busy){ return; } }//stop autoplay()
		
		this.busy = true; //for keyboard and autoplay
		
		var backupIndex = this.currentIndex;
		
		if(direction == "next"){
			var i= (this.currentIndex != this.currentGallery.length-1) ? this.currentIndex += 1 : this.currentIndex = 0;
			var _i= (this.currentIndex != this.currentGallery.length-1) ? this.currentIndex + 1 : 0;
		} else {
			var i= (this.currentIndex != 0) ? this.currentIndex -= 1 : this.currentIndex = this.currentGallery.length-1;
			var _i= (this.currentIndex != 0) ? this.currentIndex - 1 : this.currentGallery.length-1;		
		};
		
		this.image.empty();
		this.description.empty();
		this.count.empty();
		
		if(!this.loadedImages.contains(this.currentGallery[i].href)){ 
			this.center.addClass('mbLoading');
		};
		this.loadImages(this.currentGallery[i].href,[this.currentGallery[_i].href]);
	},
	
	autoPlay:function(obj){//obj: gallery, index, delay (in seconds)
		
		var g = (obj && obj.gallery && ($type(obj.gallery) == 'array')) ? obj.gallery : Milkbox.galleries[0];
		var i = (obj && obj.index && ($type(obj.index) == 'number')) ? obj.index : 0;
		var d = (obj && obj.delay && ($type(obj.delay) == 'number')) ? obj.delay*1000 : this.options.autoPlayDelay*1000;
		if(d < this.options.resizeDuration*2){ d = this.options.resizeDuration*2 };
		
		Milkbox.openMilkbox(g,i);
		if(this.mode != 'imageGallery'){ return; };
		this.intObj = this.next_prev_aux.periodical(d,this,[null,'next']);
		
	},
	
	closeMilkbox:function(){
		this.cancelAllEffects();
		if(this.intObj){ $clear(this.intObj); };
		
		this.currentImage = null;
		this.currentIndex = null;
		this.currentGallery = null;
 		
		$$(this.prev, this.next, this.count).setStyle('display','none');
		var border = this.center.getStyle('border-right-width').toInt();
		var navWidth = this.close.getSize().x+border;
		this.navigation.setStyles({'width':navWidth,'height':'','visibility':'hidden'});
		this.description.setStyle('margin-right',navWidth);
		this.description.empty();
		this.bottom.setStyles({'visibility':'hidden','display':''});
		
   	this.image.setStyles({'opacity':0, 'width':'', 'height':''});
 		this.image.empty();
 		
 		this.count.empty();
		
		this.center.setStyles({'opacity':0,'width':this.options.initialWidth,'height':this.options.initialHeight,'marginLeft':-(this.options.initialWidth/2)});
		this.overlay.tween('opacity',0);//see onComplete in prepareEvents() 
		
		if(this.formtags.length != 0){ this.formtags.setStyle('display','inline') };
		
		this.mode = null;
		this.closed = true;
	},
	
	cancelAllEffects:function(){
		this.overlay.get('tween').cancel();
		this.center.get('morph').cancel();
		this.center.get('tween').cancel();
		this.center.retrieve('setFinalHeight').cancel();
		this.image.get('tween').cancel();
	},
	
	prepareEffects:function(){
		this.overlay.set('tween',{ duration:'short',link:'cancel' });
		this.center.set('tween',{ duration:'short',link:'chain' });
		this.center.set('morph',{ duration:this.options.resizeDuration,link:'chain',transition:this.options.resizeTransition });
		this.center.store('setFinalHeight',new Fx.Tween(this.center,{property:'height',duration:'short'}));
		this.image.set('tween',{ link:'chain' });
	},
	
	prepareGalleries:function(){
		var families = [];
		var milkbox_a = [];
		
		$$('a').each(function(a){
			//test 'milkbox' and link extension, and collect all milkbox links
			if(a.rel && a.rel.test(/^milkbox/i) && a.href.test(/\.(gif|jpg|png)$/i)){
				if(a.rel.length>7 && !families.contains(a.rel)){ families.push(a.rel); };
				milkbox_a.push(a);
			}
		},this);

		//console.log(milkbox_a)
		
		//create an array of arrays with all galleries
		milkbox_a.each(function(a){
			$(a).store('href',a.href);
			$(a).store('rel',a.rel);
			$(a).store('title',a.title);
			if(this.options.removeTitle){ $(a).removeProperty('title'); }
			if(a.rel.length > 7){
				families.each(function(f,i){
					if(a.rel == f){
						if(!this.galleries[i]){ this.galleries[i] = [] };
						this.galleries[i].push($(a));
					};
				},this);
			} else { this.galleries.push([$(a)]); };
		},this);
		
		//console.log(this.galleries)
	},
		
	prepareHTML:function(){		
		
		this.overlay = new Element('div', { 'id':'mbOverlay','styles':{ 'opacity':'0','visibility':'visible' }}).inject($(document.body));
		
		this.center = new Element('div', {'id':'mbCenter', 'styles':{'width':this.options.initialWidth,'height':this.options.initialHeight,'marginLeft':-(this.options.initialWidth/2),'opacity':0}}).inject($(document.body));
		this.image = new Element('div', {'id':'mbImage'}).inject(this.center);
		
		this.bottom = new Element('div',{'id':'mbBottom'}).inject(this.center).setStyle('visibility','hidden');
		this.navigation = new Element('div',{'id':'mbNavigation'}).setStyle('visibility','hidden');
		this.description = new Element('div',{'id':'mbDescription'}).setStyle('visibility','hidden');

		this.bottom.adopt(this.navigation, this.description, new Element('div',{'class':'clear'}));
		
		this.close = new Element('a',{'id':'mbCloseLink'});
		this.next = new Element('a',{'id':'mbNextLink'});
		this.prev = new Element('a',{'id':'mbPrevLink'});
		this.count = new Element('span',{'id':'mbCount'});
		
		$$(this.next, this.prev, this.count).setStyle('display','none');
		
		this.navigation.adopt(this.close, this.next, this.prev,new Element('div',{'class':'clear'}), this.count);

	}
	
});//END MILKBOX;

window.addEvent('domready', function(){ 
	Milkbox = new Milkbox();
});