//** Simple Controls Gallery- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com
//** Dec 7th, 08'- Script created (Requires jquery 1.2.x)
//** February 6th, 09'- Updated to v 1.3:
	//1) Adds Description Panel to optionally show a textual description for each slide
	//2) In Auto Play mode, you can now set the number of cycles before gallery stops.
	//3) Inside oninit() and onslide(), keyword "this" now references the current gallery instance


var simpleGallery_navpanel={
	panel: {height:'45px', opacity:0.5, paddingTop:'5px', fontStyle:'bold 11px Verdana'}, //customize nav panel container
	images: [ 'left.gif', 'play.gif', 'right.gif', 'pause.gif'], //nav panel images (in that order)
	imageSpacing: {offsetTop:[-4, 0, -4], spacing:10}, //top offset of left, play, and right images, PLUS spacing between the 3 images
	slideduration: 500 //duration of slide up animation to reveal panel
}

function simpleGallery(settingarg){
	this.setting=settingarg
	this.setting.slideshow = this
	settingarg=null
	var setting=this.setting
	setting.panelheight=(parseInt(setting.navpanelheight)>5)? parseInt(setting.navpanelheight) : parseInt(simpleGallery_navpanel.panel.height)
	setting.fadeduration=parseInt(setting.fadeduration)
	setting.curimage=(setting.persist)? simpleGallery.routines.getCookie("gallery-"+setting.wrapperid) : 0
	setting.curimage=setting.curimage || 0 //account for curimage being null if cookie is empty
	setting.ispaused=!setting.autoplay[0] //ispaused reflects current state of gallery, autoplay[0] indicates whether gallery is set to auto play
	setting.currentstep=0 //keep track of # of slides slideshow has gone through
	setting.totalsteps=setting.imagearray.length*setting.autoplay[2] //Total steps limit: # of images x # of user specified cycles
	setting.fglayer=0, setting.bglayer=1 //index of active and background layer (switches after each change of slide)
	setting.oninit=setting.oninit || function(){}
	setting.onslide=setting.onslide || function(){}
	var preloadimages=[], longestdesc=null //preload images
	setting.longestdesc="" //get longest description of all slides. If no desciptions defined, variable contains ""
	for (var i=0; i<setting.imagearray.length; i++){
		preloadimages[i]=new Image()
		if(!setting.imagearray[i])
			document.title = setting.wrapperid;
		preloadimages[i].src=setting.imagearray[i][0]
		if (setting.imagearray[i][3] && setting.imagearray[i][3].length>setting.longestdesc.length)
			setting.longestdesc=setting.imagearray[i][3]
	}

	
	this.preloadimages = preloadimages;
	
	var slideshow=this
	jQuery(document).ready(function($){
		var setting=slideshow.setting
		setting.$wrapperdiv=$('#'+setting.wrapperid).css({position:'relative', visibility:'visible', background:'white', overflow:'hidden', width:setting.dimensions[0], height:setting.dimensions[1]}).empty() //main gallery DIV
		if (setting.$wrapperdiv.length==0){ //if no wrapper DIV found
			alert("Error: DIV with ID \""+setting.wrapperid+"\" not found on page.")
			return
		}
		setting.$gallerylayers=$('<div class="gallerylayer"></div><div class="gallerylayer"></div>') //two stacked DIVs to display the actual slide 
			.css({position:'absolute', left:0, top:0})
			.appendTo(setting.$wrapperdiv)
		setting.gallerylayers=setting.$gallerylayers.get() //cache stacked DIVs as DOM objects
		setting.navbuttons=simpleGallery.routines.addnavpanel(setting) //get 4 nav buttons DIVs as DOM objects
			
		if(setting.imagearray.length == 1) {
			setting.$leftNav.hide();
			setting.$rightNav.hide();
		}
		
		
		if (setting.longestdesc!="") //if at least one slide contains a description (feature is enabled)
			setting.descdiv=simpleGallery.routines.adddescpanel(setting)
		$(setting.navbuttons).filter('img.navimages').css({opacity:0.8})
			.bind('mouseover mouseout', function(e){
				$(this).css({opacity:(e.type=="mouseover")? 1 : 0.8})
			})
			.bind('click', function(e){
				var keyword=e.target.title.toLowerCase()
				slideshow.navigate(keyword) //assign behavior to nav images
			})
		setting.$wrapperdiv.bind('mouseenter', function(){slideshow.showhidenavpanel('show')})
		setting.$wrapperdiv.bind('mouseleave', function(){slideshow.showhidenavpanel('hide')})
		slideshow.showslide(setting.curimage) //show initial slide
		setting.oninit.call(slideshow) //trigger oninit() event
		$(window).bind('unload', function(){ //clean up and persist
			$(slideshow.setting.navbuttons).unbind()
			if (slideshow.setting.persist) //remember last shown image's index
				simpleGallery.routines.setCookie("gallery-"+setting.wrapperid, setting.curimage)
			jQuery.each(slideshow.setting, function(k){
				if (slideshow.setting[k] instanceof Array){
					for (var i=0; i<slideshow.setting[k].length; i++){
						if (slideshow.setting[k][i].tagName=="DIV") //catches 2 gallerylayer divs, gallerystatus div
							slideshow.setting[k][i].innerHTML=null
						slideshow.setting[k][i]=null
					}
				}
				/*if (slideshow.setting[k].innerHTML) //catch gallerydesctext div
					slideshow.setting[k].innerHTML=null
				slideshow.setting[k]=null*/
			})
			slideshow=slideshow.setting=null
		})
	})
}

simpleGallery.prototype={

	navigate:function(keyword){
		clearTimeout(this.setting.playtimer)
		this.setting.totalsteps=100000 //if any of the nav buttons are clicked on, set totalsteps limit to an "unreachable" number 
		if (!isNaN(parseInt(keyword))){
			this.showslide(parseInt(keyword))
		}
		else if (/(prev)|(next)/i.test(keyword)){
			this.showslide(keyword.toLowerCase())
		}
		else{ //if play|pause button
			var slideshow=this
			var $playbutton=$(this.setting.navbuttons).eq(1)
			if (!this.setting.ispaused){ //if pause Gallery
				this.setting.autoplay[0]=false
				$playbutton.attr({title:'Play', src:simpleGallery_navpanel.images[1]})
			}
			else if (this.setting.ispaused){ //if play Gallery
				this.setting.autoplay[0]=true
				this.setting.playtimer=setTimeout(function(){slideshow.showslide('next')}, this.setting.autoplay[1])
				$playbutton.attr({title:'Pause', src:simpleGallery_navpanel.images[3]})
			}
			slideshow.setting.ispaused=!slideshow.setting.ispaused
		}
	},
	
	
	preShowSlide:function(keyword) {
		var slideshow=this
		var setting=slideshow.setting
		var totalimages=setting.imagearray.length
		var imgindex=(keyword=="next")? (setting.curimage<totalimages-1? setting.curimage+1 : 0)
			: (keyword=="prev")? (setting.curimage>0? setting.curimage-1 : totalimages-1)
			: Math.min(keyword, totalimages-1)
		
		var wrapper = $('#'+setting.wrapperid);
		var nextImg = slideshow.preloadimages[imgindex];
		
		setting.$gallerylayers.eq(setting.fglayer).animate({opacity: 0}, "normal", function() {
		
			if(wrapper.width() != nextImg.width || wrapper.height() != nextImg.height) {
				$('#'+setting.wrapperid).animate({width: slideshow.preloadimages[imgindex].width+"px"}).animate({height: slideshow.preloadimages[imgindex].height+"px"}, "normal", function() {
					slideshow.showslide(keyword);
				});
			}
			else {
				slideshow.showslide(keyword);
			}
		});
	},
	
	showslide:function(keyword){
		var slideshow=this
		var setting=slideshow.setting
		var totalimages=setting.imagearray.length
		var imgindex=(keyword=="next")? (setting.curimage<totalimages-1? setting.curimage+1 : 0)
			: (keyword=="prev")? (setting.curimage>0? setting.curimage-1 : totalimages-1)
			: Math.min(keyword, totalimages-1)
		setting.gallerylayers[setting.bglayer].innerHTML=simpleGallery.routines.getSlideHTML(setting.imagearray[imgindex])
		setting.$gallerylayers.eq(setting.bglayer).css({zIndex:1000, opacity:0}) //background layer becomes foreground
			.stop().css({opacity:0}).animate({opacity:1}, setting.fadeduration, function(){ //Callback function after fade animation is complete:
				clearTimeout(setting.playtimer)
				$(setting.gallerylayers[setting.fglayer]).css('filter', '');
				setting.gallerylayers[setting.bglayer].innerHTML=null  //empty bglayer (previously fglayer before setting.fglayer=setting.bglayer was set below)
				try{
					setting.onslide.call(slideshow, setting.gallerylayers[setting.fglayer], setting.curimage)
				}catch(e){
					alert("Simple Controls Gallery: An error has occured somwhere in your code attached to the \"onslide\" event: "+e)
				}
				setting.currentstep+=1
				if (setting.autoplay[0]){
					if (setting.currentstep<=setting.totalsteps)
						setting.playtimer=setTimeout(function(){slideshow.showslide('next')}, setting.autoplay[1])
					else
						slideshow.navigate("play/pause")
				}
			}) //end callback function
		setting.gallerylayers[setting.fglayer].style.zIndex=999 //foreground layer becomes background
		setting.fglayer=setting.bglayer
		setting.bglayer=(setting.bglayer==0)? 1 : 0
		setting.curimage=imgindex
		if (setting.imagearray[imgindex][3]){ //if this slide contains a description
			//setting.$descpanel.css({visibility:'visible'})
			setting.descdiv.innerHTML=setting.imagearray[imgindex][3]
		}
		else if (setting.longestdesc!=""){ //if at least one slide contains a description (feature is enabled)
			setting.descdiv.innerHTML=""
			//setting.$descpanel.css({visibility:'hidden'})

		}
		if (setting.imagearray[imgindex][1].length) {
		/*	$(setting.gallerylayers[setting.fglayer]).children().eq(0).fancybox({itemCurrent: imgindex, itemArray: slideshow.generateFancyboxData(imgindex)}); */
		}
	},
	
	generateFancyboxData: function(index) {
	var slideshow=this
		var setting=slideshow.setting
		var data = [];
		var i = 0;
		var length = setting.imagearray.length;
		while(i<length) {
			data.push({href: setting.imagearray[i][1]});
			i++;
		}
		return data;
	},

	showhidenavpanel:function(state){
	},

	showhidedescpanel:function(state){
		var setting=this.setting
		var endpoint=(state=="show")? 0 : -setting.descpanelheight
		setting.$descpanel.stop().animate({top:endpoint}, simpleGallery_navpanel.slideduration)
	}
}

simpleGallery.routines={

	getSlideHTML:function(imgelement){
		var layerHTML=(imgelement[1])? '<div>\n' : '' //hyperlink slide?
		layerHTML+='<img src="'+imgelement[0]+'" style="border-width:0" />'
		layerHTML+=(imgelement[1])? '</div>' : ''
		return layerHTML //return HTML for this layer
	},

	addnavpanel:function(setting){
		var interfaceHTML='';
		var slideshow = setting.slideshow;

		setting.$leftNav=$('<div class="leftNav"></div>')
			.css({position:'absolute', width:setting.navBarWidth+'px', height:'100%', left:0, top:0, font:simpleGallery_navpanel.panel.fontStyle, zIndex:'1001'})
			.appendTo(setting.$wrapperdiv)
		
		
		function mouseEnterHandler() {
			if(!jQuery.browser.msie) {
				$(this).css({opacity: 1}).parent().children().eq(0).stop().css({opacity: 1});
			}
			else {
				$(this).parent().children().eq(0).stop().css({opacity: 1});
			}
		}
		
		function mouseLeaveHandler() {
			if(!jQuery.browser.msie) {
				$(this).css({opacity: 0.5}).parent().children().eq(0).stop().css({opacity: 0});
			}
			else {
				$(this).parent().children().eq(0).stop().css({opacity: 0});
			}
		}
				
		$('<div class="navpanelbg"></div><div class="navpanelfg"><img src="'+setting.images[0]+'" width="'+setting.imageSize[0]+'" height="'+setting.imageSize[1]+'" alt=""  /></div>') //create inner nav panel DIVs
			.css({position:'absolute', left:0, top:0, width:'100%', height:'100%'}).click(function() { slideshow.showslide("prev"); })
			.eq(0).css({ opacity:0,  backgroundColor: setting.navBarColor}).end() //"navpanelbg" div
			.eq(1).css({ textAlign: 'center'}).children().eq(0).css({marginTop: (setting.dimensions[1]/2-(setting.imageSize[1]/2))+"px"}).end().end().end() //"navpanelfg" div
			.appendTo(setting.$leftNav)
			.eq(1).mouseenter(mouseEnterHandler)
			.mouseleave(mouseLeaveHandler)

		
		setting.$rightNav=$('<div class="rightNav"></div>')
			.css({position:'absolute', width:setting.navBarWidth+'px', height:'100%', left:(setting.dimensions[0]-setting.navBarWidth)+"px", top:0, font:simpleGallery_navpanel.panel.fontStyle, zIndex:'1001'})
			.appendTo(setting.$wrapperdiv)

		$('<div class="navpanelbg"></div><div class="navpanelfg"><img src="'+setting.images[1]+'" width="'+setting.imageSize[0]+'" height="'+setting.imageSize[1]+'" alt="" /></div>') //create inner nav panel DIVs
			.css({position:'absolute', left:0, top:0, width:'100%', height:'100%'}).click(function() { slideshow.showslide("next"); })
			.eq(0).css({ opacity:0,  backgroundColor: setting.navBarColor}).end() //"navpanelbg" div
			.eq(1).css({ textAlign: 'center'}).children().eq(0).css({marginTop: (setting.dimensions[1]/2-(setting.imageSize[1]/2))+"px"}).end().end().end() //"navpanelfg" div
			.appendTo(setting.$rightNav)
			.eq(1).mouseenter(mouseEnterHandler)
			.mouseleave(mouseLeaveHandler)
			
		if(!jQuery.browser.msie) {
			setting.$leftNav.children().eq(1).css({ opacity: 0.5})
			setting.$rightNav.children().eq(1).css({ opacity: 0.5})
		}
			
			
			
			
		/*$('<div class="navEnable"></div>')
			.css({width: setting.dimensions[0]/2, height: '100%', cursor: 'default'})
			.mouseenter(function() { $(this).parent().children().eq(0).css({opacity: 1}).end().eq(1).css({opacity: 1}); })
			.mouseleave(function() { $(this).parent().children().eq(0).css({opacity: 0}).end().eq(1).css({opacity: 0.5}); })
			.click(function() { $(this).parent().parent().children().eq(1).children().eq(0).click(); })
			.appendTo(setting.$leftNav);
			
		$('<div class="navEnable"></div>')
			.css({width: (setting.dimensions[0]/2-setting.navBarWidth)+'px', height: '100%', position: 'absolute', cursor: 'default', left: '-'+(setting.dimensions[0]/2-setting.navBarWidth)+'px'})
			.mouseenter(function() { $(this).parent().children().eq(0).css({opacity: 1}).end().eq(1).css({opacity: 1}); })
			.mouseleave(function() { $(this).parent().children().eq(0).css({opacity: 0}).end().eq(1).css({opacity: 0.5}); })
			.appendTo(setting.$rightNav);*/
			
	},
	
	
	
	

	adddescpanel:function(setting){
		descWrap = $('#'+setting.descWrap);
		//descWrap.css({width: setting.dimensions[0]});
		return descWrap.get(0)
		
	},

	getCookie:function(Name){ 
		var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair
		if (document.cookie.match(re)) //if cookie found
			return document.cookie.match(re)[0].split("=")[1] //return its value
		return null
	},

	setCookie:function(name, value){
		document.cookie = name+"=" + value + ";path=/"
	}
}