//** DD Drop Down Panel- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com
//** Dec 7th, 08'- Script created (Requires jquery 1.2.x)

var simpleGallery_navpanel={
	panel: {height:'100px', opacity:0.7, paddingTop:'20px', fontStyle:'bold 11px Verdana'}, //customize nav panel container
	images: [ 'images/gallerycontrols/left.png', 'images/gallerycontrols/play.png', 'images/gallerycontrols/right.png', 'images/gallerycontrols/pause.png'], //nav panel images (in that order)
	imageSpacing: {offsetTop:[-4, 0, -4], spacing:20}, //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
	settingarg=null
	var setting=this.setting
	setting.pause=parseInt(setting.pause)
	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 //ispaused reflects current state of gallery, autoplay indicates whether gallery is set to auto play
	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=[] //temp array to preload images
	for (var i=0; i<setting.imagearray.length; i++){
		preloadimages[i]=new Image()
		preloadimages[i].src=setting.imagearray[i][0]
	}
	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
		$(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() //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")
							slideshow.setting[k][i].innerHTML=null
						slideshow.setting[k][i]=null
					}
				}
				slideshow.setting[k]=null
			})
			slideshow=slideshow.setting=null
		})
	})
}

simpleGallery.prototype={

	navigate:function(keyword){
		clearTimeout(this.setting.playtimer)
		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=false
				$playbutton.attr({title:'Play', src:simpleGallery_navpanel.images[1]})
			}
			else if (this.setting.ispaused){ //if play Gallery
				this.setting.autoplay=true
				this.setting.playtimer=setTimeout(function(){slideshow.showslide('next')}, this.setting.pause)
				$playbutton.attr({title:'Pause', src:simpleGallery_navpanel.images[3]})
			}
			slideshow.setting.ispaused=!slideshow.setting.ispaused
		}
	},

	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.bglayer].innerHTML=null  //empty bglayer (previously fglayer before setting.fglayer=setting.bglayer was set below)
				try{
					setting.onslide(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)
				}
				if (setting.autoplay){
					setting.playtimer=setTimeout(function(){slideshow.showslide('next')}, setting.pause)
				}
			})
		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
		setting.navbuttons[3].innerHTML=(setting.curimage+1) + '/' + setting.imagearray.length
	},

	showhidenavpanel:function(state){
		var setting=this.setting
		var endpoint=(state=="show")? setting.dimensions[1]-parseInt(simpleGallery_navpanel.panel.height) : this.setting.dimensions[1]
		setting.$navpanel.stop().animate({top:endpoint}, simpleGallery_navpanel.slideduration)
	}
}

simpleGallery.routines={

	getSlideHTML:function(imgelement){
		var layerHTML=(imgelement[1])? '<a href="'+imgelement[1]+'" target="'+imgelement[2]+'">\n' : '' //hyperlink slide?
		layerHTML+='<img src="'+imgelement[0]+'" style="border-width:0" />'
		layerHTML+=(imgelement[1])? '</a>' : ''
		return layerHTML //return HTML for this layer
	},

	addnavpanel:function(setting){
		var interfaceHTML=''
		for (var i=0; i<3; i++){
			var imgstyle='position:relative; border:0; cursor:hand; cursor:pointer; top:'+simpleGallery_navpanel.imageSpacing.offsetTop[i]+'px; margin-right:'+(i!=2? simpleGallery_navpanel.imageSpacing.spacing+'px' : 0)
			var title=(i==0? 'Prev' : (i==1)? (setting.ispaused? 'Play' : 'Pause') : 'Next')
			var imagesrc=(i==1)? simpleGallery_navpanel.images[(setting.ispaused)? 1 : 3] : simpleGallery_navpanel.images[i]
			interfaceHTML+='<img class="navimages" title="' + title + '" src="'+ imagesrc +'" style="'+imgstyle+'" /> '
		}
		interfaceHTML+='<div class="gallerystatus" style="margin-top:1px">' + (setting.curimage+1) + '/' + setting.imagearray.length + '</div>'
		setting.$navpanel=$('<div class="navpanellayer"></div>')
			.css({position:'absolute', width:'100%', height:simpleGallery_navpanel.panel.height, left:0, top:setting.dimensions[1], font:simpleGallery_navpanel.panel.fontStyle, zIndex:'1001'})
			.appendTo(setting.$wrapperdiv)
		$('<div class="navpanellayerbg"></div><div class="navpanellayerfg"></div>')
			.css({position:'absolute', left:0, top:0, width:'100%', height:'100%'})
			.eq(0).css({background:'#001144', opacity:simpleGallery_navpanel.panel.opacity}) //"navpanellayerbg" div
			.end().eq(1).css({paddingTop:simpleGallery_navpanel.panel.paddingTop, textAlign:'center', color:'white'}).html(interfaceHTML) //"navpanellayerfg" div
			.end().appendTo(setting.$navpanel)
		return setting.$navpanel.find('img.navimages, div.gallerystatus').get() ////return 4 nav buttons DIVs as DOM objects
	},

	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=/"
	}
}