//** 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:'23px', opacity:0.5, paddingTop:'2px', fontStyle:'bold 11px Verdana'}, //customize nav panel container
	images: [ '/Images/left.gif', '/Images/play.gif', '/Images/right.gif', '/Images/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
	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()
		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]
	}
	var slideshow=this
	jQuery(document).ready(function($){
		var setting=slideshow.setting
		setting.$wrapperdiv=$('#'+setting.wrapperid).css({position:'relative', visibility:'visible', background:'black', overflow:'hidden', width:setting.dimensions[0], height:setting.dimensions[1]}).empty() //main gallery DIV
		if (setting.$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.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
			$(slideshow.setting.navbuttons).unbind()
			if (slideshow.setting.persist) //remember last shown image's index
				simpleGallery.routines.setCookie("gallery-"+setting.wrapperid, setting.curimage)
			jQuery.each(slideshow.setting, function(k){
				if (slideshow.setting[k] instanceof Array){
					for (var i=0; i<slideshow.setting[k].length; i++){
						if (slideshow.setting[k][i].tagName=="DIV") //catches 2 gallerylayer divs, gallerystatus div
							slideshow.setting[k][i].innerHTML=null
						slideshow.setting[k][i]=null
					}
				}
				if (slideshow.setting[k].innerHTML) //catch gallerydesctext div
					slideshow.setting[k].innerHTML=null
				slideshow.setting[k]=null
			})
			slideshow=slideshow.setting=null
		})
	})
}
(function($) {
    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
            }
        },

        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.$gallerylayers.eq(setting.bglayer).css({ zIndex: 1000, opacity: 0 }) //background layer becomes foreground
			.stop().css({ opacity: 0 }).animate({ opacity: 1 }, setting.fadeduration, function () { //Callback function after fade animation is complete:
			    clearTimeout(setting.playtimer)
			    setting.gallerylayers[setting.bglayer].innerHTML = null  //empty bglayer (previously fglayer before setting.fglayer=setting.bglayer was set below)
			    try {
			        setting.onslide.call(slideshow, setting.gallerylayers[setting.fglayer], setting.curimage)
			    } catch (e) {
			        alert("Simple Controls Gallery: An error has occured somwhere in your code attached to the \"onslide\" event: " + e)
			    }
			    setting.currentstep += 1
			    if (setting.autoplay[0]) {
			        if (setting.currentstep <= setting.totalsteps)
			            setting.playtimer = setTimeout(function () { slideshow.showslide('next') }, setting.autoplay[1])
			        else
			            slideshow.navigate("play/pause")
			    }
			}) //end callback function
            setting.gallerylayers[setting.fglayer].style.zIndex = 999 //foreground layer becomes background
            setting.fglayer = setting.bglayer
            setting.bglayer = (setting.bglayer == 0) ? 1 : 0
            setting.curimage = imgindex
            setting.navbuttons[3].innerHTML = (setting.curimage + 1) + '/' + setting.imagearray.length
            if (setting.imagearray[imgindex][3]) { //if this slide contains a description
                setting.$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 = null
                setting.$descpanel.css({ visibility: 'hidden' })

            }
        },

        showhidenavpanel: function (state) {
            var setting = this.setting
            var endpoint = (state == "show") ? setting.dimensions[1] - setting.panelheight : this.setting.dimensions[1]
            setting.$navpanel.stop().animate({ top: endpoint }, simpleGallery_navpanel.slideduration)
            if (setting.longestdesc != "") //if at least one slide contains a description (feature is enabled)
                this.showhidedescpanel(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]) ? '<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 = $('<div class="navpanellayer"></div>')
			.css({ position: 'absolute', width: '100%', height: setting.panelheight, left: 0, top: setting.dimensions[1], font: simpleGallery_navpanel.panel.fontStyle, zIndex: '1001' })
			.appendTo(setting.$wrapperdiv)
            $('<div class="navpanelbg"></div><div class="navpanelfg"></div>') //create inner nav panel DIVs
			.css({ position: 'absolute', left: 0, top: 0, width: '100%', height: '100%' })
			.eq(0).css({ background: 'white', opacity: simpleGallery_navpanel.panel.opacity }).end() //"navpanelbg" div
			.eq(1).css({ paddingTop: simpleGallery_navpanel.panel.paddingTop, textAlign: 'center', color: 'black' }).html(interfaceHTML).end() //"navpanelfg" div
			.appendTo(setting.$navpanel)
            return setting.$navpanel.find('img.navimages, div.gallerystatus').get() //return 4 nav related images and DIVs as DOM objects
        },

        adddescpanel: function (setting) {
            setting.$descpanel = $('<div class="gallerydesc"><div class="gallerydescbg"></div><div class="gallerydescfg"><div class="gallerydesctext"></div></div></div>')
			.css({ position: 'absolute', width: '100%', left: 0, top: -1000, zIndex: '1001' })
			.find('div').css({ position: 'absolute', left: 0, top: 0, width: '100%' })
			.eq(0).css({ background: 'white', opacity: simpleGallery_navpanel.panel.opacity }).end() //"gallerydescbg" div
			.eq(1).css({ color: '#572502' }).end() //"gallerydescfg" div
			.eq(2).html(setting.longestdesc).end().end()
			.appendTo(setting.$wrapperdiv)
            var $gallerydesctext = setting.$descpanel.find('div.gallerydesctext')
            setting.descpanelheight = $gallerydesctext.outerHeight()
            setting.$descpanel.css({ top: -setting.descpanelheight, height: setting.descpanelheight }).find('div').css({ height: '100%' })
            return setting.$descpanel.find('div.gallerydesctext').get(0) //return gallery description DIV as a DOM object
        },

        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=/"
        }
    }
})(jQuery.noConflict());