//** Simple Controls Gallery- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com
//** Dec 7th, 08'- Script created
//** 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

//** May 16th, 11'- Updated to v 1.4: Adds ability to show image gallery only after all images within gallery has been loaded. Requires jQuery 1.5+
//** Bryian Tan modified (v1.3) and created a .NET control based in imple Controls Gallery and then Osmar Medina add propiertes to .Net Control and customized this
//** OMD version

var simpleGallery_navpanel={
    loadinggif: './SlideShowControl/img-nav/ajax-loading.gif', //full path or URL to loading gif image - omd test pending
    //panel: {height:'30px', opacity:0.35, paddingTop:'10px', fontStyle:'bold 9px Verdana'}, //customize nav panel container : original values height:'45px', fontStyle: 'bold 11px Verdana'
    panel: { opacity: 0.35, paddingTop: '10px', fontStyle: 'bold 9px Verdana' }, //customize nav panel container : original values height:'45px', fontStyle: 'bold 11px Verdana'
	//images: [ 'left.gif', 'play.gif', 'right.gif', 'pause.gif'], //nav panel images (in that order)     //commented out, BT
	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
	
	// hide the panel by setting the height =0, BT
	//var panelHeight = simpleGallery_navpanel.panel.height;
	var panelHeight = setting.navpanelheight

    if (setting.showpanel === 'false') {
        panelHeight = "0px";
    }
	
	setting.panelheight=(parseInt(setting.navpanelheight)>5)? parseInt(setting.navpanelheight) : parseInt(panelHeight) // 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.preloadfirst=(!jQuery.Deferred)? false : (typeof setting.preloadfirst!="undefined")? setting.preloadfirst : true //Boolean on whether to preload all images before showing gallery - new line 1.4
	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, loadedimages=0
	var dfd = (setting.preloadfirst)? jQuery.Deferred() : {resolve:function(){}, done:function(f){f()}} //create real deferred object unless preloadfirst setting is false or browser doesn't support it - new line 1.4
	setting.longestdesc="" //get longest description of all slides. If no desciptions defined, variable contains ""
	setting.$loadinggif=(function(){ //preload and ref ajax loading gif - new 1.4
		var loadgif=new Image()
		loadgif.src=simpleGallery_navpanel.loadinggif
		return jQuery(loadgif).css({verticalAlign:'middle'}).wrap('<div style="position:absolute;text-align:center;width:100%;height:100%" />').parent()
	})()
	for (var i=0; i<setting.imagearray.length; i++){  //preload slideshow images
		preloadimages[i]=new Image()
		preloadimages[i].src=setting.imagearray[i][0]
		if (setting.imagearray[i][3] && setting.imagearray[i][3].length>setting.longestdesc.length)
			setting.longestdesc=setting.imagearray[i][3]
		jQuery(preloadimages[i]).bind('load error', function(){
			loadedimages++
			if (loadedimages==setting.imagearray.length){
				dfd.resolve() //indicate all images have been loaded
			}
		})
	}
	var slideshow=this
	jQuery(document).ready(function($){
		var setting=slideshow.setting
		setting.$wrapperdiv = $('#' + setting.wrapperid).css({ position: 'relative', visibility: 'visible', background: 'silver', overflow: 'hidden', width: setting.dimensions[0], height: setting.dimensions[1] }).empty() //main gallery DIV  background:'black'
		if (setting.$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.$wrapperdiv)
		setting.$loadinggif.css({top:setting.dimensions[1]/2-32}).appendTo(setting.$wrapperdiv) //30 is assumed height of ajax loading gif - omd use 32px
		setting.gallerylayers=setting.$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){
				$(this).css({opacity:(e.type=="mouseover")? 1 : 0.8})
			})
			.bind('click', function(e){
				var keyword=e.target.title.toLowerCase()
				slideshow.navigate(keyword) //assign behavior to nav images
			})
		dfd.done(function(){ //execute when all images have loaded
			setting.$loadinggif.remove()
			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
			})
		}) //end deferred code
	}) //end jQuery domload
}

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
				//alert(this.setting.navimages[1]);
				$playbutton.attr({ title: 'Play', src: this.setting.navimages[1] }) //omd 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: this.setting.navimages[3] }) //omd 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' })
			
			//hide desc text
			setting.descdiv.innerHTML = setting.imagearray[imgindex][3]
			/*if (setting.showpanel === 'false') { // this if is not more in 1.4
                setting.$descpanel.css({ visibility: 'hidden' })
            }*/ 
		}
		else if (setting.longestdesc != "") { //if at least one slide contains a description (feature is enabled)
			setting.descdiv.innerHTML = null
			setting.$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 = {

	//add alternate text
	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" />' // original 1.4
		//layerHTML += '<img title="' + imgelement[3] + '" alt="' + imgelement[3] + '"  src="' + imgelement[0] + '" style="border-width:0" />' original 1.3
		layerHTML += '<img title="" alt="' + imgelement[3] + '"  src="' + imgelement[0] + '" style="border-width:0" />'
		layerHTML += (imgelement[1]) ? '</a>' : ''
		return layerHTML //return HTML for this layer
	},

	addnavpanel: function(setting) {
		var interfaceHTML = ''
		var myTop = simpleGallery_navpanel.imageSpacing.offsetTop[i];
		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) ? setting.navimages[(setting.ispaused) ? 1 : 3] : setting.navimages[i]  //omd 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="position:absolute; top:-2px; right:0px; width:50px; margin-top:10px">' + (setting.curimage + 1) + '/' + setting.imagearray.length + '</div>' // top:-2px; no habia margin-top:5px ori 1.4: //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)
		$('<div class="navpanelbg"></div><div class="navpanelfg"></div>') //create inner nav panel DIVs
			.css({ position: 'absolute', left: 0, top: 0, width: '100%', height: '100%'}) // 1.3 dice 90%
			.eq(0).css({ background: setting.navpanelcolor, opacity: simpleGallery_navpanel.panel.opacity }).end() //"navpanelbg" div background: 'black'  #A10048
			.eq(1).css({ paddingTop: simpleGallery_navpanel.panel.paddingTop, textAlign: 'center', color: 'white' }).html(interfaceHTML).end() //"navpanelfg" div
			.appendTo(setting.$navpanel)
		return setting.$navpanel.find('img.navimages, div.gallerystatus').get() //return 4 nav related images and DIVs as DOM objects
	},
	//description
	adddescpanel: function(setting) {
		setting.$descpanel = $('<div class="gallerydesc" ><div class="gallerydescbg"></div><div class="gallerydescfg"><div class="gallerydesctext"></div></div></div>')
			.css({ position: 'absolute', width: '100%', left: 0, top: -1000, zIndex: '1001' })
			.find('div').css({ position: 'absolute', left: 0, top: 0, width: '100%', height: '25px' }) // no habia height: '20px' -- font: simpleGallery_navpanel.panel.fontStyle como q aplica doble
			.eq(0).css({ background: setting.navpanelcolor, opacity: simpleGallery_navpanel.panel.opacity }).end() //"gallerydescbg" div background: 'white'
			.eq(1).css({ paddingTop: simpleGallery_navpanel.panel.paddingTop, color: 'white' }).end() //"gallerydescfg" div -- 1.4 y 1.3 no habia paddingTop:
			.eq(2).html(setting.longestdesc).end().end()
			.appendTo(setting.$wrapperdiv)
			
		var $gallerydesctext = setting.$descpanel.find('div.gallerydesctext')
		
		//hide des panel
		setting.descpanelheight = $gallerydesctext.outerHeight()
		/*if (setting.showpanel === 'false') {	// No habia en 1.4
            setting.$descpanel.css({ visibility: 'hidden' })
        }*/
		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=/"
	}
}