//** 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:'64px', opacity:1, paddingTop:'5px', fontStyle:'bold 11px Verdana', background: 'url(/contentblob/2078/slideshow_gradient/data.png ) top left repeat-x'}, //customize nav panel container
images: [ '/contentblob/2086/slideshow_left/data.png', '/contentblob/2082/slideshow_play/data.png', '/contentblob/2084/slideshow_right/data.png', '/contentblob/2080/slideshow_pause/data.png'], //nav panel images (in that order)
imageSpacing: {offsetTop:[0, 0, 0], spacing:0}, //top offset of left, play, and right images, PLUS spacing between the 3 images
slideduration: 400 //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)
	$(setting.navbuttons).filter('img.navimages').css({overflow: 'auto'})
	.bind('mouseover mouseout', function(e){
		//$(this).css({opacity:(e.type=="mouseover")? 1 : 1})
	})
	.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])
		$playbutton.attr({title:'Pause', src:simpleGallery_navpanel.images[3]})
	}
	slideshow.setting.ispaused=!slideshow.setting.ispaused
	}
},
showslide:function(keyword){
	var slideshow=this
	var setting=slideshow.setting
	var totalimages=setting.imagearray.length
	var imgindex=(keyword=="next")? (setting.curimage<totalimages-1? setting.curimage+1 : 0)
	: (keyword=="prev")? (setting.curimage>0? setting.curimage-1 : totalimages-1)
	: Math.min(keyword, totalimages-1)
	setting.gallerylayers[setting.bglayer].innerHTML=simpleGallery.routines.getSlideHTML(setting.imagearray[imgindex])
	setting.$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.$navpanel.stop().animate({top:endpoint}, simpleGallery_navpanel.slideduration, 'swing')
	if (setting.longestdesc!="") //if at least one slide contains a description (feature is enabled)
	this.showhidedescpanel(state)
},
showhidedescpanel:function(state){
	var setting=this.setting
	var endpoint=(state=="show")? 0 : -setting.descpanelheight
	setting.$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:absolute; border:0; cursor:hand; cursor:pointer; top:'+simpleGallery_navpanel.imageSpacing.offsetTop[i]+'px;';
	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 id="nav'+title+'"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)
	$('<div class="navpanelbg"></div><div class="navpanelfg"></div>') //create inner nav panel DIVs
	.css({position:'absolute', left:0, top:0, width:'100%', height:'100%'})
	.eq(0).css({background:simpleGallery_navpanel.panel.background}).end() //"navpanelbg" div
	.eq(1).css({paddingTop:simpleGallery_navpanel.panel.paddingTop, textAlign:'center', color:'white'}).html(interfaceHTML).end() //"navpanelfg" div
	.appendTo(setting.$navpanel)
	return setting.$navpanel.find('img.navimages, div.gallerystatus').get() //return 4 nav related images and DIVs as DOM objects
},
adddescpanel:function(setting){
	setting.$descpanel=$('<div class="gallerydesc"><div class="gallerydescbg"></div><div class="gallerydescfg"><div class="gallerydesctext"></div></div></div>')
	.css({position:'absolute', width:'100%', left:0, top:-1000, zIndex:'1001'})
	.find('div').css({position:'absolute', left:0, top:0, width:'100%'})
	.eq(0).css({background:'black', opacity:simpleGallery_navpanel.panel.opacity}).end() //"gallerydescbg" div
	.eq(1).css({color:'white'}).end() //"gallerydescfg" div
	.eq(2).html(setting.longestdesc).end().end()
	.appendTo(setting.$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=/"
}
}