//** 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



	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



		})



	})



}







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" width="240" />'



		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:'black', opacity:simpleGallery_navpanel.panel.opacity}).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=/"



	}



}