//Step Carousel Viewer: By Dynamic Drive, at http://www.dynamicdrive.com
//** Created: March 19th, 08'
//** Aug 16th, 08'- Updated to v 1.4:
	//1) Adds ability to set speed/duration of panel animation (in milliseconds)
	//2) Adds persistence support, so the last viewed panel is recalled when viewer returns within same browser session
	//3) Adds ability to specify whether panels should stop at the very last and first panel, or wrap around and start all over again
	//4) Adds option to specify two navigational image links positioned to the left and right of the Carousel Viewer to move the panels back and forth

//** Aug 27th, 08'- Nav buttons (if enabled) also repositions themselves now if window is resized

//** Sept 23rd, 08'- Updated to v 1.6:
	//1) Carousel now stops at the very last visible panel, instead of the last panel itself. In other words, no more white space at the end.
	//2) Adds ability for Carousel to auto rotate dictated by the new parameter: autostep: {enable:true, moveby:1, pause:3000}
	//2i) During Auto Rotate, Carousel pauses onMouseover, resumes onMouseout. Clicking Carousel halts auto rotate.

var stepcarousel={
	ajaxloadingmsg: '<div style="margin: 1em; font-weight: bold"><img src="ajaxloadr.gif" style="vertical-align: middle" /> Fetching Content. Please wait...</div>', //customize HTML to show while fetching Ajax content
	defaultbuttonsfade: 0.4, //Fade degree for disabled nav buttons (0=completely transparent, 1=completely opaque)
	configholder: {},

	getCSSValue:function(val){ //Returns either 0 (if val contains 'auto') or val as an integer
		return (val=="auto")? 0 : parseInt(val)
	},

	getremotepanels:function($, config){ //function to fetch external page containing the panel DIVs
		config.$belt.html(this.ajaxloadingmsg)
		$.ajax({
			url: config.contenttype[1], //path to external content
			async: true,
			error:function(ajaxrequest){
				config.$belt.html('Error fetching content.<br />Server Response: '+ajaxrequest.responseText)
			},
			success:function(content){
				config.$belt.html(content)
				config.$panels=config.$gallery.find('.'+config.panelclass)
				stepcarousel.alignpanels($, config)
			}
		})
	},

	getoffset:function(what, offsettype){
		return (what.offsetParent)? what[offsettype]+this.getoffset(what.offsetParent, offsettype) : what[offsettype]
	},

	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
	},

	fadebuttons:function(config, currentpanel){
		config.$leftnavbutton.fadeTo('fast', currentpanel==0? this.defaultbuttonsfade : 1)
		config.$rightnavbutton.fadeTo('fast', currentpanel==config.lastvisiblepanel? this.defaultbuttonsfade : 1)
	},

	addnavbuttons:function(config, currentpanel){
		config.$leftnavbutton=$('<img src="'+config.defaultbuttons.leftnav[0]+'">').css({zIndex:50, position:'absolute', left:config.offsets.left+config.defaultbuttons.leftnav[1]+'px', top:config.offsets.top+config.defaultbuttons.leftnav[2]+'px', cursor:'hand', cursor:'pointer'}).attr({title:'Back '+config.defaultbuttons.moveby+' panels'}).appendTo('body')
		config.$rightnavbutton=$('<img src="'+config.defaultbuttons.rightnav[0]+'">').css({zIndex:50, position:'absolute', left:config.offsets.left+config.$gallery.get(0).offsetWidth+config.defaultbuttons.rightnav[1]+'px', top:config.offsets.top+config.defaultbuttons.rightnav[2]+'px', cursor:'hand', cursor:'pointer'}).attr({title:'Forward '+config.defaultbuttons.moveby+' panels'}).appendTo('body')
		config.$leftnavbutton.bind('click', function(){ //assign nav button event handlers
			stepcarousel.stepBy(config.galleryid, -config.defaultbuttons.moveby)
		})
		config.$rightnavbutton.bind('click', function(){ //assign nav button event handlers
			stepcarousel.stepBy(config.galleryid, config.defaultbuttons.moveby)
		})
		if (config.panelbehavior.wraparound==false){ //if carousel viewer should stop at first or last panel (instead of wrap back or forth)
			this.fadebuttons(config, currentpanel)
		}
		return config.$leftnavbutton.add(config.$rightnavbutton)
	},

	alignpanels:function($, config){
		var paneloffset=0
		config.paneloffsets=[paneloffset] //array to store upper left offset of each panel (1st element=0)
		config.panelwidths=[] //array to store widths of each panel
		config.$panels.each(function(index){ //loop through panels
			var $currentpanel=$(this)
			$currentpanel.css({float: 'none', position: 'absolute', left: paneloffset+'px' }) //position panel
			$currentpanel.bind('click', function(e){return config.onpanelclick(e.target)}) //bind onpanelclick() to onclick event
			paneloffset+=stepcarousel.getCSSValue($currentpanel.css('marginRight')) + parseInt($currentpanel.get(0).offsetWidth || $currentpanel.css('width')) //calculate next panel offset//    !!!!!!!+40 adds space between pics!!!!!!!!
			config.panelwidths.push(paneloffset-config.paneloffsets[config.paneloffsets.length-2]) //remember panel width
			config.paneloffsets.push(paneloffset) //remember this offset         !!!!!!!!!!!CHANGED TO center PICTURE!!!!!!!!!!!!!!!!!!. 
			
		})
		config.paneloffsets.pop() //delete last offset (redundant)
		var addpanelwidths=0
		var lastpanelindex=config.$panels.length-1
		config.lastvisiblepanel=lastpanelindex
		for (var i=config.$panels.length-1; i>=0; i--){
			addpanelwidths+=(i==lastpanelindex? config.panelwidths[lastpanelindex] : config.paneloffsets[i+1]-config.paneloffsets[i])
			if (config.gallerywidth>addpanelwidths){
				config.lastvisiblepanel=i //calculate index of panel that when in 1st position reveals the very last panel all at once based on gallery width
			}
		}
		config.$belt.css({width: paneloffset+'px'}) //Set Belt DIV to total panels' widths
		config.currentpanel=(config.panelbehavior.persist)? parseInt(this.getCookie(window[config.galleryid+"persist"])) : 0 //determine 1st panel to show by default
		stepcarousel.stepTo('mygallery', 1); 
		config.currentpanel=(typeof config.currentpanel=="number" && config.currentpanel<config.$panels.length)? config.currentpanel : 0
		if (config.currentpanel!=0){
			var endpoint=config.paneloffsets[config.currentpanel]+(config.currentpanel==0? 0 : config.beltoffset)
			config.$belt.css({left: -endpoint+'px'})
		}
		if (config.defaultbuttons.enable==true){ //if enable default back/forth nav buttons
			var $navbuttons=this.addnavbuttons(config, config.currentpanel)
			$(window).bind("load resize", function(){ //refresh position of nav buttons when page loads/resizes, in case offsets weren't available document.oncontentload
				config.offsets={left:stepcarousel.getoffset(config.$gallery.get(0), "offsetLeft"), top:stepcarousel.getoffset(config.$gallery.get(0), "offsetTop")}
				config.$leftnavbutton.css({left:config.offsets.left+config.defaultbuttons.leftnav[1]+'px', top:config.offsets.top+config.defaultbuttons.leftnav[2]+'px'})
				config.$rightnavbutton.css({left:config.offsets.left+config.$gallery.get(0).offsetWidth+config.defaultbuttons.rightnav[1]+'px', top:config.offsets.top+config.defaultbuttons.rightnav[2]+'px'})
			})
		}
		if (config.autostep && config.autostep.enable){ //enable auto stepping of Carousel?		
			var $carouselparts=config.$gallery.add(typeof $navbuttons!="undefined"? $navbuttons : null)
			$carouselparts.bind('click', function(){
				clearTimeout(config.steptimer)
				clearTimeout(config.resumeautostep)
				config.autostep.status="stopped"
			})
			$carouselparts.hover(function(){ //onMouseover
				clearTimeout(config.steptimer)
				clearTimeout(config.resumeautostep)
				config.autostep.hoverstate="over"
			}, function(){ //onMouseout
				if (config.steptimer && config.autostep.hoverstate=="over" && config.autostep.status!="stopped"){
					config.resumeautostep=setTimeout(function(){
						stepcarousel.autorotate(config.galleryid)
						config.autostep.hoverstate="out"
					}, 500)
				}
			})
			config.steptimer=setTimeout(function(){stepcarousel.autorotate(config.galleryid)}, config.autostep.pause) //automatically rotate Carousel Viewer
		} //end enable auto stepping check
		this.statusreport(config.galleryid)
		
		config.oninit()
		config.onslideaction(this)
	},

	stepTo:function(galleryid, pindex){ /*User entered pindex starts at 1 for intuitiveness. Internally pindex still starts at 0 */
		var config=stepcarousel.configholder[galleryid]

		if (typeof config=="undefined"){
			alert("There's an error with your set up of Carousel Viewer \""+galleryid+ "\"!")
			return
		}
		var pindex=Math.min(pindex-1, config.paneloffsets.length-1)
		var endpoint=config.paneloffsets[pindex]+(pindex==0? 0 : config.beltoffset)
		if (config.panelbehavior.wraparound==false && config.defaultbuttons.enable==true){ //if carousel viewer should stop at first or last panel (instead of wrap back or forth)
			this.fadebuttons(config, pindex)
		}
		config.$belt.animate({left: -endpoint+'px'}, config.panelbehavior.speed, function(){config.onslideaction(this)})
		config.currentpanel=pindex
		this.statusreport(galleryid)
		this.colourSquares(pindex)
		this.mulitmove()
		
	
	},
	
	loaded:function(){
			document.getElementById("comments").style.visibility='visible';
			$("#hider").fadeTo(120, 0.0);//Takes off blind that has hidden the images loading
			$("#hiderb").fadeTo(120, 0.0);//Takes off blind that has hidden the images loading
			setTimeout ( "$('#blind').fadeOut(120);", 600 );//Takes off blind that has hidden the images loading. Timed to hide flashing in Safari and ie.!!!!
			
			//$("#blind").fadeOut(120);//Takes off blind that has hidden the images loading
			for (var z = 1; z <= document.totalNumPic; z++) {//Instead of 30 I should get the number of pictures
			
				var comment="#comment"+z
					
				
				
				$(comment).hide(); //hides all comment comment
					$("#comment1").show(); //hides all comment comment
				
				
			}
	},
	mulitmove:function(){
	for (var z = 1; z <= document.totalNumPic; z++) {//Instead of 30 I should get the number of pictures
		
		var panel2="#panel"+z
		
		$(panel2).show();
		//	setTimeout ( "$("+"'"+panel2+"'"+").hide();", 600 );

		
	}
},
		
	colourSquares:function(pindex){
		var actpindex = (pindex+1)
		if (document.currentloc != actpindex) {//Check that this isn't refading the current location
			var pindexup = pindex+4;
			var pindexdown = pindex-4;
			for (var x = pindex; x <= pindexup; x++) {
				var panel="#panel"+x
				//var panelz="panel"+x
				var actpindex = (pindex+1)
				
			//	$(panel).fadeTo(0, 0.22);
				
			 	//setTimeout ( "$("+"'"+panel+"'"+").fadeTo('fast', 0.11);", 600 );
				$(panel).animate({ 					    
				        opacity: 0.4,
						fontSize: "3px" //This is here because ei doen't like this if there is only one thing to animate???!!!!					       
				      }, 0 );
		 			
				
					
					
				}
				for (var z = 1; z <= document.totalNumPic; z++) {//Instead of 30 I should get the number of pictures
					var square="slidenav"+z 
					var comment="#comment"+z
					var preview="#preview"+z 
					var preview2="preview"+z 
					var previewb="#previewb"+z 
					var previewb2="previewb"+z
					var panel="panel"+z
					var panel2="#panel"+z
					document.getElementById(square).style.background = "url('') no-repeat";
				//	document.getElementById(panel).style.zIndex="0";
					//$(panel2).fadeTo(0, 1);//fades preview
					//setTimeout ( "$("+"'"+preview2+"'"+").hide();", 400 );
					$(preview).hide();
					$(previewb).hide();
					
					$(comment).hide(); //hides all comment comment
					$("#hider2").fadeIn("fast");
					$("#hiderb2").fadeIn("fast");
					//$(panel2).hide();
				//	$("#blind3").fadeIn("fast");
					//$(preview).fadeTo(120, 0.0);//fades preview
					
					
				}
		   }
		if (document.currentloc != actpindex) {//Check that this isn't refading the current
			var test="slidenav"+(pindex+1)
			var panel="panel"+(pindex+1)
				var panel2="#panel"+(pindex+1)
					var panel3="#panel"+(pindex+2)
						var panel4="#panel"+(pindex+3)
							var panel5="#panel"+(pindex)
			document.getElementById(test).style.background = "url('images/grey_circle.gif') no-repeat";
		//	document.getElementById(panel).style.zIndex="5";
			
			var commentup="#comment"+(pindex+1)
			var previewup="#preview"+(pindex+1)
			var previewupb="#previewb"+(pindex+1)
		   // $(panel).fadeTo("fast", 1);
		   	$(commentup).show();
	//	$(panel2).show();
		//$(panel3).show();
		//$(panel4).show();
		//$(panel5).show();
		//$(panel2).fadeTo(0, 1);
			//$(previewup).show();
			//$("#hider2").fadeOut("fast");
			//$(previewup).fadeTo(120, 1.1);
			//	$("#blind3").fadeOut('fast');
			setTimeout ( "$("+"'"+previewup+"'"+").show();", 600 );
			setTimeout ( "$("+"'"+previewupb+"'"+").show();", 600 );
			setTimeout ( "$('#hider2').fadeOut('fast');", 600 );
			setTimeout ( "$('#hiderb2').fadeOut('fast');", 600 );
		//	setTimeout ( "$('#blind3').fadeTo(120, 0.0);", 600 );
			$(panel2).animate({ 					    
			        opacity: 1.0,
					fontSize: "3px" //This is here because ei doen't like this if there is only one thing to animate???!!!!					       
			      }, 0 );
			}
				
			document.currentloc = pindex+1;//remember current location
		},
		

	stepBy:function(galleryid, steps){ //isauto if defined indicates stepBy() is being called automatically
		var config=stepcarousel.configholder[galleryid]
		if (typeof config=="undefined"){
			alert("There's an error with your set up of Carousel Viewer \""+galleryid+ "\"!")
			return
		}
		var direction=(steps>0)? 'forward' : 'back' //If "steps" is negative, that means backwards
		var pindex=config.currentpanel+steps //index of panel to stop at
		if (config.panelbehavior.wraparound==false){ //if carousel viewer should stop at first or last panel (instead of wrap back or forth)
			pindex=(direction=="back" && pindex<=0)? 0 : (direction=="forward")? Math.min(pindex, config.lastvisiblepanel) : pindex
			if (config.defaultbuttons.enable==true){ //if default nav buttons are enabled, fade them in and out depending on if at start or end of carousel
				stepcarousel.fadebuttons(config, pindex)
			}	
		}
		else{ //else, for normal stepBy behavior
			if (pindex>config.lastvisiblepanel && direction=="forward"){
				//if destination pindex is greater than last visible panel, yet we're currently not at the end of the carousel yet
				pindex=(config.currentpanel<config.lastvisiblepanel)? config.lastvisiblepanel : 0
			
			}
			else if (pindex<0 && direction=="back"){
				//if destination pindex is less than 0, yet we're currently not at the beginning of the carousel yet
				pindex=(config.currentpanel>0)? 0 : config.lastvisiblepanel /*wrap around left*/
			
			}
		}
		var endpoint=config.paneloffsets[pindex]+(pindex==0? 0 : config.beltoffset) //left distance for Belt DIV to travel to
		if (pindex==0 && direction=='forward' || config.currentpanel==0 && direction=='back' && config.panelbehavior.wraparound==true){
				
			 //decide whether to apply "push pull" effect
			config.$belt.animate({left: -config.paneloffsets[config.currentpanel]-(direction=='forward'? 100 : -30)+'px'}, 'normal', function(){
				
				config.$belt.animate({left: -endpoint+'px'}, config.panelbehavior.speed, function(){config.onslideaction(this)})
				
			})
			
		}
		else
			config.$belt.animate({left: -endpoint+'px'}, config.panelbehavior.speed, function(){config.onslideaction(this)})
		config.currentpanel=pindex
		this.statusreport(galleryid)
		this.colourSquares(pindex)
	
	
		if (pindex==0 && direction=='forward' || config.currentpanel==(document.totalNumPic-1) && direction=='back' && config.panelbehavior.wraparound==true){
					this.mulitmove() //This checks direction and if it is the first or last image then shows hidden images. Hidden to speen up carousel on slow computers !!!!!!
		}

	},

	autorotate:function(galleryid){
		var config=stepcarousel.configholder[galleryid]
		if (config.$gallery.attr('_ismouseover')!="yes"){
			this.stepBy(galleryid, config.autostep.moveby)
		}
		config.steptimer=setTimeout(function(){stepcarousel.autorotate(galleryid)}, config.autostep.pause)
	},

	statusreport:function(galleryid){
		var config=stepcarousel.configholder[galleryid]
		var startpoint=config.currentpanel //index of first visible panel 
		var visiblewidth=0
		for (var endpoint=startpoint; endpoint<config.paneloffsets.length; endpoint++){ //index (endpoint) of last visible panel
			visiblewidth+=config.panelwidths[endpoint]
			if (visiblewidth>config.gallerywidth){
				break
			}
		}
		startpoint+=1 //format startpoint for user friendiness
		endpoint=(endpoint+1==startpoint)? startpoint : endpoint //If only one image visible on the screen and partially hidden, set endpoint to startpoint
		var valuearray=[startpoint, endpoint, config.panelwidths.length]
		for (var i=0; i<config.statusvars.length; i++){
			window[config.statusvars[i]]=valuearray[i] //Define variable (with user specified name) and set to one of the status values
			config.$statusobjs[i].text(valuearray[i]+" ") //Populate element on page with ID="user specified name" with one of the status values
		document.totalNumPic = config.panelwidths.length;//remember Number of Picture!!!!!!!!!!!!
		}
	},

	setup:function(config){
		//Disable Step Gallery scrollbars ASAP dynamically (enabled for sake of users with JS disabled)
		document.write('<style type="text/css">\n#'+config.galleryid+'{overflow: hidden;}\n</style>')
		jQuery(document).ready(function($){
			config.$gallery=$('#'+config.galleryid)
			config.gallerywidth=config.$gallery.width()
			config.offsets={left:stepcarousel.getoffset(config.$gallery.get(0), "offsetLeft"), top:stepcarousel.getoffset(config.$gallery.get(0), "offsetTop")}
			config.$belt=config.$gallery.find('.'+config.beltclass) //Find Belt DIV that contains all the panels
			config.$panels=config.$gallery.find('.'+config.panelclass) //Find Panel DIVs that each contain a slide
			config.panelbehavior.wraparound=(config.autostep && config.autostep.enable)? true : config.panelbehavior.wraparound //if auto step enabled, set "wraparound" to true
			config.onpanelclick=(typeof config.onpanelclick=="undefined")? function(target){} : config.onpanelclick //attach custom "onpanelclick" event handler
			config.onslideaction=(typeof config.onslide=="undefined")? function(){} : function(beltobj){$(beltobj).stop(); config.onslide()} //attach custom "onslide" event handler
			config.oninit=(typeof config.oninit=="undefined")? function(){} : config.oninit //attach custom "oninit" event handler
			config.beltoffset=stepcarousel.getCSSValue(config.$belt.css('marginLeft')) //Find length of Belt DIV's left margin
			config.statusvars=config.statusvars || []  //get variable names that will hold "start", "end", and "total" slides info
			config.$statusobjs=[$('#'+config.statusvars[0]), $('#'+config.statusvars[1]), $('#'+config.statusvars[2])]
			config.currentpanel=0
			stepcarousel.configholder[config.galleryid]=config //store config parameter as a variable
			if (config.contenttype[0]=="ajax" && typeof config.contenttype[1]!="undefined") //fetch ajax content?
				stepcarousel.getremotepanels($, config)
			else
				stepcarousel.alignpanels($, config) //align panels and initialize gallery
		}) //end document.ready
		jQuery(window).bind('unload', function(){ //clean up
			if (config.panelbehavior.persist){
				stepcarousel.setCookie(window[config.galleryid+"persist"], config.currentpanel)
			}
			jQuery.each(config, function(ai, oi){
				oi=null
			})
			config=null
		})
	}
}