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From 2014.igem.org

//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.

//** Oct 22nd, 08'- Updated to v 1.6.1, which fixes functions stepBy() and stepTo() not stopping auto stepping of Carousel when called.

var stepcarousel={

ajaxloadingmsg: '', //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.
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 class="scrollbut" 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 class="scrollbut" 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) },

stopautostep:function(config){ clearTimeout(config.steptimer) clearTimeout(config.resumeautostep) },

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 || $currentpanel.css('width')) //calculate next panel offset config.paneloffsets.push(paneloffset) //remember this offset config.panelwidths.push(paneloffset-config.paneloffsets[config.paneloffsets.length-2]) //remember panel width }) config.paneloffsets.pop() //delete last offset (redundant) var addpanelwidths=0 var lastpanelindex=config.$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 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(){ stepcarousel.stopautostep(config) config.autostep.status="stopped" }) $carouselparts.hover(function(){ //onMouseover stepcarousel.stopautostep(config) 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 } stepcarousel.stopautostep(config) 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) },

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 } stepcarousel.stopautostep(config) 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) },

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 } },

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 }) } }