St. Pete Buzz: January 2010

//** 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 var stepcarousel={ ajaxloadingmsg: '

Fetching Content. Please wait...

', //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.$leftnavbutton=$('

').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.$rightnavbutton=$('

').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.$rightnavbutton.bind('click', function(){ //assign nav button event handlers stepcarousel.stepBy(config.galleryid, config.defaultbuttons.moveby) }) if (config.panelbehavior.wraparound==false){ //if carousel viewer should stop at first or last panel (instead of wrap back or forth) this.fadebuttons(config, currentpanel) } }, alignpanels:function($, 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.currentpanelconfig.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\n#'+config.galleryid+'{overflow: hidden;}\n') 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.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 }) } }

St. Pete Buzz

Tuesday, January 19, 2010

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