//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: '<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:'Previous project '}).appendTo('body')
config.$rightnavbutton=$('<img src="'+config.defaultbuttons.rightnav[0]+'">').css({zIndex:50, position:'absolute', left:config.offsets.left+config.$gallery.get(0).offsetWidth+config.defaultbuttons.rightnav[1]+'px', top:config.offsets.top+config.defaultbuttons.rightnav[2]+'px', cursor:'hand', cursor:'pointer'}).attr({title:'Next project'}).appendTo('body')
config.$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"
})