1//Step Carousel Viewer: By Dynamic Drive, at http://www.dynamicdrive.com 2//** Created: March 19th, 08' 3//** Aug 16th, 08'- Updated to v 1.4: 4 //1) Adds ability to set speed/duration of panel animation (in milliseconds) 5 //2) Adds persistence support, so the last viewed panel is recalled when viewer returns within same browser session 6 //3) Adds ability to specify whether panels should stop at the very last and first panel, or wrap around and start all over again 7 //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 8 9//** Aug 27th, 08'- Nav buttons (if enabled) also repositions themselves now if window is resized 10 11//** Sept 23rd, 08'- Updated to v 1.6: 12 //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. 13 //2) Adds ability for Carousel to auto rotate dictated by the new parameter: autostep: {enable:true, moveby:1, pause:3000} 14 //2i) During Auto Rotate, Carousel pauses onMouseover, resumes onMouseout. Clicking Carousel halts auto rotate. 15 16//** Oct 22nd, 08'- Updated to v 1.6.1, which fixes functions stepBy() and stepTo() not stopping auto stepping of Carousel when called. 17 18var stepcarousel={ 19 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 20 defaultbuttonsfade: 0.4, //Fade degree for disabled nav buttons (0=completely transparent, 1=completely opaque) 21 configholder: {}, 22 23 getCSSValue:function(val){ //Returns either 0 (if val contains 'auto') or val as an integer 24 return (val=="auto")? 0 : parseInt(val) 25 }, 26 27 getremotepanels:function($, config){ //function to fetch external page containing the panel DIVs 28 config.$belt.html(this.ajaxloadingmsg) 29 $.ajax({ 30 url: config.contenttype[1], //path to external content 31 async: true, 32 error:function(ajaxrequest){ 33 config.$belt.html('Error fetching content.<br />Server Response: '+ajaxrequest.responseText) 34 }, 35 success:function(content){ 36 config.$belt.html(content) 37 config.$panels=config.$gallery.find('.'+config.panelclass) 38 stepcarousel.alignpanels($, config) 39 } 40 }) 41 }, 42 43 getoffset:function(what, offsettype){ 44 return (what.offsetParent)? what[offsettype]+this.getoffset(what.offsetParent, offsettype) : what[offsettype] 45 }, 46 47 getCookie:function(Name){ 48 var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair 49 if (document.cookie.match(re)) //if cookie found 50 return document.cookie.match(re)[0].split("=")[1] //return its value 51 return null 52 }, 53 54 setCookie:function(name, value){ 55 document.cookie = name+"="+value 56 }, 57 58 fadebuttons:function(config, currentpanel){ 59 config.$leftnavbutton.fadeTo('fast', currentpanel==0? this.defaultbuttonsfade : 1) 60 config.$rightnavbutton.fadeTo('fast', currentpanel==config.lastvisiblepanel? this.defaultbuttonsfade : 1) 61 }, 62 63 addnavbuttons:function(config, currentpanel){ 64 config.$leftnavbutton=jQuery('<img src="'+config.defaultbuttons.leftnav[0]+'">').css({zIndex:50, position:'absolute', left:config.offsets.left+config.defaultbuttons.leftnav[1]+'px', top:config.offsets.top+config.defaultbuttons.leftnav[2]+'px', cursor:'hand', cursor:'pointer'}).attr({title:'Back '+config.defaultbuttons.moveby+' panels'}).appendTo('body') 65 config.$rightnavbutton=jQuery('<img src="'+config.defaultbuttons.rightnav[0]+'">').css({zIndex:50, position:'absolute', left:config.offsets.left+config.$gallery.get(0).offsetWidth+config.defaultbuttons.rightnav[1]+'px', top:config.offsets.top+config.defaultbuttons.rightnav[2]+'px', cursor:'hand', cursor:'pointer'}).attr({title:'Forward '+config.defaultbuttons.moveby+' panels'}).appendTo('body') 66 config.$leftnavbutton.bind('click', function(){ //assign nav button event handlers 67 stepcarousel.stepBy(config.galleryid, -config.defaultbuttons.moveby) 68 }) 69 config.$rightnavbutton.bind('click', function(){ //assign nav button event handlers 70 stepcarousel.stepBy(config.galleryid, config.defaultbuttons.moveby) 71 }) 72 if (config.panelbehavior.wraparound==false){ //if carousel viewer should stop at first or last panel (instead of wrap back or forth) 73 this.fadebuttons(config, currentpanel) 74 } 75 return config.$leftnavbutton.add(config.$rightnavbutton) 76 }, 77 78 stopautostep:function(config){ 79 clearTimeout(config.steptimer)
80 clearTimeout(config.resumeautostep) 81 }, 82 83 alignpanels:function($, config){ 84 var paneloffset=0 85 config.paneloffsets=[paneloffset] //array to store upper left offset of each panel (1st element=0) 86 config.panelwidths=[] //array to store widths of each panel 87 config.$panels.each(function(index){ //loop through panels 88 var $currentpanel=$(this) 89 $currentpanel.css({float: 'none', position: 'absolute', left: paneloffset+'px'}) //position panel 90 $currentpanel.bind('click', function(e){return config.onpanelclick(e.target)}) //bind onpanelclick() to onclick event 91 paneloffset+=stepcarousel.getCSSValue($currentpanel.css('marginRight')) + parseInt($currentpanel.get(0).offsetWidth || $currentpanel.css('width')) //calculate next panel offset 92 config.paneloffsets.push(paneloffset) //remember this offset 93 config.panelwidths.push(paneloffset-config.paneloffsets[config.paneloffsets.length-2]) //remember panel width 94 }) 95 config.paneloffsets.pop() //delete last offset (redundant) 96 var addpanelwidths=0 97 var lastpanelindex=config.$panels.length-1 98 config.lastvisiblepanel=lastpanelindex 99 for (var i=config.$panels.length-1; i>=0; i--){ 100 addpanelwidths+=(i==lastpanelindex? config.panelwidths[lastpanelindex] : config.paneloffsets[i+1]-config.paneloffsets[i]) 101 if (config.gallerywidth>addpanelwidths){ 102 config.lastvisiblepanel=i //calculate index of panel that when in 1st position reveals the very last panel all at once based on gallery width 103 } 104 } 105 config.$belt.css({width: paneloffset+'px'}) //Set Belt DIV to total panels' widths 106 config.currentpanel=(config.panelbehavior.persist)? parseInt(this.getCookie(window[config.galleryid+"persist"])) : 0 //determine 1st panel to show by default 107 config.currentpanel=(typeof config.currentpanel=="number" && config.currentpanel<config.$panels.length)? config.currentpanel : 0 108 if (config.currentpanel!=0){ 109 var endpoint=config.paneloffsets[config.currentpanel]+(config.currentpanel==0? 0 : config.beltoffset) 110 config.$belt.css({left: -endpoint+'px'}) 111 } 112 if (config.defaultbuttons.enable==true){ //if enable default back/forth nav buttons 113 var $navbuttons=this.addnavbuttons(config, config.currentpanel) 114 $(window).bind("load resize", function(){ //refresh position of nav buttons when page loads/resizes, in case offsets weren't available document.oncontentload 115 config.offsets={left:stepcarousel.getoffset(config.$gallery.get(0), "offsetLeft"), top:stepcarousel.getoffset(config.$gallery.get(0), "offsetTop")} 116 config.$leftnavbutton.css({left:config.offsets.left+config.defaultbuttons.leftnav[1]+'px', top:config.offsets.top+config.defaultbuttons.leftnav[2]+'px'}) 117 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'}) 118 }) 119 } 120 if (config.autostep && config.autostep.enable){ //enable auto stepping of Carousel? 121 var $carouselparts=config.$gallery.add(typeof $navbuttons!="undefined"? $navbuttons : null) 122 $carouselparts.bind('click', function(){ 123 stepcarousel.stopautostep(config) 124 config.autostep.status="stopped" 125 }) 126 $carouselparts.hover(function(){ //onMouseover 127 stepcarousel.stopautostep(config) 128 config.autostep.hoverstate="over" 129 }, function(){ //onMouseout 130 if (config.steptimer && config.autostep.hoverstate=="over" && config.autostep.status!="stopped"){ 131 config.resumeautostep=setTimeout(function(){ 132 stepcarousel.autorotate(config.galleryid) 133 config.autostep.hoverstate="out" 134 }, 500) 135 } 136 }) 137 config.steptimer=setTimeout(function(){stepcarousel.autorotate(config.galleryid)}, config.autostep.pause) //automatically rotate Carousel Viewer 138 } //end enable auto stepping check 139 this.statusreport(config.galleryid) 140 config.oninit() 141 config.onslideaction(this) 142 }, 143 144 stepTo:function(galleryid, pindex){ /*User entered pindex starts at 1 for intuitiveness. Internally pindex still starts at 0 */ 145 var config=stepcarousel.configholder[galleryid] 146 if (typeof config=="undefined"){ 147 alert("There's an error with your set up of Carousel Viewer \""+galleryid+ "\"!") 148 return 149 } 150 stepcarousel.stopautostep(config) 151 var pindex=Math.min(pindex-1, config.paneloffsets.length-1) 152 var endpoint=config.paneloffsets[pindex]+(pindex==0? 0 : config.beltoffset) 153 if (config.panelbehavior.wraparound==false && config.defaultbuttons.enable==true){ //if carousel viewer should stop at first or last panel (instead of wrap back or forth) 154 this.fadebuttons(config, pindex) 155 } 156 config.$belt.animate({left: -endpoint+'px'}, config.panelbehavior.speed, function(){config.onslideaction(this)}) 157 config.currentpanel=pindex 158 this.statusreport(galleryid) 159 }, 160 161 stepBy:function(galleryid, steps){ //isauto if defined indicates stepBy() is being called automatically 162 var config=stepcarousel.configholder[galleryid] 163 if (typeof config=="undefined"){ 164 alert("There's an error with your set up of Carousel Viewer \""+galleryid+ "\"!") 165 return 166 } 167 stepcarousel.stopautostep(config) 168 var direction=(steps>0)? 'forward' : 'back' //If "steps" is negative, that means backwards 169 var pindex=config.currentpanel+steps //index of panel to stop at 170 if (config.panelbehavior.wraparound==false){ //if carousel viewer should stop at first or last panel (instead of wrap back or forth) 171 pindex=(direction=="back" && pindex<=0)? 0 : (direction=="forward")? Math.min(pindex, config.lastvisiblepanel) : pindex 172 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 173 stepcarousel.fadebuttons(config, pindex) 174 } 175 } 176 else{ //else, for normal stepBy behavior 177 if (pindex>config.lastvisiblepanel && direction=="forward"){ 178 //if destination pindex is greater than last visible panel, yet we're currently not at the end of the carousel yet 179 pindex=(config.currentpanel<config.lastvisiblepanel)? config.lastvisiblepanel : 0 180 } 181 else if (pindex<0 && direction=="back"){ 182 //if destination pindex is less than 0, yet we're currently not at the beginning of the carousel yet 183 pindex=(config.currentpanel>0)? 0 : config.lastvisiblepanel /*wrap around left*/ 184 } 185 } 186 var endpoint=config.paneloffsets[pindex]+(pindex==0? 0 : config.beltoffset) //left distance for Belt DIV to travel to 187 if (pindex==0 && direction=='forward' || config.currentpanel==0 && direction=='back' && config.panelbehavior.wraparound==true){ //decide whether to apply "push pull" effect 188 config.$belt.animate({left: -config.paneloffsets[config.currentpanel]-(direction=='forward'? 100 : -30)+'px'}, 'normal', function(){ 189 config.$belt.animate({left: -endpoint+'px'}, config.panelbehavior.speed, function(){config.onslideaction(this)}) 190 }) 191 } 192 else 193 config.$belt.animate({left: -endpoint+'px'}, config.panelbehavior.speed, function(){config.onslideaction(this)}) 194 config.currentpanel=pindex 195 this.statusreport(galleryid) 196 }, 197 198 autorotate:function(galleryid){ 199 var config=stepcarousel.configholder[galleryid] 200 if (config.$gallery.attr('_ismouseover')!="yes"){ 201 this.stepBy(galleryid, config.autostep.moveby) 202 } 203 config.steptimer=setTimeout(function(){stepcarousel.autorotate(galleryid)}, config.autostep.pause) 204 }, 205 206 statusreport:function(galleryid){ 207 var config=stepcarousel.configholder[galleryid] 208 var startpoint=config.currentpanel //index of first visible panel 209 var visiblewidth=0 210 for (var endpoint=startpoint; endpoint<config.paneloffsets.length; endpoint++){ //index (endpoint) of last visible panel 211 visiblewidth+=config.panelwidths[endpoint] 212 if (visiblewidth>config.gallerywidth){ 213 break 214 } 215 } 216 startpoint+=1 //format startpoint for user friendiness 217 endpoint=(endpoint+1==startpoint)? startpoint : endpoint //If only one image visible on the screen and partially hidden, set endpoint to startpoint 218 var valuearray=[startpoint, endpoint, config.panelwidths.length] 219 for (var i=0; i<config.statusvars.length; i++){ 220 window[config.statusvars[i]]=valuearray[i] //Define variable (with user specified name) and set to one of the status values 221 config.$statusobjs[i].text(valuearray[i]+" ") //Populate element on page with ID="user specified name" with one of the status values 222 } 223 }, 224 225 setup:function(config){ 226 //Disable Step Gallery scrollbars ASAP dynamically (enabled for sake of users with JS disabled)
227 document.write('<style type="text/css">\n#'+config.galleryid+'{overflow: hidden;}\n</style>') 228 jQuery(document).ready(function($){ 229 config.$gallery=$('#'+config.galleryid) 230 config.gallerywidth=config.$gallery.width() 231 config.offsets={left:stepcarousel.getoffset(config.$gallery.get(0), "offsetLeft"), top:stepcarousel.getoffset(config.$gallery.get(0), "offsetTop")} 232 config.$belt=config.$gallery.find('.'+config.beltclass) //Find Belt DIV that contains all the panels 233 config.$panels=config.$gallery.find('.'+config.panelclass) //Find Panel DIVs that each contain a slide 234 config.panelbehavior.wraparound=(config.autostep && config.autostep.enable)? true : config.panelbehavior.wraparound //if auto step enabled, set "wraparound" to true 235 config.onpanelclick=(typeof config.onpanelclick=="undefined")? function(target){} : config.onpanelclick //attach custom "onpanelclick" event handler 236 config.onslideaction=(typeof config.onslide=="undefined")? function(){} : function(beltobj){$(beltobj).stop(); config.onslide()} //attach custom "onslide" event handler 237 config.oninit=(typeof config.oninit=="undefined")? function(){} : config.oninit //attach custom "oninit" event handler 238 config.beltoffset=stepcarousel.getCSSValue(config.$belt.css('marginLeft')) //Find length of Belt DIV's left margin 239 config.statusvars=config.statusvars || [] //get variable names that will hold "start", "end", and "total" slides info 240 config.$statusobjs=[$('#'+config.statusvars[0]), $('#'+config.statusvars[1]), $('#'+config.statusvars[2])] 241 config.currentpanel=0 242 stepcarousel.configholder[config.galleryid]=config //store config parameter as a variable 243 if (config.contenttype[0]=="ajax" && typeof config.contenttype[1]!="undefined") //fetch ajax content? 244 stepcarousel.getremotepanels($, config) 245 else 246 stepcarousel.alignpanels($, config) //align panels and initialize gallery 247 }) //end document.ready 248 jQuery(window).bind('unload', function(){ //clean up 249 if (config.panelbehavior.persist){ 250 stepcarousel.setCookie(window[config.galleryid+"persist"], config.currentpanel) 251 } 252 jQuery.each(config, function(ai, oi){ 253 oi=null 254 }) 255 config=null 256 }) 257 } 258} 259 260
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