347 lines
19 KiB
JavaScript
347 lines
19 KiB
JavaScript
/* Ultimate Fade-in slideshow (v2.6.1)
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* Last updated: March 7th, 2016. This notice must stay intact for usage
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* Author: Dynamic Drive at http://www.dynamicdrive.com/
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* Visit http://www.dynamicdrive.com/ for full source code
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*/
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//Oct 6th, 09' (v2.1): Adds option to randomize display order of images, via new option displaymode.randomize
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//May 24th, 10' (v2.4): Adds new "peakaboo" option to "descreveal" setting. oninit and onslide event handlers added.
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//June 22nd, 14' (v2.6): 1) Slideshow now responsive, supporting percentage values in the dimensions[w, h] option. 2) Swipe to navigate added on both desktop and mobile devices.
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//June 22nd, 14' (v2.6.1): Enabled vertical swiping inside slideshow to scroll page
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//Unofficial Updates: (three following March 6 ,2016 - dates below mark their initial coding for version 2.4)
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//Sept 2nd, '11 Update for loading image bug see: http://www.dynamicdrive.com/forums/showthread.php?p=260188#post260188
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//Sept 4rth '11 Update for initial mouseover bug in some browsers - first image wouldn't show up if mouse was over the show as page loaded
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//Sept 13th '11 Update for missing first image bug in IE - added onerror to onload for routine that tests first image before getting underway
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//March 7, 2016 Update to prevent taps in most tap capable browsers from activating mouseover pause. Android sometimes still has this problem
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// adding this meta tag may help with that: <meta name="viewport" content="user-scalable=yes">
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var fadeSlideShow_descpanel={
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controls: [['x.png', 7, 7], ['restore.png', 10, 11], ['loading.gif', 54, 55]], //full URL and dimensions of close, restore, and loading images
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fontStyle: 'normal 11px Verdana', //font style for text descriptions
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slidespeed: 200 //speed of description panel animation (in millisec)
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}
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//No need to edit beyond here...
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jQuery.noConflict()
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function fadeSlideShow(settingarg){
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this.setting=settingarg
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settingarg=null
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var setting=this.setting
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setting.fadeduration=setting.fadeduration? parseInt(setting.fadeduration) : 500
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setting.curimage=(setting.persist)? fadeSlideShow.routines.getCookie("gallery-"+setting.wrapperid) : 0
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setting.curimage=setting.curimage || 0 //account for curimage being null if cookie is empty
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setting.currentstep=0 //keep track of # of slides slideshow has gone through (applicable in displaymode='auto' only)
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setting.totalsteps=setting.imagearray.length*(setting.displaymode.cycles>0? setting.displaymode.cycles : Infinity) //Total steps limit (applicable in displaymode='auto' only w/ cycles>0)
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setting.fglayer=0, setting.bglayer=1 //index of active and background layer (switches after each change of slide)
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setting.isflexible = /\%/.test(setting.dimensions[0]) || /\%/.test(setting.dimensions[1]) // test if one of slideshow dimension sides is a percentage value
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setting.oninit=setting.oninit || function(){}
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setting.onslide=setting.onslide || function(){}
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if (setting.displaymode.randomize) //randomly shuffle order of images?
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setting.imagearray.sort(function() {return 0.5 - Math.random()})
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var preloadimages=[] //preload images
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setting.longestdesc="" //get longest description of all slides. If no desciptions defined, variable contains ""
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for (var i=0; i<setting.imagearray.length; i++){ //preload images
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preloadimages[i]=new Image()
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preloadimages[i].src=setting.imagearray[i][0]
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if (setting.imagearray[i][3] && setting.imagearray[i][3].length>setting.longestdesc.length)
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setting.longestdesc=setting.imagearray[i][3]
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}
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var closebutt=fadeSlideShow_descpanel.controls[0] //add close button to "desc" panel if descreveal="always"
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setting.closebutton=(setting.descreveal=="always")? '<img class="close" src="'+closebutt[0]+'" style="float:right;cursor:hand;cursor:pointer;width:'+closebutt[1]+'px;height:'+closebutt[2]+'px;margin-left:2px" title="Hide Description" />' : ''
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var slideshow=this
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jQuery(document).ready(function($){ //fire on DOM ready
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var setting=slideshow.setting
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var fullhtml=fadeSlideShow.routines.getFullHTML(setting.imagearray) //get full HTML of entire slideshow
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setting.$wrapperdiv=$('#'+setting.wrapperid).css({position:'relative', visibility:'visible', background:'white', overflow:'hidden', width:setting.dimensions[0], height:setting.dimensions[1]}).empty() //main slideshow DIV
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setting.dimensions = [ // get dimensions of slideshow in pixels
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setting.$wrapperdiv.outerWidth(),
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setting.$wrapperdiv.outerHeight()
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]
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if (setting.$wrapperdiv.length==0){ //if no wrapper DIV found
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//alert("Error: DIV with ID \""+setting.wrapperid+"\" not found on page.")
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console.log("Error: DIV with ID \""+setting.wrapperid+"\" not found on page.");
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return
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}
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setting.$gallerylayers=$('<div class="gallerylayer"></div><div class="gallerylayer"></div>') //two stacked DIVs to display the actual slide
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.css({position:'absolute', left:0, top:0, width:'100%', height:'100%', background:'white'})
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.appendTo(setting.$wrapperdiv)
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var $loadingimg=$('<img src="'+fadeSlideShow_descpanel.controls[2][0]+'" style="position:absolute;width:'+fadeSlideShow_descpanel.controls[2][1]+'px;height:'+fadeSlideShow_descpanel.controls[2][2]+'px" />')
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.css({zIndex:1000,left:setting.dimensions[0]/2-fadeSlideShow_descpanel.controls[2][1]/2, top:setting.dimensions[1]/2-fadeSlideShow_descpanel.controls[2][2]/2}) //center loading gif
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.appendTo(setting.$wrapperdiv)
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var $curimage=setting.$gallerylayers.html(fullhtml).find('img').hide().eq(setting.curimage) //prefill both layers with entire slideshow content, hide all images, and return current image
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if (setting.longestdesc!="" && setting.descreveal!="none"){ //if at least one slide contains a description (versus feature is enabled but no descriptions defined) and descreveal not explicitly disabled
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fadeSlideShow.routines.adddescpanel($, setting)
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if (setting.descreveal=="always"){ //position desc panel so it's visible to begin with
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setting.$descpanel.css({top:setting.dimensions[1]-setting.panelheight})
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setting.$descinner.click(function(e){ //asign click behavior to "close" icon
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if (e.target.className=="close"){
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slideshow.showhidedescpanel('hide')
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}
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})
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setting.$restorebutton.click(function(e){ //asign click behavior to "restore" icon
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slideshow.showhidedescpanel('show')
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$(this).css({visibility:'hidden'})
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})
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}
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else if (setting.descreveal=="ondemand"){ //display desc panel on demand (mouseover)
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setting.$wrapperdiv.bind('mouseenter', function(){slideshow.showhidedescpanel('show')})
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setting.$wrapperdiv.bind('mouseleave', function(){slideshow.showhidedescpanel('hide')})
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}
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}
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setting.$wrapperdiv.bind('mouseleave', function(){setting.ismouseover=false})
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if (setting.$wrapperdiv.swipe){ // if swipe enabled (swipe function exists)
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var swipeOptions={ // swipe object variables
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triggerOnTouchEnd : true,
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triggerOnTouchLeave : true,
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threshold: 75,
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allowPageScroll: 'vertical',
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excludedElements:[]
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}
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swipeOptions.swipeStatus = function(event, phase, direction, distance){
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var evtparent = event.target.parentNode // check parent element of target image
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if (phase == 'start' && evtparent.tagName == 'A'){ // cancel A action when finger makes contact with element
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evtparent.onclick = function(){
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return false
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}
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}
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if (phase == 'cancel' && evtparent.tagName == 'A'){ // if swipe action canceled (so no proper swipe), enable A action
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evtparent.onclick = function(){
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return true
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}
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}
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if (phase == 'end'){
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var navkeyword = /(right)/i.test(direction)? 'prev' : 'next'
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if ( /(left)|(right)/i.test(direction) )
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slideshow.navigate(navkeyword)
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}
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}
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setting.$wrapperdiv.swipe(swipeOptions)
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} // end setting.$wrapperdiv.swipe check
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slideshow.paginateinit($);
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function loaded_or_error(){
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$loadingimg.hide()
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setting.$wrapperdiv.bind('touchstart mouseenter', function(e){ //pause slideshow mouseover
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setting.ismouseover = true;
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if(e.type === 'touchstart'){
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clearTimeout(setting.ismouseovertimer);
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setting.ismouseovertimer = setTimeout(function(){setting.ismouseover = false;}, 600);
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}
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});
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slideshow.showslide(setting.curimage)
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}
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if ($curimage.get(0).complete){loaded_or_error(); //accounf for IE firing image.onload too soon for cached and small images
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} else { //initialize slideshow when first image has fully loaded or errors out
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$(new Image()).bind('load error', loaded_or_error).attr('src', $curimage.attr('src'));
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}
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setting.oninit.call(slideshow) //trigger oninit() event
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$(window).bind('resize', function(){ // when window is resized, reposition description panel and images
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var slideshowdimensions = [
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setting.$wrapperdiv.outerWidth(),
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setting.$wrapperdiv.outerHeight()
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]
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if (slideshowdimensions[0] == setting.dimensions[0] && slideshowdimensions[1] == setting.dimensions[1]){ // if no change in image dimensions, just exit
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return
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}
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setting.dimensions = slideshowdimensions // refresh image dimensions data
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if (setting.$descpanel && setting.$descpanel.length == 1){ // if description panel enabled for slideshow
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setting.$descpanel
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.find('div')
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.css({width:setting.$descpanel.width()-8})
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.eq(2) // reference hidden description panel (used to calculate height of longest message
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.css({height:'auto', background:'blue'}).html(setting.closebutton + setting.longestdesc).end() // populate hidden DIV with longest message
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setting.panelheight = setting.$descpanel.find('div').eq(2).outerHeight() // then get height of that DIV
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setting.$descpanel.css({height: setting.panelheight}) // reset main description panel height
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if (!setting.$restorebutton || (setting.$restorebutton && setting.$restorebutton.css('visibility') == 'hidden')){ // if panel doesn't contain restore button (meaning it should always be repositioned onresize), or there is restore button and it's currenty hidden (meaning panel is currently not minimized)
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setting.$descpanel.css({top:setting.dimensions[1]-setting.panelheight})
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}
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}
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var $slideimage=setting.$gallerylayers.eq(setting.fglayer).find('img').eq(setting.curimage)
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var imgdimensions=[$slideimage.width(), $slideimage.height()] //center align image
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$slideimage.css({marginLeft: (imgdimensions[0]>0 && imgdimensions[0]<setting.dimensions[0])? setting.dimensions[0]/2-imgdimensions[0]/2 : 0})
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$slideimage.css({marginTop: (imgdimensions[1]>0 && imgdimensions[1]<setting.dimensions[1])? setting.dimensions[1]/2-imgdimensions[1]/2 : 0})
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})
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$(window).bind('unload', function(){ //clean up and persist
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if (slideshow.setting.persist) //remember last shown image's index
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fadeSlideShow.routines.setCookie("gallery-"+setting.wrapperid, setting.curimage)
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jQuery.each(slideshow.setting, function(k){
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if (slideshow.setting[k] instanceof Array){
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for (var i=0; i<slideshow.setting[k].length; i++){
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if (slideshow.setting[k][i].tagName=="DIV") //catches 2 gallerylayer divs, gallerystatus div
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slideshow.setting[k][i].innerHTML=null
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slideshow.setting[k][i]=null
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}
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}
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})
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slideshow=slideshow.setting=null
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})
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})
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}
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fadeSlideShow.prototype={
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navigate:function(keyword){
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var setting=this.setting
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clearTimeout(setting.playtimer)
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if (setting.displaymode.type=="auto"){ //in auto mode
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setting.displaymode.type="manual" //switch to "manual" mode when nav buttons are clicked on
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setting.displaymode.wraparound=true //set wraparound option to true
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}
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if (!isNaN(parseInt(keyword))){ //go to specific slide?
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this.showslide(parseInt(keyword))
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}
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else if (/(prev)|(next)/i.test(keyword)){ //go back or forth inside slide?
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this.showslide(keyword.toLowerCase())
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}
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},
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showslide:function(keyword){
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var slideshow=this
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var setting=slideshow.setting
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if (setting.displaymode.type=="auto" && setting.ismouseover && setting.currentstep<=setting.totalsteps){ //if slideshow in autoplay mode and mouse is over it, pause it
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setting.playtimer=setTimeout(function(){slideshow.showslide('next')}, setting.displaymode.pause)
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return
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}
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var totalimages=setting.imagearray.length
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var imgindex=(keyword=="next")? (setting.curimage<totalimages-1? setting.curimage+1 : 0)
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: (keyword=="prev")? (setting.curimage>0? setting.curimage-1 : totalimages-1)
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: Math.min(keyword, totalimages-1)
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var $slideimage=setting.$gallerylayers.eq(setting.bglayer).find('img').hide().eq(imgindex).show() //hide all images except current one
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var imgdimensions=[$slideimage.width(), $slideimage.height()] //center align image
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$slideimage.css({marginLeft: (imgdimensions[0]>0 && imgdimensions[0]<setting.dimensions[0])? setting.dimensions[0]/2-imgdimensions[0]/2 : 0})
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$slideimage.css({marginTop: (imgdimensions[1]>0 && imgdimensions[1]<setting.dimensions[1])? setting.dimensions[1]/2-imgdimensions[1]/2 : 0})
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if (setting.descreveal=="peekaboo" && setting.longestdesc!=""){ //if descreveal is set to "peekaboo", make sure description panel is hidden before next slide is shown
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clearTimeout(setting.hidedesctimer) //clear hide desc panel timer
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slideshow.showhidedescpanel('hide', 0) //and hide it immediately
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}
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setting.$gallerylayers.eq(setting.bglayer).css({zIndex:1000, opacity:0}) //background layer becomes foreground
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.stop().css({opacity:0}).animate({opacity:1}, setting.fadeduration, function(){ //Callback function after fade animation is complete:
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clearTimeout(setting.playtimer)
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try{
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setting.onslide.call(slideshow, setting.$gallerylayers.eq(setting.fglayer).get(0), setting.curimage)
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}catch(e){
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alert("Fade In Slideshow error: An error has occured somwhere in your code attached to the \"onslide\" event: "+e)
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}
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if (setting.descreveal=="peekaboo" && setting.longestdesc!=""){
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slideshow.showhidedescpanel('show')
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setting.hidedesctimer=setTimeout(function(){slideshow.showhidedescpanel('hide')}, setting.displaymode.pause-fadeSlideShow_descpanel.slidespeed)
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}
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setting.currentstep+=1
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if (setting.displaymode.type=="auto"){
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if (setting.currentstep<=setting.totalsteps || setting.displaymode.cycles==0)
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setting.playtimer=setTimeout(function(){slideshow.showslide('next')}, setting.displaymode.pause)
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}
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}) //end callback function
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setting.$gallerylayers.eq(setting.fglayer).css({zIndex:999}) //foreground layer becomes background
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setting.fglayer=setting.bglayer
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setting.bglayer=(setting.bglayer==0)? 1 : 0
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setting.curimage=imgindex
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if (setting.$descpanel){
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setting.$descpanel.css({visibility:(setting.imagearray[imgindex][3])? 'visible' : 'hidden'})
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if (setting.imagearray[imgindex][3]) //if this slide contains a description
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setting.$descinner.empty().html(setting.closebutton + setting.imagearray[imgindex][3])
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}
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if (setting.displaymode.type=="manual" && !setting.displaymode.wraparound){
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this.paginatecontrol()
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}
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if (setting.$status) //if status container defined
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setting.$status.html(setting.curimage+1 + "/" + totalimages)
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},
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showhidedescpanel:function(state, animateduration){
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var setting=this.setting
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var endpoint=(state=="show")? setting.dimensions[1]-setting.panelheight : this.setting.dimensions[1]
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setting.$descpanel.stop().animate({top:endpoint}, (typeof animateduration!="undefined"? animateduration : fadeSlideShow_descpanel.slidespeed), function(){
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if (setting.descreveal=="always" && state=="hide")
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setting.$restorebutton.css({visibility:'visible'}) //show restore button
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})
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},
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paginateinit:function($){
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var slideshow=this
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var setting=this.setting
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if (setting.togglerid){ //if toggler div defined
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setting.$togglerdiv=$("#"+setting.togglerid)
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setting.$prev=setting.$togglerdiv.find('.prev').data('action', 'prev')
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setting.$next=setting.$togglerdiv.find('.next').data('action', 'next')
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setting.$prev.add(setting.$next).click(function(e){ //assign click behavior to prev and next controls
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var $target=$(this)
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slideshow.navigate($target.data('action'))
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e.preventDefault()
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})
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setting.$status=setting.$togglerdiv.find('.status')
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}
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},
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paginatecontrol:function(){
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var setting=this.setting
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setting.$prev.css({opacity:(setting.curimage==0)? 0.4 : 1}).data('action', (setting.curimage==0)? 'none' : 'prev')
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setting.$next.css({opacity:(setting.curimage==setting.imagearray.length-1)? 0.4 : 1}).data('action', (setting.curimage==setting.imagearray.length-1)? 'none' : 'next')
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if (document.documentMode==8){ //in IE8 standards mode, apply opacity to inner image of link
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setting.$prev.find('img:eq(0)').css({opacity:(setting.curimage==0)? 0.4 : 1})
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setting.$next.find('img:eq(0)').css({opacity:(setting.curimage==setting.imagearray.length-1)? 0.4 : 1})
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}
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}
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}
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fadeSlideShow.routines={
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getSlideHTML:function(imgelement){
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var layerHTML=(imgelement[1])? '<a href="'+imgelement[1]+'" target="'+imgelement[2]+'">\n' : '' //hyperlink slide?
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layerHTML+='<img src="'+imgelement[0]+'" style="border-width:0;" class="" />\n'
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layerHTML+=(imgelement[1])? '</a>\n' : ''
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return layerHTML //return HTML for this layer
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},
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getFullHTML:function(imagearray){
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var preloadhtml=''
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for (var i=0; i<imagearray.length; i++)
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preloadhtml+=this.getSlideHTML(imagearray[i])
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return preloadhtml
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},
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adddescpanel:function($, setting){
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setting.$descpanel=$('<div class="fadeslidedescdiv"></div>')
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.css({position:'absolute', visibility:'hidden', width:'100%', left:0, top:setting.dimensions[1], font:fadeSlideShow_descpanel.fontStyle, zIndex:'1001'})
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.appendTo(setting.$wrapperdiv)
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$('<div class="descpanelbg"></div><div class="descpanelfg"></div><div class="descpanelhidden"></div>') //create inner nav panel DIVs
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.css({position:'absolute', left:0, top:0, width:setting.$descpanel.width()-8, padding:'4px'})
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.eq(0).css({background:'black', opacity:0.7}).end() //"descpanelbg" div
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.eq(1).css({color:'white'}).html(setting.closebutton + setting.longestdesc).end() //"descpanelfg" div
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.eq(2).css({visibility: 'hidden', zIndex: -1}).html(setting.closebutton + setting.longestdesc).end() //"descpanelhidden" hidden div to re-get height of panel after populating it with text
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.appendTo(setting.$descpanel)
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setting.$descinner=setting.$descpanel.find('div.descpanelfg')
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setting.panelheight=setting.$descinner.outerHeight()
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setting.$descpanel.css({height:setting.panelheight}).find('div').css({height:'100%'})
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if (setting.descreveal=="always"){ //create restore button
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setting.$restorebutton=$('<img class="restore" title="Restore Description" src="' + fadeSlideShow_descpanel.controls[1][0] +'" style="position:absolute;visibility:hidden;right:0;bottom:0;z-index:1002;width:'+fadeSlideShow_descpanel.controls[1][1]+'px;height:'+fadeSlideShow_descpanel.controls[1][2]+'px;cursor:pointer;cursor:hand" />')
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.appendTo(setting.$wrapperdiv)
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}
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},
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getCookie:function(Name){
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var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair
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if (document.cookie.match(re)) //if cookie found
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return document.cookie.match(re)[0].split("=")[1] //return its value
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return null
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},
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setCookie:function(name, value){
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document.cookie = name+"=" + value + ";path=/"
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}
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} |