<link href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.1.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<div class="container">
<div class="row">
<h2>TEST: Ken Burns Slider</h2>
<div class="col-md-2">
Sidebar content
</div>
<div class="col-md-10">
Body content
<div id="kenburns-slideshow"></div>
<div id="kenburns-description">
<h1 id="status">Loading Images..</h1>
<h1 id="slide-title"></h1>
<h1 class="title"><a href="http://www.github.com/toymakerlabs/kenburns/" target="blank">Kenburns.js
</a></h1>
<p>Kenburns.js is a lightweight and flexible Jquery gallery plugin that loads images and features an animated, pan-and-zoom, Ken Burns style effect. Grab the source from my <a href="http://www.github.com/toymakerlabs/kenburns/" target="blank"> Github</a></p>
</div>
</div>
</div>
</div>
body {
margin-top:44;
}
/* KENBURNS STYLES
-------------------------------------------------------*/
/* kenburns_slideshow is the wrapper div.
Our list of Images scrolls inside of this frame
To compute the minimum frame size needed:;
image width * scale
image height * scale
if the image size is smaller than the frame size,
gaps may appear. If image sizes are exactly the same,
the images will fade over one another and not move.
*/
#kenburns-slideshow {
position: relative;
width:600px;
height: 360px;
background-color:#292929;
border:22px solid #191919;
z-index: 1;
overflow: hidden;
}
/* The plugin wraps the images in div.kb-slide. This
allows me to run separate animations simultaneously. */
.kb-slide{
position: absolute;
z-index: 1;
opacity: 0;
}
/* I used position relative here because IE8
didnt like the opacity when the img was set to absolute*
translate3d(000) kicks them into HW acceleration, and
backface-visibility gives some performance boosts.*/
.kb-slide img{
position: relative;
-webkit-transform: translate3d(0,0,0)
-moz-transform: translate3d(0,0,0);
-webkit-backface-visibility: hidden;
-moz-backface-visibility: hidden;
}
/* If the script encounters an image that hasnt loaded,
it pops up a little loading wheel. I used a little CSS3
but you could also use a gif to better handle ie8*/
.loader {
width:32px;
height:32px;
top:6px;
left:550px;
border:5px solid rgba(128,128,128,0.9);
opacity:.9;
border-top:5px solid rgba(0,0,0,0);
border-left:5px dotted rgba(0,0,0,0);
border-radius:32px;
-moz-animation:spin .7s infinite linear;
-webkit-animation:spin .7s infinite linear;
}
@-moz-keyframes spin {
0% { -moz-transform:rotate(0deg); }
100% { -moz-transform:rotate(360deg); }
}
@-moz-keyframes spinoff {
0% { -moz-transform:rotate(0deg); }
100% { -moz-transform:rotate(-360deg); }
}
@-webkit-keyframes spin {
0% { -webkit-transform:rotate(0deg); }
100% { -webkit-transform:rotate(360deg); }
}
@-webkit-keyframes spinoff {
0% { -webkit-transform:rotate(0deg); }
100% { -webkit-transform:rotate(-360deg); }
}
#kenburns-description{
width: 600px;
background-color:#191919;
color:#999;
padding:0 22px 22px 22px;
}
#kenburns-description p{
margin:0;
padding:0;
line-height: 18px;
font-size:12px;
}
#kenburns-description a{
color:white;
text-decoration: none;
}
#kenburns-description a:hover{
color:green;
text-decoration: none;
}
#kenburns-description a:visited{
color:white;
}
.title {
clear: left;
margin:0;
padding:15px 0 0 0;
}
#slide-title{
font-size: 12px;
float:left;
color:#7085B3;
}
#status{
color:#333;
font-size: 12px;
float:right;
clear: right;
}
var titles = ["Epic Day at Refugio",
"Colors of Spring",
"First Flowers",
"Magic Hour at Sands Beach",
"Coal Oil Point",
"Hope Ranch Views"];
$(document).ready(function() {
$('#kenburns-slideshow').Kenburns({
images: [
"http://www.toymakerlabs.com/kenburns/images/image0.jpg",
"http://www.toymakerlabs.com/kenburns/images/image1.jpg",
"http://www.toymakerlabs.com/kenburns/images/image2.jpg",
"http://www.toymakerlabs.com/kenburns/images/image3.jpg",
"http://www.toymakerlabs.com/kenburns/images/image4.jpg",
"http://www.toymakerlabs.com/kenburns/images/image5.jpg",
],
scale:0.75,
duration:8000,
fadeSpeed:0,
ease3d:'cubic-bezier(0.445, 0.050, 0.550, 0.950)',
onSlideComplete: function(){
$('#slide-title').html(titles[this.getSlideIndex()]);
},
onLoadingComplete: function(){
$('#status').html("Loading Complete");
}
});
});
/*
* Jquery Kenburns Image Gallery
* Original author: John [at] Toymakerlabs
* Further changes, comments: [at]Toymakerlabs
* Licensed under the MIT license
*
* Copyright (c) 2013 ToymakerLabs
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
* and associated documentation files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge, publish, distribute,
* sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions: The above copyright notice and this
* permission notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
;(function ( $, window, document, undefined ) {
/* Plugin Parameters
------------------------------------------------------------------------------------------------- */
var pluginName = 'Kenburns',
defaults = {
images:[],
duration:400,
fadeSpeed:500,
scale:1,
ease3d:'cubic-bezier(.81, 0, .26, 1)',
onLoadingComplete:function(){},
onSlideComplete:function(){},
onListComplete:function(){},
getSlideIndex:function(){
return currentSlide;
}
};
var imagesObj = {};
var currentSlide = 0;
function Plugin( element, options ) {
this.element = element;
this.options = $.extend( {}, defaults, options) ;
this._defaults = defaults;
this._name = pluginName;
this.maxSlides = this.options.images.length;
this.init();
}
/* 1. Initialization
------------------------------------------------------------------------------------------------- */
/**
* Init
* Initial setup - dermines width, height, and adds the loading icon.
*/
Plugin.prototype.init = function () {
var list = this.options.images;
var that = this;
this.width = $(this.element).width();
this.height = $(this.element).height();
this.has3d = has3DTransforms();
for (i in list) {
imagesObj["image"+i] = {};
imagesObj["image"+i].loaded = false;
this.attachImage(list[i], "image"+i , i);
}
var loader = $('<div/>');
loader.addClass('loader');
loader.css({'position':'absolute','z-index':10000});
$(this.element).prepend(loader);
};
/* 2. Loading and Setup
------------------------------------------------------------------------------------------------- */
/**
* Attach image
* creates a wrapper div for the image along with the image tag. The reason for the additional
* wrapper is that we are transitioning multiple properties at the same time: scale, position, and
* opacity. But we want opacity to finish first. This function also determines if the browser
* has 3d transform capabilities and initializes the starting CSS values.
*/
Plugin.prototype.attachImage = function(url,alt_text,index) {
var that = this;
//put the image in an empty div to separate the animation effects of fading and moving
var wrapper = $('<div/>');
wrapper.attr('class','kb-slide img-responsive');
wrapper.css({'opacity':0});
var img = $("<img />");
img.attr('src', url);
img.attr('alt', alt_text);
wrapper.html(img);
//First check if the browser supports 3D transitions, initialize the CSS accordingly
if(this.has3d) {
img.css({'-webkit-transform-origin':'left top'});
img.css({'-moz-transform-origin':'left top'});
img.css({'-webkit-transform':'scale('+that.options.scale+') translate3d(0,0,0)'});
img.css({'-moz-transform':'scale('+that.options.scale+') translate3d(0,0,0)'});
}
//Switch the transition to the 3d version if it does exist
this.doTransition = (this.has3d)?this.transition3d:this.transition;
//set up the image OBJ parameters - used to track loading and initial dimensions
img.load(function() {
imagesObj["image"+index].element = this;
imagesObj["image"+index].loaded = true;
imagesObj["image"+index].width = $(this).width();
imagesObj["image"+index].width = $(this).height();
that.insertAt(index,wrapper);
that.resume(index);
});
}
/**
* Resume
* Resume will continue the transition after the stalled image loads
* it also fires the complete action when the series of images finishes loading
*/
Plugin.prototype.resume = function(index){
//first image has loaded
if(index == 0) {
this.startTransition(0);
$(this.element).find('.loader').hide();
}
//if the next image hasnt loaded yet, but the transition has started,
// this will match the image index to the image holding the transition.
// it will then resume the transition.
if(index == this.holdup) {
$('#status').html("");
$(this.element).find('.loader').hide();
this.startTransition(this.holdup);
}
//if the last image in the set has loaded, add the images in order
if(this.checkLoadProgress() == true) {
//reset the opacities and z indexes except the last and first images
$(this.element).find('.stalled').each(function(){
$(this).css({'opacity':1,'z-index':1});
$(this).removeClass('stalled');
});
//fire the complete thing
this.options.onLoadingComplete();
}
}
//if any of the slides are not loaded, the set has not finished loading.
Plugin.prototype.checkLoadProgress = function() {
var imagesLoaded = true;
for(i=0;i<this.maxSlides;i++){
if (imagesObj["image"+i].loaded == false){
imagesLoaded = false;
}
}
return imagesLoaded;
}
/**
* Wait
* Stops the transition interval, shows the loader and
* applies the stalled class to the visible image.
*/
Plugin.prototype.wait = function() {
clearInterval(this.interval);
$('#status').html("loading");
$(this.element).find('.loader').show();
var image = imagesObj["image"+(currentSlide-1)].element;
$(image).parent().stop(true,true);
$(image).parent().addClass('stalled');
}
/* 3. Transitions and Movement
------------------------------------------------------------------------------------------------- */
/**
* startTransition
* Begins the Gallery Transition and tracks the current slide
* Also manages loading - if the interval encounters a slide
* that has not loaded, the transition pauses.
*/
Plugin.prototype.startTransition = function(start_index) {
var that = this;
currentSlide = start_index; //current slide
that.doTransition();
this.interval = setInterval(function(){
//Advance the current slide
if(currentSlide < that.maxSlides-1){
currentSlide++;
}else {
currentSlide = 0;
}
//Check if the next slide is loaded. If not, wait.
if(imagesObj["image"+currentSlide].loaded == false){
that.holdup = currentSlide;
that.wait();
//if the next slide is loaded, go ahead and do the transition.
}else {
that.doTransition();
}
},this.options.duration);
}
/**
* chooseCorner
* This function chooses a random start corner and a random end corner
* that is different from the start. This gives a random direction effect
* it returns coordinates used by the transition functions.
*/
Plugin.prototype.chooseCorner = function() {
var scale = this.options.scale;
var image = imagesObj["image"+currentSlide].element;
var sw = image.width;
var sh = image.height;
//alert(this.width);
var corners = [
{x:0,y:0},
{x:1,y:0},
{x:0,y:1},
{x:1,y:1}
];
//Pick the first corner. Remove it from the array
var choice = Math.floor(Math.random()*4);
var start = corners[choice];
//Pick the second corner from the subset
corners.splice(choice,1);
var end = corners[Math.floor(Math.random()*3)];
//build the new coordinates from the chosen coordinates
var coordinates = {
startX: start.x * (this.width - sw*scale) ,
startY: start.y * (this.height - sh*scale),
endX: end.x * (this.width - sw),
endY: end.y * (this.height - sh)
}
return coordinates;
}
/**
* Transiton3D
* Transition3d Function works by setting the webkit and moz translate3d properties. These
* are hardware accellerated and give a very smooth animation. Since only one animation
* can be applied at a time, I wrapped the images in a div. The shorter fade is applied to
* the parent, while the translation and scaling is applied to the image.
*/
Plugin.prototype.transition3d = function () {
var that = this;
var scale = this.options.scale;
var image = imagesObj["image"+currentSlide].element;
var position = this.chooseCorner();
//First clear any existing transition
$(image).css({'-webkit-transition':'none'});
$(image).css({'-moz-transition':'none'});
$(image).css({'-webkit-transform':'scale('+scale+') translate3d('+position.startX+'px,'+position.startY+'px,0)'});
$(image).css({'-moz-transform':'scale('+scale+') translate3d('+position.startX+'px,'+position.startY+'px,0)'});
//Set the wrapper to fully transparent and start it's animation
$(image).parent().css({'opacity':0,'z-index':'3'});
$(image).parent().animate({'opacity':1},that.options.fadeSpeed);
//Add the transition back in
$(image).css({'-webkit-transition':'-webkit-transform '+(that.options.duration+that.options.fadeSpeed)+'ms '+that.options.ease3d});
$(image).css({'-moz-transition':'-moz-transform '+(that.options.duration+that.options.fadeSpeed)+'ms '+that.options.ease3d});
//set the end position and scale, which fires the transition
$(image).css({'-webkit-transform':'scale(1) translate3d('+position.endX+'px,'+position.endY+'px,0)'});
$(image).css({'-moz-transform':'scale(1) translate3d('+position.endX+'px,'+position.endY+'px,0)'});
this.transitionOut();
this.options.onSlideComplete();
}
/**
* Transition
* The regular JQuery animation function. Sets the currentSlide initial scale and position to
* the value from chooseCorner before triggering the animation. It starts the image moving to
* the new position, starts the fade on the wrapper, and delays the fade out animation. Adding
* fadeSpeed to duration gave me a nice crossfade so the image continues to move as it fades out
* rather than just stopping.
*/
Plugin.prototype.transition = function() {
var that = this;
var scale = this.options.scale;
var image = imagesObj["image"+currentSlide].element;
var sw = $(image).width();
var sh = $(image).height();
var position = this.chooseCorner();
$(image).css({'left':position.startX,'top':position.startY,'width':sw*(scale),'height':sh*(scale)});
$(image).animate({'left':position.endX,'top':position.endY,'width':sw,'height':sh}, that.options.duration + that.options.fadeSpeed);
$(image).parent().css({'opacity':0,'z-index':3});
$(image).parent().animate({'opacity':1},that.options.fadeSpeed);
this.transitionOut();
this.options.onSlideComplete();
}
Plugin.prototype.transitionOut = function() {
var that = this;
var image = imagesObj["image"+currentSlide].element;
$(image).parent().delay(that.options.duration).animate({'opacity':0},that.options.fadeSpeed, function(){
$(this).css({'z-index':1});
});
}
/* 4. Utility Functions
------------------------------------------------------------------------------------------------- */
/**
* has3DTransforms
* Tests the browser to determine support for Webkit and Moz Transforms
* Creates an element, translates the element, and tests the values. If the
* values return true, the browser supports 3D transformations.
*/
function has3DTransforms() {
var el = document.createElement('p'),
has3d,
transforms = {
'WebkitTransform':'-webkit-transform',
'MozTransform':'-moz-transform',
};
document.body.insertBefore(el, null);
for (var t in transforms) {
if (el.style[t] !== undefined) {
el.style[t] = "translate3d(1px,1px,1px)";
has3d = window.getComputedStyle(el).getPropertyValue(transforms[t]);
}
}
document.body.removeChild(el);
return (has3d !== undefined && has3d.length > 0 && has3d !== "none");
}
/**
* insertAt
* Utility function that inserts objects at a specific index
* Used to maintain the order of images as they are loaded and
* added to the DOM
*/
Plugin.prototype.insertAt = function (index, element) {
var lastIndex = $(this.element).children().size();
if (index < 0) {
index = Math.max(0, lastIndex + 1 + index);
}
var imgWrapper = $(this.element).append(element);
if (index < lastIndex) {
$(this.element).children().eq(index).before($(this.element).children().last());
}
}
$.fn[pluginName] = function ( options ) {
return this.each(function () {
if (!$.data(this, 'plugin_' + pluginName)) {
$.data(this, 'plugin_' + pluginName,
new Plugin( this, options ));
}
});
}
})( jQuery, window, document );
