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              <div class="container">  
  <h1>Image Slider <small>jQuery plugin</small></h1>       
    
  <div id="image-slider">
    <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/211306/nature1.jpg">
    <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/211306/nature2.jpg">
    <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/211306/nature3.jpg">    
    <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/211306/nature4.jpg">    
    <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/211306/nature5.jpg">    
    <span><h1>First Slider<small>with custom theme</h1></small></span>      
  </div>     
                
  <div class="row">
    <div class="col-md-6">
      <h2>Usage:</h2>
<pre style="height: 300px;">
&lt;div id="image-slider"&gt;
   &lt;img src="path/photo1.jpg"&gt;
   &lt;img src="path/photo2.jpg"&gt;
   &lt;img src="path/photo3.jpg"&gt;
   &lt;span&gt;CUSTOM TEXT&lt;/span&gt;
&lt;/div&gt;
&lt;script&gt;
    $('#image-slider').imageSlider();
&lt;/script&gt;
</pre>            
    </div>
    <div class="col-md-6">
      <h2>Second slider <small>with different theme</small></h2>
      <div id="image-slider-2">
        <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/211306/oldtimer1.jpg">
        <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/211306/oldtimer2.jpg">
        <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/211306/oldtimer3.jpg">     
      </div>          
    </div>
  </div>
  
  <div class="row">
    <div class="col-md-6">
      <h2>Features</h2>              
      <ul>
        <li>Using JQuery fadeOut() effect</li>      
        <li>Manipulate div background-image property</li>
        <li>Shuffle photos (random order)</li>
        <li>Custom title on the slider</li>
        <li>Config delay and fadeOut speed</li>
        <li>Multiple instances in a page <span class="notify">NEW!</span></li>
        <li>Effects: FadeOut and Slide <span class="notify">NEW!</span></li>
        <li>Progressbar and (optional selectable) indicator <span class="notify">NEW!</span></li>
      </ul>  
      <h2>Plans</h2>
      <ul>
        <li>Stop sliding when the mouse cusor on the photo</li>
        <li>Title tag use as subtitle in the photo</li>
        <li>Contol slider programatically (positioning, stop/start slideshow)</li>
      </ul>
    </div>
    <div class="col-md-6">      
      <h2>Events</h2>
      <div id="eventlog" class="events">
      </div>
    </div>
  </div>
</div>
            
          
!
            
              body {
  background-color: #eee;  
}

h1 {
  color: black;
  font-family: "Trebuchet MS", Helvetica, sans-serif;
  margin-bottom: 15px;
  small {
    color: gray;
  }
}

h2 {
  color: black;
  margin-bottom: 15px;
  font-family: "Trebuchet MS", Helvetica, sans-serif;
  font-size: 2em;
}

ul {  
  font-family: "Trebuchet MS", Helvetica, sans-serif;
  color: #222;
}

span.notify {  
  color: darkred;    
  font-size: 1.2em;
}

.events {  
  height: 100px;
  padding: 10px;
  border: 1px solid #aaa;  
  background-color: #fafafa;
  font-family: consolas;
  color: #444;  
  font-size: 10px;
  overflow: auto;
  height: 120px;
  
  p {
    padding: 0;
    margin: 0;    
    font-height: 1em;
  }
}

/********************

/* original div */
#image-slider-frame {
  clear: both;
}

/* generated wrapper div */
#image-slider-1-wrap {
	height: 300px;
	width: 1000px;
	position: relative;  
  border: 4px solid white;
  box-shadow: 0px 0px 5px black;   
  overflow: hidden;
  
   /* generate first frame div */
  .frame-0 {
    position: absolute;
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
    z-index: 0;
    width: 100%;
    height: 100%;         
  }
  
  /* Generated third frame div (header text) */  
  .frame-1 {
    position: absolute;
    background-repeat: no-repeat;
    background-position: center center;
    background-size: 100% 100%;
    z-index: 1;
    width: 100%;
    height: 100%;
  }      
}

#image-slider-1-wrap .frame-text {
  z-index: 3;        
  position: absolute;        
  bottom: 10px;    
  width: 100%;                

  h1 {      
    text-align: center;
    font-weight: bold;
    color: #eec;
    font-size: 3em;	
    font-family: "Trebuchet MS", Helvetica, sans-serif;
    text-shadow: 0px 0px 10px rgba(0,0,0,.75);

    small {
      color: rgba(255,255,255,.5);
      font-size: 0.8em;
      margin-left: 10px;
    }
  }
}

// slider buttons: previous, next image and close button
#image-slider-1-wrap {
  button {
    &.btn-prev, 
    &.btn-next,
    &.btn-close {    
      z-index: 2;
      position:absolute;
      width: 30px;
      height: 30px;
      background: rgba(255,255,255,.3);
      border: none;  
      color: black;
      outline: 0;
    }

    &.btn-prev {
      top: 130px;    
      border: none;
      border-radius: 0px 5px 5px 0;
      color: black;
      
      &::after {
        font-family: FontAwesome;
         content:'\f053';
      }
    }

    &.btn-next {
      top: 130px;
      right: 0;   
      border-radius: 5px 0 0 5px; 
      
      &::after {
        font-family: FontAwesome;
        content:'\f054';
      }
    }

    &.btn-close {  
      right: 10px;
      top: 10px;  
      width: 20px;
      height: 20px;  
      padding-top: 0px;
      padding-left: 5px;
      
      &::after {        
         font-family: FontAwesome;
         content:'\f00d';            
      }    
    }      
  }     
  &:hover {
    button.btn-prev, 
    button.btn-next,
    button.btn-close {
      background: rgba(255,255,255,.85); 
    }
  }
}  

// progressbar
 #image-slider-1-wrap {
    .progress {
      z-index: 2;      
      position: absolute;              
      bottom: 5px;
      margin: 0;
      padding: 0;      
      width: 95%;
      margin-left: 2.5%;
      height: 5px;
      background-color: rgba(255,255,255,.3);
      cursor: pointer;
      
      .indicator {
        z-index: 3;
        background-color: white;
        height: 5px;        
        transition: all .2s ease-out,-webkit-transform .2s ease-out;
      }
    }
  }

/**
 ** IMAGE SLIDER 2 **
 **/

/* original div */
#image-slider-2 { 
	display: none;  
}

/* generated wrapper div */
#image-slider-2-wrap {  
	height: 300px;
	width: 400px;
	position: relative;    
  border: 4px solid #888;
  box-shadow: 0px 0px 5px black;   
  
    /* first frame */
  .frame-0 {
    position: absolute;
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
    z-index: 0;
    width: 100%;
    height: 100%;         
  }

  /* second frame */
  .frame-1 {
    position: absolute;
    background-repeat: no-repeat;
    background-position: center center;
    background-size: 100% 100%;
    z-index: 1;
    width: 100%;
    height: 100%;
  }
}

// close button
#image-slider-2-wrap {
  button {        
    &.btn-close {    
      z-index: 2;      
      position:absolute;
      right: 10px;
      top: 10px;  
      width: 25px;
      height: 25px;  
      background: none;
      border: 2px solid rgba(255,255,255,.5);        
      border-radius: 50% 50%;      
      color: rgba(255,255,255,.85);      
      padding: 0;  
      box-shadow: 1 1 5 rgba(0,0,0,.50);      
      text-shadow: 1 1 5 rgba(0,0,0,.50);      
      padding-left: 1px;
      padding-top: 0;   
      outline: 0;
             
      &::after {        
         font-family: FontAwesome;
         content:'\f00d';            
      }
    }   
    
    &.btn-close:hover {  
      background: none; 
      color: white;
    }        
  }       
}

  
 // progressbar and indicator
 #image-slider-2-wrap {
    .progress {
      z-index: 2;      
      position: absolute;        
      right: 3px;
      bottom: 3px;      
      margin: 0;
      padding: 0;      
      height: 50%;
      width: 9px;
      background: rgba(0,0,0,.5);
      
      .indicator {                
        background: rgba(255,255,255,.75);        
        width: 6px;
        margin-left: 2px;
        border: 0;        
        border-radius: 10px 10px;
        transition: all .2s ease-out,-webkit-transform .2s ease-out;        
      }
    }
  }
            
          
!
            
              $.fn.imageSlider = function(options) {
  "use strict";
  
  // default options
  var defaults = {    
    sliderId: 1,                // unique slider id
    effect: 'fadeout',          // effect "fadeout" or "slide"
    delay: 5000,                // an integer indicating the number of milliseconds to delay execution of the next item in the queue
    fadeOut: 3000,              // a string or number determining how long the animation will run
    shuffle: false,             // randomizes the order of the photos in the gallery
    navButtons: false,          // navigation disabled
    progressBar: false,         // progressbar disabled
    verticalProgressBar: false, // false: horizontal, true: vertical prograsbar
    slideShow: true,            // slideshow enabled
    selectWithProgressBar: true // if it is enabled you change active photo with the progressbar too
  }
      
  // technical variables
  var that;                // plugin's object pointer
  var $srcPlugin;          // original DOM element's jquery pointer
  var $desPlugin;          // destination DOM element's jquery pointer (this build with this blugin)
  var isInProgress=false;  // animation is in progress (and tilt the interaction until finish)
  var timer;               // slideshow's timer
          
  /**
   * Helper function: Randomize array element order in-place.
   * Using Durstenfeld shuffle algorithm.
   */
  this.shuffleArray = function(arr) {
    var i = arr.length, j, temp;
    if ( i == 0 ) return arr;
    while ( --i ) {
       j = Math.floor( Math.random() * ( i + 1 ) );
       temp = arr[i];
       arr[i] = arr[j];
       arr[j] = temp;
    }
    return arr;
  }
    
  /**
   * Load default config 
   **/
  this.loadDataFromConfig = function() {        
    that.opts = $.extend( {}, defaults, options );             
    that.sliderId  = that.opts['sliderId'];
    that.delay     = that.opts['delay'];
    that.duration  = that.opts['duration'];
    that.slideShow = that.opts['slideShow'];
  }
  
  /**
   * load images' urls from DOM
   */
  this.loadImages = function() {    
    var images = [];
    
    $srcPlugin.find('img').each(function() {
      images.push($(this).attr('src'));
    });          
    
    return images;
  }    
  
  /**
   * load data from original DOM
   *   - shuffle (random order) images (optional) 
   *   - open title
   */
  this.loadDataFromDOM = function() {        
    that.images = that.loadImages();      
    
    // random order
    if (that.opts['shuffle'] === true) {
      that.images = that.shuffleArray(that.images);  
    }
   
    that.idxLastImage = that.images.length-1;              
    
    that.title = $("#image-slider span").html() || '';                   
  }
  
  /**
   * Generate plugin's frame
   */
  this.createWrap = function() {
    that.$wrap = $('<div id="image-slider-'+that.sliderId+'-wrap"></div>');        
    that.$frame = [$('<div class="frame-0"></div>'), $('<div class="frame-1"></div>')];            
    var $frameText = $('<div class="frame-text">'+that.title+'</div>');        
    
    that.$wrap.append(that.$frame[0], that.$frame[1], $frameText);
    
    // init image sources in the slider divs    
    that.$frame[0].css('background-image', "url('"+that.images[0]+"')");
    that.$frame[1].css('background-image', "url('"+that.images[0]+"')");    
  }  
  
  /**
   * Add navigation
   *  - previous and next image button (optional)
   *  - close button (optional)
   */
  this.addNavigation = function() {
    // Add prev and next button
    if (that.opts.navButtons===true) {
      $('<button class="btn-prev"></button>').appendTo(that.$wrap);
      $('<button class="btn-next"></button>').appendTo(that.$wrap);                     
    }
    
    // add close button
    if (that.opts.onClose !== undefined) {
      $('<button class="btn-close"></button>').appendTo(that.$wrap);
    }       
  }
  
  /**
   * Add progressbar (optional)
   */
  this.addProgressBar = function() {     
    if (that.opts.progressBar===true) {      
      $('<div class="progress"><div class="indicator"></div></div>').appendTo(that.$wrap);                  
    }    
  }
  
  /**
   * Change photo with click on progressbar
   */
  this.clickProgressBar = function (e) {
    if (that.opts.selectWithProgressBar !== true || isInProgress) {          
      return 0;
    }
    
    if (that.opts.verticalProgressBar === true) {                        
      var percent = (100/that.$progressBar.height())*e.offsetY;    
    } else {
      var percent = (100/that.$progressBar.width())*e.offsetX;      
    }

    var idxImageOld = that.idxImage;
    that.idxImage = Math.floor(((that.idxLastImage+1)/100)*percent);

    if (idxImageOld != that.idxImage) { 
      var direction = that.idxImage < idxImageOld ? 'left' : 'right';
      that.slideImage(that.idxImage, direction);          
    }    
  }
  
  /**
   * Refresh progressbar's indicator
   */
  this.refreshIndicator = function() {
    var count = that.idxLastImage + 1;
    var unit =  (100 / count);
    var percent = unit * that.idxImage;    
    
    if (that.opts.verticalProgressBar === true) {            
      // vertival margin-top doesn't work with percent
      var percentByPixel = (that.$progressBar.height()/100)*percent;
      that.$indicator.height(unit+'%').css('margin-top', percentByPixel+'px');   
    } else {
      that.$indicator.width(unit+'%').css('margin-left', percent+'%');                 
    }
  }
  
  /**
   * Replace original DOM to generated HTML
   */
  this.replaceDOM = function() {  
    that.createWrap();        
    that.addNavigation();    
    that.addProgressBar();
         
    // replace original DOM with the generated
    $srcPlugin.after(that.$wrap);                 
    $srcPlugin.remove();     
        
    $desPlugin = $('#image-slider-'+that.sliderId+'-wrap');
    that.$progressBar = $desPlugin.find('.progress');    
    that.$indicator = $desPlugin.find('.indicator');     
    
    that.$progressBar.click(that.clickProgressBar);
  }
  
  /**
   * Close button trigger
   */
  this.closeTrigger = function() {     
    if (that.opts.onClose !== undefined) {
      $desPlugin.find('button.btn-close').on('click', function(e) {  
         that.opts.onClose.call($desPlugin, that.sliderId, that.idxImage);          
      });
    }      
  }
  
  /**
   * Slide trigger (when photo index change)
   */
  this.slideTrigger = function() {    
    if (that.opts.onSlide !== undefined) {      
       that.opts.onSlide.call($desPlugin, that.sliderId, that.idxImage);                
    }
  }        
  
  /**
   * Slide image (manual or automatic way)
   */
  this.slideImage = function(idx, direction) {    
    
    if (isInProgress) {
      return false;
    } else {
      isInProgress = true; 
    }        
        
    var $frame = that.$frame[that.idxFront]; // frame that you can see
    var $nextFrame = that.$frame[1-that.idxFront];  // the next frame that you can't see
    var nextImageUrl = that.images[that.idxImage];
    
    if (that.opts.effect !== 'slide') {
      // next photo send back and show
      $nextFrame
        .css('z-index', 0)    
        .css('background-image', "url('"+nextImageUrl+"')")
        .show();

      // actual photo send front and fadeout
      $frame
        .css('z-index', 1) 
        .stop()
        .fadeOut(that.duration, function() { 
              // change frame index
              that.idxFront = 1-that.idxFront;
              // trigger change photo
              that.slideTrigger();  
              isInProgress = false;
       });
     } else {
       // slide effect
       var width = $nextFrame.width();
                     
       $nextFrame.css('background-image', "url('"+nextImageUrl+"')");
       $nextFrame.css('left', direction=='left'?width:-width);
       
       $frame.animate({left: direction=='left'?-width:width}, that.opts.duration);
       $nextFrame.animate({left: 0}, that.opts.duration, function() {
          // change frame index
          that.idxFront = 1-that.idxFront;
          isInProgress = false;
          that.slideTrigger();  
       });
              
     }
       
      that.refreshIndicator();          
  }
  
  /**
   * Adding triggers to the next and the prev buttons
   */
  this.addNavigationTriggers = function() {
    this.cmdPrevButton = $desPlugin.find('button.btn-prev');
    this.cmdNextButton = $desPlugin.find('button.btn-next');
            
    this.cmdPrevButton.on('click', function() {            
      that.idxImage = that.idxImage < 1 ? that.idxLastImage : that.idxImage-1;               
      that.slideImage(that.idxImage, 'left');              
    });
        
    this.cmdNextButton.on('click', function() {      
      that.idxImage = that.idxImage > that.idxLastImage-1 ? 0 : that.idxImage+1;      
      that.slideImage(that.idxImage, 'right');
    });    
  }
  
  /**
   * Run slideshow with timer
   */
  this.runSlideShow = function() {
    if (isInProgress) {
      setTimeout(that.runSlideShow, that.delay);
      return false;
    }  
    
    that.idxImage = that.idxImage > that.idxLastImage-1 ? 0 : that.idxImage+1;      
    that.slideImage(that.idxImage, 'right');    
    setTimeout(that.runSlideShow, that.delay);
  }
  
  
  /**
   * Start plugin
   */
  this.init = function() {          
    
    that = this; // pointer to class properties    
    $srcPlugin = $(this); // pointer to original DOM
      
    that.idxImage = 0; // Active photo index                 
    that.idxFront = 1; // Active frame index  
    
    that.loadDataFromConfig();     
    that.loadDataFromDOM();    
    
    that.replaceDOM(); 
    
    that.closeTrigger(); 
    
    that.addNavigationTriggers();
                        
    // start timer
    if (that.slideShow) {
      that.runSlideShow();
    } else {    
      that.refreshIndicator();
    }
  }
  
  this.init();   
}  


/*
 *
 * USAGE EXAMPLES
 *
 */


/**
 * Show event on the eventlog (event box)
 */
function showEvent(message, sliderId, idxImage, color) {    
  $('#eventlog').prepend('<p style="color: '+color+'">'+(new Date).toLocaleTimeString()+': '+message+' [sliderId: '+sliderId+' idxImage:'+idxImage+']</p>');
}

// first slider
$('#image-slider').imageSlider({     
    delay: 5000,        // delay in milisecond 
    effect: 'slide',    // slider's effect
    duration: 1000,     // fade in milisecond    
    navButtons: true,   // enable left and right navigation
    progressBar: true,  // show progressbar      
    onSlide: function(sliderId, idxImage) {
      showEvent('Slide first slider.', sliderId, idxImage, '#448');   
    }
});

// second slider
$('#image-slider-2').imageSlider({  
  sliderId: 2, // unique id (from second div)  
  delay: 500,
  duration: 4000,  
  shuffle: true,
  navButtons: true,
  progressBar: true,
  verticalProgressBar: true,
  //selectWithProgressBar: false,
  onClose: function(sliderId, idxImage) {      
    showEvent('Close second slider.', sliderId, idxImage, '#844'); 
    alert('Second slider: Close Trigger');
  },  
  onSlide: function(sliderId, idxImage) {
      showEvent('Slide second slider.', sliderId, idxImage, '#844');   
    }
});
            
          
!
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