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              <div class="guid">
    <h1 class="title">Circle Slider</h1>
    <p class="description">
        <span class="bold">Drag</span> or <span class="bold">Select</span> an item
    </p>
</div>
<div class="slider">
    <div class="slider-inner">
        <div class="slider-origin">
            <div class="slider-item">1</div>
            <div class="slider-item">2</div>
            <div class="slider-item">3</div>
            <div class="slider-item">4</div>
            <div class="slider-item">5</div>
            <div class="slider-item">6</div>
            <div class="slider-item">7</div>
            <div class="slider-item">8</div>
            <div class="slider-item">9</div>
            <div class="slider-item">10</div>
            <div class="slider-item">11</div>
            <div class="slider-item">12</div>
            <div class="slider-item">13</div>
            <div class="slider-item">14</div>
            <div class="slider-item">15</div>
            <div class="slider-item">16</div>
            <div class="slider-item">17</div>
            <div class="slider-item">18</div>
            <div class="slider-item">19</div>
            <div class="slider-item">20</div>
            <div class="slider-item">21</div>
            <div class="slider-item">22</div>
            <div class="slider-item">23</div>
            <div class="slider-item">24</div>
            <div class="slider-item">25</div>
            <div class="slider-item">26</div>
            <div class="slider-item">27</div>
            <div class="slider-item">28</div>
            <div class="slider-item">29</div>
            <div class="slider-item">30</div>
        </div>
    </div>
</div>
            
          
!
            
              html, body{
    height: 100%;
    padding: 0;
    margin: 0;
    text-align: center;
}
.title{
    font-weight: 700;
    font-size: 55px;
    margin-bottom: 10px;
    color: #333;
}
.description{
    font-size: 21px;
    font-weight: 400;
    color: #888;
}
.bold{
    font-weight: 700;
}
.slider{
    padding: 50px 0;
}
.slider-origin{
    background-color: #bd2cbd;
    border-radius: 50%;
    /*margin-top: 20%;*/
    display: inline-block;
    position: relative;
}
.slider-inner{
    display: inline-block;
}
.slider-item{
    width: 74px;
    height: 100px;
    background-color: rgba(128,0,128,0.4);
    box-shadow: 0 0 3px 1px rgba(0,0,0,0.1);
    border-radius: 3px;
    position: absolute;
    bottom: 200%;
    left: 50%;
    margin-left: -37px;
		cursor: pointer;
    
    transform-origin: center 175%;
    -webkit-transform-origin: center 175%;
    -ms-transform-origin: center 175%;
    -moz-transform-origin: center 175%;
    
    transition: transform 0.5s;
    -webkit-transition: transform 0.5s;
    -ms-transition: transform 0.5s;
    -moz-transition: transform 0.5s;

    text-align: left;
    color: #fff;
    padding: 7px;
    box-sizing: border-box;

    -moz-user-select: -moz-none;
   -khtml-user-select: none;
   -webkit-user-select: none;

   /*
     Introduced in IE 10.
     See http://ie.microsoft.com/testdrive/HTML5/msUserSelect/
   */
   -ms-user-select: none;
   user-select: none;
}
.slider-item.active{
    background-color: purple;
		cursor: default;
}
.slider-item:not(.active):hover{
	background-color: #540554;
}
            
          
!
            
              $(document).ready(function(){

    // helpful variables
    var slider = $('.slider');
    var sliderInner = slider.find('.slider-inner');
    var sliderOrigin = slider.find('.slider-origin');
    var sliderItems = slider.find('.slider-item');
    var itemsLength = sliderItems.length;
    var calcDeg = 270 / itemsLength;
    var clickDown = false;
    var mouseMove = false;
    var moveFrom = null;
    var moveTo = null;
    var extraDeg = 0;
    var currentItem = sliderItems.eq(0);

    // slider origin width & height = half of item height
    sliderOrigin.width(sliderItems.outerHeight() / 2);
    sliderOrigin.height(sliderItems.outerHeight() / 2);
    
    // slider inner width & height = item height * 3.5
    sliderInner.width(sliderItems.outerHeight()*3.5);
    sliderInner.height(sliderItems.outerHeight()*3.5);

    var sliderInnerWidth = sliderInner.outerWidth();
    var sliderInnerOffset = sliderInner.offset();

    sliderOrigin.css('margin-top',(sliderInner.height() / 2) - (sliderOrigin.height() / 2));
    
    // calc rotation positioning
    function rotationPosition(exceptIndex){
        exceptIndex = exceptIndex | 0;
        var i = 1;
        sliderItems.each(function(e){
            var $this = $(this);
            extraDeg = exceptIndex > itemsLength/2? 360: 0;
            if(e === exceptIndex){
                $this.addClass('active').css('transform', 'rotate('+extraDeg+'deg)');
            }else{
                $this.css('transform', 'rotate('+((i*calcDeg)+45)+'deg)');
                i++;
            }
        });
    }rotationPosition();


    // click event on item
    var clickedItemIndex = null;
    function sliderItemsClickEvent(){

        sliderItems.mousedown(function(e){
            if(clickedItemIndex == null && e.which == 1){
                clickedItemIndex = $(this).index();
            }
        });
        sliderItems.mouseup(function(){
            var $this = $(this);
            if(clickedItemIndex === $this.index()){
                currentItem = $this;
                pushIndex($this.index());
            }
        });
    }sliderItemsClickEvent();

    // push index of the activated item
    function pushIndex(index){
        sliderItems.removeClass('active');
        rotationPosition(index);
    }

    // clickDown = true if mousedown on slider
    sliderInner.mousedown(function(e){
        clickDown = true;
        moveFrom = e.pageX;
    });


    // clickDown = false if mouseup on any place in the page
    $(document).mouseup(function(e){
        clickDown = false;
        setTimeout(function(){ clickedItemIndex = null; }, 505);
        // setTimeout(function(){clickDown = false;}, 505);
        if(mouseMove){
            mouseMove = false;
            moveto = e.pageX;
            swipe(moveFrom, moveto);
        }
    });


    // calc mouse move on sliderInner div
    sliderInner.mousemove(function(e){
        if(clickDown){
            if(!mouseMove){mouseMove = true;}
            var offsetX = e.pageX - sliderInnerOffset.left;
            var move = moveFrom - sliderInnerOffset.left;
            var motionDeg = ((offsetX - move)/sliderInnerWidth) * (calcDeg*2);
            extraDeg = currentItem.index() > itemsLength/2? 360:0; 
            sliderInner.find('.slider-item.active').css('transform', 'rotate('+(motionDeg+extraDeg)+'deg)');
        }
    });

    function swipe(from, to){
        var distance = Math.abs(from - to); // mouse move distance
        var rightDir = from < to;
        if(distance > sliderInnerWidth/4){
            navigate();
        }else{
            currentItem.css('transform', 'rotate('+(currentItem.index() > itemsLength/2? 360:0)+'deg)');
        }

        function navigate(){
            if(rightDir){
                var nextIndex = currentItem.next().index();
                pushIndex(nextIndex != -1? nextIndex:  0);
            }else{
                var prevIndex = currentItem.prev().index();
                pushIndex( prevIndex != -1? prevIndex:  sliderItems.length -1);
            }
            currentItem = sliderInner.find('.slider-item.active');
        }

    }
});
            
          
!
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