Circular Card Slider/Rotator With jQuery And CSS3

Circular Card Slider/Rotator With jQuery And CSS3
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License: MIT
   

A jQuery and CSS/CSS3 powered circular slider that allows you to pick a card from a deck of cards arranged in a circle.

How to use it:

1. Add as many cards to the slider.

<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>
  </div>
</div>

2. Apply styles to the card slider.

.slider-origin {
  background-color: #bd2cbd;
  border-radius: 50%;
  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;
  -webkit-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.slider-item.active {
  background-color: purple;
  cursor: default;
}

.slider-item:not(.active):hover {
  background-color: #540554;
}

3. Load the latest jQuery JavaScript library at the end of the document.

<script src="/path/to/cdn/jquery.min.js"></script>

4. Add the following JS snippets after jQuery. That's it.

$(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');
    }
  }
});

This awesome jQuery plugin is developed by mahmoudzohdi. For more Advanced Usages, please check the demo page or visit the official website.