equalizer/test.html at master · burmisha/equalizer · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>ШРИ 2014 ЕКБ - Эквалайзер</title>
    <script src="http://yastatic.net/jquery/1.11.1/jquery.js"></script>
    <style>
      .equalizer-wrapper {
          float:left; margin: 0 20px 20px 0;
      }
      .equalizer {
          overflow: hidden;
          border:1px solid #ddd;
      }
      .equalizer.small {
          width: 100px;
          height: 100px;
      }
      .equalizer.normal {
          width: 200px;
          height: 200px;
      }
      .equalizer.big {
          width: 300px;
          height: 300px;
      }
      span {
          transition: height 0.5s linear;
      }
    </style>
    <script>
      var k = true;
      timeout = 500; // synced with css
      function setEqualizer(currentValue, i, a) {
        selector = currentValue;
        colWidth = 5;
          if (!colWidth) {
              colWidth = 1;
          }
          $(selector).css({
              verticalAlign: 'bottom',
              lineHeight: $(selector).height() + 'px'
          });

          var colQuantity = Math.ceil($(selector).width()/colWidth);
          var cols = new Array(colQuantity);
          for (var i = 0; i < cols.length; i++) {
              var span = $('<span/>').appendTo(selector);
              span.css({
                  verticalAlign: 'bottom',
                  display: 'inline-block',

                  fontSize: 0,
                  lineHeight: 0,

                  width: colWidth,
                  background: 'pink',
                  borderTop: '2px solid red'
              });
          }
      }

      function get_height(random, maxValue) {
        if (random) {
         return Math.round(maxValue * Math.random())
        } else {
          return maxValue/2;
        };
      }

      function run_equalizer (selector) {
        $(selector + ' span').each(function (i) {
          var colHeight = get_height(k, $(selector).height());
          $(this).height(colHeight);
        });
      }

      equalizers = ["#eq_1 .equalizer", '#eq_2 .equalizer', '#eq_3 .equalizer'];

      window.onload = function () {
          equalizers.forEach(setEqualizer);
      }

      window.setInterval(function() {
          equalizers.forEach(run_equalizer);
          k = ! k;
        },
        timeout
      );

    </script>
  </head>
  <body>
    <h1>Equalizers</h1>
    <div id="eq_1" class="equalizer-wrapper">
      <h2>First</h2>
      <div class="equalizer small"></div>
    </div>
    <div id="eq_2" class="equalizer-wrapper">
      <h2>Second</h2>
      <div class="equalizer normal"></div>
    </div>
    <div id="eq_3" class="equalizer-wrapper">
      <h2>Third</h2>
      <div class="equalizer big"></div>
    </div>
  </body>
</html>