HTML5 Canvas Stop Animation with KineticJS

To stop an animation with KineticJS, we can use the stop() method. To restart the animation, we can again call the start().

Instructions:Click on "Start" to start the animation and "Stop" to stop the animation.

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<!DOCTYPE HTML>
<html>
  <head>
    <style>
      body {
        margin: 0px;
        padding: 0px;
      }
      #buttons {
        position: absolute;
        top: 5px;
        left: 10px;
      }
      #buttons > input {
        padding: 10px;
        display: block;
        margin-top: 5px;
      }
    </style>
  </head>
  <body>
    <div id="container"></div>
    <div id="buttons">
      <input type="button" id="start" value="Start">
      <input type="button" id="stop" value="Stop">
    </div>
    <script src="http://d3lp1msu2r81bx.cloudfront.net/kjs/js/lib/kinetic-v4.5.2.min.js"></script>
    <script defer="defer">
      var stage = new Kinetic.Stage({
        container: 'container',
        width: 578,
        height: 200
      });
      var layer = new Kinetic.Layer();

var hexagon = new Kinetic.RegularPolygon({
        x: stage.getWidth() / 2,
        y: stage.getHeight() / 2,
        sides: 6,
        radius: 70,
        fill: 'red',
        stroke: 'black',
        strokeWidth: 4
      });

layer.add(hexagon);
      stage.add(layer);

var amplitude = 150;
      // in ms
      var period = 2000;
      var centerX = stage.getWidth() / 2;

var anim = new Kinetic.Animation(function(frame) {
        hexagon.setX(amplitude * Math.sin(frame.time * 2 * Math.PI / period) + centerX);
      }, layer);

document.getElementById('start').addEventListener('click', function() {
        anim.start();
      }, false);
      
      document.getElementById('stop').addEventListener('click', function() {
        anim.stop();
      }, false);
    </script>
  </body>
</html>

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Modified on April 9th, 2013 by Eric Rowell