HTML5 Canvas Shape Tango with KineticJS

Instructions: drag and drop the shapes and press the "Tango" button to make the shapes move. refresh the page to generate new random shapes.

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Code Editor

<!DOCTYPE HTML>
<html>
  <head>
    <style>
      body {
        margin: 0px;
        padding: 0px;
      }
      canvas {
        border: 1px solid #9C9898;
      }
      #tango {
        position: absolute;
        top: 10px;
        left: 10px;
        padding: 10px;
      }
      #container {
        background-image: url("http://www.html5canvastutorials.com/demos/assets/blue-background.jpg");
        display: inline-block;
        overflow: hidden;
        height: 365px;
        width: 580px;
      }
    </style>
  </head>
  <body onmousedown="return false;">
    <div id="container"></div>
    <input type="button" id="tango" value="Tango!">
    <script src="http://d3lp1msu2r81bx.cloudfront.net/kjs/js/lib/kinetic-v4.5.1.min.js"></script>
    <script defer="defer">
      var colors = ['red', 'orange', 'yellow', 'green', 'blue', 'purple'];
          
      function getRandomColor() {
          return colors[Math.round(Math.random() * 5)];
      }
      
      function tango(layer) {
        var color = Kinetic.Util.getRGB(getRandomColor());
                  
        for(var n = 0; n < layer.getChildren().length; n++) {
          var shape = layer.getChildren()[n];
          var stage = shape.getStage();
          
          new Kinetic.Tween({
            node: shape, 
            duration: 1,
            x: Math.random() * stage.getWidth(), 
            y: Math.random() * stage.getHeight(), 
            rotation: Math.random() * Math.PI * 2, 
            radius: Math.random() * 100 + 20,
            opacity: Math.random(),
            easing: Kinetic.Easings.StrongEaseOut,
            fillR: color.r,
            fillG: color.g,
            fillB: color.b
          }).play();
        }
      }
      var stage = new Kinetic.Stage({
        container: 'container',
        width: 578,
        height: 363
      });

var layer = new Kinetic.Layer();

for(var n = 0; n < 10; n++) {
        var shape = new Kinetic.RegularPolygon({
          x: Math.random() * stage.getWidth(),
          y: Math.random() * stage.getHeight(),
          sides: Math.ceil(Math.random() * 5 + 3),
          radius: Math.random() * 100 + 20,
          fill: getRandomColor(),
          stroke: 'black',
          opacity: Math.random(),
          strokeWidth: 4,
          draggable: true
        });

layer.add(shape);
      }

stage.add(layer);

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

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Modified on November 4th, 2012 by Eric Rowell