001.xhtml - mozsearch

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<?xml version="1.0" encoding="utf-8"?>

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<title>Removing canvas element during drag and drop</title>

<style type="text/css">

div

  {height:100px;

  width:100px;

  padding:20px;

  background-color:silver;}

</style>

<script type="application/ecmascript">

function addImage(event)

  {var c = document.createElement('img');

  c.setAttribute('src',event.dataTransfer.getData('text/uri-list').replace(/\r\n$/,''));

  document.querySelector('div').appendChild(c);}

function start(event)

  {event.dataTransfer.effectAllowed = 'copy';

  event.dataTransfer.setData('text/uri-list', document.querySelector('canvas').toDataURL('image/png'));

  document.querySelector('p').removeChild(canvas);}

</script>

</head>

<body>

<p>

  <canvas width="100" height="100" draggable="true" ondragstart="start(event)">Canvas</canvas>

</p>

<p>Drag canvas pattern to the silver box below and drop it. It should be copied to the box once you drop it there.</p>

<div ondragover="return false" ondrop="addImage(event)"/>

<script type="application/ecmascript">

var canvas = document.querySelector('canvas'),

c = canvas.getContext('2d');

for(var x = 0; x != 50; x++)

  {c.fillStyle = (x%2 == 0)?'navy':'white';

  c.beginPath();

  c.moveTo(x,x);

  c.lineTo(100-x,x);

  c.lineTo(100-x,100-x);

  c.lineTo(x,100-x);

  c.closePath();

  c.fill();}

</script>

</body>

</html>