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Cameron Kaiser
39 lines
1.3 KiB
HTML
39 lines
1.3 KiB
HTML
<?xml version="1.0" encoding="utf-8"?>
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>Reload during canvas drag and drop roundtrip</title>
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<style type="text/css">
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img
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{margin:0 2px;}
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</style>
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<script type="application/ecmascript">
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function addImage(event)
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{var c = document.createElement('img');
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c.setAttribute('src',event.dataTransfer.getData('text/uri-list').replace(/\r\n$/,''));
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document.querySelector('p').appendChild(c);}
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function start(event)
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{event.dataTransfer.effectAllowed = 'copy';
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event.dataTransfer.setData('text/uri-list', document.querySelector('canvas').toDataURL('image/png'));
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window.location.reload();}
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</script>
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</head>
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<body>
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<p>
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<canvas width="100" height="100" draggable="true" ondragstart="start(event)" ondragenter="event.preventDefault()" ondragover="return false" ondrop="addImage(event)">Canvas</canvas>
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</p>
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<p>Drag canvas pattern around page and then drag it back and drop on itself. It should be duplicated once you drop it.</p>
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<script type="application/ecmascript">
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var canvas = document.querySelector('canvas'),
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c = canvas.getContext('2d');
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for(var x = 0; x != 50; x++)
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{c.fillStyle = (x%2 == 0)?'navy':'white';
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c.beginPath();
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c.moveTo(x,x);
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c.lineTo(100-x,x);
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c.lineTo(100-x,100-x);
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c.lineTo(x,100-x);
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c.closePath();
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c.fill();}
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</script>
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</body>
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</html> |