Created
November 5, 2009 01:35
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Minimalist painting in HTML5 canvas + Javascript.
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script type="text/javascript"> | |
| function draw() { | |
| var canvas = document.getElementById("canvas"); | |
| var ctx = canvas.getContext("2d"); | |
| ctx.fillStyle = "black"; | |
| ctx.beginPath(); | |
| var x; | |
| var y; | |
| canvas.onmousedown = function(e) { | |
| x = e.clientX; | |
| y = e.clientY; | |
| ctx.moveTo(x, y); | |
| } | |
| canvas.onmouseup = function(e) { | |
| x = null; | |
| y = null; | |
| } | |
| canvas.onmousemove = function(e) { | |
| if (x == null || y == null) { | |
| return; | |
| } | |
| x = e.clientX; | |
| y = e.clientY; | |
| x -= canvas.offsetLeft; | |
| y -= canvas.offsetTop; | |
| ctx.lineTo(x, y); | |
| ctx.stroke(); | |
| ctx.moveTo(x, y); | |
| } | |
| }; | |
| </script> | |
| <title></title> | |
| </head> | |
| <body onload="draw();"> | |
| <canvas id="canvas" width="300" height="300" style="border: 1px solid black;"></canvas> | |
| </body> | |
| </html> |
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