Created
July 27, 2011 19:15
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A drawing toy using HTML5 canvas. Draw an abstract flower, and output the drawing to the page as a png image.
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| <!DOCTYPE html> | |
| <html> | |
| <!-- | |
| Created using JS Bin | |
| Source can be edited via /ecekaw/8/edit | |
| --> | |
| <head> | |
| <script class="jsbin" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script> | |
| <meta charset=utf-8 /> | |
| <title>Artsy</title> | |
| <!--[if IE]> | |
| <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script> | |
| <![endif]--> | |
| <style> | |
| article, aside, figure, footer, header, hgroup, | |
| menu, nav, section { display: block; } | |
| </style> | |
| </head> | |
| <body> | |
| <canvas id="canvas" width="320" height="356"></canvas> | |
| <br/> | |
| <button id="outputButton">output</button> | |
| <button id="clearButton">clear</button> | |
| <p/> | |
| <div id="output"></div> | |
| <script> | |
| $(function(){ | |
| var ctx = $('#canvas')[0].getContext("2d"); | |
| var WIDTH = $("#canvas").width(); | |
| var HEIGHT = $("#canvas").height(); | |
| var CENTER_Y = HEIGHT / 2; | |
| var CENTER_X = WIDTH / 2; | |
| var clear = (function clear () { | |
| ctx.save(); | |
| ctx.fillStyle = 'white'; | |
| ctx.fillRect(0, 0, WIDTH, HEIGHT); | |
| ctx.strokeRect(0.5, 0.5, WIDTH - 0.5, HEIGHT - 0.5); | |
| ctx.restore(); | |
| return clear; | |
| })(); | |
| var draw = function(x, y) { | |
| ctx.beginPath(); | |
| ctx.moveTo(CENTER_X, CENTER_Y); | |
| ctx.lineTo(x, y); | |
| ctx.stroke(); | |
| }; | |
| $('#canvas').mousemove(function(e) { | |
| var offset = $(this).offset(); | |
| var coords = {}; | |
| coords.x = e.clientX - $(this).offset().left; | |
| coords.y = e.clientY - $(this).offset().top; | |
| draw(coords.x, coords.y); | |
| }); | |
| $('#outputButton').click(function () { | |
| var img = $('#canvas')[0].toDataURL("image/png"); | |
| $('#output').prepend($('<img src="'+img+'"/><p/>')); | |
| }); | |
| $('#clearButton').click(function () { | |
| clear(); | |
| }); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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