mirror of
https://gitflic.ru/project/openide/openide.git
synced 2026-04-19 13:02:30 +07:00
92 lines
2.4 KiB
HTML
92 lines
2.4 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=620">
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<title>HTML5 Demo: Canvas</title>
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<!--<link rel="stylesheet" href="/css/html5demos.css" type="text/css">-->
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</head><body>
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<section id="wrapper">
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<header>
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<h1>Canvas</h1>
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</header>
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<article><canvas width="300" height="100"></canvas></article>
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<script>
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buildSpinner({ x : 50, y : 50, size : 20, degrees : 30 });
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function buildSpinner(data) {
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var canvas = document.createElement('canvas');
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canvas.height = 100;
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canvas.width = 300;
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document.getElementsByTagName('article')[0].appendChild(canvas);
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var ctx = canvas.getContext("2d"),
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i = 0, degrees = data.degrees, loops = 0, degreesList = [];
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for (i = 0; i < degrees; i++) {
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degreesList.push(i);
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}
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// reset
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i = 0;
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// so I can kill it later
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window.canvasTimer = setInterval(draw, 1000/degrees);
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function reset() {
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ctx.clearRect(0,0,100,100); // clear canvas
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var left = degreesList.slice(0, 1);
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var right = degreesList.slice(1, degreesList.length);
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degreesList = right.concat(left);
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}
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function draw() {
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var c, s, e;
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var d = 0;
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if (i == 0) {
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reset();
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}
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ctx.save();
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d = degreesList[i];
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c = Math.floor(255/degrees*i);
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ctx.strokeStyle = 'rgb(' + c + ', ' + c + ', ' + c + ')';
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ctx.lineWidth = data.size;
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ctx.beginPath();
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s = Math.floor(360/degrees*(d));
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e = Math.floor(360/degrees*(d+1)) - 1;
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ctx.arc(data.x, data.y, data.size, (Math.PI/180)*s, (Math.PI/180)*e, false);
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ctx.stroke();
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ctx.restore();
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i++;
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if (i >= degrees) {
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i = 0;
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}
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}
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}
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</script>
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<footer><a href="/">HTML5 demos</a>/<a id="built" href="http://twitter.com/rem">@rem built this</a></footer>
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</section>
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<a href="http://github.com/remy/html5demos"><img style="position: absolute; top: 0pt; left: 0pt; border: 0pt none;" src="http://s3.amazonaws.com/github/ribbons/forkme_left_darkblue_121621.png" alt="Fork me on GitHub"></a>
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<script>
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var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
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document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
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</script><script src="http://www.google-analytics.com/ga.js" type="text/javascript"></script>
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<script>
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try {
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var pageTracker = _gat._getTracker("UA-1656750-18");
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pageTracker._trackPageview();
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} catch(err) {}</script>
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</body>
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</html>
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