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CanvasClock.html
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<!DOCTYPE html>
<html lang="en-us">
<head>
<meta charset="UTF-8">
<title>Canvasclock by weicracker</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style type="text/css" media="screen">
body{
width: 200px;
height: 200px;
/* 如果浏览器不支持渐变，使用图像作为背景 */
background: url(gradient.jpg);
/* Webkit: Safari 4-5, Chrome 1-9 */
background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#ff6600), to(#339900));
/* Webkit: Safari 5.1+, Chrome 10+ */
background: -webkit-linear-gradient(top, #ff6600, #339900);
/* Firefox 3.6+ */
background: -moz-linear-gradient(top, #ff6600, #339900);
/* Opera 11.10+ */
background: -o-linear-gradient(top, #ff6600, #339900);
/* IE 10 */
background: -ms-linear-gradient(top, #ff6600, #339900);
/* IE < 10 */
/* 注意：这一行必须写在最后 */
FILTER: progid: DXImageTransform.Microsoft.Gradient(startColorStr=#ff6600, endColorStr=#339900);
}
canvas {
position: absolute;
left: 40%;
top: 20%;
}
</style>
</head>
<body>
<section class="page-header">
<h1 class="project-name">Canvasclock</h1>
<h2 class="project-tagline">Canvas绘制时钟效果展示</h2>
</section>
<canvas id="canvas" width="500" height="500"></canvas>
</body>
<script>
var canvas = document.getElementById("canvas");
var cxt = canvas.getContext("2d");
cxt.translate(250, 250);
// 表盘装饰
var timer = setInterval(function () {
auto();
}, 1000);
cxt.save();
function auto() {
cxt.clearRect(-250, -250, 500, 500);
cxt.beginPath();
cxt.fillStyle = "skyblue";
cxt.arc(0, 0, 220, 0, 2 * Math.PI, true);
cxt.fill();
cxt.beginPath();
cxt.fillStyle = "#fff";
cxt.arc(0, 0, 200, 0, 2 * Math.PI, true);
cxt.fill();
// 表盘刻度
for (var i = 0; i < 12; i++) {
cxt.beginPath();
cxt.rotate(Math.PI / 6);
cxt.fillStyle = "#90f";
cxt.arc(180, 0, 5, 0, 2 * Math.PI, true);
cxt.fill();
}
for (var j = 0; j < 60; j++) {
cxt.beginPath();
cxt.rotate(Math.PI / 30);
cxt.fillStyle = "#c778fc";
cxt.arc(180, 0, 2, 0, 2 * Math.PI, true);
cxt.fill();
}
cxt.beginPath();
cxt.fillStyle = "#666";
cxt.arc(0, 0, 5, 0, 2 * Math.PI, true);
cxt.fill();
//时间显示
var oDate = new Date();
var oHour = oDate.getHours();
var oMinute = oDate.getMinutes();
var oSenond = oDate.getSeconds();
var oMonth = oDate.getMonth() + 1;
var oDay = oDate.getDate();
oMonth = dbtime(oMonth);
oDay = dbtime(oDay);
console.log(oMonth + "--" + oDay)
cxt.strokeRect(50, -10, 75, 20);
cxt.strokeStyle = "skyblue";
cxt.font = "14px 微软雅黑";
cxt.strokeText(oMonth + "月" + oDay + "日", 55, 5);
oHour = oHour >= 12 ? oHour - 12 : oHour;
//时针
cxt.save();
cxt.rotate(-Math.PI / 2);
cxt.beginPath();
cxt.fillStyle = "#666";
cxt.fill();
cxt.beginPath();
cxt.rotate((oHour + oMinute / 60 + oSenond / 3600) * (Math.PI / 6));
cxt.moveTo(-27, 0);
cxt.bezierCurveTo(30, -8, 60, -8, 80, 0);
cxt.bezierCurveTo(60, 8, 30, 8, -27, 0);
cxt.fill();
cxt.restore();
//分针
cxt.save();
cxt.beginPath();
cxt.rotate(-Math.PI / 2);
cxt.fillStyle = "#666";
cxt.fill();
cxt.beginPath();
cxt.rotate(Math.PI / 30 * oMinute);
cxt.moveTo(-27, 0);
cxt.bezierCurveTo(30, -5, 60, -5, 145, 0);
cxt.bezierCurveTo(60, 5, 30, 5, -27, 0);
cxt.fill();
//秒针
cxt.restore();
cxt.save();
cxt.beginPath();
cxt.rotate(-Math.PI / 2);
cxt.rotate(Math.PI / 30 * oSenond);
cxt.strokeStyle = "#777";
cxt.fillStyle = "#777";
cxt.lineWidth = 2;
cxt.arc(-30, 0, 4, 0, Math.PI * 2, true);
cxt.fill();
cxt.beginPath();
cxt.moveTo(-27, 0);
cxt.lineTo(165, 0);
cxt.stroke();
cxt.restore();
}
function dbtime(num) {
return num > 9 ? num : "0" + num;
}
</script>
</html>