html5 canvas js(数字时钟)实例代码
发布于 2017-07-04 10:55:48 | 99 次阅读 | 评论: 0 | 来源: 网友投递
这里有新鲜出炉的Javascript教程，程序狗速度看过来！
JavaScript客户端脚本语言
Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言，主要目的是为了解决服务器端语言，比如Perl，遗留的速度问题，为客户提供更流畅的浏览效果。
这篇文章主要介绍了html5 canvas js(数字时钟)实例代码，有需要的朋友可以参考一下
<!doctype html>
<html>
<head>
<title>canvas dClock</title>
</head>
<body>
<canvas id = "clock" width = "500px" height = "200px">
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</canvas>
<script type = "text/javascript">
var clock = document.getElementById("clock");
var cxt = clock.getContext("2d"); //显示数字时钟
function showTime(m, n) {
cxt.clearRect(0, 0, 500, 500);
var now = new Date;
var hour = now.getHours();
var min = now.getMinutes();
var sec = now.getSeconds();
var msec = now.getMilliseconds();
hour = hour >= 10 ? hour : "0" + hour;
min = min >= 10 ? min : "0" + min;
sec = sec >= 10 ? sec : "0" + sec;
msec = (msec >= 10 && msec < 100) ? ("0" + msec) : (msec >= 0 && msec < 10) ? ("00" + msec) : msec;
bdigital(m, n, hour);
bdigital(m + 160, n, min);
bdigital(m + 320, n, sec);
//tdigital(m + 480, n, msec);
//三位数的显示
function tdigital(x, y, num) {
var ge = num % 10;
var shi = (parseInt(num / 10)) % 10;
var bai = parseInt((parseInt(num / 10)) / 10) % 10;
digital(x, y, bai);
digital(x + 70, y, shi);
digital(x + 140, y, ge);
}
//两位数的显示
function bdigital(x, y, num) {
var ge = num % 10;
var shi = (parseInt(num / 10)) % 10;
digital(x, y, shi);
digital(x + 70, y, ge);
}
//画：
//小时与分钟之间
cxt.lineWidth = 5;
cxt.strokeStyle = "#000";
cxt.fillStyle = "#000";
cxt.beginPath();
cxt.arc(m + 140, n + 80, 3, 0, 360, false);
cxt.fill();
cxt.closePath();
cxt.stroke();
cxt.lineWidth = 5;
cxt.strokeStyle = "#000";
cxt.fillStyle = "#000";
cxt.beginPath();
cxt.arc(m + 140, n + 100, 3, 0, 360, false);
cxt.fill();
cxt.closePath();
cxt.stroke();
//分钟与秒之间
cxt.lineWidth = 5;
cxt.strokeStyle = "#000";
cxt.fillStyle = "#000";
cxt.beginPath();
cxt.arc(m + 300, n + 80, 3, 0, 360, false);
cxt.fill();
cxt.closePath();
cxt.stroke();
cxt.lineWidth = 5;
cxt.strokeStyle = "#000";
cxt.fillStyle = "#000";
cxt.beginPath();
cxt.arc(m + 300, n + 100, 3, 0, 360, false);
cxt.fill();
cxt.closePath();
cxt.stroke();
//秒与毫秒之间一个.
// cxt.lineWidth = 5;
// cxt.strokeStyle = "#000";
// cxt.fillStyle = "#000";
// cxt.beginPath();
// cxt.arc(m + 460, n + 100, 3, 0, 360, false);
// cxt.fill();
// cxt.closePath();
// cxt.stroke();
}
//显示一位数字
function digital(x, y, num) {
//设置风格
cxt.lineWidth = 5;
cxt.strokeStyle = "#000";
//a
function a() {
cxt.beginPath();
cxt.moveTo(x, y);
cxt.lineTo(x + 50, y);
cxt.closePath();
cxt.stroke();
}
//b
function b() {
cxt.beginPath();
cxt.moveTo(x + 55, y + 5);
cxt.lineTo(x + 55, y + 55);
cxt.closePath();
cxt.stroke();
}
//c
function c() {
cxt.beginPath();
cxt.moveTo(x + 55, y + 60);
cxt.lineTo(x + 55, y + 110);
cxt.closePath();
cxt.stroke();
}
//d
function d() {
cxt.beginPath();
cxt.moveTo(x + 50, y + 115);
cxt.lineTo(x, y + 115);
cxt.closePath();
cxt.stroke();
}
//e
function e() {
cxt.beginPath();
cxt.moveTo(x - 5, y + 110);
cxt.lineTo(x - 5, y + 60);
cxt.closePath();
cxt.stroke();
}
//f
function f() {
cxt.beginPath();
cxt.moveTo(x - 5, y + 55);
cxt.lineTo(x - 5, y + 5);
cxt.closePath();
cxt.stroke();
}
//g
function g() {
cxt.beginPath();
cxt.moveTo(x, y + 57.5);
cxt.lineTo(x + 50, y + 57.5);
cxt.closePath();
cxt.stroke();
}
//0
function zero() {
a(); b(); c(); d(); e(); f();
}
//1
function one() {
b(); c();
}
//2
function two() {
a(); b(); d(); e(); g();
}
//3
function three() {
a(); b(); c(); d(); g();
}
//4
function four() {
b(); c(); f(); g();
}
//5
function five() {
a(); c(); d(); f(); g();
}
//6
function six() {
a(); c(); d(); e(); f(); g();
}
//7
function seven() {
a(); b(); c();
}
//8
function eight() {
a(); b(); c(); d(); e(); f(); g();
}
//9
function nine() {
a(); b(); c(); d(); f(); g();
}
//数字n
function number(n) {
switch (n) {
case 0: zero(); break;
case 1: one(); break;
case 2: two(); break;
case 3: three(); break;
case 4: four(); break;
case 5: five(); break;
case 6: six(); break;
case 7: seven(); break;
case 8: eight(); break;
case 9: nine(); break;
}
}
number(num);
}
showTime(1, 45);
setInterval("showTime(1,45)", 1000);
</script>
</body>
</html>