动态效果点此下载用浏览器打开观看。
本作Github地址：https://github.com/horn19782016/12MaximClock
图例：
![[Canvas]新版箴言钟表](https://image.shishitao.com:8440/aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTYyNDc1LzIwMTkwMy8xNjI0NzUtMjAxOTAzMDQxOTM1NDUwNTUtMTU5NTQzNDI4Ny5wbmc%3D.png?w=700&webp=1 "[Canvas]新版箴言钟表")
代码：
<!DOCTYPE html>
<html lang="utf-8">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<head>
<title>钟表 2019年3月4日19点30分 by:逆火狂飙 horn19782016@163.com</title>
</head>
<body onload="draw()">
<canvas id="myCanvus" width="400px" height="400px" style="border:0px dashed black;">
出现文字表示你的浏览器不支持HTML5
</canvas>
</body>
</html>
<script type="text/javascript">
<!--
function draw(){
var canvas=document.getElementById('myCanvus');
canvas.width=400;
canvas.height=400;
context=canvas.getContext('2d');
context.translate(200,200);
clock=new Clock(200);
clock.init();
animate();
};
var context;
var clock;
function animate(){
context.clearRect(-200,-200,400,400);// 清屏
clock.paintBg(context);
clock.paintScale(context);
clock.paintPointers(context);
if(true){
window.requestAnimationFrame(animate);
}
}
// 钟表类
function Clock(radius){
this.radius=radius;
this.img;
this.init=function(){
this.img=new Image();
this.img.src="bg.jpg";
}
// 画背景
this.paintBg=function(ctx){
ctx.drawImage(this.img,0,0,400,400,-200,-200,400,400);
ctx.fillStyle="red";
var width = ctx.canvas.width;
var height = ctx.canvas.height;
var BL = width / 200;
var r=this.radius;
ctx.save();//保存一下最开始时钟的环境
ctx.beginPath();
ctx.lineWidth = 13.8 * BL;//线要 乘上 比例
ctx.arc(0, 0, r - ctx.lineWidth / 2, 2 * Math.PI, false);//乘上比例
ctx.strokeStyle = "#000080";
ctx.stroke();
ctx.fillStyle="white";
var hourNumber = [3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 1, 2];
ctx.font = 18 * BL + 'px Arial';//字体也有乘比例 字符串拼接
ctx.textAlign = 'center';
ctx.textBaseline = 'middle';
hourNumber.forEach(function (number, i) {
var rad = 2 * Math.PI / 12 * i;
var x = Math.cos(rad) * (r - 30 * BL);
var y = Math.sin(rad) * (r - 30 * BL);
ctx.fillText(number, x, y);
});
for (var i = 0; i < 60; i++) {
var rad = 2 * Math.PI / 60 * i;
var x = Math.cos(rad) * (r - 18 * BL);
var y = Math.sin(rad) * (r - 18 * BL);
ctx.beginPath();
if (i % 5 == 0) {
ctx.fillStyle = '#800080';
ctx.arc(x, y, 2 * BL, 0, 2 * Math.PI, false);
} else {
ctx.fillStyle = '#c0c0c0';
ctx.arc(x, y, 2 * BL, 0, 2 * Math.PI, false);
}
ctx.fill();
}
ctx.restore();
};
// 画汉字
this.paintScale=function(ctx){
var arr=["富强","*","文明","和谐","*","平等","公正","法治","爱国","敬业","诚信","友善"];
var offset=16;
ctx.save();
ctx.rotate(getRad(-94.5));
for(var i=0;i<60;i++){
var degree=i*6;
var x=(this.radius-offset)*Math.cos(getRad(degree));
var y=(this.radius-offset)*Math.sin(getRad(degree));
if((i % 5)==0){
ctx.save();
var x1=(this.radius-20)*Math.cos(getRad(degree));
var y1=(this.radius-20)*Math.sin(getRad(degree));
ctx.translate(x1,y1);
ctx.rotate(getRad(degree+96));
ctx.font="bold 16px 宋体";
ctx.fillStyle='white';
ctx.fillText(arr[i/5],0,0);
ctx.restore();
}
}
ctx.restore();
};
// 画指针
this.paintPointers=function(ctx){
var date = new Date();
var hour=date.getHours();
var minute=date.getMinutes();
var second=date.getSeconds();
ctx.font="bold 12px 宋体";
ctx.fillStyle="white";
ctx.fillText(hour+":"+minute+":"+second,-20,-100);
var angleS=second*6;
var angleM=minute*6;
var angleH=hour*30+angleM/360*30;
var width = ctx.canvas.width;
var height = ctx.canvas.height;
var BL = width / 200;
context.save();
context.rotate(getRad(-90));
var x,y;
// 画时针
x=(this.radius-60)*Math.cos(getRad(angleH));
y=(this.radius-60)*Math.sin(getRad(angleH));
ctx.strokeStyle = "white";
ctx.lineWidth = 3 * BL;//定义指针的宽
ctx.lineCap = 'round';//指针顶部为弧
ctx.beginPath();
ctx.moveTo(-x/8, -y/8);
ctx.lineTo(x,y);
ctx.stroke();
ctx.closePath();
// 画分针
x=(this.radius-45)*Math.cos(getRad(angleM));
y=(this.radius-45)*Math.sin(getRad(angleM));
ctx.strokeStyle = "white";
ctx.lineWidth = 2 * BL;//定义指针的宽
ctx.lineCap = 'round';//指针顶部为弧
ctx.beginPath();
ctx.moveTo(-x/8, -y/8);
ctx.lineTo(x,y);
ctx.stroke();
ctx.closePath();
context.restore();
// 画秒针
ctx.save();
ctx.lineWidth=0.5;
ctx.strokeStyle = "black";
ctx.beginPath();
var r=this.radius;
ctx.rotate(getRad(angleS));
ctx.moveTo(-2 * BL, 20 * BL);//画出一个秒针 x轴-2 y轴20
ctx.lineTo(2 * BL, 20 * BL);
ctx.lineTo(1, -r + 18 * BL);
ctx.lineTo(-1, -r + 18 * BL);
ctx.fill();
ctx.stroke();
ctx.closePath();
ctx.restore();
};
}
// 常规函数:角度得到弧度
function getRad(degree){
return degree/180*Math.PI;
}
// 常规函数:得到颜色
function getColor(index){
if(index==0){
return "green";
}else if(index==1){
return "silver";
}else if(index==2){
return "lime";
}else if(index==3){
return "gray";
}else if(index==4){
return "white";
}else if(index==5){
return "yellow";
}else if(index==6){
return "maroon";
}else if(index==7){
return "navy";
}else if(index==8){
return "red";
}else if(index==9){
return "blue";
}else if(index==10){
return "purple";
}else if(index==11){
return "teal";
}else if(index==12){
return "fuchsia";
}else if(index==13){
return "aqua";
}else if(index==14){
return "black";
}
}
//-->
</script>
2019年3月4日19点36分