正文
canvas时钟效果
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话不多说，直接上代码
<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>
<html xmlns=”http://www.w3.org/1999/xhtml”>
<head>
<meta http-equiv=”Content-Type” content=”text/html; charset=utf-8″ />
<title>时钟</title><script type=”text/javascript” src=”js/jquery-1.8.3.min.js”></script>
<script type=”text/javascript” src=”js/shizhong.js”></script><style type=”text/css”>
#myCanvas {
opacity: 0.8;
-webkit-animation: roll 3s;
animation: roll 3s;
}
@-webkit-keyframes roll {
from{-webkit-transform:rotate(360deg);opacity:0;}
to{-webkit-transform:rotate(0deg);opacity:0.8;}
}
@keyframes roll {
from{transform:rotate(360deg);opacity:0;}
to{transform:rotate(0deg);opacity:0.8;}
}
</style></head>
<body><br /><br /><div style=”width:150px;margin:0 auto;”>
<canvas id=”myCanvas” width=”150″ height=”150″></canvas>
</div><!– 时钟悬浮网页游动
<script>
var x = 50,y = 60;//图片距离顶部的位置
var xin = true, yin = true
var step = 1 //图片移动的步速 越高越快
var delay = 10 //图片移动延时 越高越慢
var obj=document.getElementById(“myCanvas”)
function float() {
var L=T=0
var R= document.documentElement.clientWidth-obj.offsetWidth //offsetHeight 则是网页内容实际高度
var B = document.documentElement.clientHeight-obj.offsetHeight // clientHeight 就是透过浏览器看内容的这个区域高度。
obj.style.left = x + document.documentElement.scrollLeft + “px”;
obj.style.top = y + document.documentElement.scrollTop + “px”;
x = x + step*(xin?1:-1)
if (x < L) { xin = true; x = L}
if (x > R){ xin = false; x = R}
y = y + step*(yin?1:-1)
if (y < T) { yin = true; y = T }
if (y > B) { yin = false; y = B }
}
var itl= setInterval(“float()”, delay)
obj.onmouseover=function(){clearInterval(itl)}
obj.onmouseout=function(){itl=setInterval(“float()”, delay)}
</script>
–></body>
</html>
shizhong.js内容
$(function(){
var iNow = 0;
var arr = [“#ffae00″,”black”];myClock();
myday();
setInterval(myClock,1000);//每一秒钟重绘一次
setInterval(myday,1000);
function myday(){
var a = new Array(“星期日”, “星期一”, “星期二”, “星期三”, “星期四”, “星期五”, “星期六”);
var week = new Date().getDay();
var dateDom=new Date();
var year=dateDom.getFullYear();
var month=dateDom.getMonth()+1;
var day=dateDom.getDate();
var mm=year+”-“+month+”-“+day;
var myCanvas = document.getElementById(“myCanvas”);
var cxt=myCanvas.getContext(“2d”);
cxt.font=”14px 黑体”;
//绘制实心字
cxt.fillStyle=”red”;//填充红色
cxt.fillText(mm,50,105);
for(var ind=0;ind<6;ind++){
if(week==ind){
var myCanvas = document.getElementById(“myCanvas”);
var cxt=myCanvas.getContext(“2d”);
cxt.font=”14px 黑体”;
//绘制实心字
cxt.strokeStyle=”red”;//填充红色
cxt.strokeText(a[ind],55,55);
}
}
}function myClock(){
//得到年月日
var myCanvas = document.getElementById(“myCanvas”);
var oC = myCanvas.getContext(“2d”);
//得到时分秒
var now = new Date(),
sec = now.getSeconds(),
min = now.getMinutes(),
hour = now.getHours();
hour = hour>=12 ? hour-12 : hour;iNow++;
iNow = iNow%2;oC.save();//save():保存当前环境的状态
//初始化画布
oC.clearRect(0,0,myCanvas.width,myCanvas.height);//clearRect:在给定的矩形内清除指定的像素
oC.translate(75,75);//translate:重新映射画布上的 (0,0) 位置
oC.scale(0.5,0.5);//scale:缩放当前绘图至更大或更小
oC.rotate(-Math.PI/2);//rotate:旋转当前绘图
// Math.PI: PI 属性就是 π，即圆的周长和它的直径之比
//白色背景
oC.save();
oC.fillStyle = “#ccc”;
oC.beginPath();//beginPath:起始一条路径，或重置当前路径
oC.arc(0,0,14+0,0,Math.PI*2,true);//arc:创建弧/曲线（用于创建圆形或部分圆）
oC.fill();//fill:填充当前绘图（路径）
oC.restore();//restore:返回之前保存过的路径状态和属性oC.strokeStyle = “#548B54”;//strokeStyle:设置或返回用于笔触的颜色、渐变或模式
oC.fillStyle = “black”;//fillStyle:设置或返回用于填充绘画的颜色、渐变或模式
oC.lineWidth = 4;//设置或返回当前的线条宽度
oC.lineCap = “round”; //设置或返回线条的结束端点样式//时针刻度
oC.save();
oC.beginPath();
for(var i=0; i<12; i++){
oC.moveTo(110,0);//把路径移动到画布中的指定点，不创建线条
oC.lineTo(120,0);//添加一个新点，然后在画布中创建从该点到最后指定点的线条
oC.rotate(Math.PI/6);//旋转当前绘图
}
oC.stroke();//绘制已定义的路径
oC.restore();//分针刻度
oC.save();
oC.fillStyle = “black”;
oC.lineWidth = 2;
oC.beginPath();
for(var i=0; i<60; i++){
if(i%5 != 0){
oC.moveTo(116,0);
oC.lineTo(120,0);
}
oC.rotate(Math.PI/30);
}
oC.stroke();
oC.restore();oC.save();
oC.rotate(Math.PI/2);
oC.font = “30px impact”;
//12点
oC.fillText(“12”,-15,-80);
oC.fillText(“1”,40,-75); //文本的 x 坐标位置,文本的 y 坐标位置
oC.fillText(“2”,80,-35);
//3点
oC.fillText(“3”,88,13);
//6点
oC.fillText(“6”,-8,104);
//9点
oC.fillText(“9”,-103,11);
oC.restore();//画时针
oC.save();
oC.strokeStyle = “#ff3300”;
oC.rotate((Math.PI/6)*hour+(Math.PI/360)*min+(Math.PI/21600)*sec);
oC.lineWidth = 8;
oC.beginPath();
oC.moveTo(-20,0);
oC.lineTo(60,0);
oC.stroke();
oC.restore();//画分针
oC.save();
oC.rotate((Math.PI/30)*min+(Math.PI/1800)*sec);
oC.strokeStyle = “#27A9E3”;
oC.lineWidth = 6;
oC.beginPath();
oC.moveTo(-28,0);
oC.lineTo(90,0);
oC.stroke();
oC.restore();//画秒针
/*oC.save();
oC.rotate(sec*Math.PI/30);
oC.strokeStyle = “#D40000”;
oC.lineWidth = 3;
oC.beginPath();
oC.moveTo(-30,0);
oC.lineTo(105,0);
oC.stroke();
oC.restore();*///风车秒针
oC.save();
oC.rotate(sec*Math.PI/30);oC.save();
oC.fillStyle = “#f23”;
oC.beginPath();
oC.arc(94,0,10,0,Math.PI,true);
oC.fill();
oC.restore();oC.save();
oC.rotate(Math.PI/2);
oC.fillStyle = “#ffae00”;
oC.beginPath();
oC.arc(10,-84,10,0,Math.PI,true);
oC.fill();
oC.restore();oC.save();
oC.fillStyle = “#27A9E3”;
oC.beginPath();
oC.arc(74,0,10,Math.PI,Math.PI*2,true);
oC.fill();
oC.restore();oC.save();
oC.rotate(Math.PI/2);
oC.fillStyle = “#0eaf52”;
oC.beginPath();
oC.arc(-10,-84,10,Math.PI,Math.PI*2,true);
oC.fill();
oC.restore();
oC.restore()
//风车秒针
//表框
oC.save();
oC.lineCap = “butt”;
oC.lineWidth = 16;
oC.save();
oC.strokeStyle = “#BBFFFF”;
oC.beginPath();
oC.arc(0,0,142,0,Math.PI*2,true);
oC.stroke();
oC.restore();oC.save();
oC.strokeStyle = “#C0FF3E”;
oC.beginPath();
oC.arc(0,0,142,0,Math.PI/iNow*5/3,true);
oC.stroke();
oC.restore();
oC.restore();//中心点
oC.save();
oC.fillStyle = “#fff”;
oC.beginPath();
oC.arc(0,0,4,0,Math.PI*2,true);
oC.fill();
oC.restore();oC.restore();
};});
