Network Security Internet Technology Development Database Servers Mobile Phone Android Software Apple Software Computer Software News IT Information

In addition to Weibo, there is also WeChat

Please pay attention

WeChat public account

Shulou

How to use HTML5 to realize a moving graphic clock

2025-01-17 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Development >

Share

Shulou(Shulou.com)06/03 Report--

This article introduces the knowledge of "how to use HTML5 to achieve a moving graphic clock". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Using HTML5 to make clock

The code is as follows:

Html5 clock

Var Clock = function (canvas, options) {

This.canvas = canvas

This.ctx = this.canvas.getContext ("2d")

This.options = options

}

Clock.prototype = {

Constructor: Clock

DrawCircle: function () {

Var ctx = this.ctx

Ctx.strokeStyle = "black"

Ctx.arc (this.canvas.width / 2, this.canvas.height / 2,50,0,2 * Math.PI, false)

Ctx.stroke ()

}

DrawNum: function () {

Var ctx = this.ctx

Var angle = Math.PI * 2 / 12

For (var I = 1; I 12) {

Hour = hour 12

}

Minute = date.getMinutes ()

Second = date.getSeconds ()

Var b = minute * Math.PI / 30

Var c = second * Math.PI / 30

Var a = hour * Math.PI / 6 + Math.PI / 6 * minute / 60

Var minuteAngle = Math.PI * 2 / 3600

Var secondAngle = Math.PI * 2 / 60

Var hourAngle = Math.PI * 2 / 12 / 3600

Ctx.beginPath ()

Ctx.save ()

Ctx.translate (that.canvas.width / 2, that.canvas.height / 2)

Ctx.arc (0,0,3,0,2 * Math.PI, false)

Ctx.fill ()

Ctx.closePath ()

Ctx.beginPath ()

A + = hourAngle

Ctx.rotate (a)

Ctx.fillRect (- 2,-22, 4, 30)

Ctx.closePath ()

Ctx.beginPath ()

B + = minuteAngle

Ctx.rotate (b-a)

Ctx.fillRect (- 1.5,26,3,35)

Ctx.closePath ()

Ctx.beginPath ()

C + = secondAngle

Ctx.rotate (c-b)

Ctx.fillRect (- 1,-30, 2, 40)

Ctx.closePath ()

Ctx.restore ()

}

RePaint: function () {

This.drawPointer ()

This.drawCircle ()

This.drawNum ()

}

Tik: function () {

Var that = this

Var ctx = this.ctx

This.rePaint ()

Window.timer = setInterval (function () {

Ctx.clearRect (0,0, that.canvas.width, that.canvas.height)

That.rePaint ()

}, 1000)

}

}

Var options

Var clock = new Clock (document.getElementById ("canvas"), options)

Clock.tik ()

After saving, use the browser to run, you can see the circular clock moving around, let's try it.

This is the end of the introduction to "how to use HTML5 to implement a moving graphical clock". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.

Views: 0

*The comments in the above article only represent the author's personal views and do not represent the views and positions of this website. If you have more insights, please feel free to contribute and share.

Share To

Development

Wechat

© 2024 shulou.com SLNews company. All rights reserved.

12
Report