目标: 在 CodePen.io 上做一个类似于 http://codepen.io/FreeCodeCamp/full/VemPZX 的 APP.
规则 #1: 代码是开源的，你可以借鉴，但请不要抄袭。
规则 #2: 可以使用你喜爱的任何库来定制属于你自己的风格，实现下面的功能.
功能: 可以启动一个 25 分钟的番茄钟, 计时器将在 25 分钟后停止.
功能: 可以重置番茄钟的状态以便启动下一次计时.
功能: 可以为每个番茄钟自定义时长.
在简书上不少关于干货的文章都有介绍过番茄工作法，即设定固定的学习时间，在这段时间内心无旁骛的学习，再休息相应的时间，休息时间结束后继续学习。这就是番茄工作法，劳逸结合。
这边用angularjs的方式实现番茄工作法计时器的小实例：
- session流逝的时间用绿颜色填充
- break流逝的时间用红色填充
- 单击计时器可以暂停计时器
- 暂停状态才可以修改session和break的值，否则不可以修改
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>angularJS实例-番茄钟</title>
<style type="text/css">
@import url(https://fonts.googleapis.com/css?family=Pacifico|Open+Sans:300);
*{margin: 0;font-family:Open Sans,Arial; }
html,body,main{height: 100%;overflow: hidden;background: #333333;}
h1{display: block;background: #333333;margin:0 auto;color: white;text-align: center;font-family: 'Pacifico';font-size: 5em;}
header{display: flex;justify-content: center;text-align: center;margin: 0 auto;color: #ffffff;text-transform: uppercase;padding: 20px;}
header .session{font-size: .8rem;display: flex;}
header .session .breakCtrl,header .session .sessionCtrl{display: inline;padding-left: 30px;padding-right: 30px;}
header .session .minus,header .session .plus{background: #333333;color: #fff;border: none;cursor: pointer;font-size: 2rem;outline: none;}
header .session .time{font-size: 2.5rem;padding-left: 10px;padding-right: 10px;}
section{background: #333333;height: 100%;color: #fff;}
section .title{text-align: center;line-height: 180px;font-size: 0.8em;}
section .timer{margin:0 auto;text-align: center;width: 300px;height: 300px;font-size: 4em;border:2px solid #99cc00;border-radius: 50%;cursor: pointer;position: relative;z-index: 20;overflow: hidden;}
section .timer:before{content: '';position:absolute;top: 0;bottom: 0;left: 0;right: 0;border-radius: 50%;z-index: 2;border: 4px solid #333333;}
section .fill{content: '';position: absolute;background: #99cc00;bottom: 0;right: 0;left: 0;z-index: -1;}
</style>
<script src="https://cdn.bootcss.com/angular.js/1.4.6/angular.min.js"></script>
</head>
<body>
<h1>FreeCodeCamp</h1>
<main ng-app="PomodoroApp" ng-controller="MainCtrl">
<header>
<div class="session">
<!-- break length控制器 -->
<div class="breakCtrl">
<p>break length</p>
<button class="minus" ng-click="breakLengthChange(-1)">-</button><span class="time">{{breakLength}}</span>
<button class="plus" ng-click="breakLengthChange(1)">+</button>
</div>
<!-- session length控制器 -->
<div class="sessionCtrl">
<p>session length</p>
<button class="minus" ng-click="sessionLengthChange(-1)">-</button><span class="time">{{sessionLength}}</span>
<button class="plus" bg-click="sessionLengthChange(1)">+</button>
</div>
</div>
</header>
<section ng-click="toggleTimer()">
<div class="timer">
<p class="title">{{sessionName}}</p>
<p>{{timeLeft}}</p><span class="fill" ng-style="{'height':fillHeight,'background':fillColor}"></span>
</div>
</section>
</main>
</body>
<script type="text/javascript">
var app = angular.module('PomodoroApp',[]); //angularjs模块初始化
app.controller('MainCtrl',function($scope,$interval){
$scope.breakLength = 5; //breaklength初始化值为5 休息时间
$scope.sessionLength = 25; //sessionlength初始化值为25 工作时间
$scope.timeLeft = $scope.sessionLength; //剩余时间为sessionlength的长度
$scope.fillHeight = '0%'; //一开始的填充高度为0
$scope.sessionName = 'Session'; //计时器的名字为session 可以自己随便定义
$scope.currentTotal;
var runTimer = false; //标志是否在计时的布尔值
var secs = 60 * $scope.sessionLength; //将分钟转换成秒
$scope.originalTime = $scope.sessionLength; //初始设置的session长度
//将时间转换成时分秒的显示形式
function secondsToHms(d){
d = Number(d);
var h = Math.floor(d/3600);
var m = Math.floor(d%3600/60);
var s = Math.floor(d%3600%60);
return((h>0?h+":"+(m<10?"0":""):"")+m+":"+(s<10?"0":"")+s);;
}
//Change default session length 改变sessionlength的长度
$scope.sessionLengthChange = function(time){
if(!runTimer){ //当处于非运行状态的时候，可以对原来设置的session大小进行加减
if($scope.sessionName === 'Session'){
$scope.sessionLength += time;
if($scope.sessionLength < 1){
$scope.sessionLength = 1;
}
$scope.timeLeft = $scope.sessionLength;
$scope.originalTime = $scope.sessionLength;
secs = 60*$scope.sessionLength;
}
}
}
//Change default break length 改变breaklength的长度
$scope.breakLengthChange = function(time){
if(!runTimer){
$scope.breakLength += time;
if($scope.breakLength<1){
$scope.breakLength = 1;
}
if($scope.sessionName === 'Break!'){
$scope.timeLeft = $scope.breakLength;
$scope.originalTime = $scope.breakLength;
secs = 60 * $scope.breakLength;
}
}
}
$scope.toggleTimer = function(){
if(!runTimer){ //如果正在运行中
if($scope.currentName == 'Session'){
$scope.currentLength = $scope.sessionLength;
}else{
$scope.currentLength = $scope.breakLength;
}
updateTimer();
runTimer = $interval(updateTimer,1000); //每秒更新一下时间
}else{
$interval.cancel(runTimer); //取消runTimer，暂停
runTimer = false;
}
}
function updateTimer(){
secs -= 1; //以1s为单位进行时间更新
if(secs <0){
//countdown is finished
//Play audio
// Play audio
// var wav = 'http://www.oringz.com/oringz-uploads/sounds-917-communication-channel.mp3';
// var audio = new Audio(wav);
// audio.play();
//toggle break an session
$scope.fillColor = '#333333';
if($scope.sessionName === 'Break!'){
$scope.sessionName = 'Session';
$scope.currentLength = $scope.sessionLength;
$scope.timeLeft = 60 * $scope.sessionLength;
$scope.originalTime = $scope.sessionLength;
secs = 60 * $scope.sessionLength;
}else{
$scope.sessionName = 'Break!';
$scope.currentLength = $scope.breakLength;
$scope.timeLeft = 60 * $scope.breakLength;
$scope.originalTime = $scope.breakLength;
secs = 60 * $scope.breakLength;
}
}else{
if($scope.sessionName === 'Break!'){
$scope.fillColor = '#ff4444';
}else{
$scope.fillColor = '#99cc00';
}
$scope.timeLeft = secondsToHms(secs);
var denom = 60 * $scope.originalTime;
var perc = Math.abs((secs / denom) * 100 -100);
$scope.fillHeight = perc + '%'; //计算已经流逝的时间占总时间的百分比
console.log($scope.fillHeight);
}
}
});
</script>
</html>
session时间流逝.gif
break时间流逝.gif
代码github地址：https://github.com/Iris-mao/css-tricks/tree/master/Pomodoro-Clock
