127 lines
2.4 KiB
JavaScript
127 lines
2.4 KiB
JavaScript
/**
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* 定时器
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* @class Timer
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* @constructor
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* @param {String} id 定时器的唯一标识
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* @param {Number} delay 初次运行的延迟时间
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* @param {Number} interval 每次运行的间隔时间
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* @param {Object} callback 定时执行的方法，参数为Timer本身
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* @param {mix} context 传入回调方法的上下文
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*/
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var Timer = function(id, delay, interval, callback, context) {
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this.id = id;
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this.delay = delay;
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this.interval = interval;
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this.callback = callback;
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this.context = context;
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};
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/**
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* 开始执行定时器
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* @method start
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*/
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Timer.prototype.start = function() {
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if (this.timer !== undefined) {
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clearTimeout(this.timer);
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delete this.timer;
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}
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var _this = this;
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var execute = function() {
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_this.callback(_this);
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//在回调函数中被中止
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if (_this.timer !== undefined) {
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_this.timer = setTimeout(execute, _this.interval);
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}
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};
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this.timer = setTimeout(execute, this.delay);
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};
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/**
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* 中止定时器
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* @method halt
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*/
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Timer.prototype.halt = function() {
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clearTimeout(this.timer);
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delete this.timer;
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};
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/**
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* 定时器是否在运行中
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* @method isRunning
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* @return Boolean
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*/
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Timer.prototype.isRunning = function() {
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return this.timer !== undefined;
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};
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/**
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* 定时器管理，这是一个单例
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* @class TimerManager
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* @constructor
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*/
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var TimerManager = function() {
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var instance = this;
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this.timers = {};
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TimerManager = function() {
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return instance;
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};
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};
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/**
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* 添加一个定时器
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* @method addTimer
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* @param {Object} 要添加的Timer
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*/
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TimerManager.prototype.addTimer = function(timer) {
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if (this.timers[timer.id] === undefined) {
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this.timers[timer.id] = timer;
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}
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return this;
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};
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/**
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* 根据唯一标识获取定时器
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* @method getTimer
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* @param {String} id 定时器的id
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* @return {Object}
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*/
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TimerManager.prototype.getTimer = function(id) {
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return this.timers[id];
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};
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/**
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* 删除一个定时器
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* @method halt
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* @param {String} id 定时器的id
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*/
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TimerManager.prototype.deleteTimer = function(id) {
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if (this.timers[id] !== undefined) {
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this.timers[id].halt();
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}
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delete this.timers[id];
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};
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/**
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* 定时器全部开始运行
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* @method startAll
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*/
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TimerManager.prototype.startAll = function() {
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for (id in this.timers) {
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this.timers[id].start();
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}
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};
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/**
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* 定时器全部中止
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* @method haltAll
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*/
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TimerManager.prototype.haltAll = function() {
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for (id in this.timers) {
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this.timers[id].halt();
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}
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}; |