jQuery timers计时器简单应用说明

/**
* jQuery.timers - Timer abstractions for jQuery
* Written by Blair Mitchelmore (blair DOT mitchelmore AT gmail DOT com)
* Licensed under the WTFPL (http://sam.zoy.org/wtfpl/).
* Date: 2009/10/16
*
* @author Blair Mitchelmore
* @version 1.2
*
**/

jQuery.fn.extend({
everyTime: function(interval, label, fn, times) {
return this.each(function() {
jQuery.timer.add(this, interval, label, fn, times);
});
},
oneTime: function(interval, label, fn) {
return this.each(function() {
jQuery.timer.add(this, interval, label, fn, 1);
});
},
stopTime: function(label, fn) {
return this.each(function() {
jQuery.timer.remove(this, label, fn);
});
}
});

jQuery.extend({
timer: {
global: [],
guid: 1,
dataKey: "jQuery.timer",
regex: /^([0-9]+(?:.[0-9]*)?)s*(.*s)?$/,
powers: {
// Yeah this is major overkill...
'ms': 1,
'cs': 10,
'ds': 100,
's': 1000,
'das': 10000,
'hs': 100000,
'ks': 1000000
},
timeParse: function(value) {
if (value == undefined || value == null)
return null;
var result = this.regex.exec(jQuery.trim(value.toString()));
if (result[2]) {
var num = parseFloat(result[1]);
var mult = this.powers[result[2]] || 1;
return num * mult;
} else {
return value;
}
},
add: function(element, interval, label, fn, times) {
var counter = 0;

if (jQuery.isFunction(label)) {
if (!times)
times = fn;
fn = label;
label = interval;
}

interval = jQuery.timer.timeParse(interval);

if (typeof interval != 'number' || isNaN(interval) || interval < 0)
return;

if (typeof times != 'number' || isNaN(times) || times < 0)
times = 0;

times = times || 0;

var timers = jQuery.data(element, this.dataKey) || jQuery.data(element, this.dataKey, {});

if (!timers[label])
timers[label] = {};

fn.timerID = fn.timerID || this.guid++;

var handler = function() {
if ((++counter > times && times !== 0) || fn.call(element, counter) === false)
jQuery.timer.remove(element, label, fn);
};

handler.timerID = fn.timerID;

if (!timers[label][fn.timerID])
timers[label][fn.timerID] = window.setInterval(handler,interval);

this.global.push( element );

},
remove: function(element, label, fn) {
var timers = jQuery.data(element, this.dataKey), ret;

if ( timers ) {

if (!label) {
for ( label in timers )
this.remove(element, label, fn);
} else if ( timers[label] ) {
if ( fn ) {
if ( fn.timerID ) {
window.clearInterval(timers[label][fn.timerID]);
delete timers[label][fn.timerID];
}
} else {
for ( var fn in timers[label] ) {
window.clearInterval(timers[label][fn]);
delete timers[label][fn];
}
}

for ( ret in timers[label] ) break;
if ( !ret ) {
ret = null;
delete timers[label];
}
}

for ( ret in timers ) break;
if ( !ret )
jQuery.removeData(element, this.dataKey);
}
}
}
});

jQuery(window).bind("unload", function() {
jQuery.each(jQuery.timer.global, function(index, item) {
jQuery.timer.remove(item);
});
});

$("#close-button").click(function() {
$(this).oneTime(1000, function() {
$(this).parent(".main-window").hide();
});
});
$("#cancel-button").click(function() {
$("#close-button").stopTime();
});

/*************************************************************
* everyTime(时间间隔, [计时器名称], 函式名称, [次数限制], [等待函式程序完成])
*************************************************************/

//每1秒执行函式test()
function test(){
//do something...
}
$('body').everyTime('1s',test);

//每1秒执行
$('body').everyTime('1s',function(){
//do something...
});

//每1秒执行，并命名计时器名称为A
$('body').everyTime('1s','A',function(){
//do something...
});

//每20秒执行，最多5次，并命名计时器名称为B
$('body').everyTime('2das','B',function(){
//do something...
},5);

//每20秒执行，无限次，并命名计时器名称为C
//若时间间隔抵到，但函式程序仍未完成则需等待执行函式完成后再继续计时
$('body').everyTime('2das','C',function(){
//执行一个会超过20秒以上的程式
},0,true);

/***********************************************************
* oneTime(时间间隔, [计时器名称], 呼叫的函式)
***********************************************************/
//倒数10秒后执行
$('body').oneTime('1das',function(){
//do something...
});

//倒数100秒后执行，并命名计时器名称为D
$('body').oneTime('1hs','D',function(){
//do something...
});

/************************************************************
* stopTime ([计时器名称], [函式名称])
************************************************************/
//停止所有的在$('body')上计时器
$('body').stopTime ();

//停止$('body')上名称为A的计时器
$('body').stopTime ('A');

//停止$('body')上所有呼叫test()的计时器
$('body').stopTime (test);

powers: {
// Yeah this is major overkill...
'ms': 1,
'cs': 10,
'ds': 100,
's': 1000,
'das': 10000,
'hs': 100000,
'ks': 1000000
}