基于jquery 的一个progressbar widge

此项目的demo网站http://wijmo.com/Wijmo-Open/samples/

/* 
* wijprogressbar Widget. V1.0 
* 
* Copyright (c) Componentone Inc. 
* 
* Depends: 
* Jquery-1.4.2.js 
* jquery.ui.core.js 
* jquery.ui.widget.js 
* 
*Optional dependence for effect settings: 
* jquery.effects.core.js 
* jquery.effects.blind.js 
* jquery.effects.bounce.js 
* jquery.effects.clip.js 
* jquery.effects.drop.js 
* jquery.effects.explode.js 
* jquery.effects.fold.js 
* jquery.effects.hightlight.js 
* jquery.effects.pulsate.js 
* jquery.effects.scale.js 
* jquery.effects.shake.js 
* jquery.effects.slide.js 
* jquery.effects.transfer.js 
* HTML: 
* <div id="progressbar" style="width:***;height:***"></div> 
*/ 
(function ($) { 
$.widget("ui.wijprogressbar", $.ui.progressbar, { 
options: { 
/// <summary> 
///The label's alignment on the progress bar. The value should be "east", "west", "center", "north", "south" or "running". 
///Default:"center". 
///Type:String. 
///Code sample:$('.selector').wijprogressbar('option','labelAlign','center'). 
///</summary> 
labelAlign: "center", 
/// <summary> 
///The value of the progress bar,the type should be numeric. 
///Default:0. 
///Type:Number. 
///Code sample:$('.selector').wijprogressbar('option','value',60). 
///</summary> 
maxValue: 100, 
/// <summary> 
///The minimum value of the progress bar,the type should be numeric. 
///Default:0. 
///Type:Number. 
///Code sample:$('.selector').wijprogressbar('option','minValue',0). 
///</summary> 
minValue: 0, 
/// <summary> 
///The fill direction of the progress bar.the value should be "east", "west", "north" or "south". 
///Default:"east". 
///Type:String. 
///Code sample:$('.selector').wijprogressbar('option','fillDirection','east'). 
///</summary> 
fillDirection: "east", 
/// <summary> 
///The progressbar's orientation.the value should be 'horizontal' or 'vertical'. 
///Default:"horizontal". 
///Type:String. 
///Code sample:$('selector').wijprogressbar('option','orientation','horizontal'). 
///</summary> 
///orientation: "horizontal", 
/// <summary> 
///Sets the format of the label text.The available formats are as follows: 
///{0} or {ProgressValue} express the current progress Value. 
///{1} or {PercentProgress} express the current percent of the progress bar. 
///{2} or {RemainingProgress} express the remaining progress of the progress bar. 
///{3} or {PercentageRemaining} express the remaining percent of the progress bar. 
///{4} or {Min} express the min Vlaue of the progress bar. 
///{5} or {Max} express the max Value of the progress bar. 
///Default:"{1}%". 
///Type:String. 
///Code sample:$('.selector').wijprogressbar('option','labelFormatString','{0}%'). 
///</summary> 
labelFormatString: "{1}%", 
/// <summary> 
///Set the format of the ToolTip of the progress bar,the expression of the format like the labelFormatString. 
///Default:"{1}%". 
///Type:String. 
///Code sample:$('.selector').wijprogressbar('option','toolTipFormatString','{1}%'). 
///</summary> 
toolTipFormatString: "{1}%", 
/// <summary> 
///The increment of the progress bar's indicator. 
///Default:1. 
///Type:Number. 
///</summary> 
///Code sample:$('.selector').wijprogressbar('option','indicatorIncrement',10). 
indicatorIncrement: 1, 
/// <summary> 
///The Image's url of the indicator. 
///Default:"". 
///Type:String. 
///Code sample:$('.selector').wijprogressbar('option','indicatorImage','images/abc.png'). 
///</summary> 
indicatorImage: "", 
/// <summary> 
///The delay of the progressbar's animation. 
///Default:0. 
///Type:Number. 
///Code sample:$('.selector').wijprogressbar('option', 
///</summary> 
animationDelay: 0, 
/// <summary> 
///The options parameter of the jQuery's animation. 
///Default:"{animated:'progress',duration:500}". 
///Type:Options. 
///Code sample:$('.selector').wijprogressbar('option','animationOptions',{animated:'progress',duration:600}). 
///</summary> 
animationOptions: { 
animated: 'progress', 
duration: 500 
} 
}, 
　　　　　//when set the options, trigger this method. 
_setOption: function (key, value) { 
var val, self = this; 
switch (key) { 
case "value": 
val = parseInt(value); 
self.options[key] = val; 
self._refreshValue(val); 
break; 
case "maxValue": 
case "minValue": 
val = parseInt(value); 
self.options[key] = val; 
self[key === "maxValue" ? "max" : "min"] = val; 
self._refreshValue(); 
break; 
case "labelFormatString": 
case "toolTipFormatString": 
self.options[key] = value; 
self._refreshValue(); 
//$.Widget.prototype._setOption.apply(this, arguments); 
break; 
case "orientation": 
case "fillDirection": 
case "labelAlign": 
case "indicatorImage": 
self.options[key] = value; 
self._initElements(); 
self._refreshValue(); 
//$.Widget.prototype._setOption.apply(this, arguments); 
break; 
case "indicatorIncrement": 
value = (value == 0 ? 1 : value); 
self.options[key] = value; 
self._initElements(); 
self._refreshValue(); 
break; 
default: break; 
} 
$.Widget.prototype._setOption.apply(self, arguments); 
}, 
　　　　　///create the widget 
_create: function () { 
var self = this; 
self.min = self.options.minValue; 
self.max = self.options.maxValue; 
self.element.addClass("ui-wijprogressbar"); 
$.ui.progressbar.prototype._create.apply(self, arguments); 
self.label = $("<span>").addClass("ui-progressbar-label ui-corner-left").appendTo(self.valueDiv); 
self._initElements(); 
self._isInit = true; 
self._refreshValue(); 
}, 
　　　　　///Trigger the pressbar event. 
_triggerEvent: function (eventName, oldValue, newValue, cancel) { 
var ea = $.Event(eventName); 
ea.data = { 
oldValue: oldValue, 
newValue: newValue, 
cancel: cancel 
}; 
this._trigger(eventName, ea); 
return ea.data.cancel; 
}, 
　　　　//refresh the progress value. 
_refreshValue: function () { 
var self = this; 
if (!self._isInit) { 
return; 
} 
var value = self.value(); 
var percent = (value - self.min) / (self.max - self.min) * 100; 
var o = self.options; 

var cancel = self._triggerEvent("beforeProgressChanging", self.element.attr("aria-valuenow"), value, false); 
if (cancel) { 
return; 
} 
self.valueDiv.css({ 
width: "", 
height: "" 
}); 
　　　　　　　　　　// If have animation. 
if (o.animationOptions.animated && o.animationOptions.duration > 0) { 
setTimeout($.proxy(function () { 
var o = self.options.animationOptions; 
var animateOptions = { 
content: self.valueDiv, 
complete: $.proxy(function () { 
self._triggerEvent("progressChanged", self.element.attr("aria-valuenow"), value, false); 
}, self), 
step: $.proxy(function (ovalue) { 
self._performAnimating(ovalue); 
}, self), 
processValue: percent 
} 
var animations = $.ui.wijprogressbar.animations; 
var duration = o.duration; 
var easing = o.animated; 
if (easing && !animations[easing]) { 
easing = "progress"; 
} 
if (!animations[easing]) { 
animations[easing] = function (options) { 
this.progress(options, { 
easing: easing, 
duration: duration || 1000 
}); 
} 
} 
animations[easing](animateOptions, self.options.animationOptions); 

}, self), o.animationDelay); 
} 
else { 
//trigger the progressChanged event. 
var oldValue = self.element.attr("aria-valuenow"); 
self._refreshProgress(percent); 
self._triggerEvent("progressChanged", oldValue, value, false); 
} 
}, 
　　　　　　　///Set the label's position of the progress bar. 
_setLabelSide: function () { 
var self = this; 
var fillDirection = self.options.fillDirection; 
var labelAlign = self.options.labelAlign; 
if (self._isHorizontal()) { 
if (labelAlign === "west" || labelAlign === "east" || labelAlign === "center") { 
self.label.css("width", self.element.width() + 'px'); 
} 
else 
if (labelAlign === "running") { 
self.label.css("width", "auto"); 
} 
else { 
self.element.css("line-height", "normal"); 
self.valueDiv.css("line-height", "normal"); 
self.label.css("height", labelAlign === "north" ? self.element.height() + 'px' : "auto"); 
} 
} 
else { 
if (labelAlign === "west" || labelAlign === "east" || labelAlign === "center") { 
self.label.css({ "line-height": self.element.height() + 'px', "width": self.element.width() + 'px' }); 
} 
else 
if (labelAlign === "running") { 
self.label.css({ "height": "auto", "width": self.element.width() + 'px' }); 
} 
else { 
self.element.css("line-height", "normal"); 
self.valueDiv.css("line-height", "normal"); 
self.label.css("height", labelAlign === "north" ? self.element.height() + 'px' : "auto"); 
} 
} 
}, 
　　　　　　　///get the progress bar's progress orientation. 
_isHorizontal: function () { 
return this.options.fillDirection === "west" || this.options.fillDirection === "east"; 
}, 
　　　　///start the progress 
startTask: function () { 
/// <summary>Start the progress</summary> 
if ($(":animated", this.element).length == 0) { 
var value = this.value(); 
this._refreshValue(value); 
} 
}, 
　　　　　　　///stop the progress 
stopTask: function () { 
/// <summary>Stop the progress</summary> 
this.valueDiv.stop(); 
}, 
　　　　　　　//init the progress bar 
_initElements: function () { 
var self = this; 
var o = self.options; 
self.element.removeClass("ui-wijprogressbar-west ui-wijprogressbar-east ui-wijprogressbar-north ui-wijprogressbar-south").addClass("ui-wijprogressbar-" + o.fillDirection); 
var height = self.element.height(); 
self.valueDiv.css("line-height", ""); 
self.label.removeClass("lb_west lb_east lb_south lb_north lb_center lb_running").addClass("lb_" + o.labelAlign) 
.css("line-height", "").css({ 
left: "", 
right: "", 
top: "", 
bottom: "" 
}); 
if (self._isHorizontal()) { 
self.valueDiv.height(height) 
.css("line-height", height + "px"); 
} 
else { 
self.valueDiv.width(self.element.width()); 
} 
self._setLabelSide(); 
if (self.options.indicatorImage !== "") { 
self.valueDiv.css("background", "transparent url(" + self.options.indicatorImage + ") repeat fixed"); 
} 
}, 
　　　　　///refresh the progress 
_refreshProgress: function (value) { 
var self = this; 
var ea = new $.Event('progressChanging'); 
var nowValue = value * (self.max - self.min) / 100 + self.min; 
var o = self.options; 
var cancel = self._triggerEvent("progressChanging", self.element.attr("aria-valuenow"), nowValue, false); 
if (cancel) { 
return; 
} 
if (self._isHorizontal()) { 
self.valueDiv.toggleClass(o.fillDirection === "east" ? "ui-corner-right" : "ui-corner-left", value === self.max).width(value + "%"); 
} 
else { 
self.valueDiv.toggleClass(o.fillDirection === "south" ? "ui-corner-bottom" : "ui-corner-top", value === self.max).height(value + "%"); 
} 
self.element.attr("aria-valuenow", nowValue); 
var txt = self._getFormatString(o.labelFormatString, value); 
self._setLabelsText(txt); 
var _tooTip = self._getFormatString(o.toolTipFormatString, value); 
self.element.attr("title", _tooTip); 
}, 
　　　　　///play progress animation. 
_performAnimating: function (obj) { 
var self = this; 
var len = Math.floor(obj / self.options.indicatorIncrement); 
obj = len * self.options.indicatorIncrement; 
var o = self.options; 
self._refreshProgress(obj); 

if (o.labelAlign === "running") { 
if (self._isHorizontal()) { 
var eleWidth = self.element.width(); 
var labelWidth = self.label.outerWidth(); 
var progressWidth = self.valueDiv.outerWidth(); 
var left = eleWidth === progressWidth ? eleWidth - labelWidth : obj * eleWidth / 100 - labelWidth + labelWidth * (eleWidth - progressWidth) / eleWidth; 
self.label.css(o.fillDirection === "east" ? "left" : "right", left); 
} 
else { 
var eleHeight = self.element.height(); 
var labelHeight = self.label.outerHeight(); 
var progressHeight = self.valueDiv.outerHeight(); 
var top = eleHeight === progressHeight ? eleHeight - labelHeight : obj * eleHeight / 100 - labelHeight + labelHeight * (eleHeight - progressHeight) / eleHeight; 
self.label.css(o.fillDirection === "south" ? "top" : "bottom", top); 
} 
} 
}, 
　　　　　　　//set the label'text 
_setLabelsText: function (text) { 
if (!this._isHorizontal() && this.options.labelAlign === "rightOrBottom") { 
this.label.html('<span style=\'position:absolute;bottom:0px;text-align:center;width:' + this.element.width() + 'px;\'>' + text + '</span>'); 
return; 
} 

this.label.html(text); 
}, 
　　　　　　　//format the text 
_getFormatString: function (format, val) { 
var self = this; 
var processValue = parseInt(self.element.attr("aria-valuenow")); 
var remainingProcess = self.max - processValue 
var percentProgress = val; 
var percentageRemaining = 100 - val; 
var r = /\{0\}/g; 
format = format.replace(r, processValue.toString()); 
r = /\{ProgressValue\}/g; 
format = format.replace(r, processValue.toString()); 
r = /\{1\}/g; 
format = format.replace(r, percentProgress.toString()); 
r = /\{PercentProgress\}/g; 
format = format.replace(r, percentProgress.toString()); 
r = /\{2\}/g; 
format = format.replace(r, remainingProcess.toString()); 
r = /\{RemainingProgress\}/g; 
format = format.replace(r, remainingProcess.toString()); 
r = /\{3\}/g; 
format = format.replace(r, percentageRemaining.toString()); 
r = /\{PercentageRemaining\}/g; 
format = format.replace(r, percentageRemaining.toString()); 
r = /\{4\}/g; 
format = format.replace(r, self.min); 
r = /\{Min\}/g; 
format = format.replace(r, self.min); 
r = /\{5\}/g; 
format = format.replace(r, self.max); 
r = /\{Max\}/g; 
format = format.replace(r, self.max); 
return format; 
}, 
　　　　　　　///destroy the widget. 
destroy: function () { 
this.element.empty(); 
this.element.removeClass("ui-wijprogressbar ui-widget ui-widget-content ui-corner-all ui-wijprogressbar-h").removeAttr("title"); 
$.Widget.prototype.destroy.apply(this, arguments); 
} 
}); 
　　///progress bar animation. If user want to write custom animation,can override the animations option.And set the animated to the options key. 
$.extend($.ui.wijprogressbar, { 
animations: { 
progress: function (options, additions) { 
options = $.extend({ 
easing: "swing", 
duration: 1000 
}, options, additions); 
options.content.stop(true, true).animate({ 
widthvalue: options.processValue 
}, options); 
} 
} 
}); 
})(jQuery);

widget主要是处理ui层面的，实用与否只有用了才知道，widget可以利用jQuery已经存在的css framework。利用themeRoller，可以很轻松的换肤。至于说功能，可以在用户反馈后再慢慢完善。
这个progressbar本身是继承自jQuery ui progressbar的。因为开源，如果自己有好的想法，自己也可以去增加自己需要的功能。