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741 lines
22 KiB
JavaScript
Executable File
741 lines
22 KiB
JavaScript
Executable File
/*
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Copyright (c) 2011, Yahoo! Inc. All rights reserved.
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Code licensed under the BSD License:
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http://developer.yahoo.com/yui/license.html
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version: 2.9.1
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*/
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/**
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*
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* @module progressbar
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* @requires yahoo, dom, event, element
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* @optional animation
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* @title ProgressBar Widget
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*/
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(function () {
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var Dom = YAHOO.util.Dom,
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Lang = YAHOO.lang,
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// ClassNames
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CLASS_PROGBAR = 'yui-pb',
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CLASS_MASK = CLASS_PROGBAR + '-mask',
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CLASS_BAR = CLASS_PROGBAR + '-bar',
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CLASS_ANIM = CLASS_PROGBAR + '-anim',
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CLASS_TL = CLASS_PROGBAR + '-tl',
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CLASS_TR = CLASS_PROGBAR + '-tr',
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CLASS_BL = CLASS_PROGBAR + '-bl',
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CLASS_BR = CLASS_PROGBAR + '-br',
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// Configuration attributes
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WIDTH = 'width',
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HEIGHT = 'height',
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MIN_VALUE = 'minValue',
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MAX_VALUE = 'maxValue',
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VALUE = 'value',
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ANIM = 'anim',
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DIRECTION = 'direction',
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DIRECTION_LTR = 'ltr',
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DIRECTION_RTL = 'rtl',
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DIRECTION_TTB = 'ttb',
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DIRECTION_BTT = 'btt',
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BAR_EL = 'barEl',
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MASK_EL = 'maskEl',
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ARIA_TEXT_TEMPLATE = 'ariaTextTemplate',
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ACC = 'animAcceleration',
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BG_POSITION = 'background-position',
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PX = 'px',
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// Events
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START = 'start',
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PROGRESS = 'progress',
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COMPLETE = 'complete';
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/**
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* The ProgressBar widget provides an easy way to draw a bar depicting progress of an operation,
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* a level meter, rating or any such simple linear measure.
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* It allows for highly customized styles including animation, vertical or horizontal and forward or reverse.
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* @namespace YAHOO.widget
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* @class ProgressBar
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* @extends YAHOO.util.Element
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* @param oConfigs {object} An object containing any configuration attributes to be set
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* @constructor
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*/
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var Prog = function(oConfigs) {
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Prog.superclass.constructor.call(this, document.createElement('div') , oConfigs);
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this._init(oConfigs);
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};
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YAHOO.widget.ProgressBar = Prog;
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/**
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* String containing the HTML string which is the basis for the Progress
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* Bar. Value is inserted into the DOM with innerHTML.
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*
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* @property ProgressBar.MARKUP
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* @type HTML
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* @static
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* @final
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* @default (too long)
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*/
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Prog.MARKUP = [
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'<div class="',
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CLASS_BAR,
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'"></div><div class="',
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CLASS_MASK,
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'"><div class="',
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CLASS_TL,
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'"></div><div class="',
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CLASS_TR,
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'"></div><div class="',
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CLASS_BL,
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'"></div><div class="',
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CLASS_BR,
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'"></div></div>'
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].join('');
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Lang.extend(Prog, YAHOO.util.Element, {
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/**
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* Initialization code for the widget, separate from the constructor to allow for overriding/patching.
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* It is called after <a href="#method_initAttributes">initAttributes</a>
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*
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* @method _init
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* @param oConfigs {Object} (Optional) Object literal definition of configuration values.
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* @protected
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*/
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_init: function (oConfigs) {
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/**
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* Fires when the value is about to change. It reports the starting value
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* @event start
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* @type CustomEvent
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* @param value {Number} the current (initial) value
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*/
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// No actual creation required, event will be created when subscribed to
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//this.createEvent(START);
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/**
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* If animation is active, it will trigger several times during the animation providing intermediate values
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* If animation is not active, it will fire only once providing the end value
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* @event progress
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* @type CustomEvent
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* @param value{Number} the current, changing value
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*/
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// No actual creation required, event will be created when subscribed to
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//this.createEvent(PROGRESS);
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/**
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* Fires at the end of the animation or immediately upon changing values if animation is not loaded
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* @event complete
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* @type CustomEvent
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* @param value {Number} the current (final) value
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*/
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// No actual creation required, event will be created when listened to
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//this.createEvent(COMPLETE);
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},
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/**
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* Implementation of Element's abstract method. Sets up config values.
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*
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* @method initAttributes
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* @param oConfigs {Object} (Optional) Object literal definition of configuration values.
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* @private
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*/
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initAttributes: function (oConfigs) {
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Prog.superclass.initAttributes.call(this, oConfigs);
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this.set('innerHTML',Prog.MARKUP);
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this.addClass(CLASS_PROGBAR);
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// I need to apply at least the following styles, if present in oConfigs,
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// to the ProgressBar so when it later reads the width and height,
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// they are already set to the correct values.
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// id is important because it can be used as a CSS selector.
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var key, presets = ['id',WIDTH,HEIGHT,'class','style'];
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while((key = presets.pop())) {
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if (key in oConfigs) {
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this.set(key,oConfigs[key]);
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}
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}
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/**
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* @attribute barEl
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* @description Reference to the HTML object that makes the moving bar (read-only)
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* @type HTMLElement (div)
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* @readonly
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*/
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this.setAttributeConfig(BAR_EL, {
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readOnly: true,
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value: this.getElementsByClassName(CLASS_BAR)[0]
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});
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/**
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* @attribute maskEl
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* @description Reference to the HTML object that overlays the bar providing the mask. (read-only)
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* @type HTMLElement (table)
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* @readonly
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*/
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this.setAttributeConfig(MASK_EL, {
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readOnly: true,
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value: this.getElementsByClassName(CLASS_MASK)[0]
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});
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/**
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* @attribute direction
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* @description Direction of movement of the bar.
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* It can be any of 'ltr' (left to right), 'rtl' (the reverse) , 'ttb' (top to bottom) or 'btt'.
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* Can only be set before rendering.
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* @default 'ltr'
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* @type String (any of "ltr", "rtl", "ttb" or "btt")
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*/
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this.setAttributeConfig(DIRECTION, {
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value:DIRECTION_LTR,
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validator:function(value) {
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if (this._rendered) { return false; }
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switch (value) {
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case DIRECTION_LTR:
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case DIRECTION_RTL:
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case DIRECTION_TTB:
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case DIRECTION_BTT:
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return true;
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default:
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return false;
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}
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}
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});
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/**
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* @attribute maxValue
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* @description Represents the top value for the bar.
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* The bar will be fully extended when reaching this value.
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* Values higher than this will be ignored.
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* @default 100
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* @type Number
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*/
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this.setAttributeConfig(MAX_VALUE, {
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value: 100,
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validator: Lang.isNumber,
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method: function (value) {
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this.get('element').setAttribute('aria-valuemax',value);
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if (this.get(VALUE) > value) { this.set(VALUE,value); }
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}
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});
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/**
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* @attribute minValue
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* @description Represents the lowest value for the bar.
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* The bar will be totally collapsed when reaching this value.
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* Values lower than this will be ignored.
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* @default 0
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* @type Number
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*/
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this.setAttributeConfig(MIN_VALUE, {
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value: 0,
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validator: Lang.isNumber,
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method: function (value) {
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this.get('element').setAttribute('aria-valuemin',value);
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if (this.get(VALUE) < value) { this.set(VALUE,value); }
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}
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});
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/**
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* @attribute width
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* @description Pixel width of the ProgressBar, i.e., 200 or "200px".
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* It will always be returned as a string including units.
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* @default "200px"
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* @type Number or String
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*/
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this.setAttributeConfig(WIDTH, {
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getter: function() {
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return this.getStyle(WIDTH);
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},
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method: this._widthChange
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});
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/**
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* @attribute height
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* @description Pixel height of the ProgressBar, i.e., 200 or "200px".
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* It will always be returned as a string including units.
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* @default "20px"
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* @type Number or String
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*/
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this.setAttributeConfig(HEIGHT, {
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getter:function() {
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return this.getStyle(HEIGHT);
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},
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method: this._heightChange
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});
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/**
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* @attribute ariaTextTemplate
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* @description Text to be voiced by screen readers.
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* The text is processed by <a href="YAHOO.lang.html#method_substitute">YAHOO.lang.substitute</a>.
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* It can use the placeholders {value}, {minValue} and {maxValue}
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* @default "{value}"
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* @type String
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*/
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this.setAttributeConfig(ARIA_TEXT_TEMPLATE, {
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value:'{value}'
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});
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/**
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* @attribute value
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* @description The value for the bar.
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* Valid values are in between the minValue and maxValue attributes.
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* @default 0
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* @type Number
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*/
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this.setAttributeConfig(VALUE, {
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value: 0,
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validator: function(value) {
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return Lang.isNumber(value) && value >= this.get(MIN_VALUE) && value <= this.get(MAX_VALUE);
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},
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method: this._valueChange
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});
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/**
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* @attribute anim
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* @description It accepts either a boolean (recommended) or an instance of <a href="YAHOO.util.Anim.html">YAHOO.util.Anim</a>.
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* If a boolean, it will enable/disable animation creating its own instance of the animation utility.
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* If given an instance of <a href="YAHOO.util.Anim.html">YAHOO.util.Anim</a> it will use that instance.
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* The <a href="YAHOO.util.Anim.html">animation</a> utility needs to be loaded.
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* When read, it returns the instance of the animation utility in use or null if none.
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* It can be used to set the animation parameters such as easing methods or duration.
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* @default null
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* @type {boolean} or {instance of YAHOO.util.Anim}
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*/
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this.setAttributeConfig(ANIM, {
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validator: function(value) {
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return !!YAHOO.util.Anim;
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},
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setter: this._animSetter
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});
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/**
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* @attribute animAcceleration
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* @description It accepts a number or null to cancel.
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* If a number, it is how fast the background image for the bar will move in the
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* opposite direction to the bar itself. null or 0 means the background won't move.
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* Negative values will make the background move along the bar.
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* Only valid with animation active and it requires a suitable background image to make it evident.
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* @default null
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* @type {number} or {null}
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*/
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this.setAttributeConfig(ACC, {
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value:null,
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validator: function(value) {
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return Lang.isNumber(value) || Lang.isNull(value);
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},
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method: function(value) {
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this._fixAnim(this.get(ANIM),value);
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}
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});
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},
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/**
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* Renders the ProgressBar into the given container.
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* If the container has other content, the ProgressBar will be appended to it.
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* If the second argument is provided, the ProgressBar will be inserted before the given child.
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* The method is chainable since it returns a reference to this instance.
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* @method render
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* @param el {HTML Element} HTML element that will contain the ProgressBar
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* @param before {HTML Element} (optional) If present, the ProgressBar will be inserted before this element.
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* @return {YAHOO.widget.ProgressBar}
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* @chainable
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*/
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render: function(parent, before) {
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if (this._rendered) { return; }
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this._rendered = true;
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var direction = this.get(DIRECTION);
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// If the developer set a className attribute on initialization,
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// Element would have wiped out my own classNames
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// So I need to insist on them, plus add the one for direction.
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this.addClass(CLASS_PROGBAR);
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this.addClass(CLASS_PROGBAR + '-' + direction);
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var container = this.get('element');
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container.tabIndex = 0;
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container.setAttribute('role','progressbar');
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container.setAttribute('aria-valuemin',this.get(MIN_VALUE));
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container.setAttribute('aria-valuemax',this.get(MAX_VALUE));
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this.appendTo(parent,before);
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this.redraw(false);
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this._previousValue = this.get(VALUE);
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this._fixEdges();
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this.on('minValueChange',this.redraw);
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this.on('maxValueChange',this.redraw);
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return this;
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},
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/**
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* Recalculates the bar size and position and redraws it
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* @method redraw
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* @param noAnim {boolean} Don't use animation to redraw
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* @return void
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*/
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redraw: function (noAnim) {
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this._recalculateConstants();
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this._valueChange(this.get(VALUE), noAnim);
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},
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/**
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* Destroys the ProgressBar, related objects and unsubscribes from all events
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* @method destroy
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* @return void
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*/
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destroy: function() {
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this.set(ANIM,false);
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this.unsubscribeAll();
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var el = this.get('element');
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if (el.parentNode) { el.parentNode.removeChild(el); }
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},
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/**
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* The previous value setting for the bar. Used mostly as information to event listeners
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* @property _previousValue
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* @type Number
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* @private
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* @default 0
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*/
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_previousValue:0,
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/**
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* The actual space (in pixels) available for the bar within the mask (excludes margins)
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* @property _barSpace
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* @type Number
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* @private
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* @default 100
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*/
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_barSpace:100,
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/**
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* The factor to convert the actual value of the bar into pixels
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* @property _barSpace
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* @type Number
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* @private
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* @default 1
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*/
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_barFactor:1,
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/**
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* A flag to signal that rendering has already happened
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* @property _rendered
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* @type boolean
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* @private
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* @default false
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*/
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_rendered:false,
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/**
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* Method called when the height attribute is changed
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* @method _heightChange
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* @param {int or string} value New height, in pixels if int or string including units
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* @return void
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* @private
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*/
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_heightChange: function(value) {
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if (Lang.isNumber(value)) {
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value += PX;
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}
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this.setStyle(HEIGHT,value);
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this._fixEdges();
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this.redraw(false);
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},
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/**
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* Method called when the height attribute is changed
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* @method _widthChange
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* @param {int or string} value New width, in pixels if int or string including units
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* @return void
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* @private
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*/
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_widthChange: function(value) {
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if (Lang.isNumber(value)) {
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value += PX;
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}
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this.setStyle(WIDTH,value);
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this._fixEdges();
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this.redraw(false);
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},
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/**
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* Due to rounding differences, some browsers fail to cover the whole area
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* with the mask quadrants when the width or height is odd. This method
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* stretches the lower and/or right quadrants to make the difference.
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* @method _fixEdges
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* @return void
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* @private
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*/
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_fixEdges:function() {
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if (!this._rendered || YAHOO.env.ua.ie || YAHOO.env.ua.gecko ) { return; }
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var maskEl = this.get(MASK_EL),
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tlEl = Dom.getElementsByClassName(CLASS_TL,undefined,maskEl)[0],
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trEl = Dom.getElementsByClassName(CLASS_TR,undefined,maskEl)[0],
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blEl = Dom.getElementsByClassName(CLASS_BL,undefined,maskEl)[0],
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brEl = Dom.getElementsByClassName(CLASS_BR,undefined,maskEl)[0],
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newSize = (parseInt(Dom.getStyle(maskEl,HEIGHT),10) -
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parseInt(Dom.getStyle(tlEl,HEIGHT),10)) + PX;
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Dom.setStyle(blEl,HEIGHT,newSize);
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Dom.setStyle(brEl,HEIGHT,newSize);
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newSize = (parseInt(Dom.getStyle(maskEl,WIDTH),10) -
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parseInt(Dom.getStyle(tlEl,WIDTH),10)) + PX;
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Dom.setStyle(trEl,WIDTH,newSize);
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Dom.setStyle(brEl,WIDTH,newSize);
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},
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/**
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* Calculates some auxiliary values to make the rendering faster
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* @method _recalculateConstants
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* @return void
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* @private
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*/
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_recalculateConstants: function() {
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var barEl = this.get(BAR_EL);
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switch (this.get(DIRECTION)) {
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case DIRECTION_LTR:
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case DIRECTION_RTL:
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this._barSpace = parseInt(this.get(WIDTH),10) -
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(parseInt(Dom.getStyle(barEl,'marginLeft'),10) || 0) -
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(parseInt(Dom.getStyle(barEl,'marginRight'),10) || 0);
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break;
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case DIRECTION_TTB:
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case DIRECTION_BTT:
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this._barSpace = parseInt(this.get(HEIGHT),10) -
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(parseInt(Dom.getStyle(barEl,'marginTop'),10) || 0)-
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(parseInt(Dom.getStyle(barEl,'marginBottom'),10) || 0);
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break;
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}
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this._barFactor = this._barSpace / (this.get(MAX_VALUE) - (this.get(MIN_VALUE) || 0)) || 1;
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},
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/**
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* Called in response to a change in the <a href="#config_anim">anim</a> attribute.
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* It creates and sets up or destroys the instance of the animation utility that will move the bar
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* @method _animSetter
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* @param value {boolean ,YAHOO.util.Anim} Enable animation or set to specific instance
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* @return void
|
|
* @private
|
|
*/
|
|
_animSetter: function (value) {
|
|
var anim, barEl = this.get(BAR_EL);
|
|
if (value) {
|
|
if (value instanceof YAHOO.util.Anim) {
|
|
anim = value;
|
|
} else {
|
|
anim = new YAHOO.util.Anim(barEl);
|
|
}
|
|
anim.onTween.subscribe(this._animOnTween,this,true);
|
|
anim.onComplete.subscribe(this._animComplete,this,true);
|
|
|
|
this._fixAnim(anim,this.get(ACC));
|
|
|
|
} else {
|
|
anim = this.get(ANIM);
|
|
if (anim) {
|
|
anim.onTween.unsubscribeAll();
|
|
anim.onComplete.unsubscribeAll();
|
|
}
|
|
anim = null;
|
|
}
|
|
return anim;
|
|
},
|
|
/**
|
|
* Temporary solution until http://yuilibrary.com/projects/yui2/ticket/2528222 gets solved.
|
|
* Also fixes: http://yuilibrary.com/projects/yui2/ticket/2528919.
|
|
* It also handles moving the background as per the animAcceleration configuration attribute
|
|
* since it turned out to be the best place to handle it.
|
|
* @method _fixAnim
|
|
* @param anim {YAHOO.util.Anim} Instance of Animation to fix
|
|
* @param acc {number} Value of animAcceleration attribute
|
|
* @return void
|
|
* @private
|
|
*/
|
|
_fixAnim: function(anim, acc) {
|
|
|
|
|
|
if (anim) {
|
|
if (!this._oldSetAttribute) {
|
|
this._oldSetAttribute = anim.setAttribute;
|
|
}
|
|
var pb = this;
|
|
switch(this.get(DIRECTION)) {
|
|
case DIRECTION_LTR:
|
|
anim.setAttribute = function(attr , val , unit) {
|
|
val = Math.round(val);
|
|
pb._oldSetAttribute.call(this,attr,val,unit);
|
|
if (attr == WIDTH) {
|
|
pb._oldSetAttribute.call(this,BG_POSITION,-val * acc,PX);
|
|
}
|
|
};
|
|
break;
|
|
case DIRECTION_RTL:
|
|
anim.setAttribute = function(attr , val , unit) {
|
|
val = Math.round(val);
|
|
pb._oldSetAttribute.call(this,attr,val,unit);
|
|
if (attr == WIDTH) {
|
|
var left = pb._barSpace - val;
|
|
pb._oldSetAttribute.call(this,'left',left, PX);
|
|
pb._oldSetAttribute.call(this, BG_POSITION, -left + val * acc, PX);
|
|
}
|
|
};
|
|
break;
|
|
case DIRECTION_TTB:
|
|
anim.setAttribute = function(attr , val , unit) {
|
|
val = Math.round(val);
|
|
pb._oldSetAttribute.call(this,attr,val,unit);
|
|
if (attr == HEIGHT) {
|
|
pb._oldSetAttribute.call(this,BG_POSITION,'center ' + (- val * acc),PX);
|
|
}
|
|
};
|
|
break;
|
|
|
|
case DIRECTION_BTT:
|
|
anim.setAttribute = function(attr , val , unit) {
|
|
val = Math.round(val);
|
|
pb._oldSetAttribute.call(this,attr,val,unit);
|
|
if (attr == HEIGHT) {
|
|
var top = pb._barSpace - val;
|
|
pb._oldSetAttribute.call(this,'top',top, PX);
|
|
pb._oldSetAttribute.call(this, BG_POSITION,'center ' + (val * acc - top), PX);
|
|
}
|
|
};
|
|
break;
|
|
}
|
|
// up to here
|
|
}
|
|
},
|
|
/**
|
|
* Called when the animation signals it has completed.
|
|
* @method _animComplete
|
|
* @return void
|
|
* @private
|
|
*/
|
|
_animComplete: function() {
|
|
var value = this.get(VALUE);
|
|
this._previousValue = value;
|
|
this.fireEvent(PROGRESS,value);
|
|
this.fireEvent(COMPLETE, value);
|
|
Dom.removeClass(this.get(BAR_EL),CLASS_ANIM);
|
|
},
|
|
/**
|
|
* Called for each onTween event of the animation instance.
|
|
* @method _animComplete
|
|
* @param name {string} Name of the event fired
|
|
* @param oArgs {object} Arguments provided by the Anim instance
|
|
* @return void
|
|
* @private
|
|
*/
|
|
_animOnTween:function (name,oArgs) {
|
|
var value = Math.floor(this._tweenFactor * oArgs[0].currentFrame + this._previousValue);
|
|
this.fireEvent(PROGRESS,value);
|
|
},
|
|
|
|
/**
|
|
* Called in response to a change in the <a href="#config_value">value</a> attribute.
|
|
* Moves the bar to reflect the new value
|
|
* @method _valueChange
|
|
* @param value {number} New value to be set
|
|
* @param noAnim {boolean} Disable animation for this redraw
|
|
* @return void
|
|
* @private
|
|
*/
|
|
_valueChange: function (value, noAnim) {
|
|
var anim = this.get(ANIM),
|
|
pixelValue = Math.floor((value - this.get(MIN_VALUE)) * this._barFactor);
|
|
|
|
this._setAriaText(value);
|
|
if (this._rendered) {
|
|
if (anim) {
|
|
anim.stop();
|
|
if (anim.isAnimated()) { anim._onComplete.fire(); } // see: http://yuilibrary.com/projects/yui2/ticket/2528217
|
|
}
|
|
this.fireEvent(START,this._previousValue);
|
|
Prog._barSizeFunctions[((noAnim !== false) && anim)?1:0][this.get(DIRECTION)].call(this, value, pixelValue, this.get(BAR_EL), anim);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Utility method to set the ARIA value attributes
|
|
* @method _setAriaText
|
|
* @param value {number} Value to be voiced
|
|
* @return void
|
|
* @private
|
|
*/
|
|
_setAriaText: function(value) {
|
|
|
|
var container = this.get('element'),
|
|
text = Lang.substitute(this.get(ARIA_TEXT_TEMPLATE),{
|
|
value:value,
|
|
minValue:this.get(MIN_VALUE),
|
|
maxValue:this.get(MAX_VALUE)
|
|
});
|
|
container.setAttribute('aria-valuenow',value);
|
|
container.setAttribute('aria-valuetext',text);
|
|
}
|
|
});
|
|
/**
|
|
* Collection of functions used to calculate the size of the bar.
|
|
* One of this will be used depending on direction and whether animation is active.
|
|
* @property _barSizeFunctions
|
|
* @type {collection of functions}
|
|
* @private
|
|
* @static
|
|
*/
|
|
var b = [{},{}];
|
|
Prog._barSizeFunctions = b;
|
|
|
|
b[0][DIRECTION_LTR] = function(value, pixelValue, barEl, anim) {
|
|
Dom.setStyle(barEl,WIDTH, pixelValue + PX);
|
|
this.fireEvent(PROGRESS,value);
|
|
this.fireEvent(COMPLETE,value);
|
|
};
|
|
b[0][DIRECTION_RTL] = function(value, pixelValue, barEl, anim) {
|
|
Dom.setStyle(barEl,WIDTH, pixelValue + PX);
|
|
Dom.setStyle(barEl,'left',(this._barSpace - pixelValue) + PX);
|
|
this.fireEvent(PROGRESS,value);
|
|
this.fireEvent(COMPLETE,value);
|
|
};
|
|
b[0][DIRECTION_TTB] = function(value, pixelValue, barEl, anim) {
|
|
Dom.setStyle(barEl,HEIGHT, pixelValue + PX);
|
|
this.fireEvent(PROGRESS,value);
|
|
this.fireEvent(COMPLETE,value);
|
|
};
|
|
b[0][DIRECTION_BTT] = function(value, pixelValue, barEl, anim) {
|
|
Dom.setStyle(barEl,HEIGHT, pixelValue + PX);
|
|
Dom.setStyle(barEl,'top', (this._barSpace - pixelValue) + PX);
|
|
this.fireEvent(PROGRESS,value);
|
|
this.fireEvent(COMPLETE,value);
|
|
};
|
|
b[1][DIRECTION_LTR] = function(value, pixelValue, barEl, anim) {
|
|
Dom.addClass(barEl,CLASS_ANIM);
|
|
this._tweenFactor = (value - this._previousValue) / anim.totalFrames / anim.duration;
|
|
anim.attributes = {width:{ to: pixelValue }};
|
|
anim.animate();
|
|
};
|
|
b[1][DIRECTION_RTL] = b[1][DIRECTION_LTR];
|
|
b[1][DIRECTION_TTB] = function(value, pixelValue, barEl, anim) {
|
|
Dom.addClass(barEl,CLASS_ANIM);
|
|
this._tweenFactor = (value - this._previousValue) / anim.totalFrames / anim.duration;
|
|
anim.attributes = {height:{to: pixelValue}};
|
|
anim.animate();
|
|
};
|
|
b[1][DIRECTION_BTT] = b[1][DIRECTION_TTB];
|
|
|
|
})();
|
|
|
|
YAHOO.register("progressbar", YAHOO.widget.ProgressBar, {version: "2.9.1", build: "2800"});
|