jquery.ui.progressbar.js

/*
 * jQuery UI Progressbar @VERSION
 *
 * Copyright 2010, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Progressbar
 *
 * Depends:
 *   jquery.ui.core.js
 *   jquery.ui.widget.js
 */
(function( $, undefined ) {

$.widget( "ui.progressbar", {
	options: {
		value: 0
	},

	min: 0,
	max: 100,

	_create: function() {
		this.element
			.addClass( "ui-progressbar ui-widget ui-widget-content ui-corner-all" )
			.attr({
				role: "progressbar",
				"aria-valuemin": this.min,
				"aria-valuemax": this.max,
				"aria-valuenow": this._value()
			});

		this.valueDiv = $( "<div class='ui-progressbar-value ui-widget-header ui-corner-left'></div>" )
			.appendTo( this.element );

		this._refreshValue();
	},

	destroy: function() {
		this.element
			.removeClass( "ui-progressbar ui-widget ui-widget-content ui-corner-all" )
			.removeAttr( "role" )
			.removeAttr( "aria-valuemin" )
			.removeAttr( "aria-valuemax" )
			.removeAttr( "aria-valuenow" );

		this.valueDiv.remove();

		$.Widget.prototype.destroy.apply( this, arguments );
	},

	value: function( newValue ) {
		if ( newValue === undefined ) {
			return this._value();
		}

		this._setOption( "value", newValue );
		return this;
	},

	_setOption: function( key, value ) {
		if ( key === "value" ) {
			this.options.value = value;
			this._refreshValue();
			this._trigger( "change" );
		}

		$.Widget.prototype._setOption.apply( this, arguments );
	},

	_value: function() {
		var val = this.options.value;
		// normalize invalid value
		if ( typeof val !== "number" ) {
			val = 0;
		}
		return Math.min( this.max, Math.max( this.min, val ) );
	},

	_refreshValue: function() {
		var value = this.value();
		this.valueDiv
			.toggleClass( "ui-corner-right", value === this.max )
			.width( value + "%" );
		this.element.attr( "aria-valuenow", value );
	}
});

$.extend( $.ui.progressbar, {
	version: "@VERSION"
});

})( jQuery );