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Filename : jquery-ui-sliderAccess.js
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/*
 * jQuery UI Slider Access
 * By: Trent Richardson [http://trentrichardson.com]
 * Version 0.3
 * Last Modified: 10/20/2012
 * 
 * Copyright 2011 Trent Richardson
 * Dual licensed under the MIT and GPL licenses.
 * http://trentrichardson.com/Impromptu/GPL-LICENSE.txt
 * http://trentrichardson.com/Impromptu/MIT-LICENSE.txt
 * 
 */
 (function($){

	$.fn.extend({
		sliderAccess: function(options){
			options = options || {};
			options.touchonly = options.touchonly !== undefined? options.touchonly : true; // by default only show it if touch device

			if(options.touchonly === true && !("ontouchend" in document)){
				return $(this);
			}
				
			return $(this).each(function(i,obj){
						var $t = $(this),
							o = $.extend({},{ 
											where: 'after',
											step: $t.slider('option','step'), 
											upIcon: 'ui-icon-plus', 
											downIcon: 'ui-icon-minus',
											text: false,
											upText: '+',
											downText: '-',
											buttonset: true,
											buttonsetTag: 'span',
											isRTL: false
										}, options),
							$buttons = $('<'+ o.buttonsetTag +' class="ui-slider-access">'+
											'<button data-icon="'+ o.downIcon +'" data-step="'+ (o.isRTL? o.step : o.step*-1) +'">'+ o.downText +'</button>'+
											'<button data-icon="'+ o.upIcon +'" data-step="'+ (o.isRTL? o.step*-1 : o.step) +'">'+ o.upText +'</button>'+
										'</'+ o.buttonsetTag +'>');

						$buttons.children('button').each(function(j, jobj){
							var $jt = $(this);
							$jt.button({ 
											text: o.text, 
											icons: { primary: $jt.data('icon') }
										})
								.click(function(e){
											var step = $jt.data('step'),
												curr = $t.slider('value'),
												newval = curr += step*1,
												minval = $t.slider('option','min'),
												maxval = $t.slider('option','max'),
												slidee = $t.slider("option", "slide") || function(){},
												stope = $t.slider("option", "stop") || function(){};

											e.preventDefault();
											
											if(newval < minval || newval > maxval){
												return;
											}
											
											$t.slider('value', newval);

											slidee.call($t, null, { value: newval });
											stope.call($t, null, { value: newval });
										});
						});
						
						// before or after					
						$t[o.where]($buttons);

						if(o.buttonset){
							$buttons.removeClass('ui-corner-right').removeClass('ui-corner-left').buttonset();
							$buttons.eq(0).addClass('ui-corner-left');
							$buttons.eq(1).addClass('ui-corner-right');
						}

						// adjust the width so we don't break the original layout
						var bOuterWidth = $buttons.css({
									marginLeft: ((o.where === 'after' && !o.isRTL) || (o.where === 'before' && o.isRTL)? 10:0), 
									marginRight: ((o.where === 'before' && !o.isRTL) || (o.where === 'after' && o.isRTL)? 10:0)
								}).outerWidth(true) + 5;
						var tOuterWidth = $t.outerWidth(true);
						$t.css('display','inline-block').width(tOuterWidth-bOuterWidth);
					});		
		}
	});

})(jQuery);