/**
* jQuery custom checkboxes
* 
* Copyright (c) 2008 Khavilo Dmitry (http://widowmaker.kiev.ua/checkbox/)
* Licensed under the MIT License:
* http://www.opensource.org/licenses/mit-license.php
*
* @version 1.3.0 Beta 1
* @author Khavilo Dmitry
* @mailto wm.morgun@gmail.com
**/

(function($) {
	/* Little trick to remove event bubbling that causes events recursion */
	var CB = function(e) {
		if (!e) var e = window.event;
		e.cancelBubble = true;
		if (e.stopPropagation) e.stopPropagation();
	};

	$.fn.checkbox = function(options) {
		/* IE6 background flicker fix */
		try { document.execCommand('BackgroundImageCache', false, true); } catch (e) { }

		/* Default settings */
		var settings = {
			cls: 'jquery-checkbox'  /* checkbox  */
		};

		/* Processing settings */
		settings = $.extend(settings, options || {});

		/* Adds check/uncheck & disable/enable events */
		var addEvents = function(object) {
			var checked = object.checked;
			var disabled = object.disabled;
			var $object = $(object);

			if (object.stateInterval)
				clearInterval(object.stateInterval);

			object.stateInterval = setInterval(
				function() {
					if (object.disabled != disabled)
						$object.trigger((disabled = !!object.disabled) ? 'disable' : 'enable');
					if (object.checked != checked)
						$object.trigger((checked = !!object.checked) ? 'check' : 'uncheck');
				},
				10 /* in miliseconds. Low numbers this can decrease performance on slow computers, high will increase responce time */
			);
			return $object;
		};
		//try { console.log(this); } catch(e) {}

		/* Wrapping all passed elements */
		return this.each(function() {
			var ch = this; /* Reference to DOM Element*/
			var $ch = addEvents(ch); /* Adds custom events and returns, jQuery enclosed object */

			/* Removing wrapper if already applied  */
			if (ch.wrapper) ch.wrapper.remove();

			/* Creating wrapper for checkbox and assigning "hover" event */
			ch.wrapper = $('<span class="' + settings.cls + '"><span class="mark"><div></div></span></span>');
			ch.wrapperInner = ch.wrapper.children('span:eq(0)');
			ch.wrapper.hover(
				function(e) { ch.wrapperInner.addClass(settings.cls + '-hover'); CB(e); },
				function(e) { ch.wrapperInner.removeClass(settings.cls + '-hover'); CB(e); }
			);

			/* Wrapping checkbox */
			$ch.css({ position: 'absolute', zIndex: -1, display: "none" }).after(ch.wrapper);

			/* Ttying to find "our" label */
			var label = false;
			if ($ch.attr('id')) {
				label = $('label[for=' + $ch.attr('id') + ']');
				if (!label.length) label = false;
			}
			//			if (!label)
			//			{
			//				/* Trying to utilize "closest()" from jQuery 1.3+ */
			//				label = $ch.closest ? $ch.closest('label') : $ch.parents('label:eq(0)');
			//				if (!label.length) label = false;
			//			}
			/* Labe found, applying event hanlers */
			if (label) {
				label.hover(
					function(e) { ch.wrapper.trigger('mouseover', [e]); },
					function(e) { ch.wrapper.trigger('mouseout', [e]); }
				);
				label.click(function(e) { $ch.trigger('click', [e]).trigger("change", e); CB(e); return false; });
			}
			ch.wrapper.click(function(e) { $ch.trigger('click', [e]).trigger("change", e); CB(e); return false; });
			$ch.click(function(e) { CB(e); });
			$ch.bind('disable', function() { ch.wrapperInner.addClass(settings.cls + '-disabled'); }).bind('enable', function() { ch.wrapperInner.removeClass(settings.cls + '-disabled'); });
			$ch.bind('check', function() { ch.wrapper.addClass(settings.cls + '-checked'); }).bind('uncheck', function() { ch.wrapper.removeClass(settings.cls + '-checked'); });

			/* Disable image drag-n-drop for IE */
			$('div', ch.wrapper).bind('dragstart', function() { return false; }).bind('mousedown', function() { return false; });

			/* Firefox antiselection hack */
			if (window.getSelection)
				ch.wrapper.css('MozUserSelect', 'none');

			/* Applying checkbox state */
			if (ch.checked)
				ch.wrapper.addClass(settings.cls + '-checked');
			if (ch.disabled)
				ch.wrapperInner.addClass(settings.cls + '-disabled');

//			if (!ch.container) {
//				var ctr = $("<div />");
//				$(ch).before(ctr);
//				ctr.append($(ch)).append(ch.wrapper).append(label);
//			};
		});
	}
})(jQuery);