jquery.selectall.js

/**
 * selectAll jQuery plugin by Jonathan Dean (http://jonathandean.com)
 *   With contributions by Brian Cavalier (http://briancavalier.com/)
 *
 * Turns a checkbox into one that selects or deselects other checkboxes on the page
 *
 * Options:
 *   group: Selector specifying a parent element of the checkboxes the selectAll checkbox should manipulate
 *   row: Selector for the checkboxes the selectAll checkbox should manipulate
 *
 * Copyright (c) 2010 Jonathan Dean (http://jonathandean.com)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * Built on top of the jQuery library
 *   http://jquery.com
 */
(function($, window){
	$.fn.selectAll = function(options){
		/* warning: these defaults are likely to be very ineffecient. try to make them more specific */
		var defaults = {
			group: 'body',
			row: 'input[type=checkbox]',
			onchange: function(checked, unchecked) {}
		}
		,opts = $.extend(defaults, options)
		,self = this
		,checkedItems = opts.row + ":checked"
		,uncheckedItems = opts.row + ":not(:checked)"
		;

		function onChange(checked, unchecked) {
			// Fire registered onchange handler
			opts.onchange(checked, unchecked);
		}

		return this.each(function() {
			$(this).bind('change', function(){
				var other_rows = $(opts.group).find(opts.row)
					,checked = $(this).is(':checked');
				other_rows.attr('checked', checked);
				onChange($(opts.group).find(checkedItems), $(opts.group).find(uncheckedItems));
			});
			$(options.row).bind('change', function() {
				var unchecked = $(opts.group).find(uncheckedItems);
				$(self).attr('checked', (unchecked.length == 0));
				onChange($(opts.group).find(checkedItems), unchecked);
			});
		});
	};
})(jQuery, window);