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/**********************************************************************************
**
** jQuery Tristate Checkbox Plugin
** version: 1.0
**
** Dual licensed under the MIT and GPL licenses:
** http://www.opensource.org/licenses/mit-license.php
** http://www.gnu.org/licenses/gpl.html
**
** author: Jeff Leombruno
** creation date: 09.20.2011
** dependencies: jQuery v1.6 or higher
**
** This file contains the functionality for implementing 3 state checkboxes.
** Inspired by:
** http://code.google.com/p/jquery-tristate-checkbox/
** http://css-tricks.com/13467-indeterminate-checkboxes/
**
**********************************************************************************/
(function($){
$.fn.tristate = function(options){
var config = {
selector: $(this).selector,
checked: null,
container: null,
siblings: null
};
var opts = $.extend(config, options);
return this.each(function(){
var obj = $(this);
var triState = function() {
var pub = {};
pub.init = function(){
$('input[type="checkbox"]', obj).change(function(e) {
config.checked = $(this).prop("checked")
config.container = $(this).parent()
config.siblings = config.container.siblings();
config.container.find('input[type="checkbox"]').prop({
indeterminate: false,
checked: config.checked
});
pub.checkSiblings(config.container);
});
// run checkSiblings for every checked checkbox when the page loads
$('input[type=checkbox]:checked', obj).each( function() {
pub.checkSiblings($(this).parent());
});
};
pub.checkSiblings = function(el) {
var parent = el.parent().parent();
var all = true;
el.siblings().each(function() {
return all = ($(this).children('input[type="checkbox"]').prop("checked") === config.checked);
});
if (all && config.checked) {
parent.children('input[type="checkbox"]').prop({
indeterminate: false,
checked: config.checked
});
pub.checkSiblings(parent);
} else if (all && !config.checked) {
parent.children('input[type="checkbox"]').prop("checked", config.checked);
parent.children('input[type="checkbox"]').prop("indeterminate", (parent.find('input[type="checkbox"]:checked').length > 0));
pub.checkSiblings(parent);
} else {
el.parents("li").children('input[type="checkbox"]').prop({
indeterminate: true,
checked: false
});
}
};
return pub;
}();
triState.init();
triState.checkSiblings(obj);
});
};
})(jQuery);
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