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/**
* jQuery littleTree
*
* @version 0.1
* @author Mikahil Matyunin <free.all.bums@gmail.com>
*/
/**
* <ul id="tree">
* <li><label><input type="checkbox" />Item1</label></li>
* <li>
* <label><input type="checkbox" />ItemWithSubitems</label>
* <ul>
* <li><label><input type="checkbox" />Subitem1</label></li>
* </ul>
* </li>
* </ul>
*
* Usage:
*
* $('ul#tree').checktree();
*
*/
(function($){
$.fn.extend({
checktree: function(){
$(this)
.addClass('checktree-root')
.on('change', 'input[type="checkbox"]', function(e){
e.stopPropagation();
e.preventDefault();
checkParents($(this));
checkChildren($(this));
})
;
var checkParents = function (c)
{
var parentLi = c.parents('ul:eq(0)').parents('li:eq(0)');
if (parentLi.length)
{
var siblingsChecked = parseInt($('input[type="checkbox"]:checked', c.parents('ul:eq(0)')).length),
rootCheckbox = parentLi.find('input[type="checkbox"]:eq(0)')
;
if (c.is(':checked'))
rootCheckbox.prop('checked', true)
else if (siblingsChecked === 0)
rootCheckbox.prop('checked', false);
checkParents(rootCheckbox);
}
}
var checkChildren = function (c)
{
var childLi = $('ul li input[type="checkbox"]', c.parents('li:eq(0)'));
if (childLi.length)
childLi.prop('checked', c.is(':checked'));
}
}
});
})(jQuery);