90 lines
2.8 KiB
JavaScript
90 lines
2.8 KiB
JavaScript
(function($){
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$.fn.qubit = function( options ) {
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return this.each(function() {
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var qubit = new Qubit(this, options);
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});
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};
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var Qubit = function( el ) {
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var self = this;
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this.scope = el = $(el);
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$('input[type=checkbox]', el).on('change', function(e) {
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self.process(e.target, e);
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});
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$('input[type=checkbox]:checked').each(function() {
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self.process(this)
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});
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};
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Qubit.prototype = {
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itemSelector: 'li',
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process: function( checkbox, event ) {
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var checkbox = $(checkbox),
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parentItems = checkbox.parents(this.itemSelector),
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self = this;
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// all children inherit my state
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parentItems.eq(0).find('input[type=checkbox]').each(function() {
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if( !$(this).parent().hasClass('hidden') ) {
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self.setChecked(this, checkbox.prop('checked'), event);
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}
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});
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this.processParents(checkbox);
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},
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processParents: function( checkbox ) {
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checkbox = $(checkbox);
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var parentItems = checkbox.parents(this.itemSelector),
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parent = parentItems.eq(1).children('input[type=checkbox]');
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// check parent is within our scope
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if( !jQuery.contains(this.scope[0], parent[0]) ) return;
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if( parent.length > 0 ) {
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var siblings = this.getSiblings(checkbox, parentItems.eq(1)),
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checked = siblings.filter(':checked'),
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oldValue = this.getValue(parent), parentChecked = null;
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// if all siblings are checked
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if( siblings.length == checked.length ) {
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parentChecked = true;
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}
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// else if some are checked
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else if( checked.length > 0 ||
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// or indeterminate
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siblings.filter(isIndeterminate).length > 0 ) {
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this.setIndeterminate(parent, true);
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}
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// else none are checked
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else {
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parentChecked = false;
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}
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// update the parent
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if( parentChecked !== null ) this.setChecked(parent, parentChecked);
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// and go up the tree if it changed
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if( oldValue !== this.getValue(parent) ) this.processParents(parent);
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}
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function isIndeterminate() {
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return $(this).prop('indeterminate');
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}
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},
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setChecked: function( checkbox, value, event ) {
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$(checkbox).prop({
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checked: value,
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indeterminate: false
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});
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if( !event || !event.doneIds || event.doneIds.indexOf(checkbox.id) == -1 ) {
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event = event || {type: 'change'};
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event.doneIds = event.doneIds || [];
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event.doneIds.push(checkbox.id);
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$(checkbox).trigger(event);
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}
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},
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setIndeterminate: function( checkbox, value ) {
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$(checkbox).prop({
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indeterminate: value,
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checked: null
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});
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},
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getSiblings: function( checkbox, listItem ) {
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listItem = listItem || checkbox.parents(this.itemSelector).get(1);
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return $('> ol > li > input[type=checkbox], > ul > li > input[type=checkbox]', listItem);
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},
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getValue: function( checkbox ) {
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return $(checkbox).prop('indeterminate') ? null : $(checkbox).prop('checked');
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}
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};
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}(jQuery));
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