select2.sortable.js

Author: kprovance

select2.sortable.js

@@ -0,0 +1,146 @@
+/**
+ * jQuery Select2 Sortable
+ * - enable select2 to be sortable via normal select element
+ * 
+ * author      : Vafour
+ * modified    : Kevin Provance (kprovance)
+ * inspired by : jQuery Chosen Sortable (https://github.com/mrhenry/jquery-chosen-sortable)
+ * License     : GPL
+ */
+
+(function ($) {
+    $.fn.extend({
+        select2SortableOrder: function () {
+            var $this = this.filter('[multiple]');
+
+            $this.each(function () {
+                var $select = $(this);
+
+                // skip elements not select2-ed
+                if (typeof ($select.data('select2')) !== 'object') {
+                    return false;
+                }
+
+                var $select2 = $select.siblings('.select2-container');
+                var sorted;
+
+                // Opt group names
+                var optArr = [];
+                
+                $select.find('optgroup').each(function(idx, val) {
+                    optArr.push (val);
+                });
+                
+                $select.find('option').each(function(idx, val) {
+                    var groupName = $(this).parent('optgroup').prop('label');
+                    var optVal = this;
+                    
+                    if (groupName === undefined) {
+                        if (this.value !== '' && !this.selected) {
+                            optArr.push (optVal);
+                        }
+                    }
+                });
+                
+                sorted = $($select2.find('.select2-choices li[class!="select2-search-field"]').map(function () {
+                    if (!this) {
+                        return undefined;
+                    }
+                    
+                    var id = $(this).data('select2Data').id;
+
+                    return $select.find('option[value="' + id + '"]')[0];
+                }));
+ 
+                 sorted.push.apply(sorted, optArr);
+                
+                $select.children().remove();
+                $select.append(sorted);
+              });
+
+            return $this;
+        },
+        
+        select2Sortable: function () {
+            var args = Array.prototype.slice.call(arguments, 0);
+            $this = this.filter('[multiple]'),
+                    validMethods = ['destroy'];
+
+            if (args.length === 0 || typeof (args[0]) === 'object') {
+                var defaultOptions = {
+                    bindOrder: 'formSubmit', // or sortableStop
+                    sortableOptions: {
+                        placeholder: 'ui-state-highlight',
+                        items: 'li:not(.select2-search-field)',
+                        tolerance: 'pointer'
+                    }
+                };
+                
+                var options = $.extend(defaultOptions, args[0]);
+
+                // Init select2 only if not already initialized to prevent select2 configuration loss
+                if (typeof ($this.data('select2')) !== 'object') {
+                    $this.select2();
+                }
+
+                $this.each(function () {
+                    var $select = $(this)
+                    var $select2choices = $select.siblings('.select2-container').find('.select2-choices');
+
+                    // Init jQuery UI Sortable
+                    $select2choices.sortable(options.sortableOptions);
+
+                    switch (options.bindOrder) {
+                        case 'sortableStop':
+                            // apply options ordering in sortstop event
+                            $select2choices.on("sortstop.select2sortable", function (event, ui) {
+                                $select.select2SortableOrder();
+                            });
+                            
+                            $select.on('change', function (e) {
+                                $(this).select2SortableOrder();
+                            });
+                        break;
+                        
+                        default:
+                            // apply options ordering in form submit
+                            $select.closest('form').unbind('submit.select2sortable').on('submit.select2sortable', function () {
+                                $select.select2SortableOrder();
+                            });
+                        break;
+                    }
+                });
+            }
+            else if (typeof (args[0] === 'string')) {
+                if ($.inArray(args[0], validMethods) == -1) {
+                    throw "Unknown method: " + args[0];
+                }
+                
+                if (args[0] === 'destroy') {
+                    $this.select2SortableDestroy();
+                }
+            }
+            
+            return $this;
+        },
+        
+        select2SortableDestroy: function () {
+            var $this = this.filter('[multiple]');
+            $this.each(function () {
+                var $select = $(this)
+                var $select2choices = $select.parent().find('.select2-choices');
+
+                // unbind form submit event
+                $select.closest('form').unbind('submit.select2sortable');
+
+                // unbind sortstop event
+                $select2choices.unbind("sortstop.select2sortable");
+
+                // destroy select2Sortable
+                $select2choices.sortable('destroy');
+            });
+            
+            return $this;
+        }
+    });
+}(jQuery));