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9 <pre class="prettyprint lang-js">/*!
10 * Ext JS Library 3.2.0
11 * Copyright(c) 2006-2010 Ext JS, Inc.
13 * http://www.extjs.com/license
15 <div id="cls-Ext.data.GroupingStore"></div>/**
16 * @class Ext.data.GroupingStore
17 * @extends Ext.data.Store
18 * A specialized store implementation that provides for grouping records by one of the available fields. This
19 * is usually used in conjunction with an {@link Ext.grid.GroupingView} to provide the data model for
20 * a grouped GridPanel.
22 * Internally, GroupingStore is simply a normal Store with multi sorting enabled from the start. The grouping field
23 * and direction are always injected as the first sorter pair. GroupingView picks up on the configured groupField and
24 * builds grid rows appropriately.
27 * Creates a new GroupingStore.
28 * @param {Object} config A config object containing the objects needed for the Store to access data,
29 * and read the data into Records.
30 * @xtype groupingstore
32 Ext.data.GroupingStore = Ext.extend(Ext.data.Store, {
35 constructor: function(config) {
36 config = config || {};
38 //We do some preprocessing here to massage the grouping + sorting options into a single
39 //multi sort array. If grouping and sorting options are both presented to the constructor,
40 //the sorters array consists of the grouping sorter object followed by the sorting sorter object
41 //see Ext.data.Store's sorting functions for details about how multi sorting works
42 this.hasMultiSort = true;
43 this.multiSortInfo = this.multiSortInfo || {sorters: []};
45 var sorters = this.multiSortInfo.sorters,
46 groupField = config.groupField || this.groupField,
47 sortInfo = config.sortInfo || this.sortInfo,
48 groupDir = config.groupDir || this.groupDir;
50 //add the grouping sorter object first
58 //add the sorting sorter object if it is present
60 sorters.push(sortInfo);
63 Ext.data.GroupingStore.superclass.constructor.call(this, config);
66 <div id="event-Ext.data.GroupingStore-groupchange"></div>/**
68 * Fired whenever a call to store.groupBy successfully changes the grouping on the store
69 * @param {Ext.data.GroupingStore} store The grouping store
70 * @param {String} groupField The field that the store is now grouped by
75 this.applyGroupField();
78 <div id="cfg-Ext.data.GroupingStore-groupField"></div>/**
79 * @cfg {String} groupField
80 * The field name by which to sort the store's data (defaults to '').
82 <div id="cfg-Ext.data.GroupingStore-remoteGroup"></div>/**
83 * @cfg {Boolean} remoteGroup
84 * True if the grouping should apply on the server side, false if it is local only (defaults to false). If the
85 * grouping is local, it can be applied immediately to the data. If it is remote, then it will simply act as a
86 * helper, automatically sending the grouping field name as the 'groupBy' param with each XHR call.
89 <div id="cfg-Ext.data.GroupingStore-groupOnSort"></div>/**
90 * @cfg {Boolean} groupOnSort
91 * True to sort the data on the grouping field when a grouping operation occurs, false to sort based on the
92 * existing sort info (defaults to false).
98 <div id="method-Ext.data.GroupingStore-clearGrouping"></div>/**
99 * Clears any existing grouping and refreshes the data using the default sort.
101 clearGrouping : function(){
102 this.groupField = false;
104 if(this.remoteGroup){
106 delete this.baseParams.groupBy;
107 delete this.baseParams.groupDir;
109 var lo = this.lastOptions;
111 delete lo.params.groupBy;
112 delete lo.params.groupDir;
118 this.fireEvent('datachanged', this);
122 <div id="method-Ext.data.GroupingStore-groupBy"></div>/**
123 * Groups the data by the specified field.
124 * @param {String} field The field name by which to sort the store's data
125 * @param {Boolean} forceRegroup (optional) True to force the group to be refreshed even if the field passed
126 * in is the same as the current grouping field, false to skip grouping on the same field (defaults to false)
128 groupBy : function(field, forceRegroup, direction) {
129 direction = direction ? (String(direction).toUpperCase() == 'DESC' ? 'DESC' : 'ASC') : this.groupDir;
131 if (this.groupField == field && this.groupDir == direction && !forceRegroup) {
132 return; // already grouped by this field
135 //check the contents of the first sorter. If the field matches the CURRENT groupField (before it is set to the new one),
136 //remove the sorter as it is actually the grouper. The new grouper is added back in by this.sort
137 sorters = this.multiSortInfo.sorters;
138 if (sorters.length > 0 && sorters[0].field == this.groupField) {
142 this.groupField = field;
143 this.groupDir = direction;
144 this.applyGroupField();
146 var fireGroupEvent = function() {
147 this.fireEvent('groupchange', this, this.getGroupState());
150 if (this.groupOnSort) {
151 this.sort(field, direction);
152 fireGroupEvent.call(this);
156 if (this.remoteGroup) {
157 this.on('load', fireGroupEvent, this, {single: true});
161 fireGroupEvent.call(this);
165 //GroupingStore always uses multisorting so we intercept calls to sort here to make sure that our grouping sorter object
166 //is always injected first.
167 sort : function(fieldName, dir) {
168 if (this.remoteSort) {
169 return Ext.data.GroupingStore.superclass.sort.call(this, fieldName, dir);
174 //cater for any existing valid arguments to this.sort, massage them into an array of sorter objects
175 if (Ext.isArray(arguments[0])) {
176 sorters = arguments[0];
177 } else if (fieldName == undefined) {
178 //we preserve the existing sortInfo here because this.sort is called after
179 //clearGrouping and there may be existing sorting
180 sorters = [this.sortInfo];
182 //TODO: this is lifted straight from Ext.data.Store's singleSort function. It should instead be
183 //refactored into a common method if possible
184 var field = this.fields.get(fieldName);
185 if (!field) return false;
187 var name = field.name,
188 sortInfo = this.sortInfo || null,
189 sortToggle = this.sortToggle ? this.sortToggle[name] : null;
192 if (sortInfo && sortInfo.field == name) { // toggle sort dir
193 dir = (this.sortToggle[name] || 'ASC').toggle('ASC', 'DESC');
199 this.sortToggle[name] = dir;
200 this.sortInfo = {field: name, direction: dir};
202 sorters = [this.sortInfo];
205 //add the grouping sorter object as the first multisort sorter
206 if (this.groupField) {
207 sorters.unshift({direction: this.groupDir, field: this.groupField});
210 return this.multiSort.call(this, sorters, dir);
215 * Saves the current grouping field and direction to this.baseParams and this.lastOptions.params
216 * if we're using remote grouping. Does not actually perform any grouping - just stores values
218 applyGroupField: function(){
219 if (this.remoteGroup) {
220 if(!this.baseParams){
221 this.baseParams = {};
224 Ext.apply(this.baseParams, {
225 groupBy : this.groupField,
226 groupDir: this.groupDir
229 var lo = this.lastOptions;
230 if (lo && lo.params) {
231 lo.params.groupDir = this.groupDir;
233 //this is deleted because of a bug reported at http://www.extjs.com/forum/showthread.php?t=82907
234 delete lo.params.groupBy;
241 * TODO: This function is apparently never invoked anywhere in the framework. It has no documentation
242 * and should be considered for deletion
244 applyGrouping : function(alwaysFireChange){
245 if(this.groupField !== false){
246 this.groupBy(this.groupField, true, this.groupDir);
249 if(alwaysFireChange === true){
250 this.fireEvent('datachanged', this);
258 * Returns the grouping field that should be used. If groupOnSort is used this will be sortInfo's field,
259 * otherwise it will be this.groupField
260 * @return {String} The group field
262 getGroupState : function(){
263 return this.groupOnSort && this.groupField !== false ?
264 (this.sortInfo ? this.sortInfo.field : undefined) : this.groupField;
267 Ext.reg('groupingstore', Ext.data.GroupingStore);