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/*
* Ext JS Library 2.0.2
* Copyright(c) 2006-2008, Ext JS, LLC.
* licensing@extjs.com
*
* http://extjs.com/license
*/
 
/**
* @class Ext.data.Store
* @extends Ext.util.Observable
* The Store class encapsulates a client side cache of {@link Ext.data.Record Record}
* objects which provide input data for Components such as the {@link Ext.grid.GridPanel GridPanel},
* the {@link Ext.form.ComboBox ComboBox}, or the {@link Ext.DataView DataView}</p>
* <p>A Store object uses its {@link #proxy configured} implementation of {@link Ext.data.DataProxy DataProxy}
* to access a data object unless you call {@link #loadData} directly and pass in your data.</p>
* <p>A Store object has no knowledge of the format of the data returned by the Proxy.</p>
* <p>A Store object uses its {@link #reader configured} implementation of {@link Ext.data.DataReader DataReader}
* to create {@link Ext.data.Record Record} instances from the data object. These Records
* are cached and made available through accessor functions.</p>
* @constructor
* Creates a new Store.
* @param {Object} config A config object containing the objects needed for the Store to access data,
* and read the data into Records.
*/
Ext.data.Store = function(config){
this.data = new Ext.util.MixedCollection(false);
this.data.getKey = function(o){
return o.id;
};
/**
* An object containing properties which are used as parameters on any HTTP request.
* @property
*/
this.baseParams = {};
// private
this.paramNames = {
"start" : "start",
"limit" : "limit",
"sort" : "sort",
"dir" : "dir"
};
 
if(config && config.data){
this.inlineData = config.data;
delete config.data;
}
 
Ext.apply(this, config);
 
if(this.url && !this.proxy){
this.proxy = new Ext.data.HttpProxy({url: this.url});
}
 
if(this.reader){ // reader passed
if(!this.recordType){
this.recordType = this.reader.recordType;
}
if(this.reader.onMetaChange){
this.reader.onMetaChange = this.onMetaChange.createDelegate(this);
}
}
 
if(this.recordType){
this.fields = this.recordType.prototype.fields;
}
this.modified = [];
 
this.addEvents(
/**
* @event datachanged
* Fires when the data cache has changed, and a widget which is using this Store
* as a Record cache should refresh its view.
* @param {Store} this
*/
'datachanged',
/**
* @event metachange
* Fires when this store's reader provides new metadata (fields). This is currently only supported for JsonReaders.
* @param {Store} this
* @param {Object} meta The JSON metadata
*/
'metachange',
/**
* @event add
* Fires when Records have been added to the Store
* @param {Store} this
* @param {Ext.data.Record[]} records The array of Records added
* @param {Number} index The index at which the record(s) were added
*/
'add',
/**
* @event remove
* Fires when a Record has been removed from the Store
* @param {Store} this
* @param {Ext.data.Record} record The Record that was removed
* @param {Number} index The index at which the record was removed
*/
'remove',
/**
* @event update
* Fires when a Record has been updated
* @param {Store} this
* @param {Ext.data.Record} record The Record that was updated
* @param {String} operation The update operation being performed. Value may be one of:
* <pre><code>
Ext.data.Record.EDIT
Ext.data.Record.REJECT
Ext.data.Record.COMMIT
* </code></pre>
*/
'update',
/**
* @event clear
* Fires when the data cache has been cleared.
* @param {Store} this
*/
'clear',
/**
* @event beforeload
* Fires before a request is made for a new data object. If the beforeload handler returns false
* the load action will be canceled.
* @param {Store} this
* @param {Object} options The loading options that were specified (see {@link #load} for details)
*/
'beforeload',
/**
* @event load
* Fires after a new set of Records has been loaded.
* @param {Store} this
* @param {Ext.data.Record[]} records The Records that were loaded
* @param {Object} options The loading options that were specified (see {@link #load} for details)
*/
'load',
/**
* @event loadexception
* Fires if an exception occurs in the Proxy during loading.
* Called with the signature of the Proxy's "loadexception" event.
*/
'loadexception'
);
 
if(this.proxy){
this.relayEvents(this.proxy, ["loadexception"]);
}
this.sortToggle = {};
if(this.sortInfo){
this.setDefaultSort(this.sortInfo.field, this.sortInfo.direction);
}
Ext.data.Store.superclass.constructor.call(this);
 
if(this.storeId || this.id){
Ext.StoreMgr.register(this);
}
if(this.inlineData){
this.loadData(this.inlineData);
delete this.inlineData;
}else if(this.autoLoad){
this.load.defer(10, this, [
typeof this.autoLoad == 'object' ?
this.autoLoad : undefined]);
}
};
Ext.extend(Ext.data.Store, Ext.util.Observable, {
/**
* @cfg {String} storeId If passed, the id to use to register with the StoreMgr
*/
/**
* @cfg {String} url If passed, an HttpProxy is created for the passed URL
*/
/**
* @cfg {Boolean/Object} autoLoad If passed, this store's load method is automatically called after creation with the autoLoad object
*/
/**
* @cfg {Ext.data.DataProxy} proxy The Proxy object which provides access to a data object.
*/
/**
* @cfg {Array} data Inline data to be loaded when the store is initialized.
*/
/**
* @cfg {Ext.data.DataReader} reader The DataReader object which processes the data object and returns
* an Array of Ext.data.Record objects which are cached keyed by their <em>id</em> property.
*/
/**
* @cfg {Object} baseParams An object containing properties which are to be sent as parameters
* on any HTTP request
*/
/**
* @cfg {Object} sortInfo A config object in the format: {field: "fieldName", direction: "ASC|DESC"}. The direction
* property is case-sensitive.
*/
/**
* @cfg {boolean} remoteSort True if sorting is to be handled by requesting the
* Proxy to provide a refreshed version of the data object in sorted order, as
* opposed to sorting the Record cache in place (defaults to false).
* <p>If remote sorting is specified, then clicking on a column header causes the
* current page to be requested from the server with the addition of the following
* two parameters:
* <div class="mdetail-params"><ul>
* <li><b>sort</b> : String<p class="sub-desc">The name (as specified in
* the Record's Field definition) of the field to sort on.</p></li>
* <li><b>dir</b> : String<p class="sub-desc">The direction of the sort, "ASC" or "DESC" (case-sensitive).</p></li>
* </ul></div></p>
*/
remoteSort : false,
 
/**
* @cfg {boolean} pruneModifiedRecords True to clear all modified record information each time the store is
* loaded or when a record is removed. (defaults to false).
*/
pruneModifiedRecords : false,
 
/**
* Contains the last options object used as the parameter to the load method. See {@link #load}
* for the details of what this may contain. This may be useful for accessing any params which
* were used to load the current Record cache.
* @property
*/
lastOptions : null,
 
destroy : function(){
if(this.id){
Ext.StoreMgr.unregister(this);
}
this.data = null;
this.purgeListeners();
},
 
/**
* Add Records to the Store and fires the add event.
* @param {Ext.data.Record[]} records An Array of Ext.data.Record objects to add to the cache.
*/
add : function(records){
records = [].concat(records);
if(records.length < 1){
return;
}
for(var i = 0, len = records.length; i < len; i++){
records[i].join(this);
}
var index = this.data.length;
this.data.addAll(records);
if(this.snapshot){
this.snapshot.addAll(records);
}
this.fireEvent("add", this, records, index);
},
 
/**
* (Local sort only) Inserts the passed the record in the Store at the index where it
* should go based on the current sort information
* @param {Ext.data.Record} record
*/
addSorted : function(record){
var index = this.findInsertIndex(record);
this.insert(index, record);
},
 
/**
* Remove a Record from the Store and fires the remove event.
* @param {Ext.data.Record} record Th Ext.data.Record object to remove from the cache.
*/
remove : function(record){
var index = this.data.indexOf(record);
this.data.removeAt(index);
if(this.pruneModifiedRecords){
this.modified.remove(record);
}
if(this.snapshot){
this.snapshot.remove(record);
}
this.fireEvent("remove", this, record, index);
},
 
/**
* Remove all Records from the Store and fires the clear event.
*/
removeAll : function(){
this.data.clear();
if(this.snapshot){
this.snapshot.clear();
}
if(this.pruneModifiedRecords){
this.modified = [];
}
this.fireEvent("clear", this);
},
 
/**
* Inserts Records to the Store at the given index and fires the add event.
* @param {Number} index The start index at which to insert the passed Records.
* @param {Ext.data.Record[]} records An Array of Ext.data.Record objects to add to the cache.
*/
insert : function(index, records){
records = [].concat(records);
for(var i = 0, len = records.length; i < len; i++){
this.data.insert(index, records[i]);
records[i].join(this);
}
this.fireEvent("add", this, records, index);
},
 
/**
* Get the index within the cache of the passed Record.
* @param {Ext.data.Record} record The Ext.data.Record object to to find.
* @return {Number} The index of the passed Record. Returns -1 if not found.
*/
indexOf : function(record){
return this.data.indexOf(record);
},
 
/**
* Get the index within the cache of the Record with the passed id.
* @param {String} id The id of the Record to find.
* @return {Number} The index of the Record. Returns -1 if not found.
*/
indexOfId : function(id){
return this.data.indexOfKey(id);
},
 
/**
* Get the Record with the specified id.
* @param {String} id The id of the Record to find.
* @return {Ext.data.Record} The Record with the passed id. Returns undefined if not found.
*/
getById : function(id){
return this.data.key(id);
},
 
/**
* Get the Record at the specified index.
* @param {Number} index The index of the Record to find.
* @return {Ext.data.Record} The Record at the passed index. Returns undefined if not found.
*/
getAt : function(index){
return this.data.itemAt(index);
},
 
/**
* Returns a range of Records between specified indices.
* @param {Number} startIndex (optional) The starting index (defaults to 0)
* @param {Number} endIndex (optional) The ending index (defaults to the last Record in the Store)
* @return {Ext.data.Record[]} An array of Records
*/
getRange : function(start, end){
return this.data.getRange(start, end);
},
 
// private
storeOptions : function(o){
o = Ext.apply({}, o);
delete o.callback;
delete o.scope;
this.lastOptions = o;
},
 
/**
* Loads the Record cache from the configured Proxy using the configured Reader.
* <p>If using remote paging, then the first load call must specify the <tt>start</tt>
* and <tt>limit</tt> properties in the options.params property to establish the initial
* position within the dataset, and the number of Records to cache on each read from the Proxy.</p>
* <p><b>It is important to note that for remote data sources, loading is asynchronous,
* and this call will return before the new data has been loaded. Perform any post-processing
* in a callback function, or in a "load" event handler.</b></p>
* @param {Object} options An object containing properties which control loading options:<ul>
* <li><b>params</b> :Object<p class="sub-desc">An object containing properties to pass as HTTP parameters to a remote data source.</p></li>
* <li><b>callback</b> : Function<p class="sub-desc">A function to be called after the Records have been loaded. The callback is
* passed the following arguments:<ul>
* <li>r : Ext.data.Record[]</li>
* <li>options: Options object from the load call</li>
* <li>success: Boolean success indicator</li></ul></p></li>
* <li><b>scope</b> : Object<p class="sub-desc">Scope with which to call the callback (defaults to the Store object)</p></li>
* <li><b>add</b> : Boolean<p class="sub-desc">Indicator to append loaded records rather than replace the current cache.</p></li>
* </ul>
* @return {Boolean} Whether the load fired (if beforeload failed).
*/
load : function(options){
options = options || {};
if(this.fireEvent("beforeload", this, options) !== false){
this.storeOptions(options);
var p = Ext.apply(options.params || {}, this.baseParams);
if(this.sortInfo && this.remoteSort){
var pn = this.paramNames;
p[pn["sort"]] = this.sortInfo.field;
p[pn["dir"]] = this.sortInfo.direction;
}
this.proxy.load(p, this.reader, this.loadRecords, this, options);
return true;
} else {
return false;
}
},
 
/**
* Reloads the Record cache from the configured Proxy using the configured Reader and
* the options from the last load operation performed.
* @param {Object} options (optional) An object containing properties which may override the options
* used in the last load operation. See {@link #load} for details (defaults to null, in which case
* the most recently used options are reused).
*/
reload : function(options){
this.load(Ext.applyIf(options||{}, this.lastOptions));
},
 
// private
// Called as a callback by the Reader during a load operation.
loadRecords : function(o, options, success){
if(!o || success === false){
if(success !== false){
this.fireEvent("load", this, [], options);
}
if(options.callback){
options.callback.call(options.scope || this, [], options, false);
}
return;
}
var r = o.records, t = o.totalRecords || r.length;
if(!options || options.add !== true){
if(this.pruneModifiedRecords){
this.modified = [];
}
for(var i = 0, len = r.length; i < len; i++){
r[i].join(this);
}
if(this.snapshot){
this.data = this.snapshot;
delete this.snapshot;
}
this.data.clear();
this.data.addAll(r);
this.totalLength = t;
this.applySort();
this.fireEvent("datachanged", this);
}else{
this.totalLength = Math.max(t, this.data.length+r.length);
this.add(r);
}
this.fireEvent("load", this, r, options);
if(options.callback){
options.callback.call(options.scope || this, r, options, true);
}
},
 
/**
* Loads data from a passed data block. A Reader which understands the format of the data
* must have been configured in the constructor.
* @param {Object} data The data block from which to read the Records. The format of the data expected
* is dependent on the type of Reader that is configured and should correspond to that Reader's readRecords parameter.
* @param {Boolean} append (Optional) True to append the new Records rather than replace the existing cache.
*/
loadData : function(o, append){
var r = this.reader.readRecords(o);
this.loadRecords(r, {add: append}, true);
},
 
/**
* Gets the number of cached records.
* <p>If using paging, this may not be the total size of the dataset. If the data object
* used by the Reader contains the dataset size, then the {@link #getTotalCount} function returns
* the dataset size.</p>
* @return {Number} The number of Records in the Store's cache.
*/
getCount : function(){
return this.data.length || 0;
},
 
/**
* Gets the total number of records in the dataset as returned by the server.
* <p>If using paging, for this to be accurate, the data object used by the Reader must contain
* the dataset size. For remote data sources, this is provided by a query on the server.</p>
* @return {Number} The number of Records as specified in the data object passed to the Reader
* by the Proxy
* <p><b>This value is not updated when changing the contents of the Store locally.</b></p>
*/
getTotalCount : function(){
return this.totalLength || 0;
},
 
/**
* Returns an object describing the current sort state of this Store.
* @return {Object} The sort state of the Store. An object with two properties:<ul>
* <li><b>field : String<p class="sub-desc">The name of the field by which the Records are sorted.</p></li>
* <li><b>direction : String<p class="sub-desc">The sort order, "ASC" or "DESC" (case-sensitive).</p></li>
* </ul>
*/
getSortState : function(){
return this.sortInfo;
},
 
// private
applySort : function(){
if(this.sortInfo && !this.remoteSort){
var s = this.sortInfo, f = s.field;
this.sortData(f, s.direction);
}
},
 
// private
sortData : function(f, direction){
direction = direction || 'ASC';
var st = this.fields.get(f).sortType;
var fn = function(r1, r2){
var v1 = st(r1.data[f]), v2 = st(r2.data[f]);
return v1 > v2 ? 1 : (v1 < v2 ? -1 : 0);
};
this.data.sort(direction, fn);
if(this.snapshot && this.snapshot != this.data){
this.snapshot.sort(direction, fn);
}
},
 
/**
* Sets the default sort column and order to be used by the next load operation.
* @param {String} fieldName The name of the field to sort by.
* @param {String} dir (optional) The sort order, "ASC" or "DESC" (case-sensitive, defaults to "ASC")
*/
setDefaultSort : function(field, dir){
dir = dir ? dir.toUpperCase() : "ASC";
this.sortInfo = {field: field, direction: dir};
this.sortToggle[field] = dir;
},
 
/**
* Sort the Records.
* If remote sorting is used, the sort is performed on the server, and the cache is
* reloaded. If local sorting is used, the cache is sorted internally.
* @param {String} fieldName The name of the field to sort by.
* @param {String} dir (optional) The sort order, "ASC" or "DESC" (case-sensitive, defaults to "ASC")
*/
sort : function(fieldName, dir){
var f = this.fields.get(fieldName);
if(!f){
return false;
}
if(!dir){
if(this.sortInfo && this.sortInfo.field == f.name){ // toggle sort dir
dir = (this.sortToggle[f.name] || "ASC").toggle("ASC", "DESC");
}else{
dir = f.sortDir;
}
}
var st = (this.sortToggle) ? this.sortToggle[f.name] : null;
var si = (this.sortInfo) ? this.sortInfo : null;
this.sortToggle[f.name] = dir;
this.sortInfo = {field: f.name, direction: dir};
if(!this.remoteSort){
this.applySort();
this.fireEvent("datachanged", this);
}else{
if (!this.load(this.lastOptions)) {
if (st) {
this.sortToggle[f.name] = st;
}
if (si) {
this.sortInfo = si;
}
}
}
},
 
/**
* Calls the specified function for each of the Records in the cache.
* @param {Function} fn The function to call. The Record is passed as the first parameter.
* Returning <tt>false</tt> aborts and exits the iteration.
* @param {Object} scope (optional) The scope in which to call the function (defaults to the Record).
*/
each : function(fn, scope){
this.data.each(fn, scope);
},
 
/**
* Gets all records modified since the last commit. Modified records are persisted across load operations
* (e.g., during paging).
* @return {Ext.data.Record[]} An array of Records containing outstanding modifications.
*/
getModifiedRecords : function(){
return this.modified;
},
 
// private
createFilterFn : function(property, value, anyMatch, caseSensitive){
if(Ext.isEmpty(value, false)){
return false;
}
value = this.data.createValueMatcher(value, anyMatch, caseSensitive);
return function(r){
return value.test(r.data[property]);
};
},
 
/**
* Sums the value of <i>property</i> for each record between start and end and returns the result.
* @param {String} property A field on your records
* @param {Number} start The record index to start at (defaults to 0)
* @param {Number} end The last record index to include (defaults to length - 1)
* @return {Number} The sum
*/
sum : function(property, start, end){
var rs = this.data.items, v = 0;
start = start || 0;
end = (end || end === 0) ? end : rs.length-1;
 
for(var i = start; i <= end; i++){
v += (rs[i].data[property] || 0);
}
return v;
},
 
/**
* Filter the records by a specified property.
* @param {String} field A field on your records
* @param {String/RegExp} value Either a string that the field
* should start with or a RegExp to test against the field
* @param {Boolean} anyMatch (optional) True to match any part not just the beginning
* @param {Boolean} caseSensitive (optional) True for case sensitive comparison
*/
filter : function(property, value, anyMatch, caseSensitive){
var fn = this.createFilterFn(property, value, anyMatch, caseSensitive);
return fn ? this.filterBy(fn) : this.clearFilter();
},
 
/**
* Filter by a function. The specified function will be called for each
* Record in this Store. If the function returns <tt>true</tt> the Record is included,
* otherwise it is filtered out.
* @param {Function} fn The function to be called. It will be passed the following parameters:<ul>
* <li><b>record</b> : Ext.data.Record<p class="sub-desc">The {@link Ext.data.Record record}
* to test for filtering. Access field values using {@link Ext.data.Record#get}.</p></li>
* <li><b>id</b> : Object<p class="sub-desc">The ID of the Record passed.</p></li>
* </ul>
* @param {Object} scope (optional) The scope of the function (defaults to this)
*/
filterBy : function(fn, scope){
this.snapshot = this.snapshot || this.data;
this.data = this.queryBy(fn, scope||this);
this.fireEvent("datachanged", this);
},
 
/**
* Query the records by a specified property.
* @param {String} field A field on your records
* @param {String/RegExp} value Either a string that the field
* should start with or a RegExp to test against the field
* @param {Boolean} anyMatch (optional) True to match any part not just the beginning
* @param {Boolean} caseSensitive (optional) True for case sensitive comparison
* @return {MixedCollection} Returns an Ext.util.MixedCollection of the matched records
*/
query : function(property, value, anyMatch, caseSensitive){
var fn = this.createFilterFn(property, value, anyMatch, caseSensitive);
return fn ? this.queryBy(fn) : this.data.clone();
},
 
/**
* Query the cached records in this Store using a filtering function. The specified function
* will be called with each record in this Store. If the function returns <tt>true</tt> the record is
* included in the results.
* @param {Function} fn The function to be called. It will be passed the following parameters:<ul>
* <li><b>record</b> : Ext.data.Record<p class="sub-desc">The {@link Ext.data.Record record}
* to test for filtering. Access field values using {@link Ext.data.Record#get}.</p></li>
* <li><b>id</b> : Object<p class="sub-desc">The ID of the Record passed.</p></li>
* </ul>
* @param {Object} scope (optional) The scope of the function (defaults to this)
* @return {MixedCollection} Returns an Ext.util.MixedCollection of the matched records
**/
queryBy : function(fn, scope){
var data = this.snapshot || this.data;
return data.filterBy(fn, scope||this);
},
 
/**
* Finds the index of the first matching record in this store by a specific property/value.
* @param {String} property A property on your objects
* @param {String/RegExp} value Either string that the property values
* should start with or a RegExp to test against the property.
* @param {Number} startIndex (optional) The index to start searching at
* @param {Boolean} anyMatch (optional) True to match any part of the string, not just the beginning
* @param {Boolean} caseSensitive (optional) True for case sensitive comparison
* @return {Number} The matched index or -1
*/
find : function(property, value, start, anyMatch, caseSensitive){
var fn = this.createFilterFn(property, value, anyMatch, caseSensitive);
return fn ? this.data.findIndexBy(fn, null, start) : -1;
},
 
/**
* Find the index of the first matching Record in this Store by a function.
* If the function returns <tt>true</tt> it is considered a match.
* @param {Function} fn The function to be called. It will be passed the following parameters:<ul>
* <li><b>record</b> : Ext.data.Record<p class="sub-desc">The {@link Ext.data.Record record}
* to test for filtering. Access field values using {@link Ext.data.Record#get}.</p></li>
* <li><b>id</b> : Object<p class="sub-desc">The ID of the Record passed.</p></li>
* </ul>
* @param {Object} scope (optional) The scope of the function (defaults to this)
* @param {Number} startIndex (optional) The index to start searching at
* @return {Number} The matched index or -1
*/
findBy : function(fn, scope, start){
return this.data.findIndexBy(fn, scope, start);
},
 
/**
* Collects unique values for a particular dataIndex from this store.
* @param {String} dataIndex The property to collect
* @param {Boolean} allowNull (optional) Pass true to allow null, undefined or empty string values
* @param {Boolean} bypassFilter (optional) Pass true to collect from all records, even ones which are filtered
* @return {Array} An array of the unique values
**/
collect : function(dataIndex, allowNull, bypassFilter){
var d = (bypassFilter === true && this.snapshot) ?
this.snapshot.items : this.data.items;
var v, sv, r = [], l = {};
for(var i = 0, len = d.length; i < len; i++){
v = d[i].data[dataIndex];
sv = String(v);
if((allowNull || !Ext.isEmpty(v)) && !l[sv]){
l[sv] = true;
r[r.length] = v;
}
}
return r;
},
 
/**
* Revert to a view of the Record cache with no filtering applied.
* @param {Boolean} suppressEvent If true the filter is cleared silently without notifying listeners
*/
clearFilter : function(suppressEvent){
if(this.isFiltered()){
this.data = this.snapshot;
delete this.snapshot;
if(suppressEvent !== true){
this.fireEvent("datachanged", this);
}
}
},
 
/**
* Returns true if this store is currently filtered
* @return {Boolean}
*/
isFiltered : function(){
return this.snapshot && this.snapshot != this.data;
},
 
// private
afterEdit : function(record){
if(this.modified.indexOf(record) == -1){
this.modified.push(record);
}
this.fireEvent("update", this, record, Ext.data.Record.EDIT);
},
 
// private
afterReject : function(record){
this.modified.remove(record);
this.fireEvent("update", this, record, Ext.data.Record.REJECT);
},
 
// private
afterCommit : function(record){
this.modified.remove(record);
this.fireEvent("update", this, record, Ext.data.Record.COMMIT);
},
 
/**
* Commit all Records with outstanding changes. To handle updates for changes, subscribe to the
* Store's "update" event, and perform updating when the third parameter is Ext.data.Record.COMMIT.
*/
commitChanges : function(){
var m = this.modified.slice(0);
this.modified = [];
for(var i = 0, len = m.length; i < len; i++){
m[i].commit();
}
},
 
/**
* Cancel outstanding changes on all changed records.
*/
rejectChanges : function(){
var m = this.modified.slice(0);
this.modified = [];
for(var i = 0, len = m.length; i < len; i++){
m[i].reject();
}
},
 
// private
onMetaChange : function(meta, rtype, o){
this.recordType = rtype;
this.fields = rtype.prototype.fields;
delete this.snapshot;
this.sortInfo = meta.sortInfo;
this.modified = [];
this.fireEvent('metachange', this, this.reader.meta);
},
 
// private
findInsertIndex : function(record){
this.suspendEvents();
var data = this.data.clone();
this.data.add(record);
this.applySort();
var index = this.data.indexOf(record);
this.data = data;
this.resumeEvents();
return index;
}
});