New feature: basic Ajax suggestion for tags and implementation of Dojo toolkit

git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f

1 files changed, 762 insertions, 0 deletions

diff --git a/includes/js/dojox/grid/_data/model.js b/includes/js/dojox/grid/_data/model.js
new file mode 100644
index 0000000..c9bfcfa
--- /dev/null
+++ b/includes/js/dojox/grid/_data/model.js
@@ -0,0 +1,762 @@
+if(!dojo._hasResource['dojox.grid._data.model']){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource['dojox.grid._data.model'] = true;
+dojo.provide('dojox.grid._data.model');
+dojo.require('dojox.grid._data.fields');
+
+dojo.declare("dojox.grid.data.Model", null, {
+	// summary:
+	//	Base abstract grid data model.
+	//	Makes no assumptions about the structure of grid data.
+	constructor: function(inFields, inData){
+		this.observers = [];
+		this.fields = new dojox.grid.data.Fields();
+		if(inFields){
+			this.fields.set(inFields);
+		}
+		this.setData(inData);
+	},
+	count: 0,
+	updating: 0,
+	// observers 
+	observer: function(inObserver, inPrefix){
+		this.observers.push({o: inObserver, p: inPrefix||'model' });
+	},
+	notObserver: function(inObserver){
+		for(var i=0, m, o; (o=this.observers[i]); i++){
+			if(o.o==inObserver){
+				this.observers.splice(i, 1);
+				return;
+			}
+		}
+	},
+	notify: function(inMsg, inArgs){
+		if(!this.isUpdating()){
+			var a = inArgs || [];
+			for(var i=0, m, o; (o=this.observers[i]); i++){
+				m = o.p + inMsg; o = o.o;
+				(m in o)&&(o[m].apply(o, a));
+			}
+		}
+	},
+	// updates
+	clear: function(){
+		this.fields.clear();
+		this.clearData();
+	},
+	beginUpdate: function(){
+		this.updating++;
+	},
+	endUpdate: function(){
+		if(this.updating){
+			this.updating--;
+		}
+		/*if(this.updating){
+			if(!(--this.updating)){
+				this.change();
+			}
+		}
+		}*/
+	},
+	isUpdating: function(){
+		return Boolean(this.updating);
+	},
+	// data
+	clearData: function(){
+		this.setData(null);
+	},
+	// observer events
+	change: function(){
+		this.notify("Change", arguments);
+	},
+	insertion: function(/* index */){
+		this.notify("Insertion", arguments);
+		this.notify("Change", arguments);
+	},
+	removal: function(/* keys */){
+		this.notify("Removal", arguments);
+		this.notify("Change", arguments);
+	},
+	// insert
+	insert: function(inData /*, index */){
+		if(!this._insert.apply(this, arguments)){
+			return false;
+		}
+		this.insertion.apply(this, dojo._toArray(arguments, 1));
+		return true;
+	},
+	// remove
+	remove: function(inData /*, index */){
+		if(!this._remove.apply(this, arguments)){
+			return false;
+		}
+		this.removal.apply(this, arguments);
+		return true;
+	},
+	// sort
+	canSort: function(/* (+|-)column_index+1, ... */){
+		return this.sort != null;
+	},
+	generateComparator: function(inCompare, inField, inTrueForAscend, inSubCompare){
+		return function(a, b){
+			var ineq = inCompare(a[inField], b[inField]);
+			return ineq ? (inTrueForAscend ? ineq : -ineq) : inSubCompare && inSubCompare(a, b);
+		}
+	},
+	makeComparator: function(inIndices){
+		var idx, col, field, result = null;
+		for(var i=inIndices.length-1; i>=0; i--){
+			idx = inIndices[i];
+			col = Math.abs(idx) - 1;
+			if(col >= 0){
+				field = this.fields.get(col);
+				result = this.generateComparator(field.compare, field.key, idx > 0, result);
+			}
+		}
+		return result;
+	},
+	sort: null,
+	dummy: 0
+});
+
+dojo.declare("dojox.grid.data.Rows", dojox.grid.data.Model, {
+	// observer events
+	allChange: function(){
+		this.notify("AllChange", arguments);
+		this.notify("Change", arguments);
+	},
+	rowChange: function(){
+		this.notify("RowChange", arguments);
+	},
+	datumChange: function(){
+		this.notify("DatumChange", arguments);
+	},
+	// copyRow: function(inRowIndex); // abstract
+	// update
+	beginModifyRow: function(inRowIndex){
+		if(!this.cache[inRowIndex]){
+			this.cache[inRowIndex] = this.copyRow(inRowIndex);
+		}
+	},
+	endModifyRow: function(inRowIndex){
+		var cache = this.cache[inRowIndex];
+		if(cache){
+			var data = this.getRow(inRowIndex);
+			if(!dojox.grid.arrayCompare(cache, data)){
+				this.update(cache, data, inRowIndex);
+			}
+			delete this.cache[inRowIndex];
+		}
+	},
+	cancelModifyRow: function(inRowIndex){
+		var cache = this.cache[inRowIndex];
+		if(cache){
+			this.setRow(cache, inRowIndex);
+			delete this.cache[inRowIndex];
+		}
+	}
+});
+
+dojo.declare("dojox.grid.data.Table", dojox.grid.data.Rows, {
+	// summary:
+	//	Basic grid data model for static data in the form of an array of rows
+	//	that are arrays of cell data
+	constructor: function(){
+		this.cache = [];
+	},
+	colCount: 0, // tables introduce cols
+	data: null,
+	cache: null,
+	// morphology
+	measure: function(){
+		this.count = this.getRowCount();
+		this.colCount = this.getColCount();
+		this.allChange();
+		//this.notify("Measure");
+	},
+	getRowCount: function(){
+		return (this.data ? this.data.length : 0);
+	},
+	getColCount: function(){
+		return (this.data && this.data.length ? this.data[0].length : this.fields.count());
+	},
+	badIndex: function(inCaller, inDescriptor){
+		console.debug('dojox.grid.data.Table: badIndex');
+	},
+	isGoodIndex: function(inRowIndex, inColIndex){
+		return (inRowIndex >= 0 && inRowIndex < this.count && (arguments.length < 2 || (inColIndex >= 0 && inColIndex < this.colCount)));
+	},
+	// access
+	getRow: function(inRowIndex){
+		return this.data[inRowIndex];
+	},
+	copyRow: function(inRowIndex){
+		return this.getRow(inRowIndex).slice(0);
+	},
+	getDatum: function(inRowIndex, inColIndex){
+		return this.data[inRowIndex][inColIndex];
+	},
+	get: function(){
+		throw('Plain "get" no longer supported. Use "getRow" or "getDatum".');
+	},
+	setData: function(inData){
+		this.data = (inData || []);
+		this.allChange();
+	},
+	setRow: function(inData, inRowIndex){
+		this.data[inRowIndex] = inData;
+		this.rowChange(inData, inRowIndex);
+		this.change();
+	},
+	setDatum: function(inDatum, inRowIndex, inColIndex){
+		this.data[inRowIndex][inColIndex] = inDatum;
+		this.datumChange(inDatum, inRowIndex, inColIndex);
+	},
+	set: function(){
+		throw('Plain "set" no longer supported. Use "setData", "setRow", or "setDatum".');
+	},
+	setRows: function(inData, inRowIndex){
+		for(var i=0, l=inData.length, r=inRowIndex; i<l; i++, r++){
+			this.setRow(inData[i], r);
+		}
+	},
+	// update
+	update: function(inOldData, inNewData, inRowIndex){
+		//delete this.cache[inRowIndex];	
+		//this.setRow(inNewData, inRowIndex);
+		return true;
+	},
+	// insert
+	_insert: function(inData, inRowIndex){
+		dojox.grid.arrayInsert(this.data, inRowIndex, inData);
+		this.count++;
+		return true;
+	},
+	// remove
+	_remove: function(inKeys){
+		for(var i=inKeys.length-1; i>=0; i--){
+			dojox.grid.arrayRemove(this.data, inKeys[i]);
+		}
+		this.count -= inKeys.length;
+		return true;
+	},
+	// sort
+	sort: function(/* (+|-)column_index+1, ... */){
+		this.data.sort(this.makeComparator(arguments));
+	},
+	swap: function(inIndexA, inIndexB){
+		dojox.grid.arraySwap(this.data, inIndexA, inIndexB);
+		this.rowChange(this.getRow(inIndexA), inIndexA);
+		this.rowChange(this.getRow(inIndexB), inIndexB);
+		this.change();
+	},
+	dummy: 0
+});
+
+dojo.declare("dojox.grid.data.Objects", dojox.grid.data.Table, {
+	constructor: function(inFields, inData, inKey){
+		if(!inFields){
+			this.autoAssignFields();
+		}
+	},
+	allChange: function(){
+		this.notify("FieldsChange");
+		this.inherited(arguments);
+	},
+	autoAssignFields: function(){
+		var d = this.data[0], i = 0, field;
+		for(var f in d){
+			field = this.fields.get(i++);
+			if (!dojo.isString(field.key)){
+				field.key = f;
+			}
+		}
+	},
+	setData: function(inData){
+		this.data = (inData || []);
+		this.autoAssignFields();
+		this.allChange();
+	},
+	getDatum: function(inRowIndex, inColIndex){
+		return this.data[inRowIndex][this.fields.get(inColIndex).key];
+	}
+});
+
+dojo.declare("dojox.grid.data.Dynamic", dojox.grid.data.Table, {
+	// summary:
+	//	Grid data model for dynamic data such as data retrieved from a server.
+	//	Retrieves data automatically when requested and provides notification when data is received
+	constructor: function(){
+		this.page = [];
+		this.pages = [];
+	},
+	page: null,
+	pages: null,
+	rowsPerPage: 100,
+	requests: 0,
+	bop: -1,
+	eop: -1,
+	// data
+	clearData: function(){
+		this.pages = [];
+		this.bop = this.eop = -1;
+		this.setData([]);
+	},
+	getRowCount: function(){
+		return this.count;
+	},
+	getColCount: function(){
+		return this.fields.count();
+	},
+	setRowCount: function(inCount){
+		this.count = inCount;
+		this.change();
+	},
+	// paging
+	requestsPending: function(inBoolean){
+	},
+	rowToPage: function(inRowIndex){
+		return (this.rowsPerPage ? Math.floor(inRowIndex / this.rowsPerPage) : inRowIndex);
+	},
+	pageToRow: function(inPageIndex){
+		return (this.rowsPerPage ? this.rowsPerPage * inPageIndex : inPageIndex);
+	},
+	requestRows: function(inRowIndex, inCount){
+		// summary:
+		//		stub. Fill in to perform actual data row fetching logic. The
+		//		returning logic must provide the data back to the system via
+		//		setRow
+	},
+	rowsProvided: function(inRowIndex, inCount){
+		this.requests--;
+		if(this.requests == 0){
+			this.requestsPending(false);
+		}
+	},
+	requestPage: function(inPageIndex){
+		var row = this.pageToRow(inPageIndex);
+		var count = Math.min(this.rowsPerPage, this.count - row);
+		if(count > 0){
+			this.requests++;
+			this.requestsPending(true);
+			setTimeout(dojo.hitch(this, "requestRows", row, count), 1);
+			//this.requestRows(row, count);
+		}
+	},
+	needPage: function(inPageIndex){
+		if(!this.pages[inPageIndex]){
+			this.pages[inPageIndex] = true;
+			this.requestPage(inPageIndex);
+		}
+	},
+	preparePage: function(inRowIndex, inColIndex){
+		if(inRowIndex < this.bop || inRowIndex >= this.eop){
+			var pageIndex = this.rowToPage(inRowIndex);
+			this.needPage(pageIndex);
+			this.bop = pageIndex * this.rowsPerPage;
+			this.eop = this.bop + (this.rowsPerPage || this.count);
+		}
+	},
+	isRowLoaded: function(inRowIndex){
+		return Boolean(this.data[inRowIndex]);
+	},
+	// removal
+	removePages: function(inRowIndexes){
+		for(var i=0, r; ((r=inRowIndexes[i]) != undefined); i++){
+			this.pages[this.rowToPage(r)] = false;
+		}
+		this.bop = this.eop =-1;
+	},
+	remove: function(inRowIndexes){
+		this.removePages(inRowIndexes);
+		dojox.grid.data.Table.prototype.remove.apply(this, arguments);
+	},
+	// access
+	getRow: function(inRowIndex){
+		var row = this.data[inRowIndex];
+		if(!row){
+			this.preparePage(inRowIndex);
+		}
+		return row;
+	},
+	getDatum: function(inRowIndex, inColIndex){
+		var row = this.getRow(inRowIndex);
+		return (row ? row[inColIndex] : this.fields.get(inColIndex).na);
+	},
+	setDatum: function(inDatum, inRowIndex, inColIndex){
+		var row = this.getRow(inRowIndex);
+		if(row){
+			row[inColIndex] = inDatum;
+			this.datumChange(inDatum, inRowIndex, inColIndex);
+		}else{
+			console.debug('[' + this.declaredClass + '] dojox.grid.data.dynamic.set: cannot set data on an non-loaded row');
+		}
+	},
+	// sort
+	canSort: function(){
+		return false;
+	}
+});
+
+// FIXME: deprecated: (included for backward compatibility only)
+dojox.grid.data.table = dojox.grid.data.Table;
+dojox.grid.data.dynamic = dojox.grid.data.Dynamic;
+
+// we treat dojo.data stores as dynamic stores because no matter how they got
+// here, they should always fill that contract
+dojo.declare("dojox.grid.data.DojoData", dojox.grid.data.Dynamic, {
+	//	summary:
+	//		A grid data model for dynamic data retreived from a store which
+	//		implements the dojo.data API set. Retrieves data automatically when
+	//		requested and provides notification when data is received
+	//	description:
+	//		This store subclasses the Dynamic grid data object in order to
+	//		provide paginated data access support, notification and view
+	//		updates for stores which support those features, and simple
+	//		field/column mapping for all dojo.data stores.
+	constructor: function(inFields, inData, args){
+		this.count = 1;
+		this._rowIdentities = {};
+		this._currentlyProcessing = [];
+		if(args){
+			dojo.mixin(this, args);
+		}
+		if(this.store){
+			var f = this.store.getFeatures();
+			this._canNotify = f['dojo.data.api.Notification'];
+			this._canWrite = f['dojo.data.api.Write'];
+			this._canIdentify = f['dojo.data.api.Identity'];
+			if(this._canNotify){
+				dojo.connect(this.store, "onSet", this, "_storeDatumChange");
+				dojo.connect(this.store, "onDelete", this, "_storeDatumDelete");
+				dojo.connect(this.store, "onNew", this, "_storeDatumNew");
+			}
+			if(this._canWrite) {
+				dojo.connect(this.store, "revert", this, "refresh");
+			}
+		}
+	},
+	markupFactory: function(args, node){
+		return new dojox.grid.data.DojoData(null, null, args);
+	},
+	query: { name: "*" }, // default, stupid query
+	store: null,
+	_currentlyProcessing: null,
+	_canNotify: false,
+	_canWrite: false,
+	_canIdentify: false,
+	_rowIdentities: {},
+	clientSort: false,
+	sortFields: null,
+	queryOptions: null,
+
+	// data
+	setData: function(inData){
+		this.store = inData;
+		this.data = [];
+		this.allChange();
+	},
+	setRowCount: function(inCount){
+		//console.debug("inCount:", inCount);
+		this.count = inCount;
+		this.allChange();
+	},
+	beginReturn: function(inCount){
+		if(this.count != inCount){
+			// this.setRowCount(0);
+			// this.clear();
+			// console.debug(this.count, inCount);
+			this.setRowCount(inCount);
+		}
+	},
+	_setupFields: function(dataItem){
+		// abort if we already have setup fields
+		if(this.fields._nameMaps){
+			return;
+		}
+		// set up field/index mappings
+		var m = {};
+		//console.debug("setting up fields", m);
+		var fields = dojo.map(this.store.getAttributes(dataItem),
+			function(item, idx){ 
+				m[item] = idx;
+				m[idx+".idx"] = item;
+				// name == display name, key = property name
+				return { name: item, key: item };
+			},
+			this
+		);
+		this.fields._nameMaps = m;
+		// console.debug("new fields:", fields);
+		this.fields.set(fields);
+		this.notify("FieldsChange");
+	},
+	_getRowFromItem: function(item){
+		// gets us the row object (and row index) of an item
+	},
+	_createRow: function(item){
+		var row = {}; 
+		row.__dojo_data_item = item;
+		dojo.forEach(this.fields.values, function(a){
+			value = this.store.getValue(item, a.name);
+			row[a.name] = (value === undefined || value === null)?"":value;
+		}, this);
+		return row;
+	},
+	processRows: function(items, request){
+		// console.debug(arguments);
+		if(!items || items.length == 0){ return; }
+		this._setupFields(items[0]);
+		dojo.forEach(items, function(item, idx){
+			var row = this._createRow(item);
+			this._setRowId(item, request.start, idx);
+			this.setRow(row, request.start+idx);
+		}, this);
+		// FIXME: 
+		//	Q: scott, steve, how the hell do we actually get this to update
+		//		the visible UI for these rows?
+		//	A: the goal is that Grid automatically updates to reflect changes
+		//		in model. In this case, setRow -> rowChanged -> (observed by) Grid -> modelRowChange -> updateRow
+	},
+	// request data 
+	requestRows: function(inRowIndex, inCount){
+		var row  = inRowIndex || 0;
+		var params = { 
+			start: row,
+			count: this.rowsPerPage,
+			query: this.query,
+			sort: this.sortFields,
+			queryOptions: this.queryOptions,
+			onBegin: dojo.hitch(this, "beginReturn"),
+			onComplete: dojo.hitch(this, "processRows"), // add to deferred?
+			onError: dojo.hitch(this, "processError")
+		};
+		this.store.fetch(params);
+	},
+	getDatum: function(inRowIndex, inColIndex){
+		//console.debug("getDatum", inRowIndex, inColIndex);
+		var row = this.getRow(inRowIndex);
+		var field = this.fields.values[inColIndex];
+		return row && field ? row[field.name] : field ? field.na : '?';
+		//var idx = row && this.fields._nameMaps[inColIndex+".idx"];
+		//return (row ? row[idx] : this.fields.get(inColIndex).na);
+	},
+	setDatum: function(inDatum, inRowIndex, inColIndex){
+		var n = this.fields._nameMaps[inColIndex+".idx"];
+		// console.debug("setDatum:", "n:"+n, inDatum, inRowIndex, inColIndex);
+		if(n){
+			this.data[inRowIndex][n] = inDatum;
+			this.datumChange(inDatum, inRowIndex, inColIndex);
+		}
+	},
+	// modification, update and store eventing
+	copyRow: function(inRowIndex){
+		var row = {};
+		var backstop = {};
+		var src = this.getRow(inRowIndex);
+		for(var x in src){
+			if(src[x] != backstop[x]){
+				row[x] = src[x];
+			}
+		}
+		return row;
+	},
+	_attrCompare: function(cache, data){
+		dojo.forEach(this.fields.values, function(a){
+			if(cache[a.name] != data[a.name]){ return false; }
+		}, this);
+		return true;
+	},
+	endModifyRow: function(inRowIndex){
+		var cache = this.cache[inRowIndex];
+		if(cache){
+			var data = this.getRow(inRowIndex);
+			if(!this._attrCompare(cache, data)){
+				this.update(cache, data, inRowIndex);
+			}
+			delete this.cache[inRowIndex];
+		}
+	},
+	cancelModifyRow: function(inRowIndex){
+		// console.debug("cancelModifyRow", arguments);
+		var cache = this.cache[inRowIndex];
+		if(cache){
+			this.setRow(cache, inRowIndex);
+			delete this.cache[inRowIndex];
+		}
+	},
+	_setRowId: function(item, offset, idx){
+		// FIXME: where else do we need to keep this in sync?
+		//Handle stores that implement identity and try to handle those that do not.
+		if (this._canIdentify) {
+			this._rowIdentities[this.store.getIdentity(item)] = {rowId: offset+idx, item: item};
+		}else{
+			var identity = dojo.toJson(this.query) + ":start:" + offset + ":idx:" + idx + ":sort:" + dojo.toJson(this.sortFields);
+			this._rowIdentities[identity] = {rowId: offset+idx, item: item};
+		}
+	},
+	_getRowId: function(item, isNotItem){
+		//	summary:
+		//		Function determine the row index for a particular item
+		//	item:
+		//		The store item to examine to determine row index.
+		//	isNotItem:
+		//		Boolean flag to indicate if the item passed is a store item or not.
+		var rowId = null;
+		//Handle identity and nonidentity capable stores.
+		if(this._canIdentify && !isNotItem){
+			rowId = this._rowIdentities[this.store.getIdentity(item)].rowId;
+		}else{
+			//Not efficient, but without identity support, 
+			//not a better way to do it.  Basically, do our best to locate it
+			//This may or may not work, but best we can do here.
+			var id;
+			for(id in this._rowIdentities){
+				if(this._rowIdentities[id].item === item){
+					rowId = this._rowIdentities[id].rowId;
+					break;
+				}
+			}
+		}
+		return rowId;
+	},
+	_storeDatumChange: function(item, attr, oldVal, newVal){
+		// the store has changed some data under us, need to update the display
+		var rowId = this._getRowId(item);
+		var row = this.getRow(rowId);
+		if(row){
+			row[attr] = newVal;
+			var colId = this.fields._nameMaps[attr];
+			this.notify("DatumChange", [ newVal, rowId, colId ]);
+		}
+	},
+	_storeDatumDelete: function(item){
+		if(dojo.indexOf(this._currentlyProcessing, item) != -1)
+			return;
+		// the store has deleted some item under us, need to remove that item from
+		// the view if possible.  It may be the deleted item isn't even in the grid.
+		var rowId = this._getRowId(item, true);
+		if(rowId != null){
+			this._removeItems([rowId]);
+		}
+	},
+	_storeDatumNew: function(item){
+		if(this._disableNew){
+			return;
+		}
+		// the store has added some item under us, need to add it to the view.
+		this._insertItem(item, this.data.length);
+	},
+	insert: function(item, index){
+		// Push the given item back to the store
+		this._disableNew = true;
+		var i = this.store.newItem(item);
+		this._disableNew = false;
+		this._insertItem(i, index);
+	},
+	_insertItem: function(storeItem, index){
+		// Set up our fields if we haven't already 
+		if(!this.fields._nameMaps){
+			this._setupFields(storeItem);
+		}
+		var row = this._createRow(storeItem);
+		for(var i in this._rowIdentities){ //increment all the remaining row ids up one
+			var rowIdentity = this._rowIdentities[i];
+			if(rowIdentity.rowId >= index){
+				rowIdentity.rowId++;
+			}
+		}
+		this._setRowId(storeItem, 0, index);
+		dojox.grid.data.Dynamic.prototype.insert.apply(this, [row, index]);
+	},
+	datumChange: function(value, rowIdx, colIdx){
+		if(this._canWrite){
+			// we're chaning some data, which means we need to write back
+			var row = this.getRow(rowIdx);
+			var field = this.fields._nameMaps[colIdx+".idx"];
+			this.store.setValue(row.__dojo_data_item, field, value);
+			// we don't need to call DatumChange, an eventing store will tell
+			// us about the row change events
+		}else{
+			// we can't write back, so just go ahead and change our local copy
+			// of the data
+			this.notify("DatumChange", arguments);
+		}
+	},
+	insertion: function(/* index */){
+		console.debug("Insertion", arguments);
+		this.notify("Insertion", arguments);
+		this.notify("Change", arguments);
+	},
+	removal: function(/* keys */){
+		console.debug("Removal", arguments);
+		this.notify("Removal", arguments);
+		this.notify("Change", arguments);
+	},
+	remove: function(inRowIndexes){
+		//	summary:
+		//		Function to remove a set of items from the store based on the row index.
+		//	inRowIndexes:
+		//		An array of row indexes from the grid to remove from the store.
+		/* Call delete on the store */ 
+		for(var i=inRowIndexes.length-1; i>=0; i--){
+			// Need to find the item, then remove each from the data store
+			var item = this.data[inRowIndexes[i]].__dojo_data_item;
+			this._currentlyProcessing.push(item);
+			this.store.deleteItem(item);
+		}
+		/* Remove from internal data structure and the view */
+		this._removeItems(inRowIndexes);
+		this._currentlyProcessing = [];
+	},
+	_removeItems: function(inRowIndexes /*array*/){
+		//	summary:
+		//		Function to remove a set of items from the store based on the row index.
+		//	inRowIndexes:
+		//		An array of row indexes from the grid to remove from the store.
+		dojox.grid.data.Dynamic.prototype.remove.apply(this, arguments);
+		// Rebuild _rowIdentities
+		this._rowIdentities = {};
+		for (var i = 0; i < this.data.length; i++){
+			this._setRowId(this.data[i].__dojo_data_item, 0, i);
+		}
+	},
+	canSort: function(){
+		// Q: Return true and re-issue the queries?
+		// A: Return true only. Re-issue the query in 'sort'.
+		// Note, above are original comments :)
+		return true;
+	},
+	sort: function(colIndex){
+		var col = Math.abs(colIndex) - 1;
+		this.sortFields = [{'attribute': this.fields.values[col].name, 'descending': (colIndex>0)}];
+		
+		// Since we're relying on the data store to sort, we have to refresh our data.
+		this.refresh();
+	},
+	refresh: function(){
+		//	summary:
+		//		Function to cause the model to re-query the store and rebuild the current viewport.
+		this.clearData(true);
+		this.requestRows();
+	},
+	clearData: function(/* boolean */ keepStore){
+		this._rowIdentities = {};
+		this.pages = [];
+		this.bop = this.eop = -1;
+		this.count = 0;
+		this.setData((keepStore?this.store:[]));
+	},
+	processError: function(error, request){
+		//	summary:
+		//		Hook function to trap error messages from the store and emit them.  
+		//		Intended for connecting to and handling the error object or at least reporting it.
+		//
+		//	error:
+		//		The error object returned by the store when a problem occurred.
+		//	request:
+		//		The request object that caused the error.
+		console.log(error);
+	}
+});
+
+}