Periodical updates of Listgrid. Criteria Problems (startRow, endRow)

[gravityshock]

Hi,
i am using Smartclient 6.51 and use following code to refresh listgrids for displaying realtime data. The data does not disappear while fetching data in background. This works fine but I got some problems with the criteria.

Listgrid:

isc.ListGrid.create( {
	ID :"remarks_list_list1_0001",
	componentTimestamp :"1231419451",
	width :"100%",
	height :"*",
	minWidth :300,
	membersMargin :10,
	autoDraw :false,
	autoFetchData :false,
	alternateRecordStyles :true,
	showAllRecords :false,
	canGroupBy :false,
	canSort :true,
	showHeaderContextMenu :false,
	wrapCells :true,
	fixedRecordHeights :false,
	loadingDataMessage :"Lade Daten...",
	dataSource :"remarks_list_remarksds1_0001",
	TI :null,
	rowNum :-1,
	timerInterval :60000,
	timerEvent :null,
	UI :"1_0001",
	show : function() {
		if (!remarksInfobox1_0001.isObserving(this, 'dataChanged')) {
			remarksInfobox1_0001.observe(this, 'dataChanged','observer.updateInfo(this)');
			this.startTimer(true);
		} else {
			if (null != this.timerEvent) {
				isc.Timer.clear(this.timerEvent);
			}
			this.startTimer(false)
		}
		return this.Super('show', arguments);
	},
	startTimer : function(initial, force) {
		var criteria = {};
		if (remarks_list_list1_0001.data) {
			if (remarks_list_list1_0001.data.criteria) {
				criteria = remarks_list_list1_0001.data.criteria;
			}
		}
		isc.addProperties(criteria, {
			transId :isc.timeStamp(),
			refresh :0,
			metadata :sysReg.getRegistry('production').getRegistry(this.UI).getContext()
		});
		var interval = parseInt(this.timerInterval);
		if (interval == 0) {
		} else if (interval < 1000) {
			interval = 5000;
		}

		if (initial == true) {
			this.fetchData(criteria, function() {});
			if (null != this.timerEvent) {
				isc.Log.logInfo('TIMER CLEARED');
				isc.Timer.clear(this.timerEvent);
			}
		} else {
			if (!sysReg.getRegistry('client').getRecVal('modalState')) {
				if ((remarks_list_list1_0001.isVisible() && remarks_list_list1_0001.isDrawn()) || (force == true)) {
					this.selectedRowNum = this.data.indexOf(this.getSelectedRecord());
					remarksInfobox1_0001.refreshing();
					criteria.refresh = 1;
					var compDs = this.dataSource;

					if (null != this.timerEvent) {
						isc.Log.logInfo('TIMER CLEARED');
						isc.Timer.clear(this.timerEvent);
					}
					isc.DataSource.get(this.dataSource).fetchData(
						criteria,
						function(dsResponse, data, dsRequest, compDs) {
							var res = remarks_list_list1_0001.data;
							if (!res) {
								var res = isc.ResultSet.create( {
											dataSource :compDs,
											allRows :data
										});
								remarks_list_list1_0001.setData(res);
							}
							res.allRows = data;
							res.localData = data;
							res.totalRows = dsResponse.totalRows;
							res.dataChanged();
							var rowNum = remarks_list_list1_0001.selectedRowNum;
							if (rowNum >= 0) {
								remarks_list_list1_0001.selectRecord(rowNum);
							}
							remarksInfobox1_0001.refreshSucess();
							isc.Log.logInfo('TIMER RESTARTED');
							var interval = parseInt(this.timerInterval);
							if (interval > 0) {
								this.timerEvent = Timer.setTimeout("remarks_list_list1_0001.startTimer(false)",interval);
							}
						}, 
						{showPrompt :false,useSimpleHttp :true});
				}
			}
		}
		if (interval > 0) {
			this.timerEvent = Timer.setTimeout("remarks_list_list1_0001.startTimer(false)",interval);
		}
	}
});

DataSource:

isc.DataSource.create( {
	ID :"remarks_list_remarksds1_0001",
	componentTimestamp :"1231419450",
	dataFormat :"xml",
	recordXPath :"/response/data/dataset/row",
	dataTimestamp :null,
	UI :"1_0001",
	metadata : {
		user :"oliver",
		S :1,
		D :520,
		UI :"1_0001",
		TI :"1_0001"
	},
	fields : [ {
		name :'id',
		type :'integer',
		title :'Id',
		primaryKey :true
	}, {
		name :'date',
		title :'Datum'
	}, {
		name :'remark',
		type :'text',
		title :'Bemerkung'
	} ],
	transformRequest : function(dsRequest) {
		this.Super('transformRequest', dsRequest);
		dsRequest.timeout = 240000;
		dsRequest.useSimpleHttp = true;
		var params = {
			metadata :sysReg.getRegistry('production').getRegistry('1_0001').getContext(),
			startRow :dsRequest.startRow,
			endRow :dsRequest.endRow,
			sortBy :dsRequest.sortBy
		};
		return isc.addProperties( {}, dsRequest.data, params)
	},
	transformResponse : function(dsResponse, dsRequest, data) {
		this.transformResponseCheck(dsResponse, dsRequest, data);
		this.transformResponseValidation(dsResponse, dsRequest, data,'1_0001');
		return dsResponse;
	}
});

The Proble is that on initial fetch the criteria is set correct like this:
http://myurl/remarks/list/fetch?transId=1231422389789&refresh=0&startRow=0&endRow=75&sortBy=null

When the next time a refresh is triggered the parameter like startow, endRow and sortBy are undefined. But I need them to tell the server what SQL to perform.
http://myurl/remarks/list/fetch?transId=1231422509867&refresh=1&startRow=null&endRow=null&sortBy=null

I hope you could help me with this problem. I think it might have someting to do with the dsRequest in the transformRequest function.

Thanks in advance!!!

[Isomorphic]

A direct call to DataSource.fetchData() knows nothing about the ListGrid or it's current sort direction. You need to pass any such properties via the requestProperties (third argument to DataSource.fetchData()).