forgot to explain that the whole thing works with the
qcl.databinding.simple.MDataManager mixin, which does all the i/o stuff
and dispatches the "dataReceived" event when the data has arrived. this
part works flawlessly, the data is just not rendered in the table rows....
bibliograph schrieb:
> Hello,
>
> it took me a while to figure out how to write an implementation of the
> qx.ui.table.model.Remote class. I will provide this class as a
> much-needed example. Now everything works with the backend - the data is
> prefetched and everything - sweet! But .... nothing shows up in my
> table, event though the data is passed to this._onRowDataLoaded() as
> required. My data looks like this:
>
> [ [ "foo","bar","baz"],["Foo!","BAR!","zoo"], ...]
>
> What am I doing wrong?
>
> Thanks, Christian
>
> /**
> * An implementation of the abstract class qx.ui.table.model.Remote that
> uses
> * qcl.databinding.simple package
> */
> qx.Class.define("qcl.databinding.simple.RemoteTableModel",
> {
> extend : qx.ui.table.model.Remote,
>
> construct : function(serviceName)
> {
> this.base(arguments);
> this.setServiceName(serviceName||"");
> this.setDataBinding(true);
>
> // setup event listener for handling data received by MDataManager mixin
> this.addEventListener("dataReceived",function(e){
> result = e.getData();
> if ( result== null )
> {
> this.setRowCount(null);
> this.setRowData([]);
> }
> else if ( "rowCount" in result )
> {
> this.setRowCount(result.rowCount);
> }
> else if ( "rowData" in result )
> {
> this.setRowData(result.rowData);
> }
> });
> },
>
> properties :
> {
>
> /**
> * the data passed to the server methods which determine row count
> and row data
> * it is up to the server method to interpret this data - it can be
> a full sql
> * query string (not recommended) or just bits of data (in an array
> or object)
> * to construct the query.
> */
> queryData :
> {
> nullable : true,
> init : null
> },
>
> /**
> * name of the jsonrpc service method that determines row count
> * defaults to "getRowCount"
> */
> serviceMethodGetRowCount :
> {
> check : "String",
> nullable : false,
> init : "getRowCount"
> },
>
> /**
> * name of the jsonrpc service method that retrieves the row data
> * defaults to "getRowData"
> */
> serviceMethodGetRowData :
> {
> check : "String",
> nullable : false,
> init : "getRowData"
> }
> },
>
> members :
> {
>
> /**
> * overridden
> * in this version of a remote table model, simply an alias for
> this.reloadData()
> */
> updateClient : function()
> {
> this.reloadData();
> },
>
> /**
> * gets number of rows that the query will produce.
> * The value of the queryData property is passed to the
> * service class on the server which needs to return the following
> * response: { result : { rowCount : 1234 }, ... }
> *
> * @type member
> * @abstract
> * @return {void}
> */
> _loadRowCount : function()
> {
> if ( ! this.getServiceName() ) return 0; // do not do any updates
> until service name is known
> this._updateClient(
> this.getServiceName() + "." + this.getServiceMethodGetRowCount(),
> this.getQueryData()
> );
> this._rowCount = 0; // update is in progress
> },
>
> /**
> * receives the row count value returned by the server and passes it on
> * to the _onRowCountLoaded function as required by
> qx.ui.table.model.Remote
> */
> setRowCount : function (rowCount)
> {
> this._onRowCountLoaded(rowCount);
> },
>
> /**
> * gets the column names as an array
> * @return {Array}
> */
> getColumnIds : function ()
> {
> return this._columnIdArr;
> },
>
> /**
> * Loads row data from the server. The service class on the server
> * must have the following signature:
> * Mixed queryData data from which to construct the query
> * Integer firstRow
> * Integer lastRow
> * The server jsonrpc response must look like so:
> * { result : { rowData : [ [ ... ],[...],...] }, ..}
> *
> * @type member
> * @abstract
> * @param firstRow {Integer} The index of the first row to load.
> * @param lastRow {Integer} The index of the last row to load.
> * @return {void}
> */
> _loadRowData : function(firstRow, lastRow)
> {
> if ( ! this.getServiceName() ) return []; // do not do any updates
> until service name is known
> this._updateClient(
> this.getServiceName() + "." + this.getServiceMethodGetRowData(),
> this.getQueryData(),firstRow,lastRow
> );
> },
>
> /**
> * receives the row data returned by the server and passes it on
> * to the _onRowDataLoaded function as required by
> qx.ui.table.model.Remote
> */
> setRowData : function (rowDataArr)
> {
> this._onRowDataLoaded(rowDataArr);
> }
>
> }
> });
>
>
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