On Mon, 15 Mar 2010 15:06 +0100, "Thierry Peng" <p...@glue.ch> wrote:
> Pointbreak schrieb:
> > The public interface of the inmethod DataGrid/DefaultDataGrid does not
> > seem to provide functionality to expand the number of rows after an
> > ajax-call that e.g. adds data to the underlying datasource. Is there a
> > way to tell the DataGrid that the underlying datasource may have
> > changed, to the effect that the existing row count is not valid anymore?
> > I.e. like markAllItemsDirty(), but then telling the grid to reload the
> > entire underlying model, including rowcount, instead of only the
> > individual rows?
> >
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> >
> >
> I tackled a similar problem (an "add" button for an editable datagrid)
> the following way:
>
> - create a new object with reflection
> - insert it in the backing list (model)
> - call update on the grid
> - add the grid to the requesttarget
>
> public class MyDataGrid extends DecoratedDataGrid
> {
> protected List rawList;
>
> protected final Class modelAsClass;
>
> public MyDataGrid(String id, String title, String buttonTitle, List<?>
> list,
> List<IGridColumn> columns, final Class<?> modelAsClass)
> {
> super(id, title, buttonTitle, new MyDataProviderAdapter(new
> ListDataProvider(list)),
> columns, modelAsClass);
> log.debug("creating grid for type " + modelAsClass.getSimpleName()
> + " no of columns: " + columns.size() + " size of datalist: " +
> list.size());
> this.rawList = list;
> }
>
> @Override
> protected void onAddRow(AjaxRequestTarget target, Form<?> form)
> {
> Object obj = modelAsClass.newInstance();
>
> rawList.add(obj);
> log.debug("object of class " + modelAsClass.getName() + "
> successfully inserted");
> update();
> target.addComponent(getGrid());
> }
> }
>
> This takes place in a custom subclass of the defaultdatagrid. The
> onAddRow method is called from an ajaxbutton (onsubmit)
> I hope this helps
>
> --
> Thierry Peng
You must be doing something else in addition to that (or I am missing
something). As far as I can see, the DefaultDataGrid class will not ask
its model/datasource for a new rowcount when you call update(). Hence
the call to update() will not result in the addition of a row to the
grid, even though you added the row to your model. Are you sure you are
not replacing the entire dataGrid in e.g. your getGrid() call?
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