Hi Sven, thanx for feedback. Ok, how to implement the LocationColumn more reusable? I dont want to be bound to a Datatable of Persons.
I'd like to have a Column which works with a Locations, independently from which model-object the expression fetches the Location.
Is there any way to do that? best regards Patrick Am 05.03.2015 um 15:19 schrieb Sven Meier:
Hi, generic T is identical for the DataTable, and it's IColumns: it's the type of the row models. A column is responsible to provide a cell component for a row: For DataTable only the input (e.g. Person) is interesting, the output (Location) doesn't matter. Your LocationColumn should extend PropertyColumn<Person>: public class LocationColumn extends PropertyColumn<Person>{ public LocationColumn(String expressionToLocation){ super(Model.of("Location"), expressionToLocation); } @Override public void populateItem(Item<ICellPopulator<Person>> cellItem, String componentId, IModel<Person> rowModel) { cellItem.add(new Label(componentId, new LocationFormatModel((IModel<Location>)createDataModel(rowModel), Model.of(Session.get().getLocale())))); } } Have fun Sven Am 05.03.2015 um 12:26 schrieb Patrick Davids:Hi all, whats the meaning of generic T on DataTables vs T of IColumn and T of ICellPopulator? As I understand its the type of object shown by the table rows. Reading the javadoc of AbstractColumn it says T (if I understand correct), its the type of object shown by the cell itself. But DataTable and its internal list of columns are bound together. T of both must be the same... I tried to implement something like this, and here I get problems. List<IColumn<Person, Void>> cols = new ArrayList<>(); cols.add(new PropertyColumn<Person, Void>(Model.of("Name"), "name")); (compiler error) cols.add(new LocationColumn("location")); (compiler error) new DataTable<Person, Void>("id", cols, new ListDataProvider<Person>(), 50); public class LocationColumn extends PropertyColumn<Location>{ public LocationColumn(String expressionToLocation){ super(Model.of("Location"), expressionToLocation); } @Override public void populateItem(Item<ICellPopulator<Location>> cellItem, String componentId, IModel<Location> rowModel) { cellItem.add(new Label(componentId, new LocationFormatModel(rowModel, Model.of(Session.get().getLocale())))); } } Also the Generic of ICellPopulator is bound to T of column. I always thought it could be possible to implement sub-class columns to allow special renderings of table-cells. But how can I achieve this, if also ICellPopulator is bound to T of the rowModel? kind regards Patrick --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org--------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
-- Mit freundlichen Grüßen, Patrick Davids nuboLOGIC GmbH & Co. KG Südportal 1 • 22848 Norderstedt Tel.: +49 40 228539 732 Email: patrick.dav...@nubologic.com http://www.nubologic.com Handelsregister: HRA6819 Pi | Amtsgericht Pinneberg Geschäftsführung der Verwaltungsgesellschaft Christian Capelle HRB10145Pi | Amtsgericht Pinneberg --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
