your link works on the object and not on the model, instead
add(new link("delete", item.getmodel()) { onclick() {
delete(getmodelobject()); }});
-igor
On Thu, Oct 2, 2008 at 9:04 AM, Jürgen Lind <[EMAIL PROTECTED]> wrote:
> Hi there,
>
> I have been struggling for some time now to understand how
> LoadableDetachableModel and a ListView work together. The starting point
> was Chapter 5.5.2 of "Wicket in Action" where it is recommended to provide
> your own ItemModel if the underlying list changes frequently. To try out
> how Wicket behaves without such a custom ItemModel, I wrote the following
> Test:
>
> <body>
> <em wicket:id="listview">
> <span wicket:id="label"></span><a wicket:id="delete">delete</a>
> </em>
> </body>
>
>
> LoadableDetachableModel model = new LoadableDetachableModel() {
>
> @Override
> protected Object load() {
> System.out.println("load");
> return Arrays.asList(new TestItem[] {
> new TestItem("a" + Math.random()),
> new TestItem("b" + Math.random()),
> new TestItem("c" + Math.random()) });
> }
>
> protected void onDetach() {
> System.out.println("detach");
> }
>
> };
>
> ListView listview = new ListView("listview", model) {
> protected void populateItem(ListItem item) {
> final TestItem itemModel = (TestItem) item.getModelObject();
> item.add(new Label("label", itemModel.toString()));
> item.add(new Link("delete") {
>
> @Override
> public void onClick() {
> System.out.println("Delete " + itemModel);
> }
> });
> }
> };
>
> add(listview);
>
>
> Now, I would expect that when I hit the "delete" link, Wicket would call the
> "load" Method of the LoadableDetachableModel before printing "Delete..." as
> the
> default implementation will use the index and the list to determine the item
> to
> delete. To my surprise, however, the "Delete..." message is printed with the
> correct item and the "load" Method is called afterwards. In my
> understanding,
> this contradicts the idea of the LoadableDetachableModel since Wicket seems
> to
> have a copy of the original list somewhere so that it can determine the list
> item on which the action was invoked before loading the underlying list.
>
> Can someone spot my mistake?
>
> Thanks,
>
> J.
>
> --
> Dr. Jürgen Lind
> iteratec GmbH Fon: +49 (0)89 614551-44
> Inselkammerstrasse 4 Fax: +49 (0)89 614551-10
> 82008 Unterhaching Web: www.iteratec.de
>
> Sitz und Registergericht der iteratec GmbH: München HRB 113 519
> Geschäftsführer: Klaus Eberhardt, Mark Goerke, Inge Hanschke, Ralf Menzel
>
>
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