The model of your listView has to be LoadableDetachable so that the listView
retrieves the new list values each time. Also the setReuseItems() might
have to be false. I don't think you're doing form validation within the
ListView correct?
Marcel Bonnet wrote:
>
> Hi everybody, I'm new in the mail-list. I've been studying the framework,
> I
> even read the book Wicket in Action, but I'm having trouble using some
> kind
> of repeater inside a Form, updating and validating the model.
> What I'm trying to do is a ListView inside a Form: when the user change
> the
> value of the dropdownchoice, it needs to fire a validator to verify if the
> new choice is already in the list. If it is, the validator must call the
> "error(validatable)" method from AbstractValidator because I don't want
> repeated choices in the list.
> First question, anybody knows a simple way to do this?
> Second, if I'm on the right way with the code above, how can I get the
> listview's model (with the updated values changed by the user, instead of
> the default items rendered on the view on the first time) so I can pass
> this
> updated model to my Validator (it needs to know the values in the list to
> know wich is repeated).
>
> I just supressed the part of the code that fires my feedback message ( a
> kind of Label because I don't want a message per component, just a global
> message)
> Thanks for any help. Marcel.
>
> private class InputForm extends Form
> {
> // holds NameWrapper elements
> private List<NameWrapper> data;
>
> public InputForm(String name, IFeedback feedback)
> {
> super(name);
>
> final SubmitLink update = new SubmitLink("update");
> add(update);
>
> // add some dummy data
> data = new ArrayList<NameWrapper>();
> data.add(new NameWrapper("one", 1, "default = 1", true));
> data.add(new NameWrapper("two", 2, "default = 2", false));
> data.add(new NameWrapper("three", 3, "default = 3", false));
> data.add(new NameWrapper("four", 4, "default = 4", true));
> final Model dataModel = new Model();
> dataModel.setObject(data);
> ListView listView = new ListView("list", dataModel)
> {
>
> protected void populateItem(ListItem item)
> {
>
> NameWrapper wrapper =
> (NameWrapper)item.getModelObject();
>
> item.add(new Label("name", wrapper.getName()));
> item.add(new CheckBox("check", new
> PropertyModel(wrapper, "selected")));
>
> DropDownChoice combo = new DropDownChoice("combo"
> , new Model(wrapper)
> , new ArrayList(Arrays.asList(new
> NameWrapper(1000,"mil"), new NameWrapper(2000,"dois mil"), new
> NameWrapper(3000,"três mil")))
> , new ChoiceRenderer("comboText","comboId"));
>
> combo.add(new
> NameWrapperValidator((List<NameWrapper>)dataModel.getObject()));
> item.add(combo);
> }
> };
> *listView.setReuseItems(true); *//i read this line
> is very important
> add(listView);
>
>
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