Hi James,
Welcome back... Still remember you from old times in list :-)
On Tue, Mar 27, 2018 at 2:42 PM, James Carman <ja...@carmanconsulting.com>
wrote:
> It has been a while since I've used Wicket and man, I really forgot how
> much I love this framework! It may be that I'm rusty, but I've searched
> quite a bit and tried all the suggestions I've found, but I can't seem to
> make add/remove via AJAX work for a ListView while preserving the input
> data. I am using Wicket 8.0.0-M9. Here's what I've done so far:
>
> correctChoiceGroup = new CheckGroup<>("correctChoices",
> Model.ofSet(Sets.newHashSet()));
> correctChoiceGroup.setRequired(true);
> correctChoiceGroup.setOutputMarkupId(true);
> correctChoiceGroup.setRenderBodyOnly(false);
>
> final IModel<List<String>> choicesModel = Model.ofList(new LinkedList<>());
> choicesView = new ListView<String>("choices", choicesModel) {
> @Override
> protected void populateItem(ListItem<String> item) {
> final int index = item.getIndex();
>
> item.add(new TextField<>("field", item.getModel()));
> item.add(new Check<>("check", Model.of(index)));
>
> final AjaxSubmitLink deleteLink = new
> AjaxSubmitLink("deleteButton") {
> @Override
> @SuppressWarnings("unchecked")
> protected void onSubmit(AjaxRequestTarget target) {
> final ListView listView = findParent(ListView.class);
> listView.getModelObject().remove(index);
> listView.removeAll();
> target.add(correctChoiceGroup);
> }
> };
> deleteLink.setDefaultFormProcessing(false);
> item.add(deleteLink);
> }
> }.setReuseItems(true);
>
>
> correctChoiceGroup.add(choicesView);
>
> add(new AjaxSubmitLink("addButton") {
> @Override
> protected void onSubmit(AjaxRequestTarget target) {
> choicesView.getModelObject().add("");
> choicesView.removeAll();
> target.add(correctChoiceGroup);
> }
> }.setDefaultFormProcessing(false));
>
> add(correctChoiceGroup);
>
>
> When I click on the delete link (I have a similarly-implemented "add" link
> outside of the ListView), all of the input data goes away, since I am
> losing the original items from the removeAll() call. Now, I am doing the
> removeAll() to force Wicket to realize that I've changed the underlying
> list, otherwise, the original items are reused and the it always looks like
> the last item is removed. I'm sure I'm just rusty, but I am banging my
> head on this one.
>
> Thanks,
>
> James
>
--
Regards - Ernesto Reinaldo Barreiro
