CODEWITHSUNDEEP
javascalawicket
Bera
Bera

Reputation: 1282

Wicket: Update Model on DropDownChoice Item Selection Event

I need to update a model or object immediately after select a DropDownChoice item.

Bellow is the code that I'm working:

add(new ListView[Company]("listCompanies", listData) {

    override protected def onBeforeRender() {
      //
      // ...
      super.onBeforeRender()
    }

    def populateItem(item: ListItem[Company]) = {
      var company = item.getModelObject()

      //...

      val listClients: java.util.List[Client] = clientControler.listClients


      item.add(new DropDownChoice("clientSelection", listClients,new ChoiceRenderer[Client]("name")))

In the Listview with properties of Company Object, after choose a name property of the DropDownChoice, the model Company would be updated with the Client Name selected.

How can I achieve this?

Thanks

Upvotes: 0

Views: 8378

Answers (3)

kuzu11
kuzu11

Reputation: 1

I think you can use an AjaxEventBehavior on your DropDownChoice:

item.add(new DropDownChoice("clientSelection", listClients,new ChoiceRenderer[Client("name")).add(new AjaxEventBehavior("change") {
        @Override
        protected void onEvent(AjaxRequestTarget target) {
            // TODO Auto-generated method stub
        }
    }))

Upvotes: 0

hudi
hudi

Reputation: 16555

you need to add updating behavior: 

    add(new DropDownChoice<Client>("clientSelection", listClients)
                .add(new AjaxFormComponentUpdatingBehavior("onchange") {

                    private static final long serialVersionUID = 1L;

                    @Override
                    protected void onUpdate(AjaxRequestTarget target) {

// update your model here
// then you need to add model to target
                        target.add();
                    }
                }));

Upvotes: 7

crea1
crea1

Reputation: 12617

I think you can override onSelectionChanged. But you also need to override wantOnSelectionChangedNotifications to return true to make it work. Something like this.

    DropDownChoice<Client> dropDownChoice = new DropDownChoice("clientSelection", listClients) {
        @Override
        protected boolean wantOnSelectionChangedNotifications() {
            return true;
        }

        @Override
        protected void onSelectionChanged(Object newSelection) {
            // Do something here when selection is changed
        }
    };

Upvotes: 7

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