Hi all,
I have a problem with the Palette component:
I'm using a palette with a model populated by an EJB entity, and I want it
to show the correct selection status when it is displayed.
I mean that when the 'edit' button is clicked on a user, the current 'event'
that s\he has selected is shown
In code:
The following:
> /*all the events (2) - checked this - it's not null*/
> List<EventsEntity> events =
> LookupHelper.getInstance().lookupEventsEntityFacade().findAll();
> /*selected events for this user (same 2) - checked this - it's not
> null*/
> List<EventsEntity> selectedEvents = new
> ArrayList<EventsEntity>(model.getObject().getEvents());
> IChoiceRenderer<EventsEntity> renderer = new
> ChoiceRenderer<EventsEntity>("name", "id");
> palette =
> new Palette<EventsEntity>("palette",
> /*Selected Events*/new
> ListModel<EventsEntity>(selectedEvents),
> /*unselected*/new CollectionModel<EventsEntity>(events),
> renderer,
> 10,
> false);
>
> add(palette);
> //For debugging purposes:
> for (Iterator<EventsEntity> it = palette.getSelectedChoices();
> it.hasNext();) {
> EventsEntity eventsEntity = it.next();
> log.error("Selected choice: " + eventsEntity.getName());
> }
Throws an exception saying that the 'palette.getSelectedChoices();' returns
null
I would expect it to write the selected events to the log...
Am I doing something wrong? did I misunderstand the API?
it said:
> Palette
>
> public *Palette*(java.lang.String id,
> org.apache.wicket.model.IModel<java.util.Collection<T
> <http://static.ddpoker.com/javadoc/wicket-extensions/1.4-m2/org/apache/wicket/extensions/markup/html/form/palette/Palette.html>>>
> model,
> org.apache.wicket.model.IModel<java.util.Collection<? extends
> T
> <http://static.ddpoker.com/javadoc/wicket-extensions/1.4-m2/org/apache/wicket/extensions/markup/html/form/palette/Palette.html>>>
> choicesModel,
> org.apache.wicket.markup.html.form.IChoiceRenderer<T
> <http://static.ddpoker.com/javadoc/wicket-extensions/1.4-m2/org/apache/wicket/extensions/markup/html/form/palette/Palette.html>>
> choiceRenderer,
> int rows,
> boolean allowOrder)
>
> *Parameters:*id - Component idmodel - Model representing collection of
> user's selectionschoicesModel - Model representing collection of all
> available choiceschoiceRenderer - Render used to render choices. This must
> use unique IDs for the objects, not the index.rows - Number of choices to
> be visible on the screen with out scrollingallowOrder - Allow user to move
> selections up and down
Using Wicket 1.4, EJB 3, Jboss 5.1 inside of a Liferay Portal environment.
TiA,
Elad Katz.
