In my Display interface, I included a method like

Widget getWidgetView();

which (interestingly enough) returns a widget view of the display
object. this eliminates your casting problem, while still maintaining
a degree of anonymity for the Display interface.

On the command pattern thing, I created a project to work through what
I thought I was seeing. You can see it at

http://code.google.com/p/gwt-command-pattern/

Let me know if you have some suggestions on how to fix the issues I
describe there.

Thanks,

On Jun 29, 4:43 pm, Thomas Broyer <t.bro...@gmail.com> wrote:
> On 29 juin, 23:13, Daniel Jue <teamp...@gmail.com> wrote:
>
>
>
>
>
> > Does anyone have a working MVP/Eventbus sample of something simple
> > like the PhoneEditor?
> > I don't think I'm doing it right.  The code from the IO presentation
> > leaves out enough details so that I'm not sure what to do.
> > For instance, in my Presenter.class,
>
> > I have something like this:
> > public class Presenter {
> > ...
> > private Display display;
> >         interface Display {
> >                 HasClickHandlers getSaveButton();
> >                 HasClickHandlers getCancelButton();
> >                 HasClickHandlers getNumberField();
> >                 HasClickHandlers getLabelPicker();
> >         }
>
> Slide 59 shows getNumberField and getLabelPicker as HasValue<String>,
> not HasClickHandler (and Ray says that ListBox doesn't actually
> implement HasValue<String> but it's quite easy to make a
> HasValue<String> for a ListBox).
>
> >         void editPhone(Phone phone) {
> >                 this.phone = Phone.from(phone);
> >                 display.getNumberField().setValue(phone.getNumber());
> >                 display.getLabelPicker().setValue(phone.getLabel());
> >         }
> > ...}
>
> > Obviously, a HasClickHandlers object doesn't have a setValue method.
> > It doesn't feel like I should be casting to the widget here, since we
> > went through all the trouble of using the Display interface.
>
> http://code.google.com/intl/fr-FR/events/io/sessions/GoogleWebToolkit...
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