Thanks. That worked a treat :D
On Oct 5, 10:35 am, Thomas Broyer <[email protected]> wrote:
> On 5 oct, 00:45, Chris Burrell <[email protected]> wrote:
>
>
>
> > Hi
>
> > I want to build a view in GWT but it is one of a few different types of
> > views. So I was thinking, I could
> > have them all share something common via inheritance, so that I could inject
> > any kind of view I'd like into my module...
> > I'm having trouble binding one of those things together. Any help would be
> > welcome...
>
> > Here's the idea:
>
> > The new abstract presenter that things will be based upon:
>
> > public abstract class StepModulePresenter<T extends
> > StepModulePresenter.Display> extends WidgetPresenter<T> {
>
> > public interface Display extends WidgetDisplay {
>
> > }
>
> > @Inject
> > public StepModulePresenter(T display, EventBus eventBus) {
> > super(display, eventBus);
> > }
>
> > }
>
> > It defines an interface that inherits the WidgetDisplay. Then for example, a
> > particular type of StepModulePresenter would be:
>
> > public class HistoryModulePresenter extends
> > StepModulePresenter<HistoryModulePresenter.Display> {
>
> > @Inject
> > public HistoryModulePresenter(Display display, EventBus eventBus) {
> > super(display, eventBus);
> > bind();
> > }
>
> > ...
>
> > }
>
> > So my view can be defined as:
> > public class HistoryModuleView extends Composite implements
> > HistoryModulePresenter.Display {
> > HistoryModuleView() { ... }
>
> > }
>
> > So far so good. Now I'd like to use my HistoryModuleView but passed in as a
> > StepModule in my Main app view:
>
> > public class MainView extends Composite implements MainPresenter.Display {
> > @Inject
> > public MainView(P1 p1, P2 p2, P3 p3,
> > StepModulePresenter<StepModulePresenter.Display> module) { ... }
>
> HistoryModulePresenter is a
> StepModulePresenter<HistoryModulePresenter.Display>, not a
> StepModulePresenter<StepModulePresenter.Display>, so you can't use one
> for the other (well, you can, but you'll have an "unchecked cast").
>
> I'd rather define the ctor as:
> @Inject
> public MainView(P1 p1, P2 p2, P3 p3, StepModulePresenter<? extends
> StepModulePresenter.Display> module) { ... }
>
> > What I don't get is how to bind the HistoryModule as the thing that gets
> > passed in here... And then later on, how I make it one of many things that
> > can be passed in:
>
> Not tested, but you should be able to write:
> bind(new TypeLiteral<StepModulePresenter<? extends
> StepModulePresenter.Display>() { }).to(HistoryModulePresenter.class);
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