Re: Views without presenters - how should they handle events?

Christian,

Thanks for the reply. I understand that mechanism. The point I was
making is that there is no presenter class because of the way the
Mailboxes view is created from the uiBinder xml.

Pete

On 28 July, 16:04, Christian Goudreau <goudreau.christ...@gmail.com>
wrote:
> Reference the presenter like explained in MVP part 2 :
>
>   public interface MyPresenter extends Presenter {
>     void onSave();
>   }
>
>   private MyPresenter presenter;
>
>   @Override
>   public  void setPresenter(MyPresenter presenter) {
>     this.presenter = presenter;
>   }
>
> Then in your presenter, you implements MyPresenter and call in the
> constructor : setPresenter(this);
>
> So final step :
>  @UiHandler("inBoxBtn")
>  void btnClicked(ClickEvent e) {
>    presenter.onSave();
>  }
>
> And voilà ! This is something really easy to implements in an MVP framework
> like Gwt-Platform and it's even easier than the ActivityManager of Gwt !
>
> Cheers,
>
> On Wed, Jul 28, 2010 at 10:39 AM, xworker <blomqvist.andr...@gmail.com>wrote:
>
>
>
> > Hi
>
> > For now I'm putting events on the eventbus from the view. Then in the
> > entrypoint class handle all the events. I send the eventbus in the
> > constructor to the view since I have'nt put in GIN yet. I will look
> > into the new AcitvityManager concept from the 2010 IO and the
> > PlaceManager.
>
> > /A
>
> > On 28 Juli, 16:23, PeteUK <newbar...@gmail.com> wrote:
> > > Hello,
>
> > > I'm starting with GWT and struggling to know how I should architect my
> > > program.
>
> > > I am using the Mail application's source code as a basis for mine, so
> > > I'm hoping this reaches others who have inspected the source for the
> > > Mail application.
>
> > > Within the Shortcuts area, are three sub-areas (stacks in the
> > > StackLayoutPanel): Mailboxes, Tasks, and Contacts. Inside Mailboxes,
> > > assume I replaced the tree with a single button "In Box", and created
> > > an event handler for it:
>
> > > public class Mailboxes extends Composite {
> > >  ...
>
> > >  @UiHandler("inBoxBtn")
> > >   void btnClicked(ClickEvent e) {
> > >     // TODO: HOW TO HANDLE THIS??
> > >   }
>
> > > }
>
> > > I am not sure how to proceed in internally architecting the handling
> > > code. The Mailboxes class is a view but doesn't really have an
> > > associated presenter. I have an "outer presenter" which really deals
> > > with the entire outer view of the application (the root layout panel).
> > > I've been thinking about the following choices but not sure how to
> > > proceed:
>
> > > 1) I could put these events on the event bus, and dependency-inject
> > > the event bus into the Mailboxes instance somehow (I'm looking into
> > > gin/guice as a separate thing).
>
> > > 2) I could define a Presenter interface for Mailboxes which has a
> > > callback for this button. The Mailboxes class is a view class with no
> > > corresponding presenter class though, so not sure how I could
> > > implement this! The Mailboxes instance is created in Shortcuts.ui.xml
> > > as follows:
>
> > >     <g:stack>
> > >       <g:header size='3'>Mailboxes</g:header>     // .N.B style divs
> > > removed for brevity
> > >       <mail:Mailboxes ui:field='mailboxes'/>           // <---
> > > Mailboxes instance created here
> > >     </g:stack>
>
> > > 3) Define a Presenter interface for Mailboxes and implement the
> > > callback in the outer presenter object. This means outer presenter is
> > > dealing with things a lot lower in the object tree than I feel it
> > > should.
>
> > > If your task was to extend the Mail application in this way, how would
> > > you think it should be done?
>
> > > Thanks,
>
> > > Pete
>
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>
> --
> Christian Goudreau

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