MVP Framework in GWT 2.1 M1 ?

[metrixon]

I just downloaded the M1 release of GWT 2.1 and was wondering where I
can find more information on the MVP framework that will be part of
GWT 2.1.
I looked around the Javadocs but did not find anything like it. Is the
MVP framework already part of the M1 release ?

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[Frederic Conrotte]

I've asked myself the same question: "New MVP framework ? Where is the
doc?"

I guess they are talking about this one:
http://code.google.com/intl/fr/webtoolkit/articles/mvp-architecture.html

[Paul Stockley]

Its actually quite a bit different than what they have talked about in
the past. From a quick look I had, it appears to incorporate a bunch
of scafolding code generation, dynamic binding etc.You can take a look
at the bikeshed project in svn. I think it is still somewhat a work in
progress.

On May 20, 1:48 pm, Frederic Conrotte <frederic.conro...@gmail.com>
wrote:

[metrixon]

I think, the whole MVP with GWT thing is actually inspired by the talk
given by Ray Ryan on last year's Google IO (see http://www.youtube.com/watch?v=PDuhR18-EdM).
Currently, there are implementations available that do provide an MVP
infrastructure and implement other patterns as well:
- http://code.google.com/p/gwt-presenter/
- http://code.google.com/p/gwt-dispatch/
- http://code.google.com/p/gwt-platform/

However, it would be nice to see these features integrated into GWT
directly, therefore I'm really interested in how Google itself
implemented the patterns :-)
I know that the announcement was just yesterday but it would be great
to get more detailed information on the new features introduced in 2.1
(especially the new widgets and mvp).
Regarding the demo given during the keynote, I'd also like to know how
the automatic resizing for mobile screens takes place.
Kind regards,
Christian


On May 20, 7:48 pm, Frederic Conrotte <frederic.conro...@gmail.com>
wrote:

[Paul Stockley]

Actually I don't think it has much relation to that. I think it
originated from this:

http://code.google.com/p/google-web-toolkit/wiki/ValueStoreAndRequestFactory

On May 20, 2:03 pm, metrixon <metri...@gmail.com> wrote:
> I think, the whole MVP with GWT thing is actually inspired by the talk

> given by Ray Ryan on last year's Google IO (seehttp://www.youtube.com/watch?v=PDuhR18-EdM).

> Currently, there are implementations available that do provide an MVP
> infrastructure and implement other patterns as well:
> -http://code.google.com/p/gwt-presenter/
> -http://code.google.com/p/gwt-dispatch/

> -http://code.google.com/p/gwt-platform/

[metrixon]

Thanks for the link Paul - I'm afraid my answer overlapped with your
first reply.
I think we talk about two different features in 2.1:
first, there is the data binding stuff that was shown in great length
during the keynote and I agree that it seems to be originating form
the link you posted.
The other feature is the MVP infrastructure. To my mind, the MVP
framework has nothing to do with the server side but is intended for a
clean separation of concerns within the client layer. As far as I
understand MVP, it essentially decouples the actual view code from the
logic that handles the data (the Presenter), making the logic part a
lot easier to test.

Regarding the data binding part, there are some new classes that also
appear in the javadocs of M1 (Cell-Classes, ListView, Pager etc.) but
I haven't found anything regarding the MVP-Framework.

On 20 Mai, 20:10, Paul Stockley <pstockl...@gmail.com> wrote:
> Actually I don't think it has much relation to that. I think it
> originated from this:
>

> http://code.google.com/p/google-web-toolkit/wiki/ValueStoreAndRequest...

[Paul Stockley]

There is the data bound cell based list and tree widgets they talked
about. These are really independent of any mvp framework. However,
there is also server/client side data binding support that is part of
their new business application framework. The expenses application is
very different from the mvp stuff shown to date. If you look at the
bikeshed project in the 2.1 branch you can see the expenses
application code.

[lich...@gmail.com]

The expenses application code isn't that easy to follow, haven't
deciphered it yet. Even the author prefaces the nature of the code...

* This app is a mess right now, but it will become the showcase
example of a
* custom app written to RequestFactory

* UI shell for expenses sample app. A horrible clump of stuff that
should be
* refactored into proper MVP pieces.

[camerojo]

Am I right in assuming that eventually the intention is that CellList
will become an alternative to the existing ListBox?

[Jorel]

I started using another mvp framework for GWT called mvp4g.
So far I am quite happy with it. YMMV.
It is hosted here: http://code.google.com/p/mvp4g/

On May 20, 1:03 pm, metrixon <metri...@gmail.com> wrote:
> I think, the whole MVP with GWT thing is actually inspired by the talk

> given by Ray Ryan on last year's Google IO (seehttp://www.youtube.com/watch?v=PDuhR18-EdM).

> Currently, there are implementations available that do provide an MVP
> infrastructure and implement other patterns as well:

> -http://code.google.com/p/gwt-presenter/
> -http://code.google.com/p/gwt-dispatch/
> -http://code.google.com/p/gwt-platform/
>

[PhilBeaudoin]

From what I understand GWT's MVP classes are designed with SpringRoo's
automatic code generation in mind. As such, they might be a little
confusing for those of us who learned MVP's from Ray Ryan's talk and
Google's mvp-architecture documents.

A gwt-platform user has given SpringRoo + GWT's MVP classes a try and
reported on it in the GWTP group (http://groups.google.com/group/gwt-
platform/browse_thread/thread/862cab91ccb28d40). He says that this
results in a lot of artifacts which are harder to understand than an
app built on GWTP.

[Jeff Chimene]

On 05/22/2010 09:04 AM, PhilBeaudoin wrote:
> From what I understand GWT's MVP classes are designed with SpringRoo's
> automatic code generation in mind. As such, they might be a little
> confusing for those of us who learned MVP's from Ray Ryan's talk and
> Google's mvp-architecture documents.
>
> A gwt-platform user has given SpringRoo + GWT's MVP classes a try and
> reported on it in the GWTP group (http://groups.google.com/group/gwt-
> platform/browse_thread/thread/862cab91ccb28d40). He says that this
> results in a lot of artifacts which are harder to understand than an
> app built on GWTP.

Hi Phil,

You might not be able to answer this, but does this framework require
Java RPC, or is it open to any server-side CGI?

[pjulien]

It exists but the javadoc wasn't included for some reason. A
presenter is called "Activity". I'm guessing to make it more familiar
to Android development.

You can see the code for activities and places here:

http://code.google.com/p/google-web-toolkit/source/browse/branches/2.1/bikeshed/src/com/google/gwt/?r=8009#gwt/app/place%3Fstate%3Dclosed

On May 20, 4:44 am, metrixon <metri...@gmail.com> wrote:
> I just downloaded the M1 release ofGWT2.1and was wondering where I

[Anton Tanasenko]

Actually, it is on the javadoc page at
http://google-web-toolkit.googlecode.com/svn/javadoc/2.1/index.html
under com.google.gwt.app.place package.
It also includes PlaceManager, Activity (presenter) mappings

Bikeshed example, though clumpy, sheds plenty of light on how it can
be used.

On May 27, 3:24 pm, pjulien <pjul...@gmail.com> wrote:
> It exists but the javadoc wasn't included for some reason.  A
> presenter is called "Activity".  I'm guessing to make it more familiar
> to Android development.
>
> You can see the code for activities and places here:
>

> http://code.google.com/p/google-web-toolkit/source/browse/branches/2....

[M Shannon]

I've been taking a good look at this 2.1 MVP stuff - and in particular
the Expenses example (rev 8291)

http://google-web-toolkit.googlecode.com/svn/branches/2.1/bikeshed/src/com/google/gwt/sample/expenses/

I'm certainly not the best developer/architect going round, but I like
to think I'm pretty good at reading people's existing code/examples
and adapting/running with them as if they were my own.
This expenses example is a nightmare to follow. The bindings/wiring
of all the pieces both client and server is nuts.

I sure hope Spring Roo can generate an excellent CRUD starter
application for me based off my domain objects and their
relationships, cause there is no way in the world I could have come up
with anything like that application.

I thought hand-crafiting files that comprise a JSF app was difficult,
but this thing takes the cake. I sure hope the IDE has some new tools
to support this stuff.








On May 27, 11:38 pm, Anton Tanasenko <atg.sleepl...@gmail.com> wrote:
> Actually, it is on the javadoc page athttp://google-web-toolkit.googlecode.com/svn/javadoc/2.1/index.html

[Chris Boertien]

The one half of Expenses isnt even MVP. The one you access via
Expenses.html is a hard-wired app. That is the one they were showing
at Google I/O.

The other part, the Scaffold app I believe is what Roo spits out found
under Scaffold.html. I'm not sure as to just how much of that has been
hand tweaked and how much is straight up codegen. Of course, all of
that stuff is still under heavy development.

[Marco De Angelis]

In M2, things have been cleaned up a bit. The framework has been moved
out of bikeshed into "user" folder, thus promoted into gwt.jar and out
of bikeshed.jar file (Bikeshed contains only the example apps now). If
you're using Roo, you have to fix the POM manually or wait for Roo M2
to be released (should happen this week).

I agree that Expenses contains a lot of hard-coded stuff. I believe
they wanted to show something impressive at Google I/O, focusing on
the core design separations (Activities, Places, RequestFactory,
Records), knowing that the API definition was not 100% clean nor
clear.

Just as an example, the left-side tree View is somewhat crumpled, as
it does not separate RequestFactory queries (which should take place
in an Activity) from the View. Also, Expanses Details views are fired
via direct calls instead of Places events, and so on.
But I am confident that the example will improve alongside with the
framework. Personally, I'm diving into what's available today. It's
better than nothing and gives me a good heads up on the changes.

On Jun 22, 9:33 am, Chris Boertien <chris.boert...@gmail.com> wrote:
> The one half of Expenses isnt even MVP. The one you access via
> Expenses.html is a hard-wired app. That is the one they were showing
> at Google I/O.
>
> The other part, the Scaffold app I believe is what Roo spits out found
> under Scaffold.html. I'm not sure as to just how much of that has been
> hand tweaked and how much is straight up codegen. Of course, all of
> that stuff is still under heavy development.
>
>
>
> On Mon, Jun 21, 2010 at 11:00 PM, M Shannon <mshan...@gmail.com> wrote:
> > I've been taking a good look at this 2.1 MVP stuff - and in particular
> > the Expenses example (rev 8291)
>

> >http://google-web-toolkit.googlecode.com/svn/branches/2.1/bikeshed/sr...