Comments on Eduardo S. Nunes: GWT and MVP (Model View Presenter) Pattern

I have simple solving of my problem: I display con...

2010-02-24T14:12:07.758-08:00

I have simple solving of my problem:
I display constructor I create button's array with getter and put these buttons to the grid. In presenter I register these button as HasClickHandler and use their btnId.

But it seems that it's not the best idea

You can't use HasClickHandlers, you will have to i...

2010-02-22T03:26:49.302-08:00

You can't use HasClickHandlers, you will have to implement a specific Handler/Event that informs you about the click and some id which identifies the selected user.

Hi thank you for the gwt-mvp-example! But I have ...

2010-02-22T01:32:18.203-08:00

Hi

thank you for the gwt-mvp-example!
But I have a troubles with implemeting it :) For example I have a grid with user names and column with button "edit user". How can I expose from display these buttons as HasClickHandler() ?

Hi, I am trying to use HasValue it is throwing nu...

2010-02-16T11:41:26.411-08:00

Hi,
I am trying to use
HasValue
it is throwing null pointer exception. I used like this

@UiField TextBox materialWeight;
private DoubleWidgetBinder dblMaterialWeight = new DoubleWidgetBinder(0.0,materialWeight);
@Override
public HasValue materialWeight() {
System.out.println("dblMaterialWeight : "+dblMaterialWeight);
return dblMaterialWeight;
}
out put:- dblMaterialWeight : (null handle)

My other question follows along the lines of Brend...

2010-01-03T21:59:53.645-08:00

My other question follows along the lines of Brendens (most import question of mine is right before this one so answer that one first)
PlaceManager, were do you (view, presenter, or presenterImpl) Register the History?

sincerely,

Dave

(see ? before this one and thanks again)

Hi, I just set up a simplified version of the mvp-...

2010-01-03T21:44:46.563-08:00

Hi, I just set up a simplified version of the mvp-sample project. Mine is very simple, with 2 different views and buttons attached to each view that allow it to swith from one view to another.

What would happen if one of the buttons didnt just switch the view, but did a RPC call, but some json data back to populate a table. How do I make the current view(composite) react to these?

See im confused because the sample project the Handlers are registered to the mainpresenterImpl. How would I access the current presenters bound view's widgets to manipulate them?

This kinda falls in line with Jeff and Kango's questions I think, and they didnt get answered.

Please help.

Sincerely,

dave

ps: Great work by the way.

Eduadro, have you had a look at this similar proje...

2009-11-18T09:46:04.126-08:00

Eduadro, have you had a look at this similar project?

http://code.google.com/p/mvp4g/

What do you think about it?

Thanks

Hello, everyone is interested in printable and rea...

2009-10-22T20:21:30.142-07:00

Hello, everyone is interested in printable and readable version of Google IO about MVP, please look
http://extgwt-mvp4g-gae.blogspot.com/2009/10/gwt-app-architecture-best-practices.html

Yes, thank you. I just demoed a ui based on gwt-mv...

2009-09-10T17:04:28.709-07:00

Yes, thank you. I just demoed a ui based on gwt-mvp. The most loosely coupled UI I've ever written. Once I learned to import the correct Display. Once I figured out how to do something coding was easy.

How does the event bus handle multiple registrations of the same event/handler? Are there duplicates?

I just want to say thank you for the awesome work!...

2009-09-08T16:53:17.609-07:00

I just want to say thank you for the awesome work!

Sorry about the late to answer your comments. I di...

2009-08-18T10:17:38.924-07:00

Sorry about the late to answer your comments. I didn't receive any e-mail from blogger about the comments so I've just read them today. About gwt-presenter, I'm not using it, it was just a test. I did some modifications in my implementation. I will post these modifications as soon as possible. I will try to do it today.

Did you manage to get history / PlaceManager worki...

2009-08-18T04:34:52.087-07:00

Did you manage to get history / PlaceManager working when you used gwt-presenter?

On of the things Ray Ryan said was get history sorted out early.

Hi, Im trying to use retrograde analysis to analyz...

2009-08-10T14:36:05.672-07:00

Hi, Im trying to use retrograde analysis to analyze how you set your code up. I have it working in eclipse, but am a bit confused still.
Is it possible to javadoc comments added to the project?
Like for example, If i hover over HandlerManagerProvider, i get the basic javadoc
Author:
esnunes@gmail.com (Eduardo S. Nunes)
But no actual info about the class.
This would be really helpful to the many many people im SURE are going to be checking this out in the near future.

Sincerely,

dave

Looks VERY interesting. Thanks for the show how.

2009-08-09T13:44:42.004-07:00

Looks VERY interesting.
Thanks for the show how.

I'm in this situation as well. I'm wondering how ...

2009-08-07T07:23:03.142-07:00

I'm in this situation as well. I'm wondering how far down the widget stack to take this.

Just getting to grips with gwt-presenter which is an excellent starting point.

I am curious about the appropriate level of MVP-gr...

2009-08-04T13:05:59.149-07:00

I am curious about the appropriate level of MVP-granularity. I have done most of my GUI-esque programming in JFace/SWT with eclipse plug-in programming.

This lends itself to a certain level of granularity. For example the IssueDisplayWidget and IssueEditWidget are what may be compared to Views in the eclipse world. They are composite with some buttons, and one or more lower level widgets that map to some data.

For the actual lower level components though there is still need for some MVC/MVP concern. For example I could add an IssueListWidget, a presenter, and events wired appropriately to display this new widget. The question I have is that if I were to have some buttons and a table - should I have IssueListWidget handle the eventBus interaction and just use regular old attached listeners to update between IssueListWidget and the underlying table? Or is there any need to make the table have its own presenter and events?

I would be curious to hear thoughts on pros and cons on various ways this could be handled.

Chad, This is part of the DI handling. The speci...

2009-08-04T12:54:58.111-07:00

Chad,

This is part of the DI handling. The specific .get() you are asking about is actually on com.google.inject.Provider.

Some good intros are here, and here.

Basically it is finding a concrete class that implements IssueDisplayPresenter; then instantiates it, and gives you the reference.

I know this is probably basic and I am overlooking...

2009-07-14T21:09:15.611-07:00

I know this is probably basic and I am overlooking something, but In the source code for the MailPresenterImpl you have the following code:

private void doIssueUpdated(Issue issue) {
BaseView displayView = displayPresenter.get().showIssue(issue);
view.addContent(displayView);
}

where is the method .get() on displayPresenter defined?