Re: EventBus mechanism

Seems that the onAddButtonClicked and onItemClicked methods perform some actions that involve other Presenters/Views that listen to those kinds of events. deleteSelectedContacts is just performing local changes that don´t affect other views. If there would be a different view that is showing a (for example) contact count and this view needs to know about some changes in your contacts, you would fire an event in deleteSelectedContacts.

Am Dienstag, 1. Mai 2012 15:01:20 UTC+2 schrieb Adio:

Hi everyone, now that i am working with GWT i am facing a problem with
the event handling mechanism the first problem was (
http://groups.google.com/group/google-web-toolkit/browse_thread/thread/17b679b499311756/8f06531e30bf0996#8f06531e30bf0996
), but when i read this article MVP II (
https://developers.google.com/web-toolkit/articles/mvp-architecture-2
) - actually i read it several times - i still don't understand when u
to use EventBus mechanism and when not ? and if i have to use when u
use EventBus Handler and HandlerManage ?.
Here is what confuses me:

public class ContactsPresenter implements Presenter,
ContactsView.Presenter<ContactDetails> {
......
public void onAddButtonClicked() {
    eventBus.fireEvent(new AddContactEvent());
  }

  public void onDeleteButtonClicked() {
    deleteSelectedContacts();
  }

  public void onItemClicked(ContactDetails contactDetails) {
    eventBus.fireEvent(new EditContactEvent(contactDetails.getId()));
  }

....
}

Why one method fires and event and the other just do some logic witch
is defined the class ?

Thank you all for your replies.

the source code of the example is here :
http://google-web-toolkit.googlecode.com/files/Tutorial-Contacts2.zip

--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/-4L9VQklj1QJ.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to google-web-toolkit+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.