Comments (5)
If we let you to remove handlers by event then the next thing will be to provide an API to add them back.
That would just make these more complicated.
If you need to manage an event independently from the rest of the class, best thing to do is to add handlers for it without EventBinder.
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Yeah, I agree with Goktug here. It's a lot easier to reason about how your class will work when either all @eventhandler methods are active or none of them are. Selectively removing handlers can make for really frustrating debugging when you're trying to figure out why one of your handlers isn't working and the rest all are.
If you want to be able to remove an individual handler, there's no reason you can't add it directly to the event bus and manage it outside of EventBinder - mixing @EventHandlers with normal calls to addHandler works fine. That way you can remove individual registrations while still having confidence that things declared as @EventHandlers will continue to work reliably.
Does that solution work for you?
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My opinion is different, it is not unusual to have visibility handlers that are added and removed automatically depending if something is shown or not.
I've made the proposition into a post to be able to specify the EventBinder on wich a EventHandler can be bound simply by adding a parameter inside the annotation that takes the .class of the EventBinder to register the events.
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@christiangoudreau, can you provide more concrete examples for your use cases?
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Dynamic places, Dynamic tabs (linked to places), other cases when you want only the visible presenters to update when an event is thrown. (Servers update) Etc.
Doesn't happen often in simple apps though
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Related Issues (20)
- Example is not working HOT 2
- Compilation from master failed. HOT 3
- Eventbinding in abstract classes. HOT 5
- Would be nice if example had one instance of removing handlers HOT 1
- GWT 2.6.0-rc1 : com.google.gwt.dev.util.Preconditions removed HOT 1
- Error compiling on gwt 2.6.0-rc1 HOT 2
- @EventHandler for base abstract events HOT 4
- Update to GWT 2.6 HOT 8
- Missing EventBinder.gwt.xml HOT 6
- How to use gwteventbinder with guice during unit test HOT 7
- Using @EventHandler in derivative classes HOT 2
- EventBinder module definition is incompatible with separate compilation landed on GWT trunk HOT 4
- GWT dependencies have wrong dependency scope? HOT 4
- Is there a way to restrict which classes can catch events?
- Support generic events
- Is GWT 2.7 supported? HOT 3
- Activity and Presenter should be in same class or in the same package HOT 2
- transitive dependency on GWT 2.6.0 HOT 6
- Safari on Mac OSX HOT 1
- event binder generator does not use canonicalname for implements type. HOT 6
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