The question is: if only Activity uses the "old" event bus, and that one happens to be provided by ActivityManager (which has a dependency on the "new" event bus), and why couldn't you use the "new" event bus everywhere else than the Activity#start method?
bind(com.google.web.bindery.event.shared.EventBus.class).to(com.google.web.bindery.event.shared.SimpleEventBus.class).in(Singleton.class); @Provides PlaceController providePlaceController(com.google.web.bindery.event.shared.EventBus bus) { return new PlaceController(bus); } @Provides PlaceHistoryHandler providePlaceHistoryHandler(PlaceHistoryMapper mapper) { return new PlaceHistoryHandler(mapper); } ... ActivityManager manager = new ActivityManager(injector.activityMapper() // simplification: assumes a single ActivityManager/ActivityMapper injector.eventBus()); manager.setDisplay(display); PlaceHistoryHandler phh = injector.placeHistoryHandler(); phh.register(injector.placeController(), injector.eventBus(), defaultPlace); phh.handleCurrentHistory(); Everything above compiles OK, right? Now, why that class would make it fail to compile then: class MyActivity extends AbstractActivity { public void start(AcceptsOneWidget panel, com.google.gwt.event.shared.EventBus bus) { panel.setWidget(new Label("Hello World!"); } } The activity has no dependency on the singleton/global event bus, and the one passed to its start() method doesn't come from GIN; so what's the problem? And if you need to get injected the global event bus, for whatever reason, then just do it: import com.google.web.bindery.event.shared.EventBus; class MyActivity extends AbstractActivity { @Inject EventBus globalBus; public void start(AcceptsOneWidget panel, com.google.gwt.event.shared.EventBus bus) { panel.setWidget(new Label("Hello World!"); globalBus.fireEvent(new StartedEvent("hello world")); } } -- 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/-/d0Jg6FOXL98J. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.