Method Detail

• mayStop

  java.lang.String mayStop()

  Called when the user is trying to navigate away from this activity.

  Returns:

  A message to display to the user, e.g. to warn of unsaved work, or null to say nothing

• onCancel

  void onCancel()

  Called when start(com.google.gwt.user.client.ui.AcceptsOneWidget, com.google.gwt.event.shared.EventBus) has not yet replied to its callback, but the user has lost interest.

• onStop

  void onStop()

  Called when the Activity's widget has been removed from view. All event handlers it registered will have been removed before this method is called.

• start

  void start(AcceptsOneWidget panel,
           EventBus eventBus)

  Called when the Activity should ready its widget for the user. When the widget is ready (typically after an RPC response has been received), receiver should present it by calling AcceptsOneWidget.setWidget(com.google.gwt.user.client.ui.IsWidget) on the given panel.

  Any handlers attached to the provided event bus will be de-registered when the activity is stopped, so activities will rarely need to hold on to the HandlerRegistration instances returned by EventBus.addHandler(com.google.web.bindery.event.shared.Event.Type<H>, H).

  Parameters:

  panel - the panel to display this activity's widget when it is ready

  eventBus - the event bus