AbstractActivity abstract class
Simple Activity implementation that is always willing to stop, and does nothing onStop and onCancel.
abstract class AbstractActivity implements Activity {
String mayStop() {
return null;
}
void onCancel() {
}
void onStop() {
}
}
Implements
Methods
String mayStop() #
Called when the user is trying to navigate away from this activity.
@return A message to display to the user, e.g. to warn of unsaved work, or
null to say nothing
String mayStop() {
return null;
}
void onCancel() #
Called when {@link #start} has not yet replied to its callback, but the user has lost interest.
void onCancel() {
}
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.
void onStop() {
}
abstract 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 {@link AcceptsOneWidget#setWidget} on the given panel. <p> 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 {@link com.google.gwt.event.shared.HandlerRegistration HandlerRegistration} instances returned by {@link EventBus#addHandler}.
@param panel the panel to display this activity's widget when it is ready @param eventBus the event bus