| Package | Description | 
|---|---|
| com.google.gwt.event.logical.shared | Types related to logical events that do not have direct analogues to DOM
 events and which can be used in contexts other than web browsers. | 
| com.google.gwt.user.client.ui | Widgets, Panels, and other user-interface classes. | 
| Modifier and Type | Method and Description | 
|---|---|
| GwtEvent.Type<BeforeSelectionHandler<T>> | BeforeSelectionEvent. getAssociatedType() | 
| static GwtEvent.Type<BeforeSelectionHandler<?>> | BeforeSelectionEvent. getType()Gets the type associated with this event. | 
| Modifier and Type | Method and Description | 
|---|---|
| HandlerRegistration | HasBeforeSelectionHandlers. addBeforeSelectionHandler(BeforeSelectionHandler<T> handler)Adds a  BeforeSelectionEventhandler. | 
| protected void | BeforeSelectionEvent. dispatch(BeforeSelectionHandler<T> handler) | 
| Modifier and Type | Class and Description | 
|---|---|
| (package private) static class  | ListenerWrapper.WrappedTabListenerDeprecated.  | 
| Modifier and Type | Method and Description | 
|---|---|
| HandlerRegistration | TabPanel. addBeforeSelectionHandler(BeforeSelectionHandler<java.lang.Integer> handler) | 
| HandlerRegistration | TabLayoutPanel. addBeforeSelectionHandler(BeforeSelectionHandler<java.lang.Integer> handler) | 
| HandlerRegistration | TabBar. addBeforeSelectionHandler(BeforeSelectionHandler<java.lang.Integer> handler) | 
| HandlerRegistration | StackLayoutPanel. addBeforeSelectionHandler(BeforeSelectionHandler<java.lang.Integer> handler) |