com.google.gwt.event.logical.shared

## Interface HasBeforeSelectionHandlers<T>

- Type Parameters:
    `T` - the type about to be selected
  All Superinterfaces:
    HasHandlers
  All Known Implementing Classes:
    DecoratedTabBar, DecoratedTabPanel, StackLayoutPanel, TabBar, TabLayoutPanel, TabPanel

      public interface HasBeforeSelectionHandlers<T>
      extends HasHandlers

  A widget that implements this interface is a public source of `BeforeSelectionEvent` events.

- - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `HandlerRegistration` | `addBeforeSelectionHandler(BeforeSelectionHandler<T> handler)` Adds a `BeforeSelectionEvent` handler.

    - ### Methods inherited from interface com.google.gwt.event.shared.HasHandlers

      `fireEvent`

- - ### Method Detail

    - #### addBeforeSelectionHandler

          HandlerRegistration addBeforeSelectionHandler(BeforeSelectionHandler<T> handler)

      Adds a `BeforeSelectionEvent` handler.
      Parameters:
        `handler` - the handler
      Returns:
        the registration for the event