## Uses of Interface
com.google.gwt.event.logical.shared.HasBeforeSelectionHandlers

- Packages that use HasBeforeSelectionHandlers
  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.

- - ### Uses of HasBeforeSelectionHandlers in com.google.gwt.event.logical.shared

    Methods in com.google.gwt.event.logical.shared with parameters of type HasBeforeSelectionHandlers
    Modifier and Type | Method and Description
    --- | ---
    `static <T> BeforeSelectionEvent<T>` | BeforeSelectionEvent.`fire(HasBeforeSelectionHandlers<T> source, T item)` Fires a before selection event on all registered handlers in the handler manager.

  - ### Uses of HasBeforeSelectionHandlers in com.google.gwt.user.client.ui

    Classes in com.google.gwt.user.client.ui that implement HasBeforeSelectionHandlers
    Modifier and Type | Class and Description
    --- | ---
    `class` | `DecoratedTabBar` A `TabBar` that wraps each tab in a 2x3 grid (six box), which allows users to add rounded corners.
    `class` | `DecoratedTabPanel` A `TabPanel` that uses a `DecoratedTabBar` with rounded corners.
    `class` | `StackLayoutPanel` A panel that stacks its children vertically, displaying only one at a time, with a header for each child which the user can click to display.
    `class` | `TabBar` A horizontal bar of folder-style tabs, most commonly used as part of a `TabPanel`.
    `class` | `TabLayoutPanel` A panel that represents a tabbed set of pages, each of which contains another widget.
    `class` | `TabPanel` A panel that represents a tabbed set of pages, each of which contains another widget.