com.google.gwt.event.logical.shared

## Interface HasOpenHandlers<T>

- Type Parameters:
    `T` - the type being opened
  All Superinterfaces:
    HasHandlers
  All Known Implementing Classes:
    AbstractCellTree, CellBrowser, CellTree, DisclosurePanel, Tree

      public interface HasOpenHandlers<T>
      extends HasHandlers

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

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `HandlerRegistration` | `addOpenHandler(OpenHandler<T> handler)` Adds an `OpenEvent` handler.

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

      `fireEvent`

- - ### Method Detail

    - #### addOpenHandler

          HandlerRegistration addOpenHandler(OpenHandler<T> handler)

      Adds an `OpenEvent` handler.
      Parameters:
        `handler` - the handler
      Returns:
        the registration for the event