Interface EventControllerFocus.LeaveCallback

All Superinterfaces:
FunctionPointer
Enclosing class:
EventControllerFocus
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public static interface EventControllerFocus.LeaveCallback extends FunctionPointer

Functional interface declaration of the LeaveCallback callback.

See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    run()
    Emitted whenever the focus leaves the widget hierarchy that is rooted at the widget that the controller is attached to.
    default MemorySegment
    toCallback(Arena arena)
    Creates a native function pointer to the upcall(MemorySegment) method.
    default void
    upcall(MemorySegment sourceEventControllerFocus)
    The upcall method is called from native code.

  • Method Details

    • run

      void run()

      Emitted whenever the focus leaves the widget hierarchy that is rooted at the widget that the controller is attached to.

      Note that this means you may not get a ::leave signal even though the focus moves away from the widget, in certain cases (such as when the focus moves from the widget to a descendent). If you are interested in these cases, you can monitor the Gtk.EventControllerFocus:is-focus property for changes.

    • upcall

      default void upcall(MemorySegment sourceEventControllerFocus)
      The upcall method is called from native code. The parameters are marshaled and run() is executed.

    • toCallback

      default MemorySegment toCallback(Arena arena)
      Creates a native function pointer to the upcall(MemorySegment) method.
      Specified by:
      toCallback in interface FunctionPointer
      Parameters:
      arena - the arena in which the function pointer is allocated
      Returns:
      the native function pointer