Interface Widget.DestroyCallback

All Superinterfaces:
FunctionPointer
Enclosing class:
Widget
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 Widget.DestroyCallback extends FunctionPointer

Functional interface declaration of the DestroyCallback callback.

See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    run()
    Signals that all holders of a reference to the widget should release the reference that they hold.
    default MemorySegment
    toCallback(Arena arena)
    Creates a native function pointer to the upcall(MemorySegment) method.
    default void
    upcall(MemorySegment sourceWidget)
    The upcall method is called from native code.

  • Method Details

    • run

      void run()

      Signals that all holders of a reference to the widget should release the reference that they hold.

      May result in finalization of the widget if all references are released.

      This signal is not suitable for saving widget state.

    • upcall

      default void upcall(MemorySegment sourceWidget)
      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