Interface DropDown.ActivateCallback

All Superinterfaces:
FunctionPointer
Enclosing class:
DropDown
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 DropDown.ActivateCallback extends FunctionPointer

Functional interface declaration of the ActivateCallback callback.

See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    run()
    Emitted to when the drop down is activated.
    default MemorySegment
    toCallback(Arena arena)
    Creates a native function pointer to the upcall(MemorySegment) method.
    default void
    upcall(MemorySegment sourceDropDown)
    The upcall method is called from native code.

  • Method Details

    • run

      void run()

      Emitted to when the drop down is activated.

      The ::activate signal on GtkDropDown is an action signal and emitting it causes the drop down to pop up its dropdown.

      Since:
      4.6

    • upcall

      default void upcall(MemorySegment sourceDropDown)
      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