Interface Widget.RealizeCallback

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.RealizeCallback extends FunctionPointer

Functional interface declaration of the RealizeCallback callback.

See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    run()
    Emitted when widget is associated with a GdkSurface.
    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()

      Emitted when widget is associated with a GdkSurface.

      This means that Widget.realize() has been called or the widget has been mapped (that is, it is going to be drawn).

    • 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