Interface SpinButton.ChangeValueCallback

All Superinterfaces:
FunctionPointer
Enclosing class:
SpinButton
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 SpinButton.ChangeValueCallback extends FunctionPointer

Functional interface declaration of the ChangeValueCallback callback.

See Also:

  • Method Details

    • run

      void run(ScrollType scroll)

      Emitted when the user initiates a value change.

      This is a keybinding signal.

      Applications should not connect to it, but may emit it with g_signal_emit_by_name() if they need to control the cursor programmatically.

      The default bindings for this signal are Up/Down and PageUp/PageDown.

    • upcall

      default void upcall(MemorySegment sourceSpinButton, int scroll)
      The upcall method is called from native code. The parameters are marshaled and run(ScrollType) is executed.

    • toCallback

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