Interface SpinButton.InputCallback

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.InputCallback extends FunctionPointer

Functional interface declaration of the InputCallback callback.

See Also:

  • Method Details

    • run

      int run(Out<Double> newValue)

      Emitted to convert the users input into a double value.

      The signal handler is expected to use Editable.getText() to retrieve the text of the spinbutton and set newValue to the new value.

      The default conversion uses g_strtod().

    • upcall

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

    • toCallback

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