Interface AssistantPageFunc

All Superinterfaces:
FunctionPointer
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface @Generated("org.javagi.JavaGI") public interface AssistantPageFunc extends FunctionPointer

Functional interface declaration of the AssistantPageFunc callback.

See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    run(int currentPage)
    Type of callback used to calculate the next page in a GtkAssistant.
    default MemorySegment
    toCallback(Arena arena)
    Creates a native function pointer to the upcall(int, MemorySegment) method.
    default int
    upcall(int currentPage, MemorySegment data)
    The upcall method is called from native code.

  • Method Details

    • run

      int run(int currentPage)

      Type of callback used to calculate the next page in a GtkAssistant.

      It’s called both for computing the next page when the user presses the “forward” button and for handling the behavior of the “last” button.

      See Assistant.setForwardPageFunc(AssistantPageFunc).

      Parameters:
      currentPage - The page number used to calculate the next page.
      Returns:
      The next page number

    • upcall

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

    • toCallback

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