Interface FlowBox.MoveCursorCallback

All Superinterfaces:
FunctionPointer
Enclosing class:
FlowBox
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 FlowBox.MoveCursorCallback extends FunctionPointer

Functional interface declaration of the MoveCursorCallback callback.

See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    run(MovementStep step, int count, boolean extend, boolean modify)
    Emitted when the user initiates a cursor movement.
    default MemorySegment
    toCallback(Arena arena)
    Creates a native function pointer to the upcall(MemorySegment, int, int, int, int) method.
    default int
    upcall(MemorySegment sourceFlowBox, int step, int count, int extend, int modify)
    The upcall method is called from native code.

  • Method Details

    • run

      boolean run(MovementStep step, int count, boolean extend, boolean modify)

      Emitted when the user initiates a cursor movement.

      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 come in two variants, the variant with the Shift modifier extends the selection, the variant without the Shift modifier does not. There are too many key combinations to list them all here.

      • ←, →, ↑, ↓ move by individual children
      • Home, End move to the ends of the box
      • PgUp, PgDn move vertically by pages

    • upcall

      default int upcall(MemorySegment sourceFlowBox, int step, int count, int extend, int modify)
      The upcall method is called from native code. The parameters are marshaled and run(MovementStep, int, boolean, boolean) is executed.

    • toCallback

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