Interface ListBox.MoveCursorCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

ListBox

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 ListBox.MoveCursorCallback
extends FunctionPointer

Functional interface declaration of the MoveCursorCallback callback.

See Also:

• run(MovementStep, int, boolean, boolean)

Method Summary

Modifier and Type	Method	Description
void	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 void	upcall(MemorySegment sourceListBox, int step, int count, int extend, int modify)	The upcall method is called from native code.

Method Details

run

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

Emitted when the user initiates a cursor movement.

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 void upcall(MemorySegment sourceListBox,
 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