Package org.gnome.gtk

Interface Label.MoveCursorCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

Label

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 Label.MoveCursorCallback
extends FunctionPointer

Functional interface declaration of the MoveCursorCallback callback.

See Also:

• run(org.gnome.gtk.MovementStep, int, boolean)

Method Summary

Modifier and Type	Method	Description
void	run(MovementStep step, int count, boolean extendSelection)	Gets emitted when the user initiates a cursor movement.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, int, int, int) method.
default void	upcall(MemorySegment sourceLabel, int step, int count, int extendSelection)	The upcall method is called from native code.

Method Details

run

void run(MovementStep step,
 int count,
 boolean extendSelection)

Gets emitted when the user initiates a cursor movement.

The ::move-cursor signal is a keybinding signal. If the cursor is not visible in entry, this signal causes the viewport to be moved instead.

Applications should not connect to it, but may emit it with GObjects.signalEmitByName(org.gnome.gobject.GObject, java.lang.String, java.lang.Object...) 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 characters/lines
• Ctrl+←, etc. move by words/paragraphs
• Home and End move to the ends of the buffer

upcall

default void upcall(MemorySegment sourceLabel,
 int step,
 int count,
 int extendSelection)

The upcall method is called from native code. The parameters are marshaled and run(org.gnome.gtk.MovementStep, int, boolean) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, 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