Interface TextView.MoveViewportCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

TextView

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 TextView.MoveViewportCallback
extends FunctionPointer

Functional interface declaration of the MoveViewportCallback callback.

See Also:

• run(ScrollStep, int)

Method Summary

Modifier and Type	Method	Description
void	run(ScrollStep step, int count)	Gets emitted to move the viewport.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(MemorySegment, int, int) method.
default void	upcall(MemorySegment sourceTextView, int step, int count)	The upcall method is called from native code.

Method Details

run

void run(ScrollStep step,
 int count)

Gets emitted to move the viewport.

The ::move-viewport signal is a keybinding signal, which can be bound to key combinations to allow the user to move the viewport, i.e. change what part of the text view is visible in a containing scrolled window.

There are no default bindings for this signal.

upcall

default void upcall(MemorySegment sourceTextView,
 int step,
 int count)

The upcall method is called from native code. The parameters are marshaled and run(ScrollStep, int) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

Creates a native function pointer to the upcall(MemorySegment, 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