Package org.gnome.gtk

Interface EventControllerScroll.ScrollCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

EventControllerScroll

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 EventControllerScroll.ScrollCallback
extends FunctionPointer

Functional interface declaration of the ScrollCallback callback.

See Also:

• run(double, double)

Method Summary

Modifier and Type	Method	Description
boolean	run(double dx, double dy)	Signals that the widget should scroll by the amount specified by dx and dy.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, double, double) method.
default int	upcall(MemorySegment sourceEventControllerScroll, double dx, double dy)	The upcall method is called from native code.

Method Details

run

boolean run(double dx,
 double dy)

Signals that the widget should scroll by the amount specified by dx and dy.

For the representation unit of the deltas, see EventControllerScroll.getUnit().

upcall

default int upcall(MemorySegment sourceEventControllerScroll,
 double dx,
 double dy)

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

toCallback

default MemorySegment toCallback(Arena arena)

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

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the function pointer will be allocated in this arena

Returns:

the native function pointer