Interface SwipeTracker.EndSwipeCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

SwipeTracker

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 SwipeTracker.EndSwipeCallback
extends FunctionPointer

Functional interface declaration of the EndSwipeCallback callback.

See Also:

• run(double, double)

Method Summary

Modifier and Type	Method	Description
void	run(double velocity, double to)	This signal is emitted as soon as the gesture has stopped.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(MemorySegment, double, double) method.
default void	upcall(MemorySegment sourceSwipeTracker, double velocity, double to)	The upcall method is called from native code.

Method Details

run

void run(double velocity,
 double to)

This signal is emitted as soon as the gesture has stopped.

The user is expected to animate the deceleration from the current progress value to to with an animation using velocity as the initial velocity, provided in pixels per second. SpringAnimation is usually a good fit for this.

upcall

default void upcall(MemorySegment sourceSwipeTracker,
 double velocity,
 double to)

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(MemorySegment, double, double) method.

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the arena in which the function pointer is allocated

Returns:

the native function pointer