Package org.gnome.gtk

Interface Gesture.SequenceStateChangedCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

Gesture

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 Gesture.SequenceStateChangedCallback
extends FunctionPointer

Functional interface declaration of the SequenceStateChangedCallback callback.

See Also:

• run(org.gnome.gdk.EventSequence, org.gnome.gtk.EventSequenceState)

Method Summary

Modifier and Type	Method	Description
void	run(@Nullable EventSequence sequence, EventSequenceState state)	Emitted whenever a sequence state changes.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, int) method.
default void	upcall(MemorySegment sourceGesture, MemorySegment sequence, int state)	The upcall method is called from native code.

Method Details

run

void run(@Nullable EventSequence sequence,
 EventSequenceState state)

Emitted whenever a sequence state changes.

See Gesture.setSequenceState(org.gnome.gdk.EventSequence, org.gnome.gtk.EventSequenceState) to know more about the expectable sequence lifetimes.

upcall

default void upcall(MemorySegment sourceGesture,
 MemorySegment sequence,
 int state)

The upcall method is called from native code. The parameters are marshaled and run(org.gnome.gdk.EventSequence, org.gnome.gtk.EventSequenceState) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

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

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the arena in which the function pointer is allocated

Returns:

the native function pointer