Package org.gnome.gtk

Interface GestureZoom.ScaleChangedCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

GestureZoom

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 GestureZoom.ScaleChangedCallback
extends FunctionPointer

Functional interface declaration of the ScaleChangedCallback callback.

See Also:

• run(double)

Method Summary

Modifier and Type	Method	Description
void	run(double scale)	Emitted whenever the distance between both tracked sequences changes.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, double) method.
default void	upcall(MemorySegment sourceGestureZoom, double scale)	The upcall method is called from native code.

Method Details

run

void run(double scale)

Emitted whenever the distance between both tracked sequences changes.

upcall

default void upcall(MemorySegment sourceGestureZoom,
 double scale)

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

toCallback

default MemorySegment toCallback(Arena arena)

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

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the function pointer will be allocated in this arena

Returns:

the native function pointer