Package org.gnome.gdk

Interface Surface.EventCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

Surface

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 Surface.EventCallback
extends FunctionPointer

Functional interface declaration of the EventCallback callback.

See Also:

• run(org.gnome.gdk.Event)

Method Summary

Modifier and Type	Method	Description
boolean	run(Event event)	Emitted when GDK receives an input event for surface.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment) method.
default int	upcall(MemorySegment sourceSurface, MemorySegment event)	The upcall method is called from native code.

Method Details

run

boolean run(Event event)

Emitted when GDK receives an input event for surface.

upcall

default int upcall(MemorySegment sourceSurface,
 MemorySegment event)

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

toCallback

default MemorySegment toCallback(Arena arena)

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

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the function pointer will be allocated in this arena

Returns:

the native function pointer