Package org.gnome.gtk

Interface Widget.UnrealizeCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

Widget

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 Widget.UnrealizeCallback
extends FunctionPointer

Functional interface declaration of the UnrealizeCallback callback.

See Also:

• run()

Method Summary

Modifier and Type	Method	Description
void	run()	Emitted when the GdkSurface associated with widget is destroyed.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment) method.
default void	upcall(MemorySegment sourceWidget)	The upcall method is called from native code.

Method Details

run

void run()

Emitted when the GdkSurface associated with widget is destroyed.

This means that Widget.unrealize() has been called or the widget has been unmapped (that is, it is going to be hidden).

upcall

default void upcall(MemorySegment sourceWidget)

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

toCallback

default MemorySegment toCallback(Arena arena)

Creates a native function pointer to the upcall(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