Package org.gnome.gtk

Interface Widget.DestroyCallback

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.DestroyCallback
extends FunctionPointer

Functional interface declaration of the DestroyCallback callback.

See Also:

• run()

Method Summary

Modifier and Type	Method	Description
void	run()	Signals that all holders of a reference to the widget should release the reference that they hold.
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()

Signals that all holders of a reference to the widget should release the reference that they hold.

May result in finalization of the widget if all references are released.

This signal is not suitable for saving widget state.

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 arena in which the function pointer is allocated

Returns:

the native function pointer