Package org.gnome.gtk

Interface EventControllerFocus.EnterCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

EventControllerFocus

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 EventControllerFocus.EnterCallback
extends FunctionPointer

Functional interface declaration of the EnterCallback callback.

See Also:

• run()

Method Summary

Modifier and Type	Method	Description
void	run()	Emitted whenever the focus enters into the widget or one of its descendents.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment) method.
default void	upcall(MemorySegment sourceEventControllerFocus)	The upcall method is called from native code.

Method Details

run

void run()

Emitted whenever the focus enters into the widget or one of its descendents.

Note that this means you may not get an ::enter signal even though the widget becomes the focus location, in certain cases (such as when the focus moves from a descendent of the widget to the widget itself). If you are interested in these cases, you can monitor the Gtk.EventControllerFocus:is-focus property for changes.

upcall

default void upcall(MemorySegment sourceEventControllerFocus)

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