Package org.gnome.gtk

Interface SignalListItemFactory.SetupCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

SignalListItemFactory

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 SignalListItemFactory.SetupCallback
extends FunctionPointer

Functional interface declaration of the SetupCallback callback.

See Also:

• run(org.gnome.gobject.GObject)

Method Summary

Modifier and Type	Method	Description
void	run(@Nullable GObject object)	Emitted when a newly created listitem needs to be prepared for use.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment) method.
default void	upcall(MemorySegment sourceSignalListItemFactory, MemorySegment object)	The upcall method is called from native code.

Method Details

run

void run(@Nullable GObject object)

Emitted when a newly created listitem needs to be prepared for use.

It is the first signal emitted for every listitem.

The handler for this signal must call ListItem.setChild(org.gnome.gtk.Widget) to populate the listitem with widgets.

The Gtk.SignalListItemFactory::teardown signal is the opposite of this signal and can be used to undo everything done in this signal.

upcall

default void upcall(MemorySegment sourceSignalListItemFactory,
 MemorySegment object)

The upcall method is called from native code. The parameters are marshaled and run(org.gnome.gobject.GObject) 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 arena in which the function pointer is allocated

Returns:

the native function pointer