Package org.gnome.adw

Interface NavigationView.GetNextPageCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

NavigationView

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 NavigationView.GetNextPageCallback
extends FunctionPointer

Functional interface declaration of the GetNextPageCallback callback.

See Also:

• run()

Method Summary

Modifier and Type	Method	Description
NavigationPage	run()	Emitted when a push shortcut or a gesture is triggered.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment) method.
default MemorySegment	upcall(MemorySegment sourceNavigationView)	The upcall method is called from native code.

Method Details

run

NavigationPage run()

Emitted when a push shortcut or a gesture is triggered.

To support the push shortcuts and gestures, the application is expected to return the page to push in the handler.

This signal can be emitted multiple times for the gestures, for example when the gesture is cancelled by the user. As such, the application must not make any irreversible changes in the handler, such as removing the page from a forward stack.

Instead, it should be done in the NavigationView::pushed handler.

upcall

default MemorySegment upcall(MemorySegment sourceNavigationView)

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