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b319da3f07
* Update some C# examples - Rename members that have been renamed in Godot's C# API for 4.0. - Change `delta` parameter type to `double`. - Ensure parameters match base declaration. - Other minor code fixes. --------- Co-authored-by: Paul Joannon <437025+paulloz@users.noreply.github.com>
91 lines
2.9 KiB
ReStructuredText
91 lines
2.9 KiB
ReStructuredText
.. _doc_handling_quit_requests:
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Handling quit requests
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======================
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Quitting
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--------
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Most platforms have the option to request the application to quit. On
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desktops, this is usually done with the "x" icon on the window title bar.
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On Android, the back button is used to quit when on the main screen (and
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to go back otherwise).
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Handling the notification
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-------------------------
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On desktop and web platforms, :ref:`Node <class_Node>` receives a special
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``NOTIFICATION_WM_CLOSE_REQUEST`` notification when quitting is requested from
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the window manager.
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On Android, ``NOTIFICATION_WM_GO_BACK_REQUEST`` is sent instead.
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Pressing the Back button will exit the application if
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**Application > Config > Quit On Go Back** is checked in the Project Settings
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(which is the default).
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.. note::
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``NOTIFICATION_WM_GO_BACK_REQUEST`` isn't supported on iOS, as
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iOS devices don't have a physical Back button.
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Handling the notification is done as follows (on any node):
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.. tabs::
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.. code-tab:: gdscript GDScript
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func _notification(what):
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if what == NOTIFICATION_WM_CLOSE_REQUEST:
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get_tree().quit() # default behavior
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.. code-tab:: csharp
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public override void _Notification(int what)
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{
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if (what == NotificationWmCloseRequest)
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GetTree().Quit(); // default behavior
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}
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When developing mobile apps, quitting is not desired unless the user is
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on the main screen, so the behavior can be changed.
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It is important to note that by default, Godot apps have the built-in
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behavior to quit when quit is requested from the window manager. This
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can be changed, so that the user can take care of the complete quitting
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procedure:
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.. tabs::
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.. code-tab:: gdscript GDScript
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get_tree().set_auto_accept_quit(false)
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.. code-tab:: csharp
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GetTree().SetAutoAcceptQuit(false);
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Sending your own quit notification
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----------------------------------
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While forcing the application to close can be done by calling
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:ref:`SceneTree.quit <class_SceneTree_method_quit>`, doing so will not send
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the ``NOTIFICATION_WM_CLOSE_REQUEST`` to the nodes in the scene tree.
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Quitting by calling :ref:`SceneTree.quit <class_SceneTree_method_quit>` will
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not allow custom actions to complete (such as saving, confirming the quit,
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or debugging), even if you try to delay the line that forces the quit.
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Instead, if you want to notify the nodes in the scene tree about the upcoming
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program termination, you should send the notification yourself:
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.. tabs::
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.. code-tab:: gdscript GDScript
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get_tree().get_root().propagate_notification(NOTIFICATION_WM_CLOSE_REQUEST)
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.. code-tab:: csharp
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GetTree().Root.PropagateNotification((int)NotificationWmCloseRequest);
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Sending this notification will inform all nodes about the program termination,
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but will not terminate the program itself *unlike in 3.X*. In order to achieve
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the previous behavior, :ref:`SceneTree.quit <class_SceneTree_method_quit>` should
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be called after the notification.
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