Add an OS.is_window_focused() getter

[Calinou]

This makes it possible to know whether the window is focused at a given time, without having to track the focus state manually using NOTIFICATION_WM_FOCUS_IN and NOTIFICATION_WM_FOCUS_OUT.

PS: I noticed Android makes use of those constants, but does it make sense to implement OS.is_window_focused() there? Can you run code in the game loop while the app is minimized?

This partially addresses #33928.

[capnm]

PS: I noticed Android makes use of those constants, but does it make sense to implement OS.is_window_focused() there? Can you run code in the game loop while the app is minimized?

This is after switching from app to android desktop and back:

InputEventMouseButton pressed: True[InputEventMouseButton:2947]SceneButtons
InputEventMouseButton pressed: False[InputEventMouseButton:3013]SceneButtons
I: NOTIFICATION_WM_FOCUS_OUT

I: NOTIFICATION_APP_PAUSED
I: NOTIFICATION_WM_FOCUS_IN
I: NOTIFICATION_APP_RESUMED
InputEventMouseButton pressed: True[InputEventMouseButton:3019]SceneButtons
InputEventMouseButton pressed: False[InputEventMouseButton:3097]SceneButtons
I: NOTIFICATION_WM_FOCUS_OUT

I: NOTIFICATION_APP_PAUSED
I: NOTIFICATION_WM_FOCUS_IN
I: NOTIFICATION_APP_RESUMED

func _notification(what):
	match what:
		NOTIFICATION_WM_FOCUS_IN:
			g.info("NOTIFICATION_WM_FOCUS_IN")
		NOTIFICATION_WM_FOCUS_OUT:
			g.info("NOTIFICATION_WM_FOCUS_OUT\n")
		NOTIFICATION_WM_QUIT_REQUEST:
			g.info("NOTIFICATION_WM_QUIT_REQUEST")

		NOTIFICATION_WM_MOUSE_ENTER:
			g.info("NOTIFICATION_WM_MOUSE_ENTER")
		NOTIFICATION_WM_MOUSE_EXIT:
			g.info("NOTIFICATION_WM_MOUSE_EXIT")

		# Android
		NOTIFICATION_APP_PAUSED :
			g.info("NOTIFICATION_APP_PAUSED")
		NOTIFICATION_APP_RESUMED :
			g.info("NOTIFICATION_APP_RESUMED")
		NOTIFICATION_WM_GO_BACK_REQUEST:
			g.info("NOTIFICATION_WM_GO_BACK_REQUEST")

[Calinou]

@capnm I see, it might not be very useful to implement it on Android then (unless I'm mistaken).

[capnm]

@capnm I see, it might not be very useful to implement it on Android then (unless I'm mistaken).

I would agree. There doesn't seem to be any Godot support for the Andoid wake lock.
If yes, please tell me ❓

I use this patch already without any issues on Linux. It's nice shortcut for focus dependent processing or in this case #16832 managing the game controller input.

I: tick 6300
I: tick 6400
InputEventMouseButton pressed: True[InputEventMouseButton:1945]SceneButtons
I: font size = 99
InputEventMouseButton pressed: False[InputEventMouseButton:2059]SceneButtons
I: NOTIFICATION_WM_FOCUS_OUT

I: NOTIFICATION_APP_PAUSED

The idle and physics loop is disabled when the app is out of focus.

I: NOTIFICATION_WM_FOCUS_IN
I: NOTIFICATION_APP_RESUMED
I: tick 6500

var fr: int = 0
func _process(delta: float):
	fr += 1
	if fr % 100 == 0:
		print("tick ", fr)

[akien-mga]

Thanks!