Basic game template addon

menus/scenes/game_scene/tutorial_manager.gd

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+extends Node
+## A script to add into a level or game scene to display tutorial windows.
+
+## A list of tutorial scenes to open, one after the other.
+@export var tutorial_scenes : Array[PackedScene]
+## If true, open the tutorials when the scene becomes ready.
+@export var auto_open : bool = false
+## Delay before opening the tutorials when the scene becomes ready.
+@export var auto_open_delay : float = 0.25
+
+func open_tutorials() -> void:
+	var _initial_focus_control : Control = get_viewport().gui_get_focus_owner()
+	for tutorial_scene in tutorial_scenes:
+		var tutorial_menu : Control = tutorial_scene.instantiate()
+		if tutorial_menu == null:
+			push_warning("tutorial failed to open %s" % tutorial_scene)
+			return
+		get_tree().current_scene.call_deferred("add_child", tutorial_menu)
+		await tutorial_menu.tree_exited
+		if is_inside_tree() and _initial_focus_control:
+			_initial_focus_control.grab_focus()
+
+func _ready() -> void:
+	if auto_open:
+		if auto_open_delay > 0.0:
+			await get_tree().create_timer(auto_open_delay, false).timeout
+		open_tutorials.call_deferred()