Fix: disable ESCGame inputs until signal room_ready is emitted (#582)

* Fix: disable ESCGame inputs until signal room_ready is emitted
* fix: add a new function to use in _input() to check for inputs

* Apply suggestions from code review
Co-authored-by: balloonpopper <5151242+balloonpopper@users.noreply.github.com>
Co-authored-by: Duncan Brown <duncan@prometheussoftware.ca>

addons/escoria-core/game/core-scripts/esc_game.gd

@@ -38,6 +38,11 @@ export(NodePath) var ui_parent_control_node
 # A reference to the node handling tooltips
 var tooltip_node: Object
 
+# Boolean indicating whether the game scene is ready to accept inputs 
+# from the player. This enables using escoria.is_ready_for_inputs() in _input()
+# function of game.gd script.
+var room_ready_for_inputs: bool = false
+
 
 # Function called when ESCGame enters the scene tree.
 func _enter_tree():
@@ -52,6 +57,12 @@ func _enter_tree():
 		"_on_action_finished"
 	)
 	
+	escoria.main.connect(
+		"room_ready", 
+		self, 
+		"_on_room_ready"
+	)
+
 
 # Function called when ESCGame exits the scene tree.
 func _exit_tree():
@@ -447,3 +458,8 @@ func escoria_show_ui():
 			"esc_game.gd#escoria_show_ui",
 			["UI parent Control node not defined!"]
 		)
+
+
+# Manage signal room_deady from main.gd.
+func _on_room_ready():
+	room_ready_for_inputs = true

addons/escoria-core/game/escoria.gd

@@ -389,3 +389,14 @@ func _handle_direct_scene_run() -> void:
 	if current_scene_root is ESCRoom:
 		escoria.object_manager.set_current_room(current_scene_root)
 
+
+# Used by game.gd to determine whether the game scene is ready to take inputs
+# from the _input() function. To do so, the current_scene must be set, the game
+# scene must be set, and the game scene must've been notified that the room
+# is ready.
+#
+# *Returns*
+# true if game scene is ready for inputs
+func is_ready_for_inputs() -> bool:
+	return escoria.main.current_scene and escoria.main.current_scene.game \
+			and escoria.main.current_scene.game.room_ready_for_inputs

addons/escoria-core/game/main.gd

@@ -90,10 +90,10 @@ func set_scene_finish() -> void:
 	current_scene.visible = true
 
 	clear_previous_scene()
-
 	emit_signal("room_ready")
 	
 
+
 # Cleanup the previous scene if there was one.
 func clear_previous_scene() -> void:
 	if previous_scene == null:

addons/escoria-ui-simplemouse/game.gd

@@ -97,10 +97,10 @@ func _exit_tree():
 
 
 func _input(event: InputEvent) -> void:
-	if escoria.main.current_scene and escoria.main.current_scene.game:
+	if escoria.is_ready_for_inputs():
-			if event is InputEventMouseMotion:
+		if event is InputEventMouseMotion:
-				escoria.main.current_scene.game. \
+			escoria.main.current_scene.game. \
-					update_tooltip_following_mouse_position(event.position)
+				update_tooltip_following_mouse_position(event.position)
 
 
 # https://github.com/godotengine/godot-demo-projects/blob/3.4-585455e/misc/joypads/joypads.gd