WIP: track creation and deletion both in frontend and backend.

Scripts/Timeline.gd

@@ -37,23 +37,6 @@ func format_time_ms_minutes(ms: float) -> String:
 	var milliseconds = fmod(ms, 1000.0)
 	return "%02d:%02d.%03d" % [minutes, seconds, milliseconds]
 
-func _ready():
-	await get_tree().process_frame
-	queue_redraw()
-	
-	for c in track_list.get_children():
-		if c is Track:
-			var track = c as Track
-			track.on_deleted.connect(_track_deleted)
-			pass
-	pass
-
-func _track_deleted(idx: int):
-	print("track deleted")
-	await get_tree().process_frame
-	queue_redraw()
-	pass
-
 func get_track_idx_by_y(y: float):
 	var idx = 0
 	for track in track_list.get_children():
@@ -64,6 +47,8 @@ func get_track_idx_by_y(y: float):
 	return -1
 
 func get_track_by_idx(idx: int) -> Control:
+	if idx > track_list.get_child_count() - 1:
+		return null
 	return track_list.get_child(idx)
 
 func get_pixels_per_unit() -> float: