Initial commit

addons/walkabout/events/parallel_event.gd

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+@icon("parallel_event.svg")
+class_name WBParallelEvent
+extends WBEvent
+## Event that starts all child events at the same time, then finishes once all have completed.
+
+
+signal _children_finished()
+
+
+var _children_running: int = 0
+
+
+func _perform() -> void:
+	for child in get_children():
+		if child is WBEvent:
+			_start_child(child)
+	if _children_running > 0:
+		await _children_finished
+
+
+func _start_child(event: WBEvent) -> void:
+	_children_running += 1
+	await event.perform()
+	_children_running -= 1
+	if _children_running <= 0:
+		_children_finished.emit()