Method registerClient

source/ui/widget/QKeyEdit.h:75–80

	static QKeyEditHookManager* instance()
	{
		static QKeyEditHookManager inst;
		return &inst;
	}
	void registerClient(QKeyEdit* client)
	{
		std::unique_lock lock(m_mutex);
		m_instances[client] = true;
		installHook();
	}