Make SettingsManager an object instead of a namespace

scwx-qt/source/scwx/qt/manager/settings_manager.hpp

@@ -1,6 +1,9 @@
 #pragma once
 
 #include <string>
+#include <memory>
+
+#include <QObject>
 
 namespace scwx
 {
@@ -8,15 +11,28 @@ namespace qt
 {
 namespace manager
 {
-namespace SettingsManager
+
+class SettingsManager : public QObject
 {
+   Q_OBJECT
+   Q_DISABLE_COPY_MOVE(SettingsManager)
 
-void Initialize();
-void ReadSettings(const std::string& settingsPath);
-void SaveSettings();
-void Shutdown();
+public:
+   explicit SettingsManager();
+   ~SettingsManager();
+
+   void Initialize();
+   void ReadSettings(const std::string& settingsPath);
+   void SaveSettings();
+   void Shutdown();
+
+   static SettingsManager& Instance();
+
+private:
+   class Impl;
+   std::unique_ptr<Impl> p;
+};
 
-} // namespace SettingsManager
 } // namespace manager
 } // namespace qt
 } // namespace scwx