add seekbar

include/services/dbus/mpris.hpp

@@ -7,8 +7,7 @@
 
 class MprisController {
   public:
-
-    MprisController();
+    static std::shared_ptr<MprisController> getInstance();
 
     void toggle_play();
     void next_song();
@@ -17,6 +16,8 @@ class MprisController {
     sigc::signal<void(const MprisPlayer2Message &)> &signal_mpris_updated();
 
   private:
+    MprisController();
+
     Glib::RefPtr<Gio::DBus::Connection> m_connection;
     Glib::RefPtr<Gio::DBus::Proxy> m_proxy;
     sigc::signal<void(const MprisPlayer2Message &)> mprisUpdatedSignal;