Cppcheck: Solve issues related to copy constructor

rtgui/previewloader.cc

@@ -80,6 +80,8 @@ public:
         threadPool_ = new Glib::ThreadPool(threadCount, 0);
     }
 
+    Impl(const Impl&) = delete;
+
     Glib::ThreadPool* threadPool_;
     MyMutex mutex_;
     JobSet jobs_;

rtgui/previewloader.h

@@ -45,6 +45,8 @@ class PreviewLoader
 {
 public:
 
+    PreviewLoader(const PreviewLoader&) = delete;
+
     /**
      * @brief Singleton entry point.
      *

rtgui/profilestore.h

@@ -176,6 +176,8 @@ private:
 public:
 
     ProfileStore();
+    ProfileStore (const ProfileStore&) = delete;
+
     ~ProfileStore();
     bool init ();
     void parseProfiles ();

rtgui/thumbimageupdater.cc

@@ -78,6 +78,8 @@ public:
         threadPool_ = new Glib::ThreadPool(threadCount, 0);
     }
 
+    Impl(const Impl&) = delete;
+
     Glib::ThreadPool* threadPool_;
 
     // Need to be a Glib::Threads::Mutex because used in a Glib::Threads::Cond object...

rtgui/thumbimageupdater.h

@@ -46,6 +46,8 @@ class ThumbImageUpdater
 
 public:
 
+    ThumbImageUpdater(const ThumbImageUpdater&) = delete;
+
     /**
      * @brief Singleton entry point.
      *