Disable copy, move constructors when inheriting from QObject

src/base/net/dnsupdater.h

@@ -43,6 +43,7 @@ namespace Net
     class DNSUpdater : public QObject
     {
         Q_OBJECT
+        Q_DISABLE_COPY_MOVE(DNSUpdater)
 
     public:
         explicit DNSUpdater(QObject *parent = nullptr);

src/base/net/smtp.h

@@ -50,6 +50,7 @@ namespace Net
     class Smtp : public QObject
     {
         Q_OBJECT
+        Q_DISABLE_COPY_MOVE(Smtp)
 
     public:
         Smtp(QObject *parent = nullptr);

src/base/preferences.h

@@ -94,11 +94,6 @@ class Preferences : public QObject
 
     Preferences();
 
-    static Preferences *m_instance;
-
-signals:
-    void changed();
-
 public:
     static void initInstance();
     static void freeInstance();
@@ -414,4 +409,10 @@ public slots:
     void setTrackerFilterState(bool checked);
 
     void apply();
+
+signals:
+    void changed();
+
+private:
+    static Preferences *m_instance;
 };

src/base/rss/rss_parser.h

@@ -52,6 +52,7 @@ namespace RSS
         class Parser : public QObject
         {
             Q_OBJECT
+            Q_DISABLE_COPY_MOVE(Parser)
 
         public:
             explicit Parser(QString lastBuildDate);

src/base/settingsstorage.h

@@ -53,6 +53,8 @@ struct IsQFlags<QFlags<T>> : std::true_type {};
 class SettingsStorage final : public QObject
 {
     Q_OBJECT
+    Q_DISABLE_COPY_MOVE(SettingsStorage)
+
     SettingsStorage();
     ~SettingsStorage();