Don't allow to set up GL waveforms if GL is not available

src/preferences/configobject.h

@@ -154,16 +154,27 @@ template <class ValueType> class ConfigObject {
     // returns QString().
     QString getValueString(const ConfigKey& key) const;
 
+    template<typename E>
+    struct is_qflags : std::false_type {};
+    template<typename E>
+    struct is_qflags<QFlags<E>> : std::true_type {};
+
     // Sets the value for key to ValueType(value), over-writing pre-existing
     // values. ResultType is serialized to string on a per-type basis.
-    template <class ResultType>
+    template<class ResultType>
+        requires(!std::is_enum_v<ResultType> && !is_qflags<ResultType>::value)
     void setValue(const ConfigKey& key, const ResultType& value);
     template<class EnumType>
-        requires std::is_enum_v<EnumType>
+        requires(std::is_enum_v<EnumType> && !is_qflags<EnumType>::value)
     // we need to take value as const ref otherwise the overload is ambiguous
     void setValue(const ConfigKey& key, const EnumType& value) {
         setValue<int>(key, static_cast<int>(value));
     };
+    template<class QFlagsType>
+        requires(is_qflags<QFlagsType>::value)
+    void setValue(const ConfigKey& key, const QFlagsType& value) {
+        setValue<int>(key, value.toInt());
+    }
 
     // Returns the value for key, converted to ResultType. If key is not present
     // or the value cannot be converted to ResultType, returns ResultType().
@@ -177,15 +188,21 @@ template <class ValueType> class ConfigObject {
 
     // Returns the value for key, converted to ResultType. If key is not present
     // or the value cannot be converted to ResultType, returns default_value.
-    template <class ResultType>
+    template<typename ResultType>
+        requires(!std::is_enum_v<ResultType> && !is_qflags<ResultType>::value)
     ResultType getValue(const ConfigKey& key, const ResultType& default_value) const;
     QString getValue(const ConfigKey& key, const char* default_value) const;
     template<typename EnumType>
-        requires std::is_enum_v<EnumType>
+        requires(std::is_enum_v<EnumType> && !is_qflags<EnumType>::value)
     EnumType getValue(const ConfigKey& key, const EnumType& default_value) const {
         // we need to take default_value as const ref otherwise the overload is ambiguous
         return static_cast<EnumType>(getValue<int>(key, static_cast<int>(default_value)));
     }
+    template<typename QFlagsType>
+        requires(is_qflags<QFlagsType>::value)
+    QFlagsType getValue(const ConfigKey& key, const QFlagsType& default_value) const {
+        return QFlagsType::fromInt(getValue<int>(key, default_value.toInt()));
+    }
 
     QMultiHash<ValueType, ConfigKey> transpose() const;