Basic model loader implementation for FG

src/blackmisc/simulation/flightgear/aircraftmodelloaderflightgear.h

@@ -0,0 +1,32 @@
+#include "blackmisc/simulation/aircraftmodelloader.h"
+#include <QPointer>
+
+namespace BlackMisc{
+    namespace Simulation {
+        namespace Flightgear {
+        class AircraftModelLoaderFlightgear : public Simulation::IAircraftModelLoader{
+
+
+            // IAircraftModelLoader interface
+        public:
+            bool isLoadingFinished() const;
+            AircraftModelLoaderFlightgear(QObject *parent = nullptr);
+
+            //! Parsed or injected models
+            void updateInstalledModels(const CAircraftModelList &models);
+
+        private:
+            Simulation::CAircraftModelList parseFlyableAirplaces(const QString &rootDirectory);
+            static const QString &fileFilterFlyable();
+            void addUniqueModel(const CAircraftModel &model, CAircraftModelList &models);
+            QPointer<CWorker> m_parserWorker;
+
+        protected:
+            void startLoadingFromDisk(LoadMode mode, const ModelConsolidationCallback &modelConsolidation, const QStringList &modelDirectories);
+        };
+        }
+    }
+
+
+}
+