refs #236, aircraft indexer to read FSX/9 models on disk in background

src/blacksim/fscommon/aircraftindexer.h

@@ -0,0 +1,45 @@
+#ifndef BLACKSIM_FSCOMMON_AIRCRAFTINDEXER_H
+#define BLACKSIM_FSCOMMON_AIRCRAFTINDEXER_H
+
+#include "aircraftcfgentrieslist.h"
+#include <QObject>
+#include <QtConcurrent/QtConcurrent>
+
+namespace BlackSim
+{
+    namespace FsCommon
+    {
+        /*!
+         * \brief Indexer for all modelsThe CAircraftIndexer class
+         */
+        class CAircraftIndexer : QObject
+        {
+            Q_OBJECT
+
+        private:
+            //! Constructor
+            CAircraftIndexer(QObject *parent = nullptr);
+
+            CAircraftCfgEntriesList m_entries; //!< all entries
+
+        signals:
+            void entriesRead(int number);
+
+        public:
+            //! Single entity indexer
+            static CAircraftIndexer &indexer()
+            {
+                static CAircraftIndexer indexer;
+                return indexer;
+            }
+
+            //! Read for directory or re-read
+            static int read(const QString directory = "");
+
+            //! Read in background
+            static QFuture<int> readInBackground(const QString directory = "");
+
+        };
+    }
+}
+#endif // guard