Utility method to get XPlane root directory

src/blackmisc/simulation/xplane/xplaneutil.cpp

@@ -91,6 +91,13 @@ namespace BlackMisc
                 return getLastExistingPathFromFile(xplaneInstallFilePath);
             }
 
+            QString CXPlaneUtil::xplaneRootDir()
+            {
+                if (!xplane10Dir().isEmpty()) { return xplane10Dir(); }
+                else if (!xplane9Dir().isEmpty()) { return xplane9Dir(); }
+                else { return {}; }
+            }
+
             QString CXPlaneUtil::xbusLegacyDir()
             {
                 QString legacyPath("/Resources/plugins/xbus/LegacyData");

src/blackmisc/simulation/xplane/xplaneutil.h

@@ -36,6 +36,10 @@ namespace BlackMisc
                 //! \todo Test on OSX
                 static QString xplane10Dir();
 
+                //! XPlane root directory
+                //! In case more then one XPlane version is found, the path to the highest version is used
+                static QString xplaneRootDir();
+
                 //! XBus legacy directory
                 static QString xbusLegacyDir();
             };