refs #649, allow to guess used simulator (for default values)

src/blackmisc/simulation/data/modelcaches.h

@@ -75,6 +75,13 @@ namespace BlackMisc
             //! Last selection
             struct ModelCacheLastSelection : public BlackMisc::CDataTrait<BlackMisc::Simulation::CSimulatorInfo>
             {
+                //! Default value
+                static const BlackMisc::Simulation::CSimulatorInfo &defaultValue()
+                {
+                    static const BlackMisc::Simulation::CSimulatorInfo s(BlackMisc::Simulation::CSimulatorInfo::guessDefaultSimulator());
+                    return s;
+                }
+
                 //! First load is synchronous
                 static constexpr bool isPinned() { return true; }
 
@@ -117,6 +124,13 @@ namespace BlackMisc
             //! Last selection
             struct ModelSetLastSelection : public BlackMisc::CDataTrait<BlackMisc::Simulation::CSimulatorInfo>
             {
+                //! Default value
+                static const BlackMisc::Simulation::CSimulatorInfo &defaultValue()
+                {
+                    static const BlackMisc::Simulation::CSimulatorInfo s(BlackMisc::Simulation::CSimulatorInfo::guessDefaultSimulator());
+                    return s;
+                }
+
                 //! First load is synchronous
                 static constexpr bool isPinned() { return true; }
 

src/blackmisc/simulation/simulatorinfo.cpp

@@ -189,26 +189,46 @@ namespace BlackMisc
         {
             //! \todo add XP, ...
             CSimulatorInfo sim;
-            bool fs9 =
+            bool fs9 = false;
+            bool fsx = false;
+            bool p3d = false;
+
+            if (CBuildConfig::isRunningOnWindowsNtPlatform())
+            {
+                fs9 =
                     CBuildConfig::isRunningOnWindowsNtPlatform() &&
                     !CFsCommonUtil::fs9AircraftDir().isEmpty() &&
                     !CFsCommonUtil::fs9Dir().isEmpty();
-            bool fsx =
+                fsx =
                     CBuildConfig::isRunningOnWindowsNtPlatform() &&
                     !CFsCommonUtil::fsxSimObjectsDir().isEmpty() &&
                     !CFsCommonUtil::fsxDir().isEmpty();
-            bool p3d =
+                p3d =
                     CBuildConfig::isRunningOnWindowsNtPlatform() &&
                     !CFsCommonUtil::p3dDir().isEmpty() &&
                     !CFsCommonUtil::p3dSimObjectsDir().isEmpty();
+            }
             bool xp = true; //! \todo XP resolution
 
-            sim.setSimulator(
+            sim.setSimulator(CSimulatorInfo::boolToFlag(fsx, fs9, xp, p3d));
-                CSimulatorInfo::boolToFlag(fsx, fs9, xp, p3d)
-            );
             return sim;
         }
 
+        const CSimulatorInfo CSimulatorInfo::guessDefaultSimulator()
+        {
+            CSimulatorInfo locallyInstalled(getLocallyInstalledSimulators());
+            if (CBuildConfig::isRunningOnLinuxPlatform())
+            {
+                return CSimulatorInfo("XPLANE");
+            }
+            if (locallyInstalled.p3d()) { return CSimulatorInfo("P3D"); }
+            if (locallyInstalled.fsx()) { return CSimulatorInfo("FSX"); }
+            if (locallyInstalled.fs9()) { return CSimulatorInfo("FS9"); }
+
+            // fallback
+            return CSimulatorInfo("FSX");
+        }
+
         CSimulatorInfo CSimulatorInfo::fromDatabaseJson(const QJsonObject &json, const QString prefix)
         {
             const bool fsx = CDatastoreUtility::dbBoolStringToBool(json.value(prefix + "simfsx").toString());

src/blackmisc/simulation/simulatorinfo.h

@@ -155,6 +155,9 @@ namespace BlackMisc
             //! Locally installed simulators
             static const CSimulatorInfo getLocallyInstalledSimulators();
 
+            //! Guess a default simulator
+            static const CSimulatorInfo guessDefaultSimulator();
+
             //! From database JSON
             static CSimulatorInfo fromDatabaseJson(const QJsonObject &json, const QString prefix);