Fix joystick tx mode initialization

src/Joystick/Joystick.cc

@@ -75,6 +75,8 @@ Joystick::Joystick(const QString& name, int axisCount, int buttonCount, int hatC
         _rgButtonValues[i] = false;
     }
 
+    _updateTXModeSettingsKey(_multiVehicleManager->activeVehicle());
+
     _loadSettings();
 
     connect(_multiVehicleManager, &MultiVehicleManager::activeVehicleChanged, this, &Joystick::_activeVehicleChanged);
@@ -119,7 +121,7 @@ void Joystick::_setDefaultCalibration(void) {
     _saveSettings();
 }
 
-void Joystick::_activeVehicleChanged(Vehicle *activeVehicle)
+void Joystick::_updateTXModeSettingsKey(Vehicle* activeVehicle)
 {
     if(activeVehicle) {
         if(activeVehicle->fixedWing()) {
@@ -137,7 +139,16 @@ void Joystick::_activeVehicleChanged(Vehicle *activeVehicle)
             qWarning() << "No valid joystick TXmode settings key for selected vehicle";
             return;
         }
+    } else {
+        _txModeSettingsKey = NULL;
+    }
+}
 
+void Joystick::_activeVehicleChanged(Vehicle* activeVehicle)
+{
+    _updateTXModeSettingsKey(activeVehicle);
+
+    if(activeVehicle) {
         QSettings settings;
         settings.beginGroup(_settingsGroup);
         int mode = settings.value(_txModeSettingsKey, activeVehicle->firmwarePlugin()->defaultJoystickTXMode()).toInt();
@@ -152,8 +163,10 @@ void Joystick::_loadSettings(void)
 
     settings.beginGroup(_settingsGroup);
 
-    if(_txModeSettingsKey)
-        _transmitterMode = settings.value(_txModeSettingsKey, 2).toInt();
+    Vehicle* activeVehicle = _multiVehicleManager->activeVehicle();
+
+    if(_txModeSettingsKey && activeVehicle)
+        _transmitterMode = settings.value(_txModeSettingsKey, activeVehicle->firmwarePlugin()->defaultJoystickTXMode()).toInt();
 
     settings.beginGroup(_name);
 

src/Joystick/Joystick.h

@@ -181,6 +181,7 @@ private:
     virtual int _getAxis(int i) = 0;
     virtual uint8_t _getHat(int hat,int i) = 0;
 
+    void _updateTXModeSettingsKey(Vehicle* activeVehicle);
     int _mapFunctionMode(int mode, int function);
     void _remapAxes(int currentMode, int newMode, int (&newMapping)[maxFunction]);