Stop logging on last vehicle gone

src/comm/MAVLinkProtocol.cc

@@ -108,6 +108,10 @@ void MAVLinkProtocol::setToolbox(QGCToolbox *toolbox)
    connect(this, &MAVLinkProtocol::protocolStatusMessage, _app, &QGCApplication::criticalMessageBoxOnMainThread);
    connect(this, &MAVLinkProtocol::saveTempFlightDataLog, _app, &QGCApplication::saveTempFlightDataLogOnMainThread);
 
+#ifndef __mobile__
+   connect(_multiVehicleManager->vehicles(), &QmlObjectListModel::countChanged, this, &MAVLinkProtocol::_vehicleCountChanged);
+#endif
+
    emit versionCheckChanged(m_enable_version_check);
 }
 
@@ -217,13 +221,6 @@ void MAVLinkProtocol::_linkStatusChanged(LinkInterface* link, bool connected)
         }
         Q_UNUSED(found);
         Q_ASSERT(found);
-        
-#ifndef __mobile__
-        if (_connectedLinks.count() == 0) {
-            // Last link is gone, close out logging
-            _stopLogging();
-        }
-#endif
     }
 }
 
@@ -729,4 +726,12 @@ void MAVLinkProtocol::deleteTempLogFiles(void)
         QFile::remove(fileInfo.filePath());
     }
 }
+
+void MAVLinkProtocol::_vehicleCountChanged(int count)
+{
+    if (count == 0) {
+        // Last vehicle is gone, close out logging
+        _stopLogging();
+    }
+}
 #endif

src/comm/MAVLinkProtocol.h

@@ -284,6 +284,9 @@ signals:
     /// @brief Emitted when a temporary log file is ready for saving
     void saveTempFlightDataLog(QString tempLogfile);
 
+private slots:
+    void _vehicleCountChanged(int count);
+    
 private:
     void _linkStatusChanged(LinkInterface* link, bool connected);