Issue #37 GUI message when FPS drops below threshold

src/blackgui/components/loginadvcomponent.cpp

@@ -108,6 +108,7 @@ namespace BlackGui
             {
                 connect(sGui->getIContextSimulator(), &IContextSimulator::vitalityLost, this, &CLoginAdvComponent::autoLogoffDetection, Qt::QueuedConnection);
                 connect(sGui->getIContextSimulator(), &IContextSimulator::simulatorStatusChanged, this, &CLoginAdvComponent::onSimulatorStatusChanged, Qt::QueuedConnection);
+                connect(sGui->getIContextSimulator(), &IContextSimulator::insufficientFrameRateDetected, this, &CLoginAdvComponent::autoLogoffFrameRate, Qt::QueuedConnection);
             }
 
             // inital setup, if data already available
@@ -341,6 +342,22 @@ namespace BlackGui
             emit this->requestLoginPage();
         }
 
+        void CLoginAdvComponent::autoLogoffFrameRate(bool fatal)
+        {
+            //! \fixme code duplication with function above
+            if (!ui->cb_AutoLogoff->isChecked()) { return; }
+            if (!this->hasValidContexts()) { return; }
+            if (!sGui->getIContextNetwork()->isConnected()) { return; }
+
+            const auto msg = fatal
+                ? CStatusMessage(this, CStatusMessage::SeverityError, u"Sim frame rate too low to maintain constant simulation rate. Disconnecting to avoid disrupting the network.")
+                : CStatusMessage(this, CStatusMessage::SeverityWarning, u"Sim frame rate too low to maintain constant simulation rate. Reduce graphics quality to avoid disconnection.");
+            const int delaySecs = 30;
+            this->showOverlayHTMLMessage(msg, qRound(1000 * delaySecs * 0.8));
+
+            emit this->requestLoginPage();
+        }
+
         bool CLoginAdvComponent::updateOwnAircraftCallsignAndPilotFromGuiValues()
         {
             if (!this->hasValidContexts()) { return false; }

src/blackgui/components/loginadvcomponent.h

@@ -127,6 +127,9 @@ namespace BlackGui
             //! Auto-logoff detection
             void autoLogoffDetection();
 
+            //! Logoff due to insufficient simulator frame rate
+            void autoLogoffFrameRate(bool fatal);
+
             //! Pause/Continue timeout
             void toggleTimeout();
 

src/blackgui/components/logincomponent.cpp

@@ -146,6 +146,7 @@ namespace BlackGui
                 connect(sGui->getIContextSimulator(), &IContextSimulator::ownAircraftModelChanged, this, &CLoginComponent::onSimulatorModelChanged, Qt::QueuedConnection);
                 connect(sGui->getIContextSimulator(), &IContextSimulator::vitalityLost, this, &CLoginComponent::autoLogoffDetection, Qt::QueuedConnection);
                 connect(sGui->getIContextSimulator(), &IContextSimulator::simulatorStatusChanged, this, &CLoginComponent::onSimulatorStatusChanged, Qt::QueuedConnection);
+                connect(sGui->getIContextSimulator(), &IContextSimulator::insufficientFrameRateDetected, this, &CLoginComponent::autoLogoffFrameRate, Qt::QueuedConnection);
             }
 
             if (sGui && sGui->getIContextNetwork())
@@ -722,6 +723,23 @@ namespace BlackGui
             emit this->requestLoginPage();
         }
 
+        void CLoginComponent::autoLogoffFrameRate(bool fatal)
+        {
+            //! \fixme code duplication with function above
+            if (!ui->cb_AutoLogoff->isChecked()) { return; }
+            if (!this->hasValidContexts()) { return; }
+            if (!sGui->getIContextNetwork()->isConnected()) { return; }
+
+            const auto msg = fatal
+                ? CStatusMessage(this, CStatusMessage::SeverityError, u"Sim frame rate too low to maintain constant simulation rate. Disconnecting to avoid disrupting the network.")
+                : CStatusMessage(this, CStatusMessage::SeverityWarning, u"Sim frame rate too low to maintain constant simulation rate. Reduce graphics quality to avoid disconnection.");
+            const int delaySecs = 30;
+            this->showOverlayHTMLMessage(msg, qRound(1000 * delaySecs * 0.8));
+            if (fatal) { this->setLogoffCountdown(delaySecs); }
+
+            emit this->requestLoginPage();
+        }
+
         void CLoginComponent::lookupOwnAircraftModel()
         {
             if (!this->hasValidContexts()) { return; }

src/blackgui/components/logincomponent.h

@@ -182,6 +182,9 @@ namespace BlackGui
             //! Auto-logoff detection
             void autoLogoffDetection();
 
+            //! Logoff due to insufficient simulator frame rate
+            void autoLogoffFrameRate(bool fatal);
+
             //! Lookup own model
             void lookupOwnAircraftModel();