Issue #115 Blink the disconnect button to catch the user's attention

src/blackgui/components/logincomponent.cpp

@@ -204,6 +204,7 @@ namespace BlackGui
                 this->setOwnModelAndIcaoValues();
                 const bool isConnected = sGui->getIContextNetwork()->isConnected();
                 this->setUiLoginState(isConnected);
+                if (isConnected) { this->blinkDisconnectButton(); }
             }
 
             // we decided to make it difficult for users to disable it
@@ -817,6 +818,32 @@ namespace BlackGui
             ui->pb_Ok->setText(s);
         }
 
+        void CLoginComponent::blinkDisconnectButton()
+        {
+            ui->pb_Ok->setProperty("blinkOn", true);
+            static constexpr int blinkLength = 100;
+            static constexpr int blinkTimes = 10;
+
+            auto timer = new QTimer(this);
+            connect(timer, &QTimer::timeout, this, [this, timer, count = std::make_shared<int>(0)]
+            {
+                if (++*count <= blinkTimes)
+                {
+                    ui->pb_Ok->setProperty("blinkOn", !ui->pb_Ok->property("blinkOn").toBool());
+                }
+                else
+                {
+                    ui->pb_Ok->setProperty("blinkOn", false);
+                    timer->stop();
+                    timer->deleteLater();
+                }
+                ui->pb_Ok->style()->unpolish(ui->pb_Ok);
+                ui->pb_Ok->style()->polish(ui->pb_Ok);
+            });
+            timer->setObjectName("blinker");
+            timer->start(blinkLength);
+        }
+
         void CLoginComponent::highlightModelField(const CAircraftModel &model)
         {
             if (!model.hasModelString())      { ui->le_SimulatorModel->setProperty("validation", "error"); }

src/blackgui/components/logincomponent.h

@@ -200,6 +200,9 @@ namespace BlackGui
             //! Show / hide elements for UI depending on login state
             void setUiLoginState(bool connected);
 
+            //! Make disconnect button flash briefly to catch the user's attention
+            void blinkDisconnectButton();
+
             //! Own model and ICAO data for GUI and own aircraft
             void setOwnModelAndIcaoValues(const BlackMisc::Simulation::CAircraftModel &ownModel = {});
 

src/blackgui/share/qss/stdwidget.qss

@@ -237,6 +237,12 @@ QPushButton::disabled {
 
 QPushButton:pressed{ background-color: lightblue; }
 
+// Button blinks on to catch the user's attention
+QPushButton[blinkOn="true"] {
+  background-color: yellow;
+  color: black;
+}
+
 /**
 KEYPAD area buttons are in swift GUI stylesheet
 

src/swiftguistandard/swiftguistd.cpp

@@ -258,7 +258,13 @@ void SwiftGuiStd::loginRequested()
     }
     else
     {
+        const bool changed = MainPageLogin != ui->sw_MainMiddle->currentIndex();
         this->setMainPage(MainPageLogin);
+        if (!changed)
+        {
+            // fake changed signal to trigger blinking disconnect button (issue #115)
+            emit this->currentMainInfoAreaChanged(ui->sw_MainMiddle->currentWidget());
+        }
     }
 }