Manager: Warn on close when machines are running

src/qt/qt_vmmanager_main.cpp

@@ -459,6 +459,12 @@ VMManagerMain::onPreferencesUpdated()
     }
 }
 
+int
+VMManagerMain::getActiveMachineCount()
+{
+    return vm_model->getActiveMachineCount();
+}
+
 #if EMU_BUILD_NUM != 0
 void
 VMManagerMain::backgroundUpdateCheckStart() const

src/qt/qt_vmmanager_main.hpp

@@ -77,6 +77,7 @@ public slots:
 #endif
     void modelDataChange();
     void onPreferencesUpdated();
+    int  getActiveMachineCount();
 
 private:
     Ui::VMManagerMain *ui;

src/qt/qt_vmmanager_mainwindow.cpp

@@ -27,6 +27,7 @@
 #include <QLineEdit>
 #include <QStringListModel>
 #include <QCompleter>
+#include <QCloseEvent>
 #include <QDesktopServices> 
 
 VMManagerMainWindow::
@@ -159,6 +160,15 @@ VMManagerMainWindow::saveSettings() const
 void
 VMManagerMainWindow::closeEvent(QCloseEvent *event)
 {
+    int running = vmm->getActiveMachineCount();
+    if (running > 0) {
+        QMessageBox warningbox(QMessageBox::Icon::Warning, tr("%1 VM Manager").arg(EMU_NAME), tr("%1 machine(s) are currently active. Are you sure you want to exit the VM manager anyway?").arg(running), QMessageBox::Yes | QMessageBox::No, this);
+        warningbox.exec();
+        if (warningbox.result() == QMessageBox::No) {
+            event->ignore();
+            return;
+        }
+    }
     saveSettings();
     QMainWindow::closeEvent(event);
 }

src/qt/qt_vmmanager_model.cpp

@@ -161,3 +161,14 @@ VMManagerModel::getProcessStats()
     }
     return stats;
 }
+
+int
+VMManagerModel::getActiveMachineCount()
+{
+    int running = 0;
+    for (const auto& system: machines) {
+        if (system->getProcessStatus() != VMManagerSystem::ProcessStatus::Stopped)
+            running++;
+    }
+    return running;
+}

src/qt/qt_vmmanager_model.hpp

@@ -57,6 +57,7 @@ public:
     void reload(QWidget* parent = nullptr);
     void updateDisplayName(const QModelIndex &index, const QString &newDisplayName);
     QHash <QString, int> getProcessStats();
+    int getActiveMachineCount();
 signals:
     void systemDataChanged();