TetraIF migration and Unittest Implementation for it

Entire-Checkpoint: 14d1fef0cf36

qt6-after/qt6-migrated-legatus/TetraIF/LogView/LogViewMain.cpp

@@ -1,5 +1,6 @@
 #include <nglapplication/nglapplication.h>
 #include <QtGui/QScreen>
+#include <QtGui/QWindow>
 #include <QtCore/QSettings>
 #include <QNetworkProxy>
 #ifndef WIN32
@@ -39,8 +40,8 @@ int main(int argc, char *argv[])
   QNetworkProxy::setApplicationProxy(QNetworkProxy());
   app.createLogger("LogView", logConfigFileName.c_str());
 
-  QCoreApplication::setOrganizationName(QLatin1String("RME"));
-  QCoreApplication::setApplicationName(QLatin1String("LogView"));
+  QCoreApplication::setOrganizationName(QStringLiteral("RME"));
+  QCoreApplication::setApplicationName(QStringLiteral("LogView"));
 
   QSettings settings;
   settings.beginGroup(N_LogView::LogViewGui::WINDOW_GROUP);
@@ -48,7 +49,12 @@ int main(int argc, char *argv[])
   settings.endGroup();
 
   QScreen *screen = QGuiApplication::screens().value(screenNbr, QGuiApplication::primaryScreen());
-  N_LogView::LogViewGui* logViewGui = new N_LogView::LogViewGui(screen);
+  N_LogView::LogViewGui* logViewGui = new N_LogView::LogViewGui(nullptr);
+  // A QScreen is not a QWidget in Qt6, so the target screen can no longer be passed as the
+  // parent widget. Create the native window first, then assign it to the requested screen.
+  logViewGui->winId();
+  if (screen && logViewGui->windowHandle())
+    logViewGui->windowHandle()->setScreen(screen);
   logViewGui->show();
   int ret = app.exec();