Used way proposed in MainWindow class.

--HG--
branch : develop

src/app/tape/tmainwindow.cpp

@@ -697,6 +697,12 @@ void TMainWindow::AboutApplication()
     aboutDialog->show();
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+void TMainWindow::AboutQt()
+{
+    QMessageBox::aboutQt(this, tr("About Qt"));
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 void TMainWindow::SaveGivenName()
 {
@@ -1706,7 +1712,7 @@ void TMainWindow::SetupMenu()
     AboutToShowWindowMenu();
 
     // Help
-    connect(ui->actionAboutQt, &QAction::triggered, qApp, &MApplication::aboutQt);
+    connect(ui->actionAboutQt, &QAction::triggered, this, &TMainWindow::AboutQt);
     connect(ui->actionAboutTape, &QAction::triggered, this, &TMainWindow::AboutApplication);
 }
 

src/app/tape/tmainwindow.h

@@ -81,6 +81,7 @@ private slots:
     void AboutToShowWindowMenu();
     void ShowWindow();
     void AboutApplication();
+    void AboutQt();
 
     void SaveGivenName();
     void SaveFamilyName();