The Menus example demonstrates how menus can be used in a main window application.| doc.qt.io
The QMenu class provides a menu widget for use in menu bars, context menus, and other popup menus.| doc.qt.io
The QMainWindow class provides a main application window.| doc.qt.io
The QMenuBar class provides a horizontal menu bar.| doc.qt.io
Windows and Dialogs in Qt.| doc.qt.io
The QAction class provides an abstraction for user commands that can be added to different user interface components.| doc.qt.io