The QWidgetAction class extends QAction by an interface for inserting custom widgets into action based containers, such as toolbars.| doc.qt.io
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 QFrame class is the base class of widgets that can have a frame.| 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