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
The QKeySequence class encapsulates a key sequence as used by shortcuts.| doc.qt.io
The QLabel widget provides a text or image display.| doc.qt.io
The QWidget class is the base class of all user interface objects.| doc.qt.io
The QIcon class provides scalable icons in different modes and states.| doc.qt.io
The QAction class provides an abstraction for user commands that can be added to different user interface components.| doc.qt.io
The Qt namespace contains miscellaneous identifiers used throughout the Qt library.| doc.qt.io
The QString class provides a Unicode character string.| doc.qt.io