The QWidgetAction class extends QAction by an interface for inserting custom widgets into action based containers, such as toolbars.| 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 QToolBar class provides a movable panel that contains a set of controls.| doc.qt.io
The QToolButton class provides a quick-access button to commands or options, usually used inside a QToolBar.| 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