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# Main Window and Related Classes

These classes provide everything you need for a typical modern main application window, like the main window itself, menu and tool bars, a status bar, etc.

QAbstractEventDispatcher | Interface to manage Qt's event queue
QAction | Abstract user interface action that can be inserted into widgets
QActionGroup | Groups actions together
QApplication | Manages the GUI application's control flow and main settings
QCoreApplication | Event loop for console Qt applications
QDialogButtonBox | Widget that presents buttons in a layout that is appropriate to the current widget style
QDockWidget | Widget that can be docked inside a QMainWindow or floated as a top-level window on the desktop
QMainWindow | Main application window
QMdiArea | Area in which MDI windows are displayed
QMdiSubWindow | Subwindow class for QMdiArea
QMenu | Menu widget for use in menu bars, context menus, and other popup menus
QMenuBar | Horizontal menu bar
QSessionManager | Access to the session manager
QSizeGrip | Resize handle for resizing top-level windows
QStatusBar | Horizontal bar suitable for presenting status information
QSystemTrayIcon | Icon for an application in the system tray
QToolBar | Movable panel that contains a set of controls
QWidgetAction | Extends QAction by an interface for inserting custom widgets into action based containers, such as toolbars
QWorkspace | Workspace window that can be used in an MDI application