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# Abstract Widget Classes

These classes are abstract widgets; they are generally not usable in themselves, but provide functionality that can be used by inheriting these classes.

Classes:

- QButton (The abstract base class of button widgets, providing functionality common to buttons)
- QCanvas (2D graphic area upon which QCanvasItem objects exist)
- QDialog (The base class of dialog windows)
- QFrame (The base class of widgets that can have a frame)
- QScrollView (Scrolling area with on-demand scrollbars)
- QSemiModal (The base class of semi-modal dialog windows)
- QTableView (This is an abstract base class for implementing tables)
- QWidget (The base class of all user interface objects)
- QWizard (Framework for easily writing wizards)