The QAbstractSlider class provides an integer value within a range.| doc.qt.io
The QFrame class is the base class of widgets that can have a frame.| doc.qt.io
The QWidget class is the base class of all user interface objects.| doc.qt.io
The QObject class is the base class of all Qt objects.| 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