The QScrollArea class provides a scrolling view onto another widget.| doc.qt.io
The QHeaderView class provides a header row or header column for item views.| doc.qt.io
The QAbstractSlider class provides an integer value within a range.| doc.qt.io
The QAbstractScrollArea widget provides a scrolling area with on-demand scroll bars.| doc.qt.io
The QPoint class defines a point in the plane using integer precision.| doc.qt.io
The QSize class defines the size of a two-dimensional object using integer point precision.| doc.qt.io
The QWidget class is the base class of all user interface objects.| doc.qt.io
The Qt namespace contains miscellaneous identifiers used throughout the Qt library.| doc.qt.io