The QStyleOption class stores the parameters used by QStyle functions.| doc.qt.io
The QFrame class is the base class of widgets that can have a frame.| doc.qt.io
The QCheckBox widget provides a checkbox with a text label.| doc.qt.io
The QDockWidget class provides a widget that can be docked inside a QMainWindow or floated as a top-level window on the desktop.| doc.qt.io