The QPainterPath class provides a container for painting operations, enabling graphical shapes to be constructed and reused.| doc.qt.io
The QColor class provides colors based on RGB, HSV or CMYK values.| doc.qt.io
The Qt namespace contains miscellaneous identifiers used throughout the Qt library.| doc.qt.io
The QPen class defines how a QPainter should draw lines and outlines of shapes.| doc.qt.io
The QPainter class performs low-level painting on widgets and other paint devices.| doc.qt.io