The QPaintEngineState class provides information about the active paint engine's current state.| doc.qt.io
The QPalette class contains color groups for each widget state.| doc.qt.io
The QBrush class defines the fill pattern of shapes drawn by QPainter.| doc.qt.io
The QStyle class is an abstract base class that encapsulates the look and feel of a GUI.| doc.qt.io
The QDataStream class provides serialization of binary data to a QIODevice.| 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