The QRegion class specifies a clip region for a painter.| doc.qt.io
The QPoint class defines a point in the plane using integer precision.| doc.qt.io
The QPaintDevice class is the base class of objects that can be painted on with QPainter.| doc.qt.io
The QSize class defines the size of a two-dimensional object using integer point precision.| doc.qt.io
The QBackingStore class provides a drawing area for QWindow.| doc.qt.io
The QWindow class represents a window in the underlying windowing system.| doc.qt.io