Painting Classes

See also this introduction to the Qt coordinate system.

• QBitmap: The QBitmap class provides monochrome (1-bit depth) pixmaps.

• QBrush: The QBrush class defines the fill pattern of shapes drawn by QPainter.

• QColor: The QColor class provides colors based on RGB, HSV or CMYK values.

• QColorSpace: The QColorSpace class provides a color space abstraction.

• QColorTransform: The QColorTransform class is a transformation between color spaces.

• QConicalGradient: The QConicalGradient class is used in combination with QBrush to specify a conical gradient brush.

• QFont: The QFont class specifies a query for a font used for drawing text.

• QFontMetrics: The QFontMetrics class provides font metrics information.

• QFontMetricsF: The QFontMetricsF class provides font metrics information.

• QGenericMatrix: The QGenericMatrix class is a template class that represents a NxM transformation matrix with N columns and M rows.

• QGradient: The QGradient class is used in combination with QBrush to specify gradient fills.

• QIcon: The QIcon class provides scalable icons in different modes and states.

• QIconEngine: The QIconEngine class provides an abstract base class for QIcon renderers.

• QImage: The QImage class provides a hardware-independent image representation that allows direct access to the pixel data, and can be used as a paint device.

• QImageReader: The QImageReader class provides a format independent interface for reading images from files or other devices.

• QImageWriter: The QImageWriter class provides a format independent interface for writing images to files or other devices.

• QLine: The QLine class provides a two-dimensional vector using integer precision.

• QLineF: The QLineF class provides a two-dimensional vector using floating point precision.

• QLinearGradient: The QLinearGradient class is used in combination with QBrush to specify a linear gradient brush.

• QMargins: The QMargins class defines the four margins of a rectangle.

• QMarginsF: The QMarginsF class defines the four margins of a rectangle.

• QPageRanges: The QPageRanges class represents a collection of page ranges.

• QPagedPaintDevice: The QPagedPaintDevice class represents a paint device that supports multiple pages.

• QPaintDevice: The QPaintDevice class is the base class of objects that can be painted on with QPainter.

• QPaintEngine: The QPaintEngine class provides an abstract definition of how QPainter draws to a given device on a given platform.

• QPainter: The QPainter class performs low-level painting on widgets and other paint devices.

• QPainterPath: The QPainterPath class provides a container for painting operations, enabling graphical shapes to be constructed and reused.

• QPainterPathStroker: The QPainterPathStroker class is used to generate fillable outlines for a given painter path.

• QPdfWriter: The QPdfWriter class is a class to generate PDFs that can be used as a paint device.

• QPen: The QPen class defines how a QPainter should draw lines and outlines of shapes.

• QPixmap: The QPixmap class is an off-screen image representation that can be used as a paint device.

• QPoint: The QPoint class defines a point in the plane using integer precision.

• QPointF: The QPointF class defines a point in the plane using floating point precision.

• QPolygon: The QPolygon class provides a list of points using integer precision.

• QPolygonF: The QPolygonF class provides a list of points using floating point precision.

• QRadialGradient: The QRadialGradient class is used in combination with QBrush to specify a radial gradient brush.

• QRect: The QRect class defines a rectangle in the plane using integer precision.

• QRectF: The QRectF class defines a finite rectangle in the plane using floating point precision.

• QRegion: The QRegion class specifies a clip region for a painter.

• QRgba64: The QRgba64 struct contains a 64-bit RGB color.

• QRgbaFloat: The QRgbaFloat struct contains a four part RGBA floating-point color.

• QSize: The QSize class defines the size of a two-dimensional object using integer point precision.

• QSizeF: The QSizeF class defines the size of a two-dimensional object using floating point precision.

• QSupportedWritingSystems: The QSupportedWritingSystems class is used when registering fonts with the internal Qt fontdatabase.

• QTransform: The QTransform class specifies 2D transformations of a coordinate system.

• QVector2D: The QVector2D class represents a vector or vertex in 2D space.