Qt’s 2D graphics engine is based on the
QPainter can draw geometric shapes (points, lines, rectangles, ellipses, arcs, chords, pie segments, polygons, and Bézier curves), as well as pixmaps, images, and text. Furthermore,
QPainter supports advanced features such as antialiasing (for text and shape edges), alpha blending, gradient filling, and vector paths.
QPainter also supports transformations, which makes it possible to draw resolution-independent 2D graphics.
QPainter can be used to draw on a ...