qt 画图相关

Paint System中总结了: qpainter –> qpaintengine->qpaintdevice

Coordinate System中总结了: The coordinate system is controlled by the QPainter class. Together with the QPaintDevice and QPaintEngine classes, QPainter form the basis of Qt's painting system, Arthur. QPainter is used to perform drawing operations, QPaintDevice is an abstraction of a two-dimensional space that can be painted on using a QPainter, and QPaintEngine provides the interface that the painter uses to draw onto different types of devices.

坐标系统式由qpainter来控制的。QPainter 是用来执行绘图操作。QPaintDevice 是一个可被绘制的二维空间。QPaintEngine 提供qpainter在不同设备上绘制的接口。

http://doc.qt.nokia.com/qq/qq16-background.html#newinqt41thebackingstore

The Arthur Paint System

http://doc.qt.nokia.com/4.7-snapshot/qt4-arthur.html

http://blog.csdn.net/dbzhang800/article/details/6835722