QT坐标变换
?--------------------------------------------------
?? QPainter painter(this);
?? QTransform transform;//以下四句代码是坐标变换
??? transform.translate(240,150);
??? transform.rotate(180,Qt::XAxis);
??? painter.setWorldTransform(transform);
?? --------------------------------------------------
来源:http://blog.sina.com.cn/s/blog_640531380100r59y.html