发现一个Doxygen风格的QT帮助

http://cep.xray.aps.anl.gov/software/qt4-x11-4.8.6-browser/classes.html

http://cep.xray.aps.anl.gov/software/qt4-x11-4.8.6-browser/d8/d24/class_q_paint_engine.html