QPainter、QPainterPath、QBrush

 参考资料：

https://blog.csdn.net/qq_35488967/article/details/70802973
https://blog.csdn.net/wanghualin033/article/details/78633604
https://blog.csdn.net/liang19890820/article/details/51393152
https://blog.csdn.net/liang19890820/article/details/51154216
https://www.cnblogs.com/jiangu66/archive/2013/05/12/3074852.html
https://www.cnblogs.com/Jace-Lee/p/5946342.html

QPainter、QPainterPath、QBrush

原文：https://www.cnblogs.com/zhangxuan/p/10138722.html