https://blog.csdn.net/XCJandLL/article/details/125631053
https://blog.csdn.net/qq_20792765/article/details/109840347
https://blog.csdn.net/qq_20792765/article/details/109768594
https://blog.csdn.net/qq_42964109/article/details/126884439
https://blog.csdn.net/zheng19880607/article/details/127351761
QPainter
https://developer.aliyun.com/article/947986