Qwt是基于Qt开发的第三方二维图形类库。网络上Qwt的资源比较少，这是楼主在Qt平台上面写的第一个Qwt例子。后续会继续上传有关Qwt的开发。-Qwt is based on the Qt graphics library developed by third Fanger Wei. Qwt resources on the network is relatively small, it is the landlord written in Qt platform above the firs