jiyuQT的坐标绘图的简单使用，使用双缓冲技术进行图形的快速放大缩小，鼠标事件的使用。The simple use of jiyuQT's coordinate drawing, the use of double buffering technology for rapid zooming in and out of graphics, the use of mouse events. (2018-04-06, QT, 171KB, 下载1次)