绘图，没有时间完善了，有时间还有很多东西要做,我还从新做了个新的框架，还有很多框架上的问题,至于功能上的东西，我暂时不想去做了，现在这个能画直线，椭圆，矩形-Drawings, did not have time to perfect, and have time there are many things to do, I also re-make a new fr a mework, there are many problems in the fr a mework for the fun