模仿windows自带的画图小软件mspaint，界面设计和mspaint一样，实现了画直线、折线、圆形、矩形。可以改变画笔颜色，改变填充颜色。可以进行图像的放大缩小等功能。-This software is similar with windows Mspaint .the interface is same with Mspaint. It can draw line,rectangle,circle .it also can change the color of line .besid