实现简单的绘图功能,可以选择绘图属性形状,颜色,宽度等,以及对图形的保存.功能不完善,有待大家的更新.实现简单的绘图功能,可以选择绘图属性形状,颜色,宽度等,以及对图形的保存.功能不完善,有待大家的更新.-Simple graphics, you can choose to graphics attributes shape, color, width, etc., as well as the preservation of graphics. Functional imperfect, to