这是简易的CAD制作，可以画矩形、圆形等，支持图形的移动，改变图形的大小。-This is a simple CAD production, can draw rectangles, circles, and support for mobile graphics, change the size of the graphic.

matlab代码，移动鼠标，当鼠标至图形上方，自动显示图形属性。-matlab code, move the mouse, when the mouse to the top of the graph automatically display graphics properties.