A HCI design for developing touch-operation-based DGS: What you think is what you get

We present a man-friendly design for developing the touch-operation-based Dynamic Geometry Software (DGS). It is based on Human-Computer Interaction (HCI). The main concept of this design mode is What You Think is What You Get (WYTIWYG). User has two ways to create geometric constructions at will under this design concept. To archive this concept, five basic units have been designed, which can reduce the traditional menu operations for drawing.