Direct Graphics Manipulation
Original Publication Date: 1989-May-01
Included in the Prior Art Database: 2005-Jan-28
This article describes a direct manipulation of graphics on the display screen using a pointing device with support of the graphics editor software. When graphics are selected to be edited, some supplementary graphics of control frame and control points are displayed along with the target graphics on the screen. The user or operator can scale, rotate, or move the graphics directly by handling the supplementary graphics. In this article, the terms of "control frame", "pointing device" and "dragging" are defined, as follows: Control frame: the smallest rectangle of which lines are completely horizontal or vertical and which encloses the whole graphics to be edited. Pointing device (P.D.): equipment used for pointing a certain position on the screen. A mouse is an example of a P.D.