Request Screen Modification

By: D. Towell

Summary: A common multimedia problem is the on-screen presentation of multiple actors. Each object updates its appearance by requesting a third party to modify an area of the screen. The third party then requests that each object redraw the appropriate section of itself.

Pattern: Request Screen Modification

A common multimedia problem is the on-screen presentation of multiple actors. To give the impression of depth, objects are ordered. This allows an object to be partially covered by a closer object. Each object updates its appearance by requesting a third party to modify an area of the screen. The third party then requests that each object redraw the appropriate section of itself.

Published in: PLoPD1
Pages: 555-556
Category: GUI Development, Multimedia