OOP_(re)

Thu, 5 Jun 1997 19:49:12 -0400 (EDT)

On Thu, 5 Jun 1997, Frank Heckenbach wrote:

> Put the mode-dependent fields (those that change in all the view objects
> between text and graphic mode) into a separate object. There could be an
> (abstract) superclass, and special subclasses for text resp. graphics mode.
> The actual objects would contain a pointer of the abstract spureclass type,
> and the constructors would create text or graphics mode objects as desired.

My own UI library (that is to come a bit later than the base class
library) does it this way: I have a TVideo abstract object that I descend
into more specific objects. For example, theres a text mode object, a VGA
mode 13h object (oh gawd! does this look ugly!), S3 specific VGA object
(the card I use is a S3) and a VESA object that can do many modes...

Pierre Phaneuf

"The use of COBOL cripples the mind; its teaching should, therefore, be
regarded as a criminal offense." - Edsger W. Dijkstra.

Pierre Phaneuf (pp@dilu.ml.org)