3 Commits

Author	SHA1	Message	Date
Matthias Felleisen	d844256e25	- modified World so that it contains a specific Canvas ... deleted the canvas methods made it abstract so that programmers _must_ override the essential methods svn: r502	2005-07-30 16:52:06 +00:00
Matthias Felleisen	c9046e4e44	- created a Canvas class and implementation ... so that world can become an abstract class (well, we will pretend it is one; I have to ask Kathy how to do this) svn: r497	2005-07-30 02:11:50 +00:00
Eli Barzilay	017d151d59	Adding collects, with all the right properties (except eoln-style). ... svn: r3	2005-05-27 18:56:37 +00:00