GraphMaker

Superclass

Model

Subclasses

CompositeGraphMaker, SingleGraphMaker, MonthlyGraphMaker

Subclass Responsibilities

#value, #columnLabels

Referenced By

none

This is an abstract class that changes the value to a format that the TableGraph class can
use.  It keeps a result to display, it can also do basic arithmetic operations, so that
the results can be accumulated over various results.  Refer to its subclasses for details.

Instance variables:
	value			<Collection<Collection<BlockValue>>	The result to display.
state   <CatState>	The state of the current business model.

Developed By Jee Ku (jku@cat.ncsa.uiuc.edu) and Joseph W. Yoder (yoder@cs.uiuc.edu)

Potential problems with this comment:

	Instance variable not commented - 
		value