E&S CVS Commit: PEAK - Refactor event sources to add 'DerivedValue' and 'DerivedCondition', while

[pje at eby-sarna.com]

Module Name:	PEAK
Committed By:	pje
Date:		Sat Jan 17 23:05:34 UTC 2004

Modified Files:
	PEAK/src/peak/events: interfaces.py sources.py
	PEAK/src/peak/events/tests: test_events.py

Log Message:
Refactor event sources to add 'DerivedValue' and 'DerivedCondition', while
also factoring out various useful abstract base classes ('Observable',
'Readable', 'Writable', and Conditional').


To view diffs of this commit, you can use the following URL(s):
http://cvs.eby-sarna.com/PEAK/src/peak/events/interfaces.py.diff?r1=1.4&r2=1.5
http://cvs.eby-sarna.com/PEAK/src/peak/events/sources.py.diff?r1=1.3&r2=1.4
http://cvs.eby-sarna.com/PEAK/src/peak/events/tests/test_events.py.diff?r1=1.2&r2=1.3

To generate a diff of this commit:
cvs rdiff -r1.4 -r1.5 PEAK/src/peak/events/interfaces.py
cvs rdiff -r1.3 -r1.4 PEAK/src/peak/events/sources.py
cvs rdiff -r1.2 -r1.3 PEAK/src/peak/events/tests/test_events.py

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