Better handling of local changes in 'gitk'?

I like how gitk shows the local changes as an unnamed commit at the top, 
but what I *don't* like is how it just ignored the difference between 
stuff that has been added to the index, and stuff that hasn't..

It would be very nice to have *two* such commits (either or both of which 
just disappear), where the top-most is the diff to the index, and the 
second is the diff from the index to HEAD.

That would not only be useful in general, it would be a wonderful way to 
visually introduce people to the notion of what the staging area is all 
about.

I think "gitk" was a great way early in git history to show how the git 
commit history works and that it made a lot of people understand a lot 
more how everything tied together (in a way that would have been much 
nastier to visualize with just the SHA1's in "git log"), and I think it 
could do the same thing for the staging area, which still seems to 
occasionally come up as an issue that confuses some people.

But my inability with tcl/tk precludes me from actually changing the logic 
that does

	git diff-index HEAD

into two different things that do the two operations

	git diff-index --cached HEAD
	git diff-files

respectively and ties them together as the two fake commits...

Paul?

			Linus