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From: jkh@violet.berkeley.edu (Jordan K. Hubbard)
Newsgroups: comp.windows.x
Subject: hacking on uwm (V11)
Message-ID: <6037@jade.BERKELEY.EDU>
Date: Mon, 23-Nov-87 15:41:01 EST
Article-I.D.: jade.6037
Posted: Mon Nov 23 15:41:01 1987
Date-Received: Thu, 26-Nov-87 19:46:00 EST
Sender: usenet@jade.BERKELEY.EDU
Reply-To: jkh@violet.berkeley.edu (Jordan K. Hubbard)
Organization: University of California, Berkeley
Lines: 85

I've been hacking on Your Favorite Window Manager and Mine :-), uwm
to add title bars, autoraise and various other dubiously useful features.
I'd like to get some comments on the hacks (to see if anyone has better
ideas, or just plain hates these for some reason) and then describe some
of the problems I'm having.

There are some new "variables" that uwm lets you set:

[no]resizeobscure --	Makes the resize popup window sit on the resized window
			(the way it is now) or the upper left corner of the
			screen (like mapwindow popups).

[no]titles --		Put title frobs on all windows that aren't icons,
			overriding map redirect or InputOnly.

titlefont --		Set the font to use for titles.

[no]autoraise --	Annoyingly raise windows on focus like the old xterm.

By default, the text portion of the title is centered. I'll add an
option to put it elsewhere if someone gives me a good enough reason.

I'm also currently doing the title bar manipulation myself, though
if someone can give me a good enough reason to use the toolkit (and let me
know the heck I'm supposed to get the event processing stuff to
cooperate without major re-write) I'll use that.

I've added a hack that allows you to set boolean variables from
menus. I.E. The following is now possible:

	menu = "MISC OPS" {
	"Nozap":	nozap
	"zap":		zap
	"noobscure":	noresizeobscure
	"Focus":	f.focus		# for context
	}

If anyone can think of a case where setting numerics and strings(!)
is useful, let me know. I added numerics, but the grammer for was
a little gross so I took then back out. One prefers to have yacc check
the legality of these things before they ever get executed, since
uwm may be backgrounded somewhere by then. Functionality is questionable
for all but booleans (and even then..) since the values are merely
changed, nothing else is notified. Changing a font on the fly would
do nothing, for example, since they're all allocated on startup.

Now for the PROBLEMS..

For AutoRaise:

Let me know if I'm wrong, but by default the focus is in whatever window
contains the pointer, yes? So, wouldn't it follow to assume that a window
would get FocusIn and FocusOut events for this? Nope. How about at least
knowing when the Focus is grabbed? Yeah.. that works. but hmmm. This is
strange. I get a FocusIn when I do an XSetInputFocus on my window, but
when I do the SetFocus on another window afterwards, I get no FocusOut
on the original! Yuck! Why is this? In my case, I just wanted to
select a FocusChangeMask on the rootwindow and (hopefully) know when
any children got or lost the focus. Zilch.

Ok, so we forget about that for the moment and use Enter/Leave for the
more trival pointer-focus case. Well. Just how do I see the Enter/Leaves for
everybody? uwm already selects Substructure{Notify,Redirect}Mask on the
RootWindow, but that doesn't pass up Enter/Leave events, so I
also selected Enter/Leave for the RootWindow, which naturally worked only
when you went from the root into a child or vice/versa. How do I know
when I leave one sibling for another? No events are generated for the
root window, that's for sure.

I know I could solve all (the enter/leave, not the focus) this by
reparenting everyone and selecting for all the parents, but I really don't
want to do that unless the person has selected title bars. I'd like
each option to do only what's necessary to make itself work and not
depend on any other options being set.
Of course, if that's the only possible way to make it work, then I guess
uwm is just going to reparent the world whether it likes it or not.

Am I missing something really big? I've read the event section of the
Xlib manual more times than I care to count.

					Jordan Hubbard
					U.C. Berkeley

P.S. with the exception of autoraise, everything should be releasable
in a day or so.