Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!snorkelwacker.mit.edu!bloom-beacon!LARRY.MCRCIM.MCGILL.EDU!mouse
From: mouse@LARRY.MCRCIM.MCGILL.EDU
Newsgroups: comp.windows.x
Subject: Re:  Popup problems under twm, tvtwm but not mwm
Message-ID: <9011230609.AA12183@Larry.McRCIM.McGill.EDU>
Date: 23 Nov 90 06:09:52 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 43

> Is there anyone out there who can confirm or deny the following
> statement.??

> The correct behaviour of APPLICATION_MODAL popup widgets is at least
> partly dependent upon which window manager one uses.

This is widget-set dependent.  There is no technical reason why this
should be true; I understand Motif cheats.  As you discovered.
(Personally, I'd file a bug report with your vendor, but then, I'm
weird anyway.)

> Under mwm everything works just fine and dandy.  Under twm or tvtwm,
> however, the popup is visible to the window manager, its appearance
> does not stop events from being dispatched to the rest of the
> application, it does not get iconified along with the rest of the
> application, it can be lowered beneath the application's outermost
> window, etc. etc.  It would seem that twm treats the popup as a
> modeless (instead of modal) popup.

Well, perhaps twm doesn't have the notion of a modal popup....

> In the twm man page there is a little sentence tucked away which
> states:

> 	"DecorateTransients:     This variable indicates that transient
> 	windows (those containing a WM_TRANSIENT_FOR property) should
> 	have titlebars.  By default, transients are not reparented."
> 			 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Is this window you're popping up a transient?  The notion of a
transient window is a technical term; I have no a priori reason to
think that the window you're popping up is or is not a transient.
(Your description makes it sound as though it isn't, because twm is
decorating it and the default is to not decorate transients.)

In short, Motif made a portability choice: they chose to design their
widget set such that it breaks when not using their window manager.  I
think this was a stupid move on their part; presumably they disagree.

					der Mouse

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