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From: carroll@m.cs.uiuc.edu
Newsgroups: comp.windows.x
Subject: Re: EventMask for XSendEvent
Message-ID: <26900117@m.cs.uiuc.edu>
Date: 9 May 90 22:04:00 GMT
References: <26900116@m.cs.uiuc.edu>
Lines: 26
Nf-ID: #R:m.cs.uiuc.edu:26900116:m.cs.uiuc.edu:26900117:000:1511
Nf-From: m.cs.uiuc.edu!carroll    May  9 17:04:00 1990


Thanks to RWS I now have a better handle on the problem. Here is the back
ground information:
I'm working on Epoch 3.2 (GNUemacs with extensions for X windows), and I'm
trying to get epoch::send-client-message to work. Because of other
improvments, send-client-message can now send client messages to any other
X window. One thing that would be nice would be to be able to send WM
client messages, such as "Iconify Window". However, I can't see how to be
able to do this _and_ send "normal" client messages. I'm running on a
'386 386/ix box (R3) and a Sparc OS4.0.3 (R4), both running GWM 1.6

The problem is the EventMask for the XSendEvent. If I use 0, then "normal"
client messages work - I can send client messages from Epoch to itself.
However, sending ICCCM messages to the root window doesn't work. If I change
the EventMask to
	(SubstructureNotifyMask|SubstructureRedirectMask)
as specified in the ICCCM docs, sending WM messages works, but sending
"normal" ones doesn't. Under R3 I can reconcile these by using an EventMask
of ~0. However, RWS informs me that that will generate protocol errors under R4.
What is the preferred solution to this? I want to avoid either having the
Elisp programmer specify the EventMask, or having two calls for the two cases.

Alan M. Carroll                Barbara/Marilyn in '92 :
carroll@cs.uiuc.edu            + This time, why not choose the better halves?
Epoch Development Team         
CS Grad / U of Ill @ Urbana    ...{ucbvax,pur-ee,convex}!cs.uiuc.edu!carroll