Newsgroups: comp.windows.open-look
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!caen!news.cs.indiana.edu!nstn.ns.ca!aucs.acadiau.ca!871579l
From: 871579l@aucs.AcadiaU.ca (Todd Lowe)
Subject: Help needed with XView TTY windows
Message-ID: <1991Mar20.030857.17629@aucs.AcadiaU.ca>
Reply-To: 871579l@aucs.acadiau.ca (Todd Lowe)
Organization: School of Computer Science, Acadia Univ., Nova Scotia
Date: Wed, 20 Mar 91 03:08:57 GMT
Lines: 52


I'm working on a project under XView 2.0, and one of the 
things is a tty window that output from external programs
goes into.  I have a few questions, but don't have any manuals
only the distribution examples. (manuals are on order ...)

I create a tty:

   frame=(Frame)xv_create(NULL,FRAME,
					FRAME_LABEL, "Output",
					XV_WIDTH,  640,
					XV_HEIGHT, 125,
					FRAME_SHOW_FOOTER, TRUE,
					NULL);


   tty = (Tty)xv_create(frame, TTY, 
				    TTY_ARGV, my_argv,
				    NULL);

where frame is the parent frame, and my_argv[]={"echo","tty",NULL"} 

Later I send various commands through the tty by using:
 
  xv_set(tty, TTY_ARGV, my_argv2, NULL);

where my_argv2 is the new command.

This all works fine, but I'd like to be able to know when the command
is finished so I can change a message in the frame's footer.

I'm currently trying to use wait() as I would with exec, but this 
only seems to work once. After that any commands for the tty are
ignored.

ie: xv_set(tty ...) works
    wait()          wait's till it's done
    xv_set(tty ...) doesn't do a thing.

I have tried using signal() after the wait, but that doesn't seem
to do anything at all, and I don't think it should be there 
anyway.

The other thing I'd like is to have a 	scroll bars on the tty
so anything longer than the window can be reviewed/seen.


Any help on these questions would be appreciated, but please
remember I have no docs to reference, especially the O'Rielly
books .	

-Todd