Copyright 1994 University of Stuttgart
This Graph Widget layouts (hierarchical) directed Graphs
This Work is based on the X11R5 tree widget


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a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
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permit persons to whom the Software is furnished to do so, subject to
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The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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IN NO EVENT SHALL THE UNIVERSITY OF STUTTGART OR THE AUTHORS BE LIABLE
FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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$XConsortium: Tree.c,v 1.42 91/02/20 20:06:07 converse Exp $

Copyright 1990 Massachusetts Institute of Technology
Copyright 1989 Prentice Hall

Permission to use, copy, modify, and distribute this software for any
purpose and without fee is hereby granted, provided that the above
copyright notice appear in all copies and that both the copyright notice
and this permission notice appear in supporting documentation.

M.I.T., Prentice Hall and the authors disclaim all warranties with regard
to this software, including all implied warranties of merchantability and
fitness.  In no event shall M.I.T., Prentice Hall or the authors be liable
for any special, indirect or cosequential damages or any damages whatsoever
resulting from loss of use, data or profits, whether in an action of
contract, negligence or other tortious action, arising out of or in
connection with the use or performance of this software.

Authors:  Jim Fulton, MIT X Consortium,
          based on a version by Douglas Young, Prentice Hall

This widget is based on the Tree widget described on pages 397-419 of
Douglas Young's book "The X Window System, Programming and Applications 
with Xt OSF/Motif Edition."  The layout code has been rewritten to use
additional blank space to make the structure of the graph easier to see
as well as to support vertical trees.


Author: Roland Zink
        Universitaet Stuttgart
        IPVR
        Breitwiesenstrasse 20-22
        D 70565 Stuttgart (Germany)
        EMail Roland.Zink@informatik.uni-stuttgart.de
