[guppi-list] a guppi-based app

[Daniel Kottow <dk17 inf tu-dresden de>]

hi all.

i have actually build something which uses guppi. its called
cluster-senses and is supposed to allow interactive examination of
cluster models, specially finite mixture models. go
http://www.inf.tu-dresden.de/~dk17/cluster-senses to find out more. i
definitely am happy to have used guppi for this. some comments,
questions and possible bug reports follow:

1a) when building a barchart object (guppi-object-barchart) the font
type is not considered on the categorical axis.
1b) it is not possible to use "" as a categorical axis label

2) i had trouble using guppi_seq_scalar_append_repeating, crashes
ocurred...

3) in my app i destroy some guppi-object-xxx and build new ones,
including widgets. by that, the parent window gets confused with the key
handling, as if it still were connected to the destroyed objects. you
can try this out easily if you load two cluster definition files in
cluster-senses and then press a key over a histogram window. (seems like
i really would appreciate someone trying cluster-senses..)

4) i had problems using the autoconf example which is on the CVS server
under guppi3. AC_PROC_LIBTOOL was somehow unknown by autoconf and i
ended up copying a whole section of LIBTOOL stuff from configure.in in
guppi.

i will start talking rather freely now...
all the plug-in thing gave me pretty much complications. once i started
linking directly against the plug-ins, everything got easier, since i
could just call the "member" functions. 
consider also that it is virtually not possible now to write new
plug-ins and try them with guppi installed, unless you compile them into
the guppi plug-in dir...hackhack
at the beginning i started with libguppitank, but of course it was to
limited. i think there is missing some intermediate level between the
plug-ins, which are very very modular (so i always kept avoiding their
proper initialization) and the tank. 
some comments also on performance. for manipulating guppi-data objects i
used guppi_seq_scalar_raw(). this improved the performance like a 1000%
over the element access guppi_seq_scalar_get(). strangely, when working
with integers i did not notice such.
finally i have a question concerning the plug-in libraries. currently i
am hard wiring the PLUG_IN_DIR (of an installed guppi) in my configure.
can you think of an easy way to circumvent that? (i am really no
configure freak) or are you going to change things soon in that
direction?

greetings from the east.
dk