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BST 2000 Tony Gale 8aeed4867c Change filename. Add Section 3. 
Thu Jun 22 17:43:51 BST 2000  Tony Gale <gale@gtk.org>

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<!doctype book PUBLIC "-//OASIS//DTD DocBook V3.1//EN" []>
<book>
<bookinfo>
<date>June 21st 2000</date>
<title>GTK+ FAQ</title>
<authorgroup>
<author>
<firstname>Tony</firstname>
<surname>Gale</surname>
</author>
<author>
<firstname>Shawn</firstname>
<surname>Amundson</surname>
</author>
<author>
<firstname>Emmanuel</firstname>
<surname>Deloget</surname>
</author>
</authorgroup>
<abstract>
<para> This document is intended to answer questions that are
likely to be frequently asked by programmers using GTK+ or
people who are just looking at using GTK+. </para>
</abstract>
</bookinfo>
<toc></toc>
<!-- ***************************************************************** -->
<chapter>
<title>General Information</title>
<para>Here's a paragraph of text because it is stylistically poor
to start a section right after the chapter title.</para>
<sect1>
<title></title>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>Before anything else: the greetings</title>
<para>The FAQ authors want to thank:</para>
<itemizedlist spacing=Compact>
<listitem>
<simpara>Havoc Pennington</simpara>
</listitem>
<listitem>
<simpara>Erik Mouw</simpara>
</listitem>
<listitem>
<simpara>Owen Taylor</simpara>
</listitem>
<listitem>
<simpara>Tim Janik</simpara>
</listitem>
<listitem>
<simpara>Thomas Mailund Jensen</simpara>
</listitem>
<listitem>
<simpara>Joe Pfeiffer</simpara>
</listitem>
<listitem>
<simpara>Andy Kahn</simpara>
</listitem>
<listitem>
<simpara>Federico Mena Quntero</simpara>
</listitem>
<listitem>
<simpara>Damon Chaplin</simpara>
</listitem>
<listitem>
<simpara>and all the members of the GTK+ lists</simpara>
</listitem></itemizedlist>
<para> If we forgot you, please email us! Thanks again (I know,
it's really short :) </para>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>Authors</title>
<para>The original authors of GTK+ were:</para>
<itemizedlist spacing=Compact>
<listitem>
<simpara>Peter Mattis</simpara>
</listitem>
<listitem>
<simpara>Spencer Kimball</simpara>
</listitem>
<listitem>
<simpara>Josh MacDonald</simpara>
</listitem>
</itemizedlist>
<para>Since then, much has been added by others. Please see the
AUTHORS file in the distribution for the GTK+ Team.</para>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>What is GTK+?</title>
<para>GTK+ is a small and efficient widget set designed with
the general look and feel of Motif. In reality, it looks much
better than Motif. It contains common widgets and some more
complex widgets such as a file selection, and color selection
widgets.</para>
<para>GTK+ provides some unique features. (At least, I know of
no other widget library which provides them). For example, a
button does not contain a label, it contains a child widget,
which in most instances will be a label. However, the child
widget can also be a pixmap, image or any combination possible
the programmer desires. This flexibility is adhered to
throughout the library.</para>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>What is the + in GTK+?</title>
<para>Peter Mattis informed the gtk mailing list that:</para>
<para><quote>I originally wrote gtk which included the three
libraries, libglib, libgdk and libgtk. It featured a flat
widget hierarchy. That is, you couldn't derive a new widget
from an existing one. And it contained a more standard
callback mechanism instead of the signal mechanism now present
in gtk+. The + was added to distinguish between the original
version of gtk and the new version. You can think of it as
being an enhancement to the original gtk that adds object
oriented features.</quote></para>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>Does the G in GTK+, GDK and GLib stand for?</title>
<para>GTK+ == Gimp Toolkit</para>
<para>GDK == GTK+ Drawing Kit</para>
<para>GLib == G Libray</para>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>Where is the documentation for GTK+?</title>
<para>In the GTK+ distribution's doc/ directory you will find
the reference material for both GTK and GDK, this FAQ and the
GTK Tutorial.</para>
<para>In addition, you can find links to HTML versions of
these documents by going to <ulink url="http://www.gtk.org/">
http://www.gtk.org/</ulink>. A
packaged version of the GTK Tutorial, with SGML, HTML,
Postscript, DVI and text versions can be found in <ulink
url="ftp://ftp.gtk.org/pub/gtk/tutorial">ftp://ftp.gtk.org/pub/gtk/tutorial
</ulink></para>
<para>There are now a couple of books available that deal with
programming GTK+, GDK and GNOME:</para>
<itemizedlist>
<listitem><simpara>Eric Harlows book entitled "Developing
Linux Applications with GTK+ and GDK". The ISBN is 0-7357-0021-4</simpara>
</listitem>
<listitem><simpara>The example code from Eric's book is
available on-line at <ulink
url="http://www.bcpl.net/~eharlow/book">
http://www.bcpl.net/~eharlow/book</ulink></simpara>
</listitem>
<listitem><simpara>Havoc Pennington has released a book called
"GTK+/GNOME Application Development". The ISBN is 0-7357-0078-8</simpara>
<simpara>The free version of the book lives here: <ulink
url="http://developer.gnome.org/doc/GGAD/">http://developer.gnome.org/doc/GGAD/
</ulink></simpara>
<simpara>And Havoc maintains information about it and
errata here: <ulink
url="http://pobox.com/~hp/gnome-app-devel.html">http://pobox.com/~hp/gnome-app-devel.html
</ulink></simpara>
</listitem>
</itemizedlist>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>Is there a mailing list (or mailing list archive) for
GTK+?</title>
<para>Information on mailing lists relating to GTK+ can be
found at: <ulink
url="http://www.gtk.org/mailinglists.html">http://www.gtk.org/mailinglists.html
</ulink></para>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>How to get help with GTK+</title>
<para>First, make sure your question isn't answered in the
documentation, this FAQ or the tutorial. Done that? You're
sure you've done that, right? In that case, the best place to
post questions is to the GTK+ mailing list.</para>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>How to report bugs in GTK+</title>
<para>Bugs should be reported to the GNOME bug tracking system
(<ulink
url="http://bugs.gnome.org">http://bugs.gnome.org</ulink>). To
report a problem about GTK+, send mail to submit@bugs.gnome.org.</para>
<para>The subject of the mail should describe your problem. In
the body of the mail, you should first include a
"pseudo-header" that gives the package and version
number. This should be separated by a blank line from the
actual headers.</para>
<para><literallayout><literal>Package: gtk+</literal>
<literal>Version: 1.2.0</literal></literallayout></para>
<para>Substitute 1.2.0 with the version of GTK+ that you have installed.</para>
<para>Then describe the bug. Include:</para>
<itemizedlist>
<listitem><simpara> Information about your system. For instance:</simpara>
<itemizedlist spacing=compact>
<listitem><simpara> What operating system and version</simpara>
</listitem>
<listitem><simpara> What version of X</simpara>
</listitem>
<listitem><simpara> For Linux, what version of the C library</simpara>
</listitem>
</itemizedlist>
<para>And anything else you think is relevant.</para>
</listitem>
<listitem><simpara> How to reproduce the bug.</simpara>
<simpara>If you can reproduce it with the testgtk program
that is built in the gtk/ subdirectory, that will be most
convenient. Otherwise, please include a short test program
that exhibits the behavior. As a last resort, you can also
provide a pointer to a larger piece of software that can
be downloaded.</simpara>
<simpara>(Bugs that can be reproduced within the GIMP are
almost as good as bugs that can be reproduced in
testgtk. If you are reporting a bug found with the GIMP,
please include the version number of the GIMP you are
using)</simpara>
</listitem>
<listitem><simpara> If the bug was a crash, the exact text that was
printed out when the crash occured.</simpara>
</listitem>
<listitem><simpara> Further information such as stack traces
may be useful, but are not necessary. If you do send a stack trace,
and the error is an X error, it will be more useful if the stacktrace is produced running
the test program with the <literal>--sync</literal> command line option.</simpara>
</listitem>
</itemizedlist>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>Is there a Windows version of GTK+?</title>
<para>There is an on going port of GTK+ to the Windows
platform which is making impressive progress.</para>
<para>See <ulink
url="http://www.iki.fi/tml/gimp/win32">http://www.iki.fi/tml/gimp/win32</ulink>
for more information.</para>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>What applications have been written with GTK+?</title>
<para>A list of some GTK+ based application can be found on
the GTK+ web server at <ulink
url="http://www.gtk.org/apps/">http://www.gtk.org/apps/</ulink>
and contains more than 350 applications.</para>
<para>Failing that, look for a project to work on for the
GNOME project, <ulink
url="http://www.gnome.org/">http://www.gnome.org/</ulink>
Write a game. Write something that is useful.</para>
<para>Some of these are:</para>
<itemizedlist>
<listitem><simpara> GIMP (<ulink
url="http://www.gimp.org/">http://www.gimp.org/</ulink>), an
image manipulation program</simpara>
</listitem>
<listitem><simpara> AbiWord (<ulink
url="http://www.abisource.com/">http://www.abisource.com/</ulink>),
a professional word processor</simpara>
</listitem>
<listitem><simpara> Gzilla (<ulink
url="http://www.levien.com/gzilla/">http://www.levien.com/gzilla/</ulink>),
a web browser</simpara>
</listitem>
<listitem><simpara> XQF (<ulink
url="http://www.botik.ru/~roma/quake/">http://www.botik.ru/~roma/quake/</ulink>),
a QuakeWorld/Quake2 server browser and launcher</simpara>
</listitem>
<listitem><simpara> GDK Imlib (<ulink
url="http://www.rasterman.com/imlib.html">http://www.rasterman.com/imlib.html</ulink>),
a fast image loading and manipulation library for GDK</simpara>
</listitem>
<listitem><simpara> Glade (<ulink
url="http://glade.pn.org/">http://glade.pn.org/</ulink>), a
GTK+ based RAD tool which produces GTK+ applications</simpara>
</listitem>
</itemizedlist>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>I'm looking for an application to write in GTK+. How
about an IRC client?</title>
<para>Ask on gtk-list for suggestions. There are at least
three IRC clients already under development (probably more in fact. The server at
<ulink url="http://www.forcix.cx/irc-clients.html">
http://www.forcix.cx/irc-clients.html</ulink> list a bunch of them).</para>
<itemizedlist spacing=compact>
<listitem><simpara> X-Chat.</simpara>
</listitem>
<listitem><simpara> girc. (Included with GNOME)</simpara>
</listitem>
<listitem><simpara> gsirc. (In the gnome CVS tree)</simpara>
</listitem>
</itemizedlist>
</sect2>
</sect1>
</chapter>
<!-- ***************************************************************** -->
<chapter>
<title>How to find, configure, install, and troubleshoot GTK+</title>
<sect1>
<title></title>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>What do I need to run GTK+?</title>
<para>To compile GTK+, all you need is a C compiler (gcc) and
the X Window System and associated libraries on your system.</para>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>Where can I get GTK+?</title>
<para>The canonical site is <ulink
url="ftp://ftp.gtk.org/pub/gtk">ftp://ftp.gtk.org/pub/gtk</ulink>.</para>
<para>This site tends to get busy around the time of a new
GTK+ release so try and use one of the mirror sites that are
listed in <ulink
url="ftp://ftp.gtk.org/etc/mirrors">ftp://ftp.gtk.org/etc/mirrors</ulink></para>
<para>Here's a few mirror sites to get you started:</para>
<itemizedlist spacing=compact>
<listitem><simpara> Africa - ftp://ftp.is.co.za/applications/gimp/</simpara>
</listitem>
<listitem><simpara> Australia - ftp://ftp.au.gimp.org/pub/gimp/</simpara>
</listitem>
<listitem><simpara> Finland - ftp://ftp.funet.fi/pub/sci/graphics/packages/gimp</simpara>
</listitem>
<listitem><simpara> Germany - ftp://infosoc.uni-koeln.de/pub/ftp.gimp.org/</simpara>
</listitem>
<listitem><simpara> Japan - ftp://SunSITE.sut.ac.jp/pub/archives/packages/gimp/</simpara>
</listitem>
<listitem><simpara> UK - ftp://ftp.flirble.org/pub/X/gimp/</simpara>
</listitem>
<listitem><simpara> US - ftp://ftp.insync.net/pub/mirrors/ftp.gimp.org/</simpara>
</listitem>
</itemizedlist>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>How do I configure/compile GTK+?</title>
<para>Generally, all you will need to do is issue the commands:</para>
<para><literallayout><literal>./configure</literal>
<literal>make</literal></literallayout></para>
<para>in the gtk+-version/ directory.</para>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>When compiling GTK+ I get an error like: <literal>make:
file `Makefile' line 456: Syntax error</literal></title>
<para>Make sure that you are using GNU make (use <literal>make
-v</literal>
to check). There are many weird and wonderful versions of make
out there, and not all of them handle the automatically
generated Makefiles.</para>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>I've compiled and installed GTK+, but I can't get any
programs to link with it!</title>
<para>This problem is most often encountered when the GTK+
libraries can't be found or are the wrong version. Generally,
the compiler will complain about an 'unresolved symbol'.
There are two things you need to check:</para>
<itemizedlist>
<listitem><simpara>Make sure that the libraries can be
found. You want to edit <filename>/etc/ld.so.conf</filename> to
include the directories which contain the GTK libraries,
so it looks something like:</simpara>
<para><literallayout><literal>/usr/X11R6/lib</literal>
<literal>/usr/local/lib</literal></literallayout></para>
<para>Then you need to run /sbin/ldconfig as root. You can
find what directory GTK is in using</para>
<para><literallayout><literal>gtk-config --libs</literal>
</literallayout></para>
<para>If your system doesn't use ld.so to find libraries
(such as Solaris), then you will have to use the LD_LIBRARY_PATH
environment variable (or compile the path into your program, which I'm
not going to cover here). So, with a Bourne type shell you can do (if
your GTK libraries are in /usr/local/lib):</para>
<para><literallayout><literal>export LD_LIBRARY_PATH=/usr/local/lib</literal></literallayout></para>
<para>and in a csh, you can do:</para>
<para><literallayout><literal>setenv LD_LIBRARY_PATH /usr/local/lib</literal></literallayout></para>
</listitem>
<listitem><simpara>Make sure the linker is finding the
correct set of libraries. If you have a Linux distribution that
installs GTK+ (e.g. RedHat 5.0) then this older version may be
used. Now (assuming you have a RedHat system), issue the
command</simpara>
<para><literallayout><literal>rpm -e gtk gtk-devel</literal></literallayout></para>
<para>You may also want to remove the packages that depend
on gtk (rpm will tell you which ones they are). If you don't have a RedHat Linux system, check to make sure
that neither <filename>/usr/lib</filename> or <filename>/usr/local/lib</filename> contain any of
the libraries libgtk, libgdk, libglib, or libgck. If they do exist, remove them
(and any gtk include files, such as <filename>/usr/include/gtk</filename> and <filename>/usr/include/gdk</filename>)
and reinstall gtk+.</para>
</listitem>
</itemizedlist>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>When compiling programs with GTK+, I get compiler error
messages about not being able to find
<literal>glibconfig.h</literal>.</title>
<para>The header file "glibconfig.h" was moved to the
directory $exec_prefix/lib/glib/include/. $exec_prefix is the
directory that was specified by giving the --exec-prefix flags
to ./configure when compiling GTK+. It defaults to $prefix,
(specified with --prefix), which in turn defaults to /usr/local/.</para>
<para>This was done because "glibconfig.h" includes
architecture dependent information, and the rest of the
include files are put in $prefix/include, which can be shared
between different architectures.</para>
<para>GTK+ includes a shell script, <literal>/gtk-config/</literal>, that makes it
easy to find out the correct include paths. The GTK+ Tutorial
includes an example of using <literal>/gtk-config/</literal> for simple
compilation from the command line. For information about more
complicated configuration, see the file docs/gtk-config.txt in
the GTK+ distribution.</para>
<para>If you are trying to compile an old program, you may be
able to work around the problem by configuring it with a
command line like:</para>
<para><literallayout><literal>setenv CPPFLAGS "-I/usr/local/include/glib/include"</literal>
<literal>./configure</literal></literallayout></para>
<para>(Substitute the appropriate value of $exec_prefix for
/usr/local.)</para>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>When installing a GTK+ application, configure reports
that it can't find GTK.</title>
<para>There are several common reasons for this:</para>
<itemizedlist>
<listitem><simpara>You have an old version of GTK installed
somewhere. RedHat 5.0, for example, installs an older copy of GTK that
may not work with the latest applications. You should remove this old
copy, but note that in the case of RedHat 5.0 this will
break the <literal>control-panel</literal> applications.</simpara>
</listitem>
<listitem><simpara><literal>gtk-config</literal> (or another
component of GTK) isn't in your path, or there is an old
version on your system. Type:</simpara>
<para><literallayout><literal>gtk-config --version</literal></literallayout></para>
<para>to check for both of these. If it returns a value
different from what you expect, then you have an old
version of GTK on your system.</para>
</listitem>
<listitem><simpara>The ./configure script can't find the GTK
libraries. As ./configure compiles various test programs, it needs to
be able to find the GTK libraries. See the question above
for help on this. </simpara></listitem>
</itemizedlist>
<para>If none of the above help, then have a look in
config.log, which is generated by ./configure as it runs. At the
bottom will be the last action it took before failing. If it is a
section of source code, copy the source code to a file and compile it
with the line just above it in config.log. If the compilation is
successful, try executing it.</para>
</sect2>
</sect1>
</chapter>
<!-- ***************************************************************** -->
<chapter>
<title>Development of GTK+</title>
<sect1>
<title></title>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>Whats this CVS thing that everyone keeps talking about,
and how do I access it?</title>
<para>CVS is the Concurent Version System and is a very
popular means of version control for software projects. It is
designed to allow multiple authors to be able to
simultanously operate on the same source tree. This source
tree is centrally maintained, but each developer has a local
mirror of this repository that they make there changes to.</para>
<para>The GTK+ developers use a CVS repository to store the
master copy of the current development version of GTK+. As
such, people wishing to contribute patches to GTK+ should
generate them against the CVS version. Normal people should
use the packaged releases.</para>
<para>The CVS toolset is available as RPM packages from the
usual RedHat sites. The latest version is available at <ulink
url="http://download.cyclic.com/pub/">http://download.cyclic.com/pub/
</ulink></para>
<para>Anyone can download the latest CVS version of GTK+ by
using anonymous access using the following steps:</para>
<itemizedlist>
<listitem><simpara> In a bourne shell descendant (e.g. bash) type:</simpara>
<para><literallayout><literal>CVSROOT=':pserver:anonymous@anoncvs.gnome.org:/cvs/gnome'</literal>
<literal>export CVSROOT</literal></literallayout></para>
</listitem>
<listitem><simpara>Next, the first time the source tree is
checked out, a cvs login is needed. </simpara>
<para><literallayout><literal>cvs login</literal></literallayout></para>
<para>This will ask you for a password. There is no
password for cvs.gimp.org, so just enter a carriage return.</para>
</listitem>
<listitem><simpara>To get the tree and place it in a subdir of your
current working directory, issue the command:</simpara>
<para><literallayout><literal>cvs -z3 get gtk+</literal></literallayout></para>
<para>Note that with the GTK+ 1.1 tree, glib has been moved to
a separate CVS module, so if you don't have glib installed you will
need to get that as well:</para>
<para><literallayout><literal>cvs -z3 get glib</literal></literallayout></para>
</listitem>
</itemizedlist>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>How can I contribute to GTK+?</title>
<para>It's simple. If something doesn't work like you think it
should in a program, check the documentation to make sure
you're not missing something. If it is a true bug or missing
feature, track it down in the GTK+ source, change it, and
then generate a patch in the form of a 'context diff'. This
can be done using a command such as <literal>diff -ru
&lt;oldfile&gt; &lt;newfile&gt;.</literal> Then upload the patchfile to:</para>
<para><literallayout><literal>ftp://ftp.gtk.org/incoming</literal></literallayout></para>
<para>along with a README file. Make sure you follow the
naming conventions or your patch will just be deleted! The
filenames should be of this form:</para>
<para><literallayout><literal>gtk&lt;username&gt;-&lt;date yymmdd-n&gt;.patch.gz</literal>
<literal>gtk-&lt;username&gt;-&lt;date yymmdd-n&gt;.patch.README</literal></literallayout></para>
<para>The "n" in the date indicates a unique number (starting
from 0) of patches you uploaded that day. It should be 0,
unless you upload more than one patch in the same day.</para>
<para>Example:</para>
<para><literallayout><literal>gtk-gale-982701-0.patch.gz</literal>
<literal>gtk-gale-982701-0.patch.README</literal></literallayout></para>
<para>Once you upload <emphasis>anything</emphasis>, send the README to ftp-admin@gtk.org</para>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>How do I know if my patch got applied, and if not, why
not?</title>
<para>Uploaded patches will be moved to
<filename>ftp://ftp.gtk.org/pub/gtk/patches</filename> where one of the
GTK+ development team will pick them up. If applied, they will
be moved to <filename>/pub/gtk/patches/old</filename>.</para>
<para>Patches that aren't applied, for whatever reason, are
moved to <filename>/pub/gtk/patches/unapplied</filename> or
<filename>/pub/gtk/patches/outdated</filename>. At this point you can ask
on the <literal>gtk-list</literal> mailing list why your patch wasn't
applied. There are many possible reasons why patches may not
be applied, ranging from it doesn't apply cleanly, to it isn't
right. Don't be put off if your patch didn't make it first
time round.</para>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>What is the policy on incorporating new widgets into
the library?</title>
<para>This is up to the authors, so you will have to ask them
once you are done with your widget. As a general guideline,
widgets that are generally useful, work, and are not a
disgrace to the widget set will gladly be included.</para>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>Is anyone working on bindings for languages other than
C?</title>
<para>The GTK+ home page (<ulink
url="http://www.gtk.org/">http://www.gtk.org/</ulink>)
presents a list of GTK+ bindings.</para>
<itemizedlist>
<listitem><simpara>There are several C++ wrappers for GTK+.</simpara>
<itemizedlist>
<listitem><simpara>the gtk-- package, which is a very small wrapper for GTK+.
You can find the home page at <ulink
url="http://www.cs.tut.fi/~p150650/gtk/gtk--.html">
http://www.cs.tut.fi/~p150650/gtk/gtk--.html</ulink>. The FTP site is
<ulink url="ftp://ftp.gtk.org/pub/gtk/gtk--">
ftp://ftp.gtk.org/pub/gtk/gtk--</ulink>.</simpara>
</listitem>
<listitem><simpara>the VDK package, which was built as
the base package of a GTK+ application Borland-like
builder. The home page can be found at <ulink
url="http://www.guest.net/homepages/mmotta/VDKHome">
http://www.guest.net/homepages/mmotta/VDKHome</ulink>.</simpara>
</listitem>
<listitem><simpara>The wxWindows/Gtk package, a free C++ library for cross-platform
GUI development. The home page of this package is
<ulink url="http://www.freiburg.linux.de/~wxxt/">
http://www.freiburg.linux.de/~wxxt/</ulink>.</simpara>
</listitem>
</itemizedlist>
</listitem>
<listitem><simpara>There are three known Objective-c
bindings currently in development:</simpara>
<itemizedlist>
<listitem><simpara>The <ulink
url="http://www.gnome.org/">http://www.gnome.org/</ulink>
package of choice is objgtk. Objgtk is based on the Object class and is maintained by
<ulink url="mailto:sopwith@cuc.edu">Elliot Lee</ulink>. Apparently,
objgtk is being accepted as the `standard' Objective-C binding for GTK+.</simpara>
</listitem>
<listitem><simpara>If you are more inclined towards the
<ulink url="http://www.gnustep.org/">GNUstep project</ulink>,
you may want to check out GTKKit by
<ulink url="mailto:helge@mdlink.de">Helge He&szlig;</ulink>.
The intention is to setup a GTK+ binding using the FoundationKit.
GTKKit includes nicities like writing a XML-type template file to
construct a GTK+ interface.</simpara>
</listitem>
<listitem><simpara>The GToolKit package, which can be found at
<ulink url="ftp://ftp.gtk.org/pub/gtk/objc-gtoolkit/">
ftp://ftp.gtk.org/pub/gtk/objc-gtoolkit/</ulink>.</simpara>
</listitem>
</itemizedlist>
</listitem>
<listitem><simpara>Perl bindings <ulink
url="ftp://ftp.gtk.org/pub/gtk/perl">ftp://ftp.gtk.org/pub/gtk/perl</ulink></simpara>
</listitem>
<listitem><simpara>Guile bindings. The home page is at
<ulink url="http://www.ping.de/sites/zagadka/guile-gtk">http://www.ping.de/sites/zagadka/guile-gtk</ulink>.
By the way, Guile is the GNU Project's implemention of R4RS Scheme (the
standard). If you like Scheme, you may want to take a look at this.</simpara>
</listitem>
<listitem><simpara>David Monniaux reports:
<quote>I've started a gtk-O'Caml binding system.
The basics of the system, including callbacks, work fine.
The current development is in
<ulink url="http://www.ens-lyon.fr/~dmonniau/arcs">http://www.ens-lyon.fr/~dmonniau/arcs</ulink>
</quote></simpara>
</listitem>
<listitem><simpara>Several python bindings have been done:</simpara>
<itemizedlist>
<listitem><simpara>pygtk is at
<ulink url="http://www.daa.com.au/~james/pygtk">http://www.daa.com.au/~james/pygtk</ulink> and
<ulink url="ftp://ftp.gtk.org/pub/gtk/python">ftp://ftp.gtk.org/pub/gtk/python</ulink></simpara>
</listitem>
<listitem><simpara>python-gtk is at
<ulink url="http://www.ucalgary.ca/~nascheme/python-gtk">http://www.ucalgary.ca/~nascheme/python-gtk</ulink></simpara>
</listitem>
</itemizedlist>
</listitem>
<listitem><simpara>There's are a couple of OpenGL/Mesa
widgets available for GTK+. I suggest you start at
<ulink url="http://www.student.oulu.fi/~jlof/gtkglarea/index.html">http://www.student.oulu.fi/~jlof/gtkglarea/index.html</ulink></simpara>
</listitem>
<listitem><simpara>Last, there are a lot of other language
bindings for languages such as Eiffel, TOM, Pascal, Pike, etc.</simpara>
</listitem>
</itemizedlist>
</sect2>
</sect1>
</chapter>
<!-- ----------------------------------------------------------------- -->
</book>
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