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<H2><A NAME="SECTION000110000000000000000">
1.1 Introduction</A>
</H2>
For many platforms, graphical applications are developed based on an
application framework that is provided by the platform. For Java we have
Swing (and AWT); for Windows we have MFC (and a number of others). In
general, these frameworks include a set of widgets that are used
natively.
<P>
James Henstridge's
<em class="citetitle"><a
href="http://www.pygtk.org/"
title="PyGTK"
>PyGTK</a></em>, an excellent
set of <em class="citetitle"><a
href="http://www.gtk.org/"
title="GTK+"
>GTK+</a></em> bindings for
<em class="citetitle"><a
href="http://www.python.org/"
title="Python"
>Python</a></em>, supports graphical programs
written in Python, but it offers only a set of widgets, not a framework;
you have to do all the work of organizing your application yourself.
<B>Kiwi wraps PyGTK to offer both a framework to organize your
application, and a set of enhanced widgets</B> that can be used either from
the framework or directly in your application. You can use as much or as
little of it as you like.
<P>
A framework (in the object-oriented programming sense) is a set of
general purpose classes that work together to provide a base upon which
an application is built. Kiwi is a white-box framework; to use this type
of framework, you inherit and customize one or more classes, instantiate
them, and run it. In Kiwi, a high-level class that controls a window,
for instance, is called <tt class="class">BaseView</tt>, and it provides a method
called <tt class="function">show_and_loop()</tt> that renders it and starts the event
processing upon which all GTK+ (and therefore Kiwi) applications are
based. The Kiwi framework includes a number of classes that can be
adapted to your specific needs, and they are described further in the
next section.
<P>
Kiwi is based on the real-world experience of using Python and GTK+
(through PyGTK) to develop a fairly large application,
<em class="citetitle"><a
href="http://www.stoq.com.br/"
title="Stoq"
>Stoq</a></em>, which uses many concepts
common to most graphical applications: multiple windows and dialogs,
forms, data persistence, lists and high-level classes that support
domain objects directly.
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<span class="release-info">Release 1.9.22, documentation updated on August, 2006.</span>
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