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<div class="part" lang="en">
<div class="titlepage"><div><div><h1 class="title">
<a name="gtk"></a>Part I. GTK+ Overview</h1></div></div></div>
<div class="partintro" lang="en">
<div></div>
<p>
GTK+ is a library for creating graphical user interfaces. It
works on many UNIX-like platforms, Windows, and on framebuffer
devices. GTK+ is released under the GNU Library General Public License
(GNU LGPL), which allows for flexible licensing of client
applications. GTK+ has a C-based object-oriented architecture that
allows for maximum flexibility. Bindings for other languages have
been written, including C++, Objective-C, Guile/Scheme, Perl, Python,
TOM, Ada95, Free Pascal, and Eiffel.
</p>
<p>
GTK+ depends on the following libraries:
</p>
<div class="variablelist"><table border="0">
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<td>
<span class="term">GLib</span></td>
<td><p>
A general-purpose utility library, not specific to graphical user interfaces.
GLib provides many useful data types, macros, type conversions,
string utilities, file utilities, a main loop abstraction, and so on.
</p></td>
</tr>
<tr>
<td>
<span class="term">Pango</span></td>
<td><p>
Pango is a library for internationalized text handling. It centers
around the <a
href="../pango/pango-Layout-Objects.html#PangoLayout"
>PangoLayout</a> object, representing
a paragraph of text.
Pango provides the engine for <a href="GtkTextView.html" title="GtkTextView">GtkTextView</a>,
<a href="GtkLabel.html" title="GtkLabel">GtkLabel</a>,
<a href="GtkEntry.html" title="GtkEntry">GtkEntry</a>, and
other widgets that display text.
</p></td>
</tr>
<tr>
<td>
<span class="term">ATK</span></td>
<td><p>
ATK is the Accessibility Toolkit. It provides a set of generic
interfaces allowing accessibility technologies to interact with a
graphical user interface. For example, a screen reader uses ATK to
discover the text in an interface and read it to blind users. GTK+
widgets have built-in support for accessibility using the ATK
framework.
</p></td>
</tr>
<tr>
<td>
<span class="term">GdkPixbuf</span></td>
<td><p>
This is a small library which allows you to create <a
href="../gdk-pixbuf/gdk-pixbuf-gdk-pixbuf.html#GdkPixbuf"
>GdkPixbuf</a>
("pixel buffer") objects from image data or image files.
Use a <a
href="../gdk-pixbuf/gdk-pixbuf-gdk-pixbuf.html#GdkPixbuf"
>GdkPixbuf</a> in combination with <a href="GtkImage.html" title="GtkImage">GtkImage</a> to display images.
</p></td>
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<td>
<span class="term">GDK</span></td>
<td><p>
GDK is the abstraction layer that allows GTK+ to support multiple
windowing systems. GDK provides drawing and window system facilities
on X11, Windows, and the Linux framebuffer device.
</p></td>
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<td>
<span class="term">GTK+</span></td>
<td><p>
The GTK+ library itself contains <em class="firstterm">widgets</em>,
that is, GUI components such as <a href="GtkButton.html" title="GtkButton">GtkButton</a> or
<a href="GtkTextView.html" title="GtkTextView">GtkTextView</a>.
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