<?xml version="1.0" encoding="utf-8"?>
<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" type="topic" id="tech-gdk" xml:lang="fr">
<info>
<link type="guide" xref="tech" group="gdk"/>
<revision pkgversion="3.0" date="2011-04-05" status="candidate"/>
<credit type="author copyright">
<name>Shaun McCance</name>
<email its:translate="no">shaunm@gnome.org</email>
<years>2011–2012</years>
</credit>
<include xmlns="http://www.w3.org/2001/XInclude" href="cc-by-sa-3-0.xml"/>
<desc>Low-level abstraction for the windowing system</desc>
</info>
<title>GDK</title>
<p>GDK is the low-level library used by <link xref="tech-gtk">GTK+</link> to
interact with the windowing system for graphics and input devices. Although
you will rarely use GDK directly in application code, it contains all the
necessary functionality to create low-level windows in the screen and to
interact with the user with various input devices. GDK acts as an abstraction
over various windowing systems, so that GTK+ can be portable to all of them:
the X Window System (X11), Microsoft Windows, Mac OS X Quartz.</p>
<p>GDK enables you to access events from keyboards, mice, and other
input devices. Implementations of widgets in GTK+ use this functionality, and
translate the events into higher-level signals that can in turn be used from
application code. For example, a <code>GtkButton</code> widget will track
<code>GDK_BUTTON_PRESS</code> and <code>GTK_BUTTON_RELEASE</code> events,
which come from the mouse, and translate them as appropriate into a
<code>GtkButton::clicked</code> signal when the user presses and releases
the button in the right location.</p>
<p>GDK also provides low-level routines to access drag and drop
and clipboard data from the system. When implementing custom controls,
you may need to access these features to implement proper user interaction
behavior.</p>
<p>GDK fournit d'autres fonctionnalités indispensables pour l'implémentation d'une boîte à outils graphique complète telle que GTK+. Comme GDK joue le rôle d'une abstraction de plate-forme, permettant à GTK+ de fonctionner sous plusieurs environnements, il fournit une interface de programmation pour toutes les fonctionnalités du système dont GTK+ a besoin. Cela comprend les informations sur les affichages à plusieurs sorties, la résolution et la profondeur de couleur, les cartes de couleur et les curseurs.</p>
<p>You should use GDK whenever you need low-level access to the underlying
windowing system, including low-level access to events, windows, and the
clipboard. Using GDK for these tasks ensures that your code is portable and
integrates with the rest of your GTK+ code. The simple drawing routines in
GDK should generally not be used; these are a left-over from when GDK simply
wrapped the windowing system's drawing primitives. Instead, you should use
the extensive functionality provided by <link xref="tech-cairo">Cairo</link>
to draw high-quality 2D graphics.</p>
<list style="compact">
<item><p><link href="https://developer.gnome.org/gdk3/stable/">GDK Reference Manual</link></p></item>
</list>
</page>