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<li class="toctree-l3"><a class="reference internal" href="accessibility/coding-guidelines.html">Coding Guidelines for Supporting Accessibility</a></li>
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<li class="toctree-l3"><a class="reference internal" href="accessibility/custom-widgets.html">Making Custom Components Accessible</a></li>
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<section id="accessibility">
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<h1>Accessibility<a class="headerlink" href="#accessibility" title="Permalink to this headline">#</a></h1>
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<p>Accessibility means helping people with disabilities to participate in
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substantial life activities. That includes work, and the use of services,
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products, and information. GNOME includes libraries and a support framework
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that allow people with disabilities to utilize all of the functionality of the
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GNOME user environment.</p>
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<p>In conjunction with assistive technologies if necessary - voice interfaces,
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screen readers, alternate input devices, and so on - people with permanent or
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temporary disabilities can therefore use the GNOME desktop and applications.
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Assistive technologies are also useful for people using computers outside their
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home or office. For example, if you’re stuck in traffic, you might use voice
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input and output to check your email.</p>
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<p>Assistive technologies receive information from applications via the AT-SPI
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D-Bus protocol, which you can find in the <a class="reference external" href="https://gitlab.gnome.org/GNOME/at-spi2-core/">at-spi2-core</a> repository. GTK implements the
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AT-SPI protocol for its own widgets, and exposes the <a class="reference external" href="https://docs.gtk.org/gtk4/iface.Accessible.html">GtkAccessible API</a> to
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application developers. Because support for the accessibility API is built into
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the GTK toolkit, your GNOME program should function reasonably well with
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assistive technologies with no extra work on your part. For example, assistive
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technologies can automatically read the widget labels that you would normally
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set in your program anyway (e.g. with GTK function calls such as
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<code class="docutils literal notranslate"><span class="pre">gtk_label_set_text()</span></code> or <code class="docutils literal notranslate"><span class="pre">gtk_button_new_with_label()</span></code>). They can also
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find out if there is any tooltip text associated with a widget, and use that to
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describe the widget to the user.</p>
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<p>With a little extra effort, however, you can make your program function even
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||
more smoothly with assistive technologies. Besides helping individual users,
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this will also make your product more attractive to government and education
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||
markets, many of which now require their applications to be accessible by law.</p>
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<section id="types-of-disabilities">
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<h2>Types of disabilities<a class="headerlink" href="#types-of-disabilities" title="Permalink to this headline">#</a></h2>
|
||
<p>Disabilities fall into one of these categories:</p>
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<dl class="simple">
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<dt>visual impairments</dt><dd><p>these can range from low-vision (including dim or hazy vision, extreme far- or
|
||
near-sightedness, color-blindness, and tunnel vision, amongst others) to
|
||
complete blindness. Poor choice of text size and color, and tasks that involve
|
||
good hand-eye coordination (such as moving the mouse) can cause problems for
|
||
these users.</p>
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</dd>
|
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<dt>movement impairments</dt><dd><p>users with poor muscle control or weaknesses can find it hard to use a
|
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standard keyboard or mouse. For example, they may be unable to hold down two
|
||
keys simultaneously, or they may be more likely to strike keys accidentally.</p>
|
||
</dd>
|
||
<dt>hearing impairments</dt><dd><p>these can range from being able to hear some sounds but not distinguish spoken
|
||
words, to profound deafness. Applications that convey important information by
|
||
sound alone will cause problems for these users.</p>
|
||
</dd>
|
||
<dt>cognitive and language impairments</dt><dd><p>these can range from dyslexia to difficulties remembering things, solving
|
||
problems or comprehending and using spoken or written language. Complex or
|
||
inconsistent displays, or poor choice of words can make using computers
|
||
difficult for these users.</p>
|
||
</dd>
|
||
<dt>seizure disorders</dt><dd><p>certain light or sound patterns can cause epileptic seizures in some
|
||
susceptible users.</p>
|
||
</dd>
|
||
</dl>
|
||
</section>
|
||
<section id="content-overview">
|
||
<h2>Content overview<a class="headerlink" href="#content-overview" title="Permalink to this headline">#</a></h2>
|
||
<ul class="simple">
|
||
<li><p>The <a class="reference external" href="https://developer.gnome.org/hig/">GNOME Human Interface Guidelines</a>
|
||
contain a section on how to design your application so that it is accessible
|
||
right from the start.</p></li>
|
||
<li><p><a class="reference internal" href="accessibility/coding-guidelines.html"><span class="doc">Improving your UI’s accessibility</span></a></p></li>
|
||
<li><p><a class="reference internal" href="accessibility/custom-widgets.html"><span class="doc">Making custom UI elements accessible</span></a></p></li>
|
||
<li><p><a class="reference external" href="https://docs.gtk.org/gtk4/section-accessibility.html">GTK Accessibility guidelines</a></p></li>
|
||
</ul>
|
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<ul>
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<li><a class="reference internal" href="#">Accessibility</a><ul>
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<li><a class="reference internal" href="#types-of-disabilities">Types of disabilities</a></li>
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<li><a class="reference internal" href="#content-overview">Content overview</a></li>
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