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<section id="notifications">
<h1>Notifications<a class="headerlink" href="#notifications" title="Permalink to this headline"></a></h1>
<img alt="../../_images/notification.png" src="../../_images/notification.png"/>
<p>Notifications are used to inform users about events that are relevant to them. Examples include:</p>
<ul class="simple">
<li><p>when a download or other long-running operation has finished</p></li>
<li><p>when new content is available</p></li>
<li><p>when a message has been received</p></li>
</ul>
<p>Because they are shown by the system, notifications are a useful way of communicating with users while they are using other applications. If a message is only relevant while the sender app is being used, <a class="reference internal" href="toasts.html"><span class="doc">toasts</span></a> are a better option.</p>
<section id="general-guidelines">
<h2>General Guidelines<a class="headerlink" href="#general-guidelines" title="Permalink to this headline"></a></h2>
<ul class="simple">
<li><p>Be careful not to needlessly distract users with notifications, and question whether users really need to be informed about the events you want to communicate.</p></li>
<li><dl class="simple">
<dt>Applications that deal with lots of events, such as email or social media messages, run a particular risk of distracting users with too many notifications. In these situations:</dt><dd><ul>
<li><p>It is often desirable to place restrictions on how frequently notifications are shown. For example, instead of showing a notification for each new message, periodic notifications can show a summary of messages that have been received.</p></li>
<li><p>Provide an option for users to disable and/or reduce the number of notifications.</p></li>
</ul>
</dd>
</dl>
</li>
<li><p>Ensure that your app removes notifications that are no longer valid. For example, a notification for a weather warning that has been revoked, or for emails that have been read.</p></li>
<li><p>Dont rely solely on notifications for communicating something, as they might not always be seen. The application window should independently communicate all the information contained in notifications.</p></li>
</ul>
</section>
<section id="notification-elements">
<h2>Notification Elements<a class="headerlink" href="#notification-elements" title="Permalink to this headline"></a></h2>
<p>Notifications in GNOME have a number of standard elements:</p>
<div class="table-wrapper"><table class="colwidths-given docutils align-default">
<colgroup>
<col style="width: 20%"/>
<col style="width: 80%"/>
</colgroup>
<thead>
<tr class="row-odd"><th class="head"><p>Element</p></th>
<th class="head"><p>Description</p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p>Application Icon</p></td>
<td><p>Indicates which application sent the notification.</p></td>
</tr>
<tr class="row-odd"><td><p>Title</p></td>
<td><p>A short and concise summary of the event that triggered the notification, written in <a class="reference internal" href="../../guidelines/writing-style.html#header-capitalization"><span class="std std-ref">header capitalization</span></a>. The notification should be understandable from the title alone.</p></td>
</tr>
<tr class="row-even"><td><p>Body</p></td>
<td><p>An optional sentence which gives extra detail about the notification, written in <a class="reference internal" href="../../guidelines/writing-style.html#sentence-capitalization"><span class="std std-ref">sentence capitalization</span></a>.</p></td>
</tr>
<tr class="row-odd"><td><p>Default Action</p></td>
<td><p>The action that is triggered when the notification body is clicked. This should dismiss the notification and show the relevant part of the source app window.</p></td>
</tr>
<tr class="row-even"><td><p>Actions</p></td>
<td><p>Each notification can include up to three buttons.</p></td>
</tr>
</tbody>
</table></div>
</section>
<section id="notification-actions">
<h2>Notification Actions<a class="headerlink" href="#notification-actions" title="Permalink to this headline"></a></h2>
<p>It is possible to add buttons to notifications, to allow users to quickly respond to them. Guidelines for these:</p>
<ul class="simple">
<li><p>Only use notification actions when the functionality that they provide is often required.</p></li>
<li><p>Notification actions should be related to the content of the notification.</p></li>
<li><p>Actions should not replace user interface controls elsewhere — it should be possible to take the same actions from your applications windows.</p></li>
<li><p>Notification actions should not duplicate the default action. For example, a new email notification does not need to include an Open button, since the default action should already perform this action.</p></li>
</ul>
</section>
<section id="api-reference">
<h2>API Reference<a class="headerlink" href="#api-reference" title="Permalink to this headline"></a></h2>
<ul class="simple">
<li><p><a class="reference external" href="https://developer.gnome.org/gio/stable/GNotification.html">GIO: GNotification</a></p></li>
</ul>
</section>
</section>
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<ul>
<li><a class="reference internal" href="#">Notifications</a><ul>
<li><a class="reference internal" href="#general-guidelines">General Guidelines</a></li>
<li><a class="reference internal" href="#notification-elements">Notification Elements</a></li>
<li><a class="reference internal" href="#notification-actions">Notification Actions</a></li>
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