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    <link type="guide" xref="patterns" group="view-switchers"/>
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  </info>

<title>View switchers</title>

<media type="image" mime="image/svg" src="figures/patterns/view-switcher.svg"/>

<p>A view switcher is a control that allows switching between a number of predefined views. It appears as a set of toggle buttons that are placed in the center of a header bar.</p>

<section id="when-to-use">
<title>Cuándo usarlas</title>

<p>There are two primary cases when a view switcher is appropriate:</p>

<list>
<item><p>When presenting content, and it is useful to be able to view different sets or sub-sets of content. For example, a music application could show different views for artists, albums and playlists.</p></item>
<item><p>If your application provides discrete groups of functionality which are typically used independently.</p></item>
</list>

<p>As a rule of thumb, a view switcher should contain between three and five views. If you have more views, a <link xref="sidebar-lists">sidebar list</link> might be a more appropriate view switching control.</p>

</section>

<section id="additional-guidelines">
<title>Guías adicionales</title>

<list>
<item><p>Cada vista debe tener un título corto y claro.</p></item>
<item><p>Buttons in the view switcher widget can indicate when there is activity in a view.</p></item>
</list>

</section>
</page>
