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<?xml version="1.0" encoding="utf-8"?>
<page xmlns="http://projectmallard.org/1.0/" xmlns:uix="http://projectmallard.org/experimental/ui/" type="topic" id="header-bars" xml:lang="es">

  <info>
    <link type="guide" xref="patterns#primary"/>
    <desc>Elementos que se ejecutan en la parte superior de las ventanas</desc>
    <credit type="author">
      <name>Allan Day</name>
      <email>aday@gnome.org</email>
    </credit>
    <include xmlns="http://www.w3.org/2001/XInclude" href="legal.xml"/>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Alex Puchades</mal:name>
      <mal:email>alex94puchades@gmail.com</mal:email>
      <mal:years>2015</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Daniel Mustieles</mal:name>
      <mal:email>daniel.mustieles@gmail.com</mal:email>
      <mal:years>2011 - 2015</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Nicolás Satragno</mal:name>
      <mal:email>nsatragno@gnome.org</mal:email>
      <mal:years>2013</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Benjamín Valero Espinosa</mal:name>
      <mal:email>benjavalero@gmail.com</mal:email>
      <mal:years>2011</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Jorge González</mal:name>
      <mal:email>jorgegonz@svn.gnome.org</mal:email>
      <mal:years>2009</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Rosa Elena Pérez</mal:name>
      <mal:email>rozydicemiau@gmail.com</mal:email>
      <mal:years>2014</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Oscar Rafael Arachi</mal:name>
      <mal:email>arachi910@gmail.com</mal:email>
      <mal:years>2014 - 2015</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Miguel Ajuech</mal:name>
      <mal:email>miguel.ann.28@gmail.com</mal:email>
      <mal:years>2014</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Adrián Pérez Domínguez</mal:name>
      <mal:email>adrian@aztli.org</mal:email>
      <mal:years>2015</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Celina Osorio Ochoa</mal:name>
      <mal:email>chelinoska@gmail.com</mal:email>
      <mal:years>2015</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Dario Amigon Espinoza</mal:name>
      <mal:email>daramigon@gmail.com</mal:email>
      <mal:years>2015</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Yenisei Ramírez Pérez</mal:name>
      <mal:email>yeniseirape@gmail.com</mal:email>
      <mal:years>2015</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>José Roberto Ramíres Mendoza</mal:name>
      <mal:email>aczella@gmail.com</mal:email>
      <mal:years>2015</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Bernardo Sánchez Romero</mal:name>
      <mal:email>b.sanchez.rom@gmail.com</mal:email>
      <mal:years>2015</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Emmanuel Márquez Juárez</mal:name>
      <mal:email>resident3333@gmail.com</mal:email>
      <mal:years>2015</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>David Romero Serrano</mal:name>
      <mal:email>lemi136@hotmail.com</mal:email>
      <mal:years>2015</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Omar Garcia Guzman</mal:name>
      <mal:email>garciag.omar91@gmail.com</mal:email>
      <mal:years>2015</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Edilberto Huerta Niño</mal:name>
      <mal:email>edilberto.huerta0290@gmail.com</mal:email>
      <mal:years>2015</mal:years>
    </mal:credit>
  </info>

<title>Barras de cabecera</title>

<media type="image" mime="image/svg" src="figures/patterns/header-bar.svg"/>

<p>Las barras de cabecera son un elemento horizontal común que se colocan en la parte superior de la ventana. Estas desempeñan una serie de funciones:</p>

<list>
<item><p>Controles de la ventana: las barras de cabecera permiten mover ventanas arrastrándolas, incluyen botones de control de la ventana (típicamente un solo botón de cierre), y proporciona acceso a un menú de controles de la ventana.</p></item>
<item><p>Encabezado: un papel clave de una barra de cabecera es proporcionar un contexto para el contenido de la ventana, ya sea a través de un conmutador de encabezado o de vista.</p></item>
<item><p>Controles: las barras de cabecera proveen un lugar para los controles clave, típicamente en forma de botones.</p></item>
</list>

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

<p>Header bars are recommended for all application windows. They provide a number of advantages over the traditional combination of title bar, menu bar and toolbar, including a smaller vertical footprint, and dynamic navigation and mode changes (such as with <link xref="selection-mode">selection mode</link>).</p>

<p>Header bars are incompatible with menu bars. If your application already incorporates a menu bar, you should evaluate the alternatives suggested in these guidelines. See the <link xref="menu-bars">menu bar guidelines</link> for more details on this.</p>

</section>

<section id="controls">
<title>Controles</title>

<p>Header bars can contain key controls for the window, which can be placed on the left and right-hand side of the header bar. Examples of these controls include buttons for navigating back and forward, search, and selecting content.</p>

<p>Ensure that your header bar only contains a small number of key controls - this will help users to understand the primary functionality provided by the window, and will ensure that the window can be resized to narrow widths.</p>

<p>If a window requires more controls than can be comfortably accommodated within the header bar, additional functionality can be included within a header bar menu.</p>

</section>

<section id="dynamic">
<title>Las barras de cabecera son dinámicas</title>

<p>A header bar can - and should - update along with view or mode changes. This ensures that header bar controls are always relevant to the current context.</p>

<p>If the window includes multiple views (accessed through a <link xref="view-switchers">view switcher</link>), the header bar can include different controls for each view.</p>

<p>If the window incorporates navigation, different controls can be shown depending on the location displayed in the window itself. It is common to show a back button on the left side of the header bar when navigating.</p>

</section>

<section id="additional-guidance">
<title>Ayuda adicional</title>

<list>
<item><p>A header bar should always provide context for the window it belongs to. This aids window identification, and clarifies what is displayed in the window itself. This can either be done by placing a heading in the center of the header bar, or by including a <link xref="view-switchers">view switcher</link>.</p></item>
<item><p>Arrange controls within the header bar according to the three alignment points described in the <link xref="visual-layout">visual layout guidelines</link> - left, center and right.</p></item>
<item><p>Los botones <gui>Nuevo</gui> y «Atrás» se deben colocar en la parte izquierda de la barra de cabecera.</p></item>
<item><p>Always ensure that there is room for a header bar to be dragged. This is necessary to enable windows to be moved or resized.</p></item>
</list>

</section>

<section id="api-reference">
<title>Referencia de la API</title>

<list>
<item><p><link href="https://developer.gnome.org/gtk3/stable/GtkHeaderBar.html">GtkHeaderBar</link></p></item>
</list>

</section>

</page>