gnome-devel-docs 3.28.0-1 / usr / share / help / C / gnome-devel-demos / toolbar.py.page

<?xml version='1.0' encoding='UTF-8'?>
<page xmlns="http://projectmallard.org/1.0/"
      xmlns:its="http://www.w3.org/2005/11/its"
      xmlns:xi="http://www.w3.org/2001/XInclude"
      type="guide" style="task"
      id="toolbar.py">
  <info>
    <title type="text">Toolbar (Python)</title>
    <link type="guide" xref="beginner.py#menu-combo-toolbar"/>
    <link type="seealso" xref="grid.py"/>
    <link type="next" xref="tooltip.py"/>
    <revision version="0.1" date="2012-06-05" status="draft"/>

    <credit type="author copyright">
      <name>Marta Maria Casetti</name>
      <email its:translate="no">mmcasetti@gmail.com</email>
      <years>2012</years>
    </credit>

    <desc>A bar of buttons and other widgets</desc>
  </info>

  <title>Toolbar</title>

  <media type="image" mime="image/png" src="media/toolbar.png"/>
  <p>An example of toolbar with buttons (from stock icons).</p>

  <links type="section" />

  <section id="code">
    <title>Code used to generate this example</title>

    <code mime="text/x-python" style="numbered"><xi:include href="samples/toolbar.py" parse="text"><xi:fallback/></xi:include></code>
  </section>

  <section id="methods">
    <title>Useful methods for a Toolbar widget</title>
    <p>In line 32 the signal <code>"activate"</code> from the action <code>undo_action</code> is connected to the callback function <code>undo_callback()</code> using <code><var>action</var>.connect(<var>signal</var>, <var>callback function</var>)</code>. See <link xref="signals-callbacks.py"/> for a more detailed explanation.</p>

    <list>
      <item><p>Use <code>insert(tool_item, position)</code> to insert the <code>tool_item</code> at <code>position</code>. If <code>position</code> is negative, the item is appended at the end of the toolbar.</p></item>
      <item><p><code>get_item_index(tool_item)</code> retrieves the position of <code>tool_item</code> on the toolbar.</p></item>
      <item><p><code>get_n_items()</code> returns the number of items on the toolbar; <code>get_nth_item(position)</code> returns the item in position <code>position</code>.</p></item>
      <item><p>If the toolbar does not have room for all the menu items, and <code>set_show_arrow(True)</code>, the items that do not have room are shown through an overflow menu.</p></item>
      <item><p><code>set_icon_size(icon_size)</code> sets the size of icons in the toolbar; <code>icon_size</code> can be one of <code>Gtk.IconSize.INVALID, Gtk.IconSize.MENU, Gtk.IconSize.SMALL_TOOLBAR, Gtk.IconSize.LARGE_TOOLBAR, Gtk.IconSize.BUTTON, Gtk.IconSize.DND, Gtk.IconSize.DIALOG</code>. This should be used only for special-purpose toolbars, normal application toolbars should respect user preferences for the size of icons. <code>unset_icon_size()</code> unsets the preferences set with <code>set_icon_size(icon_size)</code>, so that user preferences are used to determine the icon size.</p></item>
      <item><p><code>set_style(style)</code>, where <code>style</code> is one of <code>Gtk.ToolbarStyle.ICONS, Gtk.ToolbarStyle.TEXT, Gtk.ToolbarStyle.BOTH, Gtk.ToolbarStyle.BOTH_HORIZ</code>, sets if the toolbar shows only icons, only text, or both (vertically stacked or alongside each other). To let user preferences determine the toolbar style, and unset a toolbar style so set, use <code>unset_style()</code>.</p></item>
    </list>

  </section>

  <section id="reference">
    <title>API References</title>
    <p>In this sample we used the following:</p>
    <list>
      <item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkToolbar.html">GtkToolbar</link></p></item>
      <item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkToolButton.html">GtkToolButton</link></p></item>
      <item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkToolItem.html">GtkToolItem</link></p></item>
      <item><p><link href="http://developer.gnome.org/gtk3/unstable/gtk3-Stock-Items.html">Stock Items</link></p></item>
      <item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkActionable.html">GtkActionable</link></p></item>
      <item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkWidget.html">GtkWidget</link></p></item>
      <item><p><link href="http://developer.gnome.org/gdk3/unstable/gdk3-Event-Structures.html#GdkEventWindowState">Event Structures</link></p></item>
    </list>
  </section>
</page>