gtk2/docs/reference/gtk/tmpl/gtkexpander.sgml

<!-- ##### SECTION Title ##### -->
GtkExpander

<!-- ##### SECTION Short_Description ##### -->
A container which can hide its child

<!-- ##### SECTION Long_Description ##### -->
<para>
A #GtkExpander allows the user to hide or show its child by clicking on an expander triangle similar to 
the triangles used in a #GtkTreeView.
</para>

  <para>
    Normally you use an expander as you would use any other descendant
    of #GtkBin; you create the child widget and use
    gtk_container_add() to add it to the expander.  When the expander
    is toggled, it will take care of showing and hiding the child
    automatically.
  </para>

  <section id="expander-special-usage">
    <title>Special Usage</title>

    <para>
      There there are situations in which you may prefer to show and
      hide the expanded widget yourself, such as when you want to
      actually create the widget at expansion time.  In this case,
      create a #GtkExpander but do not add a child to it.  The
      expander widget has an <literal>expanded</literal> property
      which can be used to monitor its expansion state.  You should
      watch this property with a signal connection as follows:
    </para>

    <programlisting id="expander-callback-example">
expander = gtk_expander_new_with_mnemonic ("_More Options");
g_signal_connect (expander, "notify::expanded",
                  G_CALLBACK (expander_callback), NULL);

...

static void
expander_callback (GObject    *object,
                   GParamSpec *param_spec,
                   gpointer    user_data)
{
  GtkExpander *expander;

  expander = GTK_EXPANDER (object);

  if (gtk_expander_get_expanded (expander))
    {
      /* Show or create widgets */
    }
  else
    {
      /* Hide or destroy widgets */
    }
}

    </programlisting>
  </section>

<!-- ##### SECTION See_Also ##### -->
<para>

</para>

<!-- ##### STRUCT GtkExpander ##### -->
<para>

</para>


<!-- ##### SIGNAL GtkExpander::activate ##### -->
<para>

</para>

@expander: the object which received the signal.

<!-- ##### ARG GtkExpander:expanded ##### -->
<para>

</para>

<!-- ##### ARG GtkExpander:label ##### -->
<para>

</para>

<!-- ##### ARG GtkExpander:label-widget ##### -->
<para>

</para>

<!-- ##### ARG GtkExpander:spacing ##### -->
<para>

</para>

<!-- ##### ARG GtkExpander:use-markup ##### -->
<para>

</para>

<!-- ##### ARG GtkExpander:use-underline ##### -->
<para>

</para>

<!-- ##### ARG GtkExpander:expander-size ##### -->
<para>

</para>

<!-- ##### ARG GtkExpander:expander-spacing ##### -->
<para>

</para>

<!-- ##### FUNCTION gtk_expander_new ##### -->
<para>

</para>

@label: 
@Returns: 


<!-- ##### FUNCTION gtk_expander_new_with_mnemonic ##### -->
<para>

</para>

@label: 
@Returns: 


<!-- ##### FUNCTION gtk_expander_set_expanded ##### -->
<para>

</para>

@expander: 
@expanded: 


<!-- ##### FUNCTION gtk_expander_get_expanded ##### -->
<para>

</para>

@expander: 
@Returns: 


<!-- ##### FUNCTION gtk_expander_set_spacing ##### -->
<para>

</para>

@expander: 
@spacing: 


<!-- ##### FUNCTION gtk_expander_get_spacing ##### -->
<para>

</para>

@expander: 
@Returns: 


<!-- ##### FUNCTION gtk_expander_set_label ##### -->
<para>

</para>

@expander: 
@label: 


<!-- ##### FUNCTION gtk_expander_get_label ##### -->
<para>

</para>

@expander: 
@Returns: 


<!-- ##### FUNCTION gtk_expander_set_use_underline ##### -->
<para>

</para>

@expander: 
@use_underline: 


<!-- ##### FUNCTION gtk_expander_get_use_underline ##### -->
<para>

</para>

@expander: 
@Returns: 


<!-- ##### FUNCTION gtk_expander_set_use_markup ##### -->
<para>

</para>

@expander: 
@use_markup: 


<!-- ##### FUNCTION gtk_expander_get_use_markup ##### -->
<para>

</para>

@expander: 
@Returns: 


<!-- ##### FUNCTION gtk_expander_set_label_widget ##### -->
<para>

</para>

@expander: 
@label_widget: 


<!-- ##### FUNCTION gtk_expander_get_label_widget ##### -->
<para>

</para>

@expander: 
@Returns: