GtkExpander
A container which can hide its child
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.
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.
Special Usage
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 expanded property
which can be used to monitor its expansion state. You should
watch this property with a signal connection as follows:
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 */
}
}
@expander: the object which received the signal.
@label:
@Returns:
@label:
@Returns:
@expander:
@expanded:
@expander:
@Returns:
@expander:
@spacing:
@expander:
@Returns:
@expander:
@label:
@expander:
@Returns:
@expander:
@use_underline:
@expander:
@Returns:
@expander:
@use_markup:
@expander:
@Returns:
@expander:
@label_widget:
@expander:
@Returns: