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<div class="titlepage"><div><div><h2 class="title">
<a name="gtk-migrating-GtkLinkButton"></a>Migrating from GnomeHRef to GtkLinkButton</h2></div></div></div>
<p>
Since version 2.10, GTK+ provides the <a href="GtkLinkButton.html" title="GtkLinkButton"><span class="type">GtkLinkButton</span></a> widget as a
replacement for the <span class="structname">GnomeHRef</span> widget
in the libgnomeui library.
</p>
<p>
Porting an application from <span class="structname">GnomeHRef</span> to
<a href="GtkLinkButton.html" title="GtkLinkButton"><span class="type">GtkLinkButton</span></a> is very simple. <a href="GtkLinkButton.html" title="GtkLinkButton"><span class="type">GtkLinkButton</span></a> does not have a
default action for "clicked" signal. So instead of simply creating
the widget
</p>
<div class="informalexample"><pre class="programlisting">
GtkWidget *button;
button = gnome_href_new (url, "");
</pre></div>
<p>
you will have to handle the activation of the <a href="GtkLinkButton.html" title="GtkLinkButton"><span class="type">GtkLinkButton</span></a>, using
the "clicked" signal for instance
</p>
<div class="informalexample"><pre class="programlisting">
static void
link_button_clicked_cb (GtkWidget *widget,
gpointer data)
{
const gchar *link;
link = gtk_link_button_get_uri (GTK_LINK_BUTTON (widget));
open_browser_at_url (link);
}
/* ... */
GtkWidget *button;
button = gtk_link_button_new (url);
g_signal_connect (button, "clicked",
G_CALLBACK (link_button_clicked_cb), NULL);
</pre></div>
<p>
If you have more than one <a href="GtkLinkButton.html" title="GtkLinkButton"><span class="type">GtkLinkButton</span></a> instead of connecting
a signal to each one, you can use a "hook function" which will be
called whenever a user activates a link button
</p>
<div class="informalexample"><pre class="programlisting">
static void
link_button_hook (GtkLinkButton *button,
const gchar *link,
gpointer user_data)
{
open_browser_at_url (link);
}
/* ... */
GtkWidget *button1 = gtk_link_button_new (uri1);
GtkWidget *button2 = gtk_link_button_new (uri2);
gtk_link_button_set_uri_hook (link_button_hook, NULL, NULL);
</pre></div>
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