forked from AuroraMiddleware/gtk
82 lines
2.4 KiB
XML
82 lines
2.4 KiB
XML
<?xml version="1.0"?>
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<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
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"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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]>
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<chapter id="gtk-migrating-GtkLinkButton">
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<title>Migrating from GnomeHRef to GtkLinkButton</title>
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<para>
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Since version 2.10, GTK+ provides the #GtkLinkButton widget as a
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replacement for the <structname>GnomeHRef</structname> widget
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in the libgnomeui library.
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</para>
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<para>
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Porting an application from <structname>GnomeHRef</structname> to
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#GtkLinkButton is very simple. #GtkLinkButton does not have a
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default action for #GtkButton::clicked signal. So instead of simply
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creating the widget
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<informalexample><programlisting>
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GtkWidget *button;
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button = gnome_href_new (url, "");
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</programlisting></informalexample>
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you will have to handle the activation of the #GtkLinkButton, using
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the ::clicked signal for instance
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<informalexample><programlisting>
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static void
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link_button_clicked_cb (GtkWidget *widget,
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gpointer data)
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{
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const gchar *link;
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link = gtk_link_button_get_uri (GTK_LINK_BUTTON (widget));
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open_browser_at_url (link);
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}
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/* ... */
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GtkWidget *button;
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button = gtk_link_button_new (url);
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g_signal_connect (button, "clicked",
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G_CALLBACK (link_button_clicked_cb), NULL);
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</programlisting></informalexample>
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If you have more than one #GtkLinkButton instead of connecting
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a signal to each one, you can use a "hook function" which will be
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called whenever a user activates a link button
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<informalexample><programlisting>
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static void
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link_button_hook (GtkLinkButton *button,
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const gchar *link,
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gpointer user_data)
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{
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open_browser_at_url (link);
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}
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/* ... */
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GtkWidget *button1 = gtk_link_button_new (uri1);
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GtkWidget *button2 = gtk_link_button_new (uri2);
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gtk_link_button_set_uri_hook (link_button_hook, NULL, NULL);
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</programlisting></informalexample>
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</para>
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<para>
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Starting with GTK+ 2.16, it is no longer necessary to set up a uri hook
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manually, since GTK+ now defaults to calling gtk_show_uri() if no uri
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hook has been set.
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</para>
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</chapter>
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<!--
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Local variables:
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mode: sgml
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sgml-parent-document: ("gtk-docs.sgml" "book" "part" "chapter")
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End:
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-->
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