libmate-desktop: Add MateAboutDialog class

This will allow MATE applications to use traditional About dialogs with GTK 3
(unfortunately completely different starting from GTK 3.12).

This is just a fork of GtkAboutDialog of GTK 2.24, adapted to work with GTK 3 too.

4 files changed, 2392 insertions, 0 deletions

diff --git a/libmate-desktop/Makefile.am b/libmate-desktop/Makefile.am
index 98c9c00..b36047c 100644
--- a/libmate-desktop/Makefile.am
+++ b/libmate-desktop/Makefile.am
@@ -5,6 +5,7 @@ libmate_desktop_HEADERS = \
 	mate-desktop-item.h \
 	mate-dconf.h \
 	mate-gsettings.h \
+	mate-aboutdialog.h \
 	mate-bg.h			\
 	mate-bg-crossfade.h		\
 	mate-desktop-thumbnail.h	\
@@ -34,6 +35,7 @@ libmate_desktop_2_la_SOURCES = \
 	mate-thumbnail-pixbuf-utils.c \
 	mate-dconf.c \
 	mate-gsettings.c \
+	mate-aboutdialog.c \
 	mate-bg.c		\
 	mate-bg-crossfade.c	\
 	display-name.c		\
diff --git a/libmate-desktop/mate-aboutdialog.c b/libmate-desktop/mate-aboutdialog.c
new file mode 100644
index 0000000..08bd2cb
--- /dev/null
+++ b/libmate-desktop/mate-aboutdialog.c
@@ -0,0 +1,2264 @@
+/*
+ * mate-aboutdialog.c: Traditional GTK+ About Dialog
+ *
+ * Copyright (C) 2001 CodeFactory AB
+ * Copyright (C) 2001, 2002 Anders Carlsson
+ * Copyright (C) 2003, 2004 Matthias Clasen <[email protected]>
+ * Copyright (C) 2014 Stefano Karapetsas <[email protected]>
+ *
+ * This file is part of the Mate Library.
+ *
+ * The Mate Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Mate Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with the Mate Library; see the file COPYING.LIB.  If not,
+ * write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * Author: Stefano Karapetsas <[email protected]>
+ */
+
+#include "config.h"
+
+#include "mate-aboutdialog.h"
+
+#include <string.h>
+
+#include <gdk/gdkkeysyms.h>
+#if GTK_CHECK_VERSION (3, 0, 0)
+#include <gdk/gdkkeysyms-compat.h>
+#endif
+#include <gtk/gtk.h>
+#include <glib/gi18n-lib.h>
+
+
+/**
+ * The #MateAboutDialog offers a simple way to display information about
+ * a program like its logo, name, copyright, website and license. It is
+ * also possible to give credits to the authors, documenters, translators
+ * and artists who have worked on the program. An about dialog is typically
+ * opened when the user selects the <literal>About</literal> option from
+ * the <literal>Help</literal> menu. All parts of the dialog are optional.
+ *
+ * To make constructing a #MateAboutDialog as convenient as possible, you can
+ * use the function mate_show_about_dialog() which constructs and shows a dialog
+ * and keeps it around so that it can be shown again.
+ *
+ * Note that GTK+ sets a default title of <literal>_("About &percnt;s")</literal>
+ * on the dialog window (where &percnt;s is replaced by the name of the
+ * application, but in order to ensure proper translation of the title,
+ * applications should set the title property explicitly when constructing
+ * a #MateAboutDialog, as shown in the following example:
+ * <informalexample><programlisting>
+ * mate_show_about_dialog (NULL,
+ *                         "program-name", "ExampleCode",
+ *                         "logo", example_logo,
+ *                         "title" _("About ExampleCode"),
+ *                         NULL);
+ * </programlisting></informalexample>
+ */
+
+
+static GdkColor default_link_color = { 0, 0, 0, 0xeeee };
+static GdkColor default_visited_link_color = { 0, 0x5555, 0x1a1a, 0x8b8b };
+
+typedef struct _MateAboutDialogPrivate MateAboutDialogPrivate;
+struct _MateAboutDialogPrivate
+{
+  gchar *name;
+  gchar *version;
+  gchar *copyright;
+  gchar *comments;
+  gchar *website_url;
+  gchar *website_text;
+  gchar *translator_credits;
+  gchar *license;
+
+  gchar **authors;
+  gchar **documenters;
+  gchar **artists;
+
+  GtkWidget *logo_image;
+  GtkWidget *name_label;
+  GtkWidget *comments_label;
+  GtkWidget *copyright_label;
+  GtkWidget *website_label;
+
+  GtkWidget *credits_button;
+  GtkWidget *credits_dialog;
+  GtkWidget *license_button;
+  GtkWidget *license_dialog;
+
+  GdkCursor *hand_cursor;
+  GdkCursor *regular_cursor;
+
+  GSList *visited_links;
+
+  guint hovering_over_link : 1;
+  guint wrap_license : 1;
+};
+
+#define MATE_ABOUT_DIALOG_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), MATE_TYPE_ABOUT_DIALOG, MateAboutDialogPrivate))
+
+
+enum
+{
+  PROP_0,
+  PROP_NAME,
+  PROP_VERSION,
+  PROP_COPYRIGHT,
+  PROP_COMMENTS,
+  PROP_WEBSITE,
+  PROP_WEBSITE_LABEL,
+  PROP_LICENSE,
+  PROP_AUTHORS,
+  PROP_DOCUMENTERS,
+  PROP_TRANSLATOR_CREDITS,
+  PROP_ARTISTS,
+  PROP_LOGO,
+  PROP_LOGO_ICON_NAME,
+  PROP_WRAP_LICENSE
+};
+
+static void                 mate_about_dialog_finalize       (GObject            *object);
+static void                 mate_about_dialog_get_property   (GObject            *object,
+                                                              guint               prop_id,
+                                                              GValue             *value,
+                                                              GParamSpec         *pspec);
+static void                 mate_about_dialog_set_property   (GObject            *object,
+                                                              guint               prop_id,
+                                                              const GValue       *value,
+                                                              GParamSpec         *pspec);
+static void                 mate_about_dialog_show           (GtkWidget          *widge);
+static void                 update_name_version              (MateAboutDialog    *about);
+static GtkIconSet *         icon_set_new_from_pixbufs        (GList              *pixbufs);
+static void                 follow_if_link                   (MateAboutDialog    *about,
+                                                              GtkTextView        *text_view,
+                                                              GtkTextIter        *iter);
+static void                 set_cursor_if_appropriate        (MateAboutDialog    *about,
+                                                              GtkTextView        *text_view,
+                                                              gint                x,
+                                                              gint                y);
+static void                 display_credits_dialog           (GtkWidget          *button,
+                                                              gpointer            data);
+static void                 display_license_dialog           (GtkWidget          *button,
+                                                              gpointer            data);
+static void                 close_cb                         (MateAboutDialog    *about);
+static gboolean             mate_about_dialog_activate_link  (MateAboutDialog    *about,
+                                                              const gchar        *uri);
+
+static void                 default_url_hook                 (MateAboutDialog    *about,
+                                                              const gchar        *uri,
+                                                              gpointer            user_data);
+static void                 default_email_hook               (MateAboutDialog    *about,
+                                                              const gchar        *email_address,
+                                                              gpointer            user_data);
+
+static void
+default_url_hook (MateAboutDialog *about,
+                  const gchar    *uri,
+                  gpointer        user_data)
+{
+  GdkScreen *screen;
+  GError *error = NULL;
+
+  screen = gtk_widget_get_screen (GTK_WIDGET (about));
+
+  if (!gtk_show_uri (screen, uri, gtk_get_current_event_time (), &error))
+    {
+      GtkWidget *dialog;
+
+      dialog = gtk_message_dialog_new (GTK_WINDOW (about),
+                                       GTK_DIALOG_DESTROY_WITH_PARENT |
+                                       GTK_DIALOG_MODAL,
+                                       GTK_MESSAGE_ERROR,
+                                       GTK_BUTTONS_CLOSE,
+                                       "%s", _("Could not show link"));
+      gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
+                                                "%s", error->message);
+      g_error_free (error);
+
+      g_signal_connect (dialog, "response",
+                        G_CALLBACK (gtk_widget_destroy), NULL);
+
+      gtk_window_present (GTK_WINDOW (dialog));
+    }
+}
+
+static void
+default_email_hook (MateAboutDialog *about,
+                    const gchar    *email_address,
+                    gpointer        user_data)
+{
+  char *escaped, *uri;
+
+  escaped = g_uri_escape_string (email_address, NULL, FALSE);
+  uri = g_strdup_printf ("mailto:%s", escaped);
+  g_free (escaped);
+
+  default_url_hook (about, uri, user_data);
+  g_free (uri);
+}
+
+G_DEFINE_TYPE (MateAboutDialog, mate_about_dialog, GTK_TYPE_DIALOG)
+
+static void
+mate_about_dialog_class_init (MateAboutDialogClass *klass)
+{
+  GObjectClass *object_class;
+  GtkWidgetClass *widget_class;
+
+  object_class = (GObjectClass *)klass;
+  widget_class = (GtkWidgetClass *)klass;
+
+  object_class->set_property = mate_about_dialog_set_property;
+  object_class->get_property = mate_about_dialog_get_property;
+
+  object_class->finalize = mate_about_dialog_finalize;
+
+  widget_class->show = mate_about_dialog_show;
+
+  /**
+   * MateAboutDialog:program-name:
+   *
+   * The name of the program.
+   * If this is not set, it defaults to g_get_application_name().
+   *
+   * Since: 1.9
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_NAME,
+                                   g_param_spec_string ("program-name",
+                                                        N_("Program name"),
+                                                        N_("The name of the program. If this is not set, it defaults to g_get_application_name()"),
+                                                        NULL,
+                                                        G_PARAM_READWRITE));
+
+  /**
+   * MateAboutDialog:version:
+   *
+   * The version of the program.
+   *
+   * Since: 1.9
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_VERSION,
+                                   g_param_spec_string ("version",
+                                                        N_("Program version"),
+                                                        N_("The version of the program"),
+                                                        NULL,
+                                                        G_PARAM_READWRITE));
+
+  /**
+   * MateAboutDialog:copyright:
+   *
+   * Copyright information for the program.
+   *
+   * Since: 1.9
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_COPYRIGHT,
+                                   g_param_spec_string ("copyright",
+                                                        N_("Copyright string"),
+                                                        N_("Copyright information for the program"),
+                                                        NULL,
+                                                        G_PARAM_READWRITE));
+        
+
+  /**
+   * MateAboutDialog:comments:
+   *
+   * Comments about the program. This string is displayed in a label
+   * in the main dialog, thus it should be a short explanation of
+   * the main purpose of the program, not a detailed list of features.
+   *
+   * Since: 1.9
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_COMMENTS,
+                                   g_param_spec_string ("comments",
+                                                        N_("Comments string"),
+                                                        N_("Comments about the program"),
+                                                        NULL,
+                                                        G_PARAM_READWRITE));
+
+  /**
+   * MateAboutDialog:license:
+   *
+   * The license of the program. This string is displayed in a
+   * text view in a secondary dialog, therefore it is fine to use
+   * a long multi-paragraph text. Note that the text is only wrapped
+   * in the text view if the "wrap-license" property is set to %TRUE;
+   * otherwise the text itself must contain the intended linebreaks.
+   *
+   * Since: 1.9
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_LICENSE,
+                                   g_param_spec_string ("license",
+                                                        _("License"),
+                                                        _("The license of the program"),
+                                                        NULL,
+                                                        G_PARAM_READWRITE));
+
+  /**
+   * MateAboutDialog:website:
+   *
+   * The URL for the link to the website of the program.
+   * This should be a string starting with "http://.
+   *
+   * Since: 1.9
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_WEBSITE,
+                                   g_param_spec_string ("website",
+                                                        N_("Website URL"),
+                                                        N_("The URL for the link to the website of the program"),
+                                                        NULL,
+                                                        G_PARAM_READWRITE));
+
+  /**
+   * MateAboutDialog:website-label:
+   *
+   * The label for the link to the website of the program. If this is not set,
+   * it defaults to the URL specified in the #MateAboutDialog:website property.
+   *
+   * Since: 1.9
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_WEBSITE_LABEL,
+                                   g_param_spec_string ("website-label",
+                                                        N_("Website label"),
+                                                        N_("The label for the link to the website of the program. If this is not set, it defaults to the URL"),
+                                                        NULL,
+                                                        G_PARAM_READWRITE));
+
+  /**
+   * MateAboutDialog:authors:
+   *
+   * The authors of the program, as a %NULL-terminated array of strings.
+   * Each string may contain email addresses and URLs, which will be displayed
+   * as links, see the introduction for more details.
+   *
+   * Since: 1.9
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_AUTHORS,
+                                   g_param_spec_boxed ("authors",
+                                                       N_("Authors"),
+                                                       N_("List of authors of the program"),
+                                                       G_TYPE_STRV,
+                                                       G_PARAM_READWRITE));
+
+  /**
+   * MateAboutDialog:documenters:
+   *
+   * The people documenting the program, as a %NULL-terminated array of strings.
+   * Each string may contain email addresses and URLs, which will be displayed
+   * as links, see the introduction for more details.
+   *
+   * Since: 1.9
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_DOCUMENTERS,
+                                   g_param_spec_boxed ("documenters",
+                                                       N_("Documenters"),
+                                                       N_("List of people documenting the program"),
+                                                       G_TYPE_STRV,
+                                                       G_PARAM_READWRITE));
+
+  /**
+   * MateAboutDialog:artists:
+   *
+   * The people who contributed artwork to the program, as a %NULL-terminated
+   * array of strings. Each string may contain email addresses and URLs, which
+   * will be displayed as links, see the introduction for more details.
+   *
+   * Since: 1.9
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_ARTISTS,
+                                   g_param_spec_boxed ("artists",
+                                                       N_("Artists"),
+                                                       N_("List of people who have contributed artwork to the program"),
+                                                       G_TYPE_STRV,
+                                                       G_PARAM_READWRITE));
+
+
+  /**
+   * MateAboutDialog:translator-credits:
+   *
+   * Credits to the translators. This string should be marked as translatable.
+   * The string may contain email addresses and URLs, which will be displayed
+   * as links, see the introduction for more details.
+   *
+   * Since: 1.9
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_TRANSLATOR_CREDITS,
+                                   g_param_spec_string ("translator-credits",
+                                                        N_("Translator credits"),
+                                                        N_("Credits to the translators. This string should be marked as translatable"),
+                                                        NULL,
+                                                        G_PARAM_READWRITE));
+        
+  /**
+   * MateAboutDialog:logo:
+   *
+   * A logo for the about box. If this is not set, it defaults to
+   * gtk_window_get_default_icon_list().
+   *
+   * Since: 1.9
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_LOGO,
+                                   g_param_spec_object ("logo",
+                                                        N_("Logo"),
+                                                        N_("A logo for the about box. If this is not set, it defaults to gtk_window_get_default_icon_list()"),
+                                                        GDK_TYPE_PIXBUF,
+                                                        G_PARAM_READWRITE));
+
+  /**
+   * MateAboutDialog:logo-icon-name:
+   *
+   * A named icon to use as the logo for the about box. This property
+   * overrides the #MateAboutDialog:logo property.
+   *
+   * Since: 1.9
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_LOGO_ICON_NAME,
+                                   g_param_spec_string ("logo-icon-name",
+                                                        N_("Logo Icon Name"),
+                                                        N_("A named icon to use as the logo for the about box."),
+                                                        NULL,
+                                                        G_PARAM_READWRITE));
+  /**
+   * MateAboutDialog:wrap-license:
+   *
+   * Whether to wrap the text in the license dialog.
+   *
+   * Since: 1.9
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_WRAP_LICENSE,
+                                   g_param_spec_boolean ("wrap-license",
+                                                         N_("Wrap license"),
+                                                         N_("Whether to wrap the license text."),
+                                                         FALSE,
+                                                         G_PARAM_READWRITE));
+
+
+  g_type_class_add_private (object_class, sizeof (MateAboutDialogPrivate));
+}
+
+static void
+mate_about_dialog_init (MateAboutDialog *about)
+{
+  GtkDialog *dialog = GTK_DIALOG (about);
+  MateAboutDialogPrivate *priv;
+  GtkWidget *vbox, *hbox, *button, *close_button, *image;
+
+  /* Data */
+  priv = MATE_ABOUT_DIALOG_GET_PRIVATE (about);
+  about->private_data = priv;
+
+  priv->name = NULL;
+  priv->version = NULL;
+  priv->copyright = NULL;
+  priv->comments = NULL;
+  priv->website_url = NULL;
+  priv->website_text = NULL;
+  priv->translator_credits = NULL;
+  priv->license = NULL;
+  priv->authors = NULL;
+  priv->documenters = NULL;
+  priv->artists = NULL;
+
+  priv->hand_cursor = gdk_cursor_new (GDK_HAND2);
+  priv->regular_cursor = gdk_cursor_new (GDK_XTERM);
+  priv->hovering_over_link = FALSE;
+  priv->wrap_license = FALSE;
+
+  gtk_container_set_border_width (GTK_CONTAINER (dialog), 5);
+  gtk_box_set_spacing (GTK_BOX (gtk_dialog_get_content_area (dialog)), 2); /* 2 * 5 + 2 = 12 */
+  gtk_container_set_border_width (GTK_CONTAINER (gtk_dialog_get_action_area (dialog)), 5);
+
+  /* Widgets */
+  gtk_widget_push_composite_child ();
+
+  vbox = gtk_vbox_new (FALSE, 8);
+  gtk_container_set_border_width (GTK_CONTAINER (vbox), 5);
+  gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (dialog)), vbox, TRUE, TRUE, 0);
+
+  priv->logo_image = gtk_image_new ();
+  gtk_box_pack_start (GTK_BOX (vbox), priv->logo_image, FALSE, FALSE, 0);
+
+  priv->name_label = gtk_label_new (NULL);
+  gtk_label_set_selectable (GTK_LABEL (priv->name_label), TRUE);
+  gtk_label_set_justify (GTK_LABEL (priv->name_label), GTK_JUSTIFY_CENTER);
+  gtk_box_pack_start (GTK_BOX (vbox), priv->name_label, FALSE, FALSE, 0);
+
+  priv->comments_label = gtk_label_new (NULL);
+  gtk_label_set_selectable (GTK_LABEL (priv->comments_label), TRUE);
+  gtk_label_set_justify (GTK_LABEL (priv->comments_label), GTK_JUSTIFY_CENTER);
+  gtk_label_set_line_wrap (GTK_LABEL (priv->comments_label), TRUE);
+  gtk_box_pack_start (GTK_BOX (vbox), priv->comments_label, FALSE, FALSE, 0);
+
+  priv->copyright_label = gtk_label_new (NULL);
+  gtk_label_set_selectable (GTK_LABEL (priv->copyright_label), TRUE);
+  gtk_label_set_justify (GTK_LABEL (priv->copyright_label), GTK_JUSTIFY_CENTER);
+  gtk_box_pack_start (GTK_BOX (vbox), priv->copyright_label, FALSE, FALSE, 0);
+
+  hbox = gtk_hbox_new (TRUE, 0);
+  gtk_box_pack_start (GTK_BOX (vbox), hbox, TRUE, FALSE, 0);
+
+  priv->website_label = button = gtk_label_new ("");
+  gtk_widget_set_no_show_all (button, TRUE);
+  gtk_label_set_selectable (GTK_LABEL (button), TRUE);
+  gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
+  g_signal_connect_swapped (button, "activate-link",
+                            G_CALLBACK (mate_about_dialog_activate_link), about);
+
+  gtk_widget_show (vbox);
+  gtk_widget_show (priv->logo_image);
+  gtk_widget_show (priv->name_label);
+  gtk_widget_show (hbox);
+
+  /* Add the close button */
+  close_button = gtk_dialog_add_button (GTK_DIALOG (about), GTK_STOCK_CLOSE,
+                                        GTK_RESPONSE_CANCEL);
+  gtk_dialog_set_default_response (GTK_DIALOG (about), GTK_RESPONSE_CANCEL);
+
+  /* Add the credits button */
+  button = gtk_button_new_with_mnemonic (_("C_redits"));
+  gtk_widget_set_can_default (button, TRUE);
+  image = gtk_image_new_from_stock (GTK_STOCK_ABOUT, GTK_ICON_SIZE_BUTTON);
+  gtk_button_set_image (GTK_BUTTON (button), image);
+  gtk_widget_set_no_show_all (button, TRUE);
+  gtk_box_pack_end (GTK_BOX (gtk_dialog_get_action_area (GTK_DIALOG (about))),
+                    button, FALSE, TRUE, 0);
+  gtk_button_box_set_child_secondary (GTK_BUTTON_BOX (gtk_dialog_get_action_area (GTK_DIALOG (about))), button, TRUE);
+  g_signal_connect (button, "clicked",
+                    G_CALLBACK (display_credits_dialog), about);
+  priv->credits_button = button;
+  priv->credits_dialog = NULL;
+
+  /* Add the license button */
+  button = gtk_button_new_from_stock (_("_License"));
+  gtk_widget_set_can_default (button, TRUE);
+  gtk_widget_set_no_show_all (button, TRUE);
+  gtk_box_pack_end (GTK_BOX (gtk_dialog_get_action_area (GTK_DIALOG (about))),
+                    button, FALSE, TRUE, 0);
+  gtk_button_box_set_child_secondary (GTK_BUTTON_BOX (gtk_dialog_get_action_area (GTK_DIALOG (about))), button, TRUE);
+  g_signal_connect (button, "clicked",
+                    G_CALLBACK (display_license_dialog), about);
+  priv->license_button = button;
+  priv->license_dialog = NULL;
+
+  gtk_window_set_resizable (GTK_WINDOW (about), FALSE);
+
+  gtk_widget_pop_composite_child ();
+
+  gtk_widget_grab_default (close_button);
+  gtk_widget_grab_focus (close_button);
+
+  /* force defaults */
+  mate_about_dialog_set_program_name (about, NULL);
+  mate_about_dialog_set_logo (about, NULL);
+}
+
+static void
+mate_about_dialog_finalize (GObject *object)
+{
+  MateAboutDialog *about = MATE_ABOUT_DIALOG (object);
+  MateAboutDialogPrivate *priv = (MateAboutDialogPrivate *)about->private_data;
+
+  g_free (priv->name);
+  g_free (priv->version);
+  g_free (priv->copyright);
+  g_free (priv->comments);
+  g_free (priv->license);
+  g_free (priv->website_url);
+  g_free (priv->website_text);
+  g_free (priv->translator_credits);
+
+  g_strfreev (priv->authors);
+  g_strfreev (priv->documenters);
+  g_strfreev (priv->artists);
+
+  g_slist_foreach (priv->visited_links, (GFunc)g_free, NULL);
+  g_slist_free (priv->visited_links);
+
+  gdk_cursor_unref (priv->hand_cursor);
+  gdk_cursor_unref (priv->regular_cursor);
+
+  G_OBJECT_CLASS (mate_about_dialog_parent_class)->finalize (object);
+}
+
+static void
+mate_about_dialog_set_property (GObject      *object,
+                               guint         prop_id,
+                               const GValue *value,
+                               GParamSpec   *pspec)
+{
+  MateAboutDialog *about = MATE_ABOUT_DIALOG (object);
+  MateAboutDialogPrivate *priv = (MateAboutDialogPrivate *)about->private_data;
+
+  switch (prop_id)
+    {
+    case PROP_NAME:
+      mate_about_dialog_set_program_name (about, g_value_get_string (value));
+      break;
+    case PROP_VERSION:
+      mate_about_dialog_set_version (about, g_value_get_string (value));
+      break;
+    case PROP_COMMENTS:
+      mate_about_dialog_set_comments (about, g_value_get_string (value));
+      break;
+    case PROP_WEBSITE:
+      mate_about_dialog_set_website (about, g_value_get_string (value));
+      break;
+    case PROP_WEBSITE_LABEL:
+      mate_about_dialog_set_website_label (about, g_value_get_string (value));
+      break;
+    case PROP_LICENSE:
+      mate_about_dialog_set_license (about, g_value_get_string (value));
+      break;
+    case PROP_COPYRIGHT:
+      mate_about_dialog_set_copyright (about, g_value_get_string (value));
+      break;
+    case PROP_LOGO:
+      mate_about_dialog_set_logo (about, g_value_get_object (value));
+      break;
+    case PROP_AUTHORS:
+      mate_about_dialog_set_authors (about, (const gchar**)g_value_get_boxed (value));
+      break;
+    case PROP_DOCUMENTERS:
+      mate_about_dialog_set_documenters (about, (const gchar**)g_value_get_boxed (value));
+      break;
+    case PROP_ARTISTS:
+      mate_about_dialog_set_artists (about, (const gchar**)g_value_get_boxed (value));
+      break;
+    case PROP_TRANSLATOR_CREDITS:
+      mate_about_dialog_set_translator_credits (about, g_value_get_string (value));
+      break;
+    case PROP_LOGO_ICON_NAME:
+      mate_about_dialog_set_logo_icon_name (about, g_value_get_string (value));
+      break;
+    case PROP_WRAP_LICENSE:
+      priv->wrap_license = g_value_get_boolean (value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+mate_about_dialog_get_property (GObject    *object,
+                               guint       prop_id,
+                               GValue     *value,
+                               GParamSpec *pspec)
+{
+  MateAboutDialog *about = MATE_ABOUT_DIALOG (object);
+  MateAboutDialogPrivate *priv = (MateAboutDialogPrivate *)about->private_data;
+
+  switch (prop_id)
+    {
+    case PROP_NAME:
+      g_value_set_string (value, priv->name);
+      break;
+    case PROP_VERSION:
+      g_value_set_string (value, priv->version);
+      break;
+    case PROP_COPYRIGHT:
+      g_value_set_string (value, priv->copyright);
+      break;
+    case PROP_COMMENTS:
+      g_value_set_string (value, priv->comments);
+      break;
+    case PROP_WEBSITE:
+      g_value_set_string (value, priv->website_url);
+      break;
+    case PROP_WEBSITE_LABEL:
+      g_value_set_string (value, priv->website_text);
+      break;
+    case PROP_LICENSE:
+      g_value_set_string (value, priv->license);
+      break;
+    case PROP_TRANSLATOR_CREDITS:
+      g_value_set_string (value, priv->translator_credits);
+      break;
+    case PROP_AUTHORS:
+      g_value_set_boxed (value, priv->authors);
+      break;
+    case PROP_DOCUMENTERS:
+      g_value_set_boxed (value, priv->documenters);
+      break;
+    case PROP_ARTISTS:
+      g_value_set_boxed (value, priv->artists);
+      break;
+    case PROP_LOGO:
+      if (gtk_image_get_storage_type (GTK_IMAGE (priv->logo_image)) == GTK_IMAGE_PIXBUF)
+        g_value_set_object (value, gtk_image_get_pixbuf (GTK_IMAGE (priv->logo_image)));
+      else
+        g_value_set_object (value, NULL);
+      break;
+    case PROP_LOGO_ICON_NAME:
+      if (gtk_image_get_storage_type (GTK_IMAGE (priv->logo_image)) == GTK_IMAGE_ICON_NAME)
+        {
+          const gchar *icon_name;
+
+          gtk_image_get_icon_name (GTK_IMAGE (priv->logo_image), &icon_name, NULL);
+          g_value_set_string (value, icon_name);
+        }
+      else
+        g_value_set_string (value, NULL);
+      break;
+    case PROP_WRAP_LICENSE:
+      g_value_set_boolean (value, priv->wrap_license);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static gboolean
+mate_about_dialog_activate_link (MateAboutDialog *about,
+                                const gchar    *uri)
+{
+  if (g_str_has_prefix (uri, "mailto:"))
+    {
+      gchar *email;
+
+      email = g_uri_unescape_string (uri + strlen ("mailto:"), NULL);
+
+      default_email_hook (about, email, NULL);
+
+      g_free (email);
+    }
+  else
+    {
+      default_url_hook (about, uri, NULL);
+    }
+
+  return TRUE;
+}
+
+static void
+update_website (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv = (MateAboutDialogPrivate *)about->private_data;
+
+  gtk_widget_show (priv->website_label);
+
+  if (priv->website_url)
+    {
+      gchar *markup;
+
+      if (priv->website_text)
+        {
+          gchar *escaped;
+
+          escaped = g_markup_escape_text (priv->website_text, -1);
+          markup = g_strdup_printf ("<a href=\"%s\">%s</a>",
+                                    priv->website_url, escaped);
+          g_free (escaped);
+        }
+      else
+        {
+          markup = g_strdup_printf ("<a href=\"%s\">%s</a>",
+                                    priv->website_url, priv->website_url);
+        }
+
+      gtk_label_set_markup (GTK_LABEL (priv->website_label), markup);
+      g_free (markup);
+    }
+  else
+    {
+      gtk_widget_hide (priv->website_label);
+    }
+}
+
+static void
+mate_about_dialog_show (GtkWidget *widget)
+{
+  update_website (MATE_ABOUT_DIALOG (widget));
+
+  GTK_WIDGET_CLASS (mate_about_dialog_parent_class)->show (widget);
+}
+
+/**
+ * mate_about_dialog_get_program_name:
+ * @about: a #MateAboutDialog
+ *
+ * Returns the program name displayed in the about dialog.
+ *
+ * Return value: The program name. The string is owned by the about
+ *  dialog and must not be modified.
+ *
+ * Since: 1.9 */
+const gchar *
+mate_about_dialog_get_program_name (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv;
+
+  g_return_val_if_fail (MATE_IS_ABOUT_DIALOG (about), NULL);
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  return priv->name;
+}
+
+static void
+update_name_version (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv;
+  gchar *title_string, *name_string;
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  title_string = g_strdup_printf (_("About %s"), priv->name);
+  gtk_window_set_title (GTK_WINDOW (about), title_string);
+  g_free (title_string);
+
+  if (priv->version != NULL)
+    name_string = g_markup_printf_escaped ("<span size=\"xx-large\" weight=\"bold\">%s %s</span>",
+                                             priv->name, priv->version);
+  else
+    name_string = g_markup_printf_escaped ("<span size=\"xx-large\" weight=\"bold\">%s</span>",
+                                           priv->name);
+
+  gtk_label_set_markup (GTK_LABEL (priv->name_label), name_string);
+
+  g_free (name_string);
+}
+
+/**
+ * mate_about_dialog_set_program_name:
+ * @about: a #MateAboutDialog
+ * @name: the program name
+ *
+ * Sets the name to display in the about dialog.
+ * If this is not set, it defaults to g_get_application_name().
+ *
+ * Since: 1.9
+ */
+void
+mate_about_dialog_set_program_name (MateAboutDialog *about,
+                                   const gchar    *name)
+{
+  MateAboutDialogPrivate *priv;
+  gchar *tmp;
+
+  g_return_if_fail (MATE_IS_ABOUT_DIALOG (about));
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+  tmp = priv->name;
+  priv->name = g_strdup (name ? name : g_get_application_name ());
+  g_free (tmp);
+
+  update_name_version (about);
+
+  g_object_notify (G_OBJECT (about), "program-name");
+}
+
+
+/**
+ * mate_about_dialog_get_version:
+ * @about: a #MateAboutDialog
+ *
+ * Returns the version string.
+ *
+ * Return value: The version string. The string is owned by the about
+ *  dialog and must not be modified.
+ *
+ * Since: 1.9
+ */
+const gchar *
+mate_about_dialog_get_version (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv;
+
+  g_return_val_if_fail (MATE_IS_ABOUT_DIALOG (about), NULL);
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  return priv->version;
+}
+
+/**
+ * mate_about_dialog_set_version:
+ * @about: a #MateAboutDialog
+ * @version: (allow-none): the version string
+ *
+ * Sets the version string to display in the about dialog.
+ *
+ * Since: 1.9
+ */
+void
+mate_about_dialog_set_version (MateAboutDialog *about,
+                              const gchar    *version)
+{
+  MateAboutDialogPrivate *priv;
+  gchar *tmp;
+
+  g_return_if_fail (MATE_IS_ABOUT_DIALOG (about));
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  tmp = priv->version;
+  priv->version = g_strdup (version);
+  g_free (tmp);
+
+  update_name_version (about);
+
+  g_object_notify (G_OBJECT (about), "version");
+}
+
+/**
+ * mate_about_dialog_get_copyright:
+ * @about: a #MateAboutDialog
+ *
+ * Returns the copyright string.
+ *
+ * Return value: The copyright string. The string is owned by the about
+ *  dialog and must not be modified.
+ *
+ * Since: 1.9
+ */
+const gchar *
+mate_about_dialog_get_copyright (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv;
+
+  g_return_val_if_fail (MATE_IS_ABOUT_DIALOG (about), NULL);
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  return priv->copyright;
+}
+
+/**
+ * mate_about_dialog_set_copyright:
+ * @about: a #MateAboutDialog
+ * @copyright: (allow-none) the copyright string
+ *
+ * Sets the copyright string to display in the about dialog.
+ * This should be a short string of one or two lines.
+ *
+ * Since: 1.9
+ */
+void
+mate_about_dialog_set_copyright (MateAboutDialog *about,
+                                const gchar    *copyright)
+{
+  MateAboutDialogPrivate *priv;
+  gchar *copyright_string, *tmp;
+
+  g_return_if_fail (MATE_IS_ABOUT_DIALOG (about));
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  tmp = priv->copyright;
+  priv->copyright = g_strdup (copyright);
+  g_free (tmp);
+
+  if (priv->copyright != NULL)
+    {
+      copyright_string = g_markup_printf_escaped ("<span size=\"small\">%s</span>",
+                                                  priv->copyright);
+      gtk_label_set_markup (GTK_LABEL (priv->copyright_label), copyright_string);
+      g_free (copyright_string);
+
+      gtk_widget_show (priv->copyright_label);
+    }
+  else
+    gtk_widget_hide (priv->copyright_label);
+
+  g_object_notify (G_OBJECT (about), "copyright");
+}
+
+/**
+ * mate_about_dialog_get_comments:
+ * @about: a #MateAboutDialog
+ *
+ * Returns the comments string.
+ *
+ * Return value: The comments. The string is owned by the about
+ *  dialog and must not be modified.
+ *
+ * Since: 1.9
+ */
+const gchar *
+mate_about_dialog_get_comments (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv;
+
+  g_return_val_if_fail (MATE_IS_ABOUT_DIALOG (about), NULL);
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  return priv->comments;
+}
+
+/**
+ * mate_about_dialog_set_comments:
+ * @about: a #MateAboutDialog
+ * @comments: (allow-none): a comments string
+ *
+ * Sets the comments string to display in the about dialog.
+ * This should be a short string of one or two lines.
+ *
+ * Since: 1.9
+ */
+void
+mate_about_dialog_set_comments (MateAboutDialog *about,
+                               const gchar    *comments)
+{
+  MateAboutDialogPrivate *priv;
+  gchar *tmp;
+
+  g_return_if_fail (MATE_IS_ABOUT_DIALOG (about));
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  tmp = priv->comments;
+  if (comments)
+    {
+      priv->comments = g_strdup (comments);
+      gtk_label_set_text (GTK_LABEL (priv->comments_label), priv->comments);
+      gtk_widget_show (priv->comments_label);
+    }
+  else
+    {
+      priv->comments = NULL;
+      gtk_widget_hide (priv->comments_label);
+    }
+  g_free (tmp);
+
+  g_object_notify (G_OBJECT (about), "comments");
+}
+
+/**
+ * mate_about_dialog_get_license:
+ * @about: a #MateAboutDialog
+ *
+ * Returns the license information.
+ *
+ * Return value: The license information. The string is owned by the about
+ *  dialog and must not be modified.
+ *
+ * Since: 1.9
+ */
+const gchar *
+mate_about_dialog_get_license (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv;
+
+  g_return_val_if_fail (MATE_IS_ABOUT_DIALOG (about), NULL);
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  return priv->license;
+}
+
+/**
+ * mate_about_dialog_set_license:
+ * @about: a #MateAboutDialog
+ * @license: (allow-none): the license information or %NULL
+ *
+ * Sets the license information to be displayed in the secondary
+ * license dialog. If @license is %NULL, the license button is
+ * hidden.
+ *
+ * Since: 1.9
+ */
+void
+mate_about_dialog_set_license (MateAboutDialog *about,
+                              const gchar    *license)
+{
+  MateAboutDialogPrivate *priv;
+  gchar *tmp;
+
+  g_return_if_fail (MATE_IS_ABOUT_DIALOG (about));
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  tmp = priv->license;
+  if (license)
+    {
+      priv->license = g_strdup (license);
+      gtk_widget_show (priv->license_button);
+    }
+  else
+    {
+      priv->license = NULL;
+      gtk_widget_hide (priv->license_button);
+    }
+  g_free (tmp);
+
+  g_object_notify (G_OBJECT (about), "license");
+}
+
+/**
+ * mate_about_dialog_get_wrap_license:
+ * @about: a #MateAboutDialog
+ *
+ * Returns whether the license text in @about is
+ * automatically wrapped.
+ *
+ * Returns: %TRUE if the license text is wrapped
+ *
+ * Since: 1.9
+ */
+gboolean
+mate_about_dialog_get_wrap_license (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv;
+
+  g_return_val_if_fail (MATE_IS_ABOUT_DIALOG (about), FALSE);
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  return priv->wrap_license;
+}
+
+/**
+ * mate_about_dialog_set_wrap_license:
+ * @about: a #MateAboutDialog
+ * @wrap_license: whether to wrap the license
+ *
+ * Sets whether the license text in @about is
+ * automatically wrapped.
+ *
+ * Since: 1.9
+ */
+void
+mate_about_dialog_set_wrap_license (MateAboutDialog *about,
+                                   gboolean        wrap_license)
+{
+  MateAboutDialogPrivate *priv;
+
+  g_return_if_fail (MATE_IS_ABOUT_DIALOG (about));
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  wrap_license = wrap_license != FALSE;
+
+  if (priv->wrap_license != wrap_license)
+    {
+       priv->wrap_license = wrap_license;
+
+       g_object_notify (G_OBJECT (about), "wrap-license");
+    }
+}
+
+/**
+ * mate_about_dialog_get_website:
+ * @about: a #MateAboutDialog
+ *
+ * Returns the website URL.
+ *
+ * Return value: The website URL. The string is owned by the about
+ *  dialog and must not be modified.
+ *
+ * Since: 1.9
+ */
+const gchar *
+mate_about_dialog_get_website (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv;
+
+  g_return_val_if_fail (MATE_IS_ABOUT_DIALOG (about), NULL);
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  return priv->website_url;
+}
+
+/**
+ * mate_about_dialog_set_website:
+ * @about: a #MateAboutDialog
+ * @website: (allow-none): a URL string starting with "http://"
+ *
+ * Sets the URL to use for the website link.
+ *
+ * Since: 1.9
+ */
+void
+mate_about_dialog_set_website (MateAboutDialog *about,
+                              const gchar    *website)
+{
+  MateAboutDialogPrivate *priv;
+  gchar *tmp;
+
+  g_return_if_fail (MATE_IS_ABOUT_DIALOG (about));
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  tmp = priv->website_url;
+  priv->website_url = g_strdup (website);
+  g_free (tmp);
+
+  update_website (about);
+
+  g_object_notify (G_OBJECT (about), "website");
+}
+
+/**
+ * mate_about_dialog_get_website_label:
+ * @about: a #MateAboutDialog
+ *
+ * Returns the label used for the website link.
+ *
+ * Return value: The label used for the website link. The string is
+ *     owned by the about dialog and must not be modified.
+ *
+ * Since: 1.9
+ */
+const gchar *
+mate_about_dialog_get_website_label (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv;
+
+  g_return_val_if_fail (MATE_IS_ABOUT_DIALOG (about), NULL);
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  return priv->website_text;
+}
+
+/**
+ * mate_about_dialog_set_website_label:
+ * @about: a #MateAboutDialog
+ * @website_label: the label used for the website link
+ *
+ * Sets the label to be used for the website link.
+ * It defaults to the website URL.
+ *
+ * Since: 1.9
+ */
+void
+mate_about_dialog_set_website_label (MateAboutDialog *about,
+                                    const gchar    *website_label)
+{
+  MateAboutDialogPrivate *priv;
+  gchar *tmp;
+
+  g_return_if_fail (MATE_IS_ABOUT_DIALOG (about));
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  tmp = priv->website_text;
+  priv->website_text = g_strdup (website_label);
+  g_free (tmp);
+
+  update_website (about);
+
+  g_object_notify (G_OBJECT (about), "website-label");
+}
+
+/**
+ * mate_about_dialog_get_authors:
+ * @about: a #MateAboutDialog
+ *
+ * Returns the string which are displayed in the authors tab
+ * of the secondary credits dialog.
+ *
+ * Return value: (array zero-terminated=1) (transfer none): A
+ *  %NULL-terminated string array containing the authors. The array is
+ *  owned by the about dialog and must not be modified.
+ *
+ * Since: 1.9
+ */
+const gchar * const *
+mate_about_dialog_get_authors (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv;
+
+  g_return_val_if_fail (MATE_IS_ABOUT_DIALOG (about), NULL);
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  return (const gchar * const *) priv->authors;
+}
+
+static void
+update_credits_button_visibility (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv = about->private_data;
+  gboolean show;
+
+  show = priv->authors != NULL ||
+         priv->documenters != NULL ||
+         priv->artists != NULL ||
+         (priv->translator_credits != NULL &&
+          strcmp (priv->translator_credits, "translator_credits") &&
+          strcmp (priv->translator_credits, "translator-credits"));
+  if (show)
+    gtk_widget_show (priv->credits_button);
+  else
+    gtk_widget_hide (priv->credits_button);
+}
+
+/**
+ * mate_about_dialog_set_authors:
+ * @about: a #MateAboutDialog
+ * @authors: a %NULL-terminated array of strings
+ *
+ * Sets the strings which are displayed in the authors tab
+ * of the secondary credits dialog.
+ *
+ * Since: 1.9
+ */
+void
+mate_about_dialog_set_authors (MateAboutDialog  *about,
+                              const gchar    **authors)
+{
+  MateAboutDialogPrivate *priv;
+  gchar **tmp;
+
+  g_return_if_fail (MATE_IS_ABOUT_DIALOG (about));
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  tmp = priv->authors;
+  priv->authors = g_strdupv ((gchar **)authors);
+  g_strfreev (tmp);
+
+  update_credits_button_visibility (about);
+
+  g_object_notify (G_OBJECT (about), "authors");
+}
+
+/**
+ * mate_about_dialog_get_documenters:
+ * @about: a #MateAboutDialog
+ *
+ * Returns the string which are displayed in the documenters
+ * tab of the secondary credits dialog.
+ *
+ * Return value: (array zero-terminated=1) (transfer none): A
+ *  %NULL-terminated string array containing the documenters. The
+ *  array is owned by the about dialog and must not be modified.
+ *
+ * Since: 1.9
+ */
+const gchar * const *
+mate_about_dialog_get_documenters (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv;
+
+  g_return_val_if_fail (MATE_IS_ABOUT_DIALOG (about), NULL);
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  return (const gchar * const *)priv->documenters;
+}
+
+/**
+ * mate_about_dialog_set_documenters:
+ * @about: a #MateAboutDialog
+ * @documenters: a %NULL-terminated array of strings
+ *
+ * Sets the strings which are displayed in the documenters tab
+ * of the secondary credits dialog.
+ *
+ * Since: 1.9
+ */
+void
+mate_about_dialog_set_documenters (MateAboutDialog *about,
+                                  const gchar   **documenters)
+{
+  MateAboutDialogPrivate *priv;
+  gchar **tmp;
+
+  g_return_if_fail (MATE_IS_ABOUT_DIALOG (about));
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  tmp = priv->documenters;
+  priv->documenters = g_strdupv ((gchar **)documenters);
+  g_strfreev (tmp);
+
+  update_credits_button_visibility (about);
+
+  g_object_notify (G_OBJECT (about), "documenters");
+}
+
+/**
+ * mate_about_dialog_get_artists:
+ * @about: a #MateAboutDialog
+ *
+ * Returns the string which are displayed in the artists tab
+ * of the secondary credits dialog.
+ *
+ * Return value: (array zero-terminated=1) (transfer none): A
+ *  %NULL-terminated string array containing the artists. The array is
+ *  owned by the about dialog and must not be modified.
+ *
+ * Since: 1.9
+ */
+const gchar * const *
+mate_about_dialog_get_artists (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv;
+
+  g_return_val_if_fail (MATE_IS_ABOUT_DIALOG (about), NULL);
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  return (const gchar * const *)priv->artists;
+}
+
+/**
+ * mate_about_dialog_set_artists:
+ * @about: a #MateAboutDialog
+ * @artists: a %NULL-terminated array of strings
+ *
+ * Sets the strings which are displayed in the artists tab
+ * of the secondary credits dialog.
+ *
+ * Since: 1.9
+ */
+void
+mate_about_dialog_set_artists (MateAboutDialog *about,
+                              const gchar   **artists)
+{
+  MateAboutDialogPrivate *priv;
+  gchar **tmp;
+
+  g_return_if_fail (MATE_IS_ABOUT_DIALOG (about));
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  tmp = priv->artists;
+  priv->artists = g_strdupv ((gchar **)artists);
+  g_strfreev (tmp);
+
+  update_credits_button_visibility (about);
+
+  g_object_notify (G_OBJECT (about), "artists");
+}
+
+/**
+ * mate_about_dialog_get_translator_credits:
+ * @about: a #MateAboutDialog
+ *
+ * Returns the translator credits string which is displayed
+ * in the translators tab of the secondary credits dialog.
+ *
+ * Return value: The translator credits string. The string is
+ *   owned by the about dialog and must not be modified.
+ *
+ * Since: 1.9
+ */
+const gchar *
+mate_about_dialog_get_translator_credits (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv;
+
+  g_return_val_if_fail (MATE_IS_ABOUT_DIALOG (about), NULL);
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  return priv->translator_credits;
+}
+
+/**
+ * mate_about_dialog_set_translator_credits:
+ * @about: a #MateAboutDialog
+ * @translator_credits: (allow-none): the translator credits
+ *
+ * Sets the translator credits string which is displayed in
+ * the translators tab of the secondary credits dialog.
+ *
+ * The intended use for this string is to display the translator
+ * of the language which is currently used in the user interface.
+ * Using gettext(), a simple way to achieve that is to mark the
+ * string for translation:
+ * |[
+ *  mate_about_dialog_set_translator_credits (about, _("translator-credits"));
+ * ]|
+ * It is a good idea to use the customary msgid "translator-credits" for this
+ * purpose, since translators will already know the purpose of that msgid, and
+ * since #MateAboutDialog will detect if "translator-credits" is untranslated
+ * and hide the tab.
+ *
+ * Since: 1.9
+ */
+void
+mate_about_dialog_set_translator_credits (MateAboutDialog *about,
+                                         const gchar    *translator_credits)
+{
+  MateAboutDialogPrivate *priv;
+  gchar *tmp;
+
+  g_return_if_fail (MATE_IS_ABOUT_DIALOG (about));
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  tmp = priv->translator_credits;
+  priv->translator_credits = g_strdup (translator_credits);
+  g_free (tmp);
+
+  update_credits_button_visibility (about);
+
+  g_object_notify (G_OBJECT (about), "translator-credits");
+}
+
+/**
+ * mate_about_dialog_get_logo:
+ * @about: a #MateAboutDialog
+ *
+ * Returns the pixbuf displayed as logo in the about dialog.
+ *
+ * Return value: (transfer none): the pixbuf displayed as logo. The
+ *   pixbuf is owned by the about dialog. If you want to keep a
+ *   reference to it, you have to call g_object_ref() on it.
+ *
+ * Since: 1.9
+ */
+GdkPixbuf *
+mate_about_dialog_get_logo (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv;
+
+  g_return_val_if_fail (MATE_IS_ABOUT_DIALOG (about), NULL);
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  if (gtk_image_get_storage_type (GTK_IMAGE (priv->logo_image)) == GTK_IMAGE_PIXBUF)
+    return gtk_image_get_pixbuf (GTK_IMAGE (priv->logo_image));
+  else
+    return NULL;
+}
+
+static GtkIconSet *
+icon_set_new_from_pixbufs (GList *pixbufs)
+{
+  GtkIconSet *icon_set = gtk_icon_set_new ();
+
+  for (; pixbufs; pixbufs = pixbufs->next)
+    {
+      GdkPixbuf *pixbuf = GDK_PIXBUF (pixbufs->data);
+
+      GtkIconSource *icon_source = gtk_icon_source_new ();
+      gtk_icon_source_set_pixbuf (icon_source, pixbuf);
+      gtk_icon_set_add_source (icon_set, icon_source);
+      gtk_icon_source_free (icon_source);
+    }
+
+  return icon_set;
+}
+
+/**
+ * mate_about_dialog_set_logo:
+ * @about: a #MateAboutDialog
+ * @logo: (allow-none): a #GdkPixbuf, or %NULL
+ *
+ * Sets the pixbuf to be displayed as logo in the about dialog.
+ * If it is %NULL, the default window icon set with
+ * gtk_window_set_default_icon() will be used.
+ *
+ * Since: 1.9
+ */
+void
+mate_about_dialog_set_logo (MateAboutDialog *about,
+                           GdkPixbuf      *logo)
+{
+  MateAboutDialogPrivate *priv;
+
+  g_return_if_fail (MATE_IS_ABOUT_DIALOG (about));
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  g_object_freeze_notify (G_OBJECT (about));
+
+  if (gtk_image_get_storage_type (GTK_IMAGE (priv->logo_image)) == GTK_IMAGE_ICON_NAME)
+    g_object_notify (G_OBJECT (about), "logo-icon-name");
+
+  if (logo != NULL)
+    gtk_image_set_from_pixbuf (GTK_IMAGE (priv->logo_image), logo);
+  else
+    {
+      GList *pixbufs = gtk_window_get_default_icon_list ();
+
+      if (pixbufs != NULL)
+        {
+          GtkIconSet *icon_set = icon_set_new_from_pixbufs (pixbufs);
+
+          gtk_image_set_from_icon_set (GTK_IMAGE (priv->logo_image),
+                                       icon_set, GTK_ICON_SIZE_DIALOG);
+
+          gtk_icon_set_unref (icon_set);
+          g_list_free (pixbufs);
+        }
+    }
+
+  g_object_notify (G_OBJECT (about), "logo");
+
+  g_object_thaw_notify (G_OBJECT (about));
+}
+
+/**
+ * mate_about_dialog_get_logo_icon_name:
+ * @about: a #MateAboutDialog
+ *
+ * Returns the icon name displayed as logo in the about dialog.
+ *
+ * Return value: the icon name displayed as logo. The string is
+ *   owned by the dialog. If you want to keep a reference
+ *   to it, you have to call g_strdup() on it.
+ *
+ * Since: 1.9
+ */
+const gchar *
+mate_about_dialog_get_logo_icon_name (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv;
+  const gchar *icon_name = NULL;
+
+  g_return_val_if_fail (MATE_IS_ABOUT_DIALOG (about), NULL);
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  if (gtk_image_get_storage_type (GTK_IMAGE (priv->logo_image)) == GTK_IMAGE_ICON_NAME)
+    gtk_image_get_icon_name (GTK_IMAGE (priv->logo_image), &icon_name, NULL);
+
+  return icon_name;
+}
+
+/**
+ * mate_about_dialog_set_logo_icon_name:
+ * @about: a #MateAboutDialog
+ * @icon_name: (allow-none): an icon name, or %NULL
+ *
+ * Sets the pixbuf to be displayed as logo in the about dialog.
+ * If it is %NULL, the default window icon set with
+ * gtk_window_set_default_icon() will be used.
+ *
+ * Since: 1.9
+ */
+void
+mate_about_dialog_set_logo_icon_name (MateAboutDialog *about,
+                                     const gchar    *icon_name)
+{
+  MateAboutDialogPrivate *priv;
+
+  g_return_if_fail (MATE_IS_ABOUT_DIALOG (about));
+
+  priv = (MateAboutDialogPrivate *)about->private_data;
+
+  g_object_freeze_notify (G_OBJECT (about));
+
+  if (gtk_image_get_storage_type (GTK_IMAGE (priv->logo_image)) == GTK_IMAGE_PIXBUF)
+    g_object_notify (G_OBJECT (about), "logo");
+
+  gtk_image_set_from_icon_name (GTK_IMAGE (priv->logo_image), icon_name,
+                                GTK_ICON_SIZE_DIALOG);
+  g_object_notify (G_OBJECT (about), "logo-icon-name");
+
+  g_object_thaw_notify (G_OBJECT (about));
+}
+
+static void
+follow_if_link (MateAboutDialog *about,
+                GtkTextView    *text_view,
+                GtkTextIter    *iter)
+{
+  GSList *tags = NULL, *tagp = NULL;
+  MateAboutDialogPrivate *priv = (MateAboutDialogPrivate *)about->private_data;
+  gchar *uri = NULL;
+
+  tags = gtk_text_iter_get_tags (iter);
+  for (tagp = tags; tagp != NULL && !uri; tagp = tagp->next)
+    {
+      GtkTextTag *tag = tagp->data;
+
+      uri = g_object_get_data (G_OBJECT (tag), "uri");
+
+      if (uri && !g_slist_find_custom (priv->visited_links, uri, (GCompareFunc)strcmp))
+        {
+          GdkColor *style_visited_link_color;
+          GdkColor color;
+
+          gtk_widget_ensure_style (GTK_WIDGET (about));
+          gtk_widget_style_get (GTK_WIDGET (about),
+                                "visited-link-color", &style_visited_link_color,
+                                NULL);
+          if (style_visited_link_color)
+            {
+              color = *style_visited_link_color;
+              gdk_color_free (style_visited_link_color);
+            }
+          else
+            color = default_visited_link_color;
+
+          g_object_set (G_OBJECT (tag), "foreground-gdk", &color, NULL);
+
+          priv->visited_links = g_slist_prepend (priv->visited_links, g_strdup (uri));
+        }
+    }
+
+  if (tags)
+    g_slist_free (tags);
+}
+
+static gboolean
+text_view_key_press_event (GtkWidget      *text_view,
+                           GdkEventKey    *event,
+                           MateAboutDialog *about)
+{
+  GtkTextIter iter;
+  GtkTextBuffer *buffer;
+
+  switch (event->keyval)
+    {
+      case GDK_Return:
+      case GDK_ISO_Enter:
+      case GDK_KP_Enter:
+        buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text_view));
+        gtk_text_buffer_get_iter_at_mark (buffer, &iter,
+                                          gtk_text_buffer_get_insert (buffer));
+        follow_if_link (about, GTK_TEXT_VIEW (text_view), &iter);
+        break;
+
+      default:
+        break;
+    }
+
+  return FALSE;
+}
+
+static gboolean
+text_view_event_after (GtkWidget      *text_view,
+                       GdkEvent       *event,
+                       MateAboutDialog *about)
+{
+  GtkTextIter start, end, iter;
+  GtkTextBuffer *buffer;
+  GdkEventButton *button_event;
+  gint x, y;
+
+  if (event->type != GDK_BUTTON_RELEASE)
+    return FALSE;
+
+  button_event = (GdkEventButton *)event;
+
+  if (button_event->button != 1)
+    return FALSE;
+
+  buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text_view));
+
+  /* we shouldn't follow a link if the user has selected something */
+  gtk_text_buffer_get_selection_bounds (buffer, &start, &end);
+  if (gtk_text_iter_get_offset (&start) != gtk_text_iter_get_offset (&end))
+    return FALSE;
+
+  gtk_text_view_window_to_buffer_coords (GTK_TEXT_VIEW (text_view),
+                                         GTK_TEXT_WINDOW_WIDGET,
+                                         button_event->x, button_event->y, &x, &y);
+
+  gtk_text_view_get_iter_at_location (GTK_TEXT_VIEW (text_view), &iter, x, y);
+
+  follow_if_link (about, GTK_TEXT_VIEW (text_view), &iter);
+
+  return FALSE;
+}
+
+static void
+set_cursor_if_appropriate (MateAboutDialog *about,
+                           GtkTextView    *text_view,
+                           gint            x,
+                           gint            y)
+{
+  MateAboutDialogPrivate *priv = (MateAboutDialogPrivate *)about->private_data;
+  GSList *tags = NULL, *tagp = NULL;
+  GtkTextIter iter;
+  gboolean hovering_over_link = FALSE;
+
+  gtk_text_view_get_iter_at_location (text_view, &iter, x, y);
+
+  tags = gtk_text_iter_get_tags (&iter);
+  for (tagp = tags;  tagp != NULL;  tagp = tagp->next)
+    {
+      GtkTextTag *tag = tagp->data;
+      gchar *uri = g_object_get_data (G_OBJECT (tag), "uri");
+
+      if (uri != NULL)
+        {
+          hovering_over_link = TRUE;
+          break;
+        }
+    }
+
+  if (hovering_over_link != priv->hovering_over_link)
+    {
+      priv->hovering_over_link = hovering_over_link;
+
+      if (hovering_over_link)
+        gdk_window_set_cursor (gtk_text_view_get_window (text_view, GTK_TEXT_WINDOW_TEXT), priv->hand_cursor);
+      else
+        gdk_window_set_cursor (gtk_text_view_get_window (text_view, GTK_TEXT_WINDOW_TEXT), priv->regular_cursor);
+    }
+
+  if (tags)
+    g_slist_free (tags);
+}
+
+static gboolean
+text_view_motion_notify_event (GtkWidget *text_view,
+                               GdkEventMotion *event,
+                               MateAboutDialog *about)
+{
+  gint x, y;
+
+  gtk_text_view_window_to_buffer_coords (GTK_TEXT_VIEW (text_view),
+                                         GTK_TEXT_WINDOW_WIDGET,
+                                         event->x, event->y, &x, &y);
+
+  set_cursor_if_appropriate (about, GTK_TEXT_VIEW (text_view), x, y);
+
+  gdk_event_request_motions (event);
+
+  return FALSE;
+}
+
+
+static gboolean
+text_view_visibility_notify_event (GtkWidget          *text_view,
+                                   GdkEventVisibility *event,
+                                   MateAboutDialog     *about)
+{
+  gint wx, wy, bx, by;
+
+  gdk_window_get_pointer (gtk_widget_get_window (text_view), &wx, &wy, NULL);
+
+  gtk_text_view_window_to_buffer_coords (GTK_TEXT_VIEW (text_view),
+                                         GTK_TEXT_WINDOW_WIDGET,
+                                         wx, wy, &bx, &by);
+
+  set_cursor_if_appropriate (about, GTK_TEXT_VIEW (text_view), bx, by);
+
+  return FALSE;
+}
+
+static GtkWidget *
+text_view_new (MateAboutDialog  *about,
+               GtkWidget       *dialog,
+               gchar          **strings,
+               GtkWrapMode      wrap_mode)
+{
+  gchar **p;
+  gchar *q0, *q1, *q2, *r1, *r2;
+  GtkWidget *view;
+  GtkTextView *text_view;
+  GtkTextBuffer *buffer;
+  GdkColor *style_link_color;
+  GdkColor *style_visited_link_color;
+  GdkColor color;
+  GdkColor link_color;
+  GdkColor visited_link_color;
+  MateAboutDialogPrivate *priv = (MateAboutDialogPrivate *)about->private_data;
+
+  gtk_widget_ensure_style (GTK_WIDGET (about));
+  gtk_widget_style_get (GTK_WIDGET (about),
+                        "link-color", &style_link_color,
+                        "visited-link-color", &style_visited_link_color,
+                        NULL);
+  if (style_link_color)
+    {
+      link_color = *style_link_color;
+      gdk_color_free (style_link_color);
+    }
+  else
+    link_color = default_link_color;
+
+  if (style_visited_link_color)
+    {
+      visited_link_color = *style_visited_link_color;
+      gdk_color_free (style_visited_link_color);
+    }
+  else
+    visited_link_color = default_visited_link_color;
+
+  view = gtk_text_view_new ();
+  text_view = GTK_TEXT_VIEW (view);
+  buffer = gtk_text_view_get_buffer (text_view);
+  gtk_text_view_set_cursor_visible (text_view, FALSE);
+  gtk_text_view_set_editable (text_view, FALSE);
+  gtk_text_view_set_wrap_mode (text_view, wrap_mode);
+
+  gtk_text_view_set_left_margin (text_view, 8);
+  gtk_text_view_set_right_margin (text_view, 8);
+
+  g_signal_connect (view, "key-press-event",
+                    G_CALLBACK (text_view_key_press_event), about);
+  g_signal_connect (view, "event-after",
+                    G_CALLBACK (text_view_event_after), about);
+  g_signal_connect (view, "motion-notify-event",
+                    G_CALLBACK (text_view_motion_notify_event), about);
+  g_signal_connect (view, "visibility-notify-event",
+                    G_CALLBACK (text_view_visibility_notify_event), about);
+
+  if (strings == NULL)
+    {
+      gtk_widget_hide (view);
+      return view;
+    }
+
+  for (p = strings; *p; p++)
+    {
+      q0  = *p;
+      while (*q0)
+        {
+          q1 = strchr (q0, '<');
+          q2 = q1 ? strchr (q1, '>') : NULL;
+          r1 = strstr (q0, "http://");
+          if (r1)
+            {
+              r2 = strpbrk (r1, " \n\t");
+              if (!r2)
+                r2 = strchr (r1, '\0');
+            }
+          else
+            r2 = NULL;
+
+          if (r1 && r2 && (!q1 || !q2 || (r1 < q1)))
+            {
+              q1 = r1;
+              q2 = r2;
+            }
+
+          if (q1 && q2)
+            {
+              GtkTextIter end;
+              gchar *link;
+              gchar *uri;
+              const gchar *link_type;
+              GtkTextTag *tag;
+
+              if (*q1 == '<')
+                {
+                  gtk_text_buffer_insert_at_cursor (buffer, q0, (q1 - q0) + 1);
+                  gtk_text_buffer_get_end_iter (buffer, &end);
+                  q1++;
+                  link_type = "email";
+                }
+              else
+                {
+                  gtk_text_buffer_insert_at_cursor (buffer, q0, q1 - q0);
+                  gtk_text_buffer_get_end_iter (buffer, &end);
+                  link_type = "uri";
+                }
+
+              q0 = q2;
+
+              link = g_strndup (q1, q2 - q1);
+
+              if (g_slist_find_custom (priv->visited_links, link, (GCompareFunc)strcmp))
+                color = visited_link_color;
+              else
+                color = link_color;
+
+              tag = gtk_text_buffer_create_tag (buffer, NULL,
+                                                "foreground-gdk", &color,
+                                                "underline", PANGO_UNDERLINE_SINGLE,
+                                                NULL);
+              if (strcmp (link_type, "email") == 0)
+                {
+                  gchar *escaped;
+
+                  escaped = g_uri_escape_string (link, NULL, FALSE);
+                  uri = g_strconcat ("mailto:", escaped, NULL);
+                  g_free (escaped);
+                }
+              else
+                {
+                  uri = g_strdup (link);
+                }
+              g_object_set_data_full (G_OBJECT (tag), "uri", uri, g_free);
+              gtk_text_buffer_insert_with_tags (buffer, &end, link, -1, tag, NULL);
+
+              g_free (link);
+            }
+          else
+            {
+              gtk_text_buffer_insert_at_cursor (buffer, q0, -1);
+              break;
+            }
+        }
+
+      if (p[1])
+        gtk_text_buffer_insert_at_cursor (buffer, "\n", 1);
+    }
+
+  gtk_widget_show (view);
+  return view;
+}
+
+static void
+add_credits_page (MateAboutDialog *about,
+                  GtkWidget      *credits_dialog,
+                  GtkWidget      *notebook,
+                  gchar          *title,
+                  gchar         **people)
+{
+  GtkWidget *sw, *view;
+
+  view = text_view_new (about, credits_dialog, people, GTK_WRAP_NONE);
+
+  sw = gtk_scrolled_window_new (NULL, NULL);
+  gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw),
+                                       GTK_SHADOW_IN);
+  gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
+                                  GTK_POLICY_AUTOMATIC,
+                                  GTK_POLICY_AUTOMATIC);
+  gtk_container_add (GTK_CONTAINER (sw), view);
+
+  gtk_notebook_append_page (GTK_NOTEBOOK (notebook),
+                            sw, gtk_label_new (title));
+}
+
+static void
+display_credits_dialog (GtkWidget *button,
+                        gpointer   data)
+{
+  MateAboutDialog *about = (MateAboutDialog *)data;
+  MateAboutDialogPrivate *priv = (MateAboutDialogPrivate *)about->private_data;
+  GtkWidget *dialog, *notebook;
+  GtkDialog *credits_dialog;
+
+  if (priv->credits_dialog != NULL)
+    {
+      gtk_window_present (GTK_WINDOW (priv->credits_dialog));
+      return;
+    }
+
+  dialog = gtk_dialog_new_with_buttons (_("Credits"),
+                                        GTK_WINDOW (about),
+                                        GTK_DIALOG_DESTROY_WITH_PARENT,
+                                        GTK_STOCK_CLOSE, GTK_RESPONSE_CANCEL,
+                                        NULL);
+  credits_dialog = GTK_DIALOG (dialog);
+  gtk_container_set_border_width (GTK_CONTAINER (credits_dialog), 5);
+  gtk_box_set_spacing (GTK_BOX (gtk_dialog_get_content_area (credits_dialog)), 2); /* 2 * 5 + 2 = 12 */
+  gtk_container_set_border_width (GTK_CONTAINER (gtk_dialog_get_action_area (credits_dialog)), 5);
+
+  priv->credits_dialog = dialog;
+  gtk_window_set_default_size (GTK_WINDOW (dialog), 360, 260);
+  gtk_dialog_set_default_response (credits_dialog, GTK_RESPONSE_CANCEL);
+
+  gtk_window_set_modal (GTK_WINDOW (dialog),
+                        gtk_window_get_modal (GTK_WINDOW (about)));
+
+  g_signal_connect (dialog, "response",
+                    G_CALLBACK (gtk_widget_destroy), dialog);
+  g_signal_connect (dialog, "destroy",
+                    G_CALLBACK (gtk_widget_destroyed),
+                    &(priv->credits_dialog));
+
+  notebook = gtk_notebook_new ();
+  gtk_container_set_border_width (GTK_CONTAINER (notebook), 5);
+  gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))), notebook, TRUE, TRUE, 0);
+
+  if (priv->authors != NULL)
+    add_credits_page (about, dialog, notebook, _("Written by"), priv->authors);
+
+  if (priv->documenters != NULL)
+    add_credits_page (about, dialog, notebook, _("Documented by"), priv->documenters);
+
+  /* Don't show an untranslated gettext msgid */
+  if (priv->translator_credits != NULL &&
+      strcmp (priv->translator_credits, "translator_credits") != 0 &&
+      strcmp (priv->translator_credits, "translator-credits") != 0)
+    {
+      gchar *translators[2];
+
+      translators[0] = priv->translator_credits;
+      translators[1] = NULL;
+
+      add_credits_page (about, dialog, notebook, _("Translated by"), translators);
+    }
+
+  if (priv->artists != NULL)
+    add_credits_page (about, dialog, notebook, _("Artwork by"), priv->artists);
+
+  gtk_widget_show_all (dialog);
+}
+
+static void
+set_policy (GtkWidget *sw)
+{
+  gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
+                                  GTK_POLICY_AUTOMATIC,
+                                  GTK_POLICY_AUTOMATIC);
+}
+
+static void
+display_license_dialog (GtkWidget *button,
+                        gpointer   data)
+{
+  MateAboutDialog *about = (MateAboutDialog *)data;
+  MateAboutDialogPrivate *priv = (MateAboutDialogPrivate *)about->private_data;
+  GtkWidget *dialog, *view, *sw;
+  GtkDialog *licence_dialog;
+  gchar *strings[2];
+
+  if (priv->license_dialog != NULL)
+    {
+      gtk_window_present (GTK_WINDOW (priv->license_dialog));
+      return;
+    }
+
+  dialog = gtk_dialog_new_with_buttons (_("License"),
+                                        GTK_WINDOW (about),
+                                        GTK_DIALOG_DESTROY_WITH_PARENT,
+                                        GTK_STOCK_CLOSE, GTK_RESPONSE_CANCEL,
+                                        NULL);
+  licence_dialog = GTK_DIALOG (dialog);
+  gtk_container_set_border_width (GTK_CONTAINER (licence_dialog), 5);
+  gtk_box_set_spacing (GTK_BOX (gtk_dialog_get_content_area (licence_dialog)), 2); /* 2 * 5 + 2 = 12 */
+  gtk_container_set_border_width (GTK_CONTAINER (gtk_dialog_get_action_area (licence_dialog)), 5);
+
+  priv->license_dialog = dialog;
+  gtk_window_set_default_size (GTK_WINDOW (dialog), 420, 320);
+  gtk_dialog_set_default_response (licence_dialog, GTK_RESPONSE_CANCEL);
+
+  gtk_window_set_modal (GTK_WINDOW (dialog),
+                        gtk_window_get_modal (GTK_WINDOW (about)));
+
+  g_signal_connect (dialog, "response",
+                    G_CALLBACK (gtk_widget_destroy), dialog);
+  g_signal_connect (dialog, "destroy",
+                    G_CALLBACK (gtk_widget_destroyed),
+                    &(priv->license_dialog));
+
+  sw = gtk_scrolled_window_new (NULL, NULL);
+  gtk_container_set_border_width (GTK_CONTAINER (sw), 5);
+  gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw),
+                                       GTK_SHADOW_IN);
+  gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
+                                  GTK_POLICY_NEVER,
+                                  GTK_POLICY_AUTOMATIC);
+  g_signal_connect (sw, "map", G_CALLBACK (set_policy), NULL);
+  gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))), sw, TRUE, TRUE, 0);
+
+  strings[0] = priv->license;
+  strings[1] = NULL;
+  view = text_view_new (about, dialog, strings,
+                        priv->wrap_license ? GTK_WRAP_WORD : GTK_WRAP_NONE);
+
+  gtk_container_add (GTK_CONTAINER (sw), view);
+
+  gtk_widget_show_all (dialog);
+}
+
+/**
+ * mate_about_dialog_new:
+ *
+ * Creates a new #MateAboutDialog.
+ *
+ * Returns: a newly created #MateAboutDialog
+ *
+ * Since: 1.9
+ */
+GtkWidget *
+mate_about_dialog_new (void)
+{
+  MateAboutDialog *dialog = g_object_new (MATE_TYPE_ABOUT_DIALOG, NULL);
+
+  return GTK_WIDGET (dialog);
+}
+
+static void
+close_cb (MateAboutDialog *about)
+{
+  MateAboutDialogPrivate *priv = (MateAboutDialogPrivate *)about->private_data;
+
+  if (priv->license_dialog != NULL)
+    {
+      gtk_widget_destroy (priv->license_dialog);
+      priv->license_dialog = NULL;
+    }
+
+  if (priv->credits_dialog != NULL)
+    {
+      gtk_widget_destroy (priv->credits_dialog);
+      priv->credits_dialog = NULL;
+    }
+
+  gtk_widget_hide (GTK_WIDGET (about));
+
+}
+
+/**
+ * gtk_show_about_dialog:
+ * @parent: (allow-none): transient parent, or %NULL for none
+ * @first_property_name: the name of the first property
+ * @Varargs: value of first property, followed by more properties, %NULL-terminated
+ *
+ * This is a convenience function for showing an application's about box.
+ * The constructed dialog is associated with the parent window and
+ * reused for future invocations of this function.
+ *
+ * Since: 1.9
+ */
+void
+mate_show_about_dialog (GtkWindow   *parent,
+                        const gchar *first_property_name,
+                        ...)
+{
+  static GtkWidget *global_about_dialog = NULL;
+  GtkWidget *dialog = NULL;
+  va_list var_args;
+
+  if (parent)
+    dialog = g_object_get_data (G_OBJECT (parent), "gtk-about-dialog");
+  else
+    dialog = global_about_dialog;
+
+  if (!dialog)
+    {
+      dialog = mate_about_dialog_new ();
+
+      g_object_ref_sink (dialog);
+
+      g_signal_connect (dialog, "delete-event",
+                        G_CALLBACK (gtk_widget_hide_on_delete), NULL);
+
+      /* Close dialog on user response */
+      g_signal_connect (dialog, "response",
+                        G_CALLBACK (close_cb), NULL);
+
+      va_start (var_args, first_property_name);
+      g_object_set_valist (G_OBJECT (dialog), first_property_name, var_args);
+      va_end (var_args);
+
+      if (parent)
+        {
+          gtk_window_set_transient_for (GTK_WINDOW (dialog), parent);
+          gtk_window_set_destroy_with_parent (GTK_WINDOW (dialog), TRUE);
+          g_object_set_data_full (G_OBJECT (parent),
+                                  "gtk-about-dialog",
+                                  dialog, g_object_unref);
+        }
+      else
+        global_about_dialog = dialog;
+
+    }
+
+  gtk_window_present (GTK_WINDOW (dialog));
+}
diff --git a/libmate-desktop/mate-aboutdialog.h b/libmate-desktop/mate-aboutdialog.h
new file mode 100644
index 0000000..efc5bd1
--- /dev/null
+++ b/libmate-desktop/mate-aboutdialog.h
@@ -0,0 +1,125 @@
+/*
+ * mate-aboutdialog.h: Traditional GTK+ About Dialog
+ *
+ * Copyright (C) 2001 CodeFactory AB
+ * Copyright (C) 2001 Anders Carlsson <[email protected]>
+ * Copyright (C) 2003, 2004 Matthias Clasen <[email protected]>
+ * Copyright (C) 2014 Stefano Karapetsas <[email protected]>
+ *
+ * This file is part of the Mate Library.
+ *
+ * The Mate Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Mate Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with the Mate Library; see the file COPYING.LIB.  If not,
+ * write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ *
+ * Author: Stefano Karapetsas <[email protected]>
+*/
+
+#ifndef __MATE_ABOUT_DIALOG_H__
+#define __MATE_ABOUT_DIALOG_H__
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+#define MATE_TYPE_ABOUT_DIALOG            (mate_about_dialog_get_type ())
+#define MATE_ABOUT_DIALOG(object)         (G_TYPE_CHECK_INSTANCE_CAST ((object), MATE_TYPE_ABOUT_DIALOG, MateAboutDialog))
+#define MATE_ABOUT_DIALOG_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), MATE_TYPE_ABOUT_DIALOG, MateAboutDialogClass))
+#define MATE_IS_ABOUT_DIALOG(object)      (G_TYPE_CHECK_INSTANCE_TYPE ((object), MATE_TYPE_ABOUT_DIALOG))
+#define MATE_IS_ABOUT_DIALOG_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), MATE_TYPE_ABOUT_DIALOG))
+#define MATE_ABOUT_DIALOG_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), MATE_TYPE_ABOUT_DIALOG, MateAboutDialogClass))
+
+typedef struct _MateAboutDialog        MateAboutDialog;
+typedef struct _MateAboutDialogClass   MateAboutDialogClass;
+
+/**
+ * MateAboutDialog:
+ *
+ * The <structname>MateAboutDialog</structname> struct contains
+ * only private fields and should not be directly accessed.
+ */
+struct _MateAboutDialog 
+{
+  GtkDialog parent_instance;
+
+  /*< private >*/
+  GtkAboutDialogPrivate *private_data;
+};
+
+struct _MateAboutDialogClass
+{
+  GtkDialogClass parent_class;
+
+  /* Padding for future expansion */
+  void (*_gtk_reserved1) (void);
+  void (*_gtk_reserved2) (void);
+  void (*_gtk_reserved3) (void);
+};
+
+GType                  mate_about_dialog_get_type               (void) G_GNUC_CONST;
+GtkWidget             *mate_about_dialog_new                    (void);
+void                   mate_show_about_dialog                   (GtkWindow       *parent,
+                                                                 const gchar     *first_property_name,
+                                                                 ...) G_GNUC_NULL_TERMINATED;
+
+const gchar *          mate_about_dialog_get_program_name       (MateAboutDialog  *about);
+void                   mate_about_dialog_set_program_name       (MateAboutDialog  *about,
+                                                                 const gchar      *name);
+const gchar *          mate_about_dialog_get_version            (MateAboutDialog  *about);
+void                   mate_about_dialog_set_version            (MateAboutDialog  *about,
+                                                                 const gchar      *version);
+const gchar *          mate_about_dialog_get_copyright          (MateAboutDialog  *about);
+void                   mate_about_dialog_set_copyright          (MateAboutDialog  *about,
+                                                                 const gchar      *copyright);
+const gchar *          mate_about_dialog_get_comments           (MateAboutDialog  *about);
+void                   mate_about_dialog_set_comments           (MateAboutDialog  *about,
+                                                                 const gchar      *comments);
+const gchar *          mate_about_dialog_get_license            (MateAboutDialog  *about);
+void                   mate_about_dialog_set_license            (MateAboutDialog  *about,
+                                                                 const gchar      *license);
+
+gboolean               mate_about_dialog_get_wrap_license       (MateAboutDialog  *about);
+void                   mate_about_dialog_set_wrap_license       (MateAboutDialog  *about,
+                                                                 gboolean          wrap_license);
+
+const gchar *          mate_about_dialog_get_website            (MateAboutDialog  *about);
+void                   mate_about_dialog_set_website            (MateAboutDialog  *about,
+                                                                 const gchar      *website);
+const gchar *          mate_about_dialog_get_website_label      (MateAboutDialog  *about);
+void                   mate_about_dialog_set_website_label      (MateAboutDialog  *about,
+                                                                 const gchar      *website_label);
+const gchar* const *   mate_about_dialog_get_authors            (MateAboutDialog  *about);
+void                   mate_about_dialog_set_authors            (MateAboutDialog  *about,
+                                                                 const gchar     **authors);
+const gchar* const *   mate_about_dialog_get_documenters        (MateAboutDialog  *about);
+void                   mate_about_dialog_set_documenters        (MateAboutDialog  *about,
+                                                                 const gchar     **documenters);
+const gchar* const *   mate_about_dialog_get_artists            (MateAboutDialog  *about);
+void                   mate_about_dialog_set_artists            (MateAboutDialog  *about,
+                                                                 const gchar     **artists);
+const gchar *          mate_about_dialog_get_translator_credits (MateAboutDialog  *about);
+void                   mate_about_dialog_set_translator_credits (MateAboutDialog  *about,
+                                                                 const gchar      *translator_credits);
+GdkPixbuf             *mate_about_dialog_get_logo               (MateAboutDialog  *about);
+void                   mate_about_dialog_set_logo               (MateAboutDialog  *about,
+                                                                 GdkPixbuf        *logo);
+const gchar *          mate_about_dialog_get_logo_icon_name     (MateAboutDialog  *about);
+void                   mate_about_dialog_set_logo_icon_name     (MateAboutDialog  *about,
+                                                                 const gchar      *icon_name);
+
+G_END_DECLS
+
+#endif /* __MATE_ABOUT_DIALOG_H__ */
+
+
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 0037854..7dd6d65 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -6,6 +6,7 @@ mate-about/mate-about.h
 # When adding a file here, make sure that the entry point in the API of this
 # file calls _mate_desktop_init_i18n ()
 libmate-desktop/display-name.c
+libmate-desktop/mate-aboutdialog.c
 libmate-desktop/mate-desktop-item.c
 libmate-desktop/mate-desktop-utils.c
 libmate-desktop/mate-rr.c