static void
shell_show_overview_page (GnomeControlCenter *center)
{
  GnomeControlCenterPrivate *priv = center->priv;

  notebook_select_page (priv->notebook, priv->scrolled_window);

  if (priv->current_panel)
    notebook_remove_page (priv->notebook, priv->current_panel);
  priv->current_panel = NULL;

  /* clear the search text */
  g_free (priv->filter_string);
  priv->filter_string = g_strdup ("");
  gtk_entry_set_text (GTK_ENTRY (priv->search_entry), "");
  gtk_widget_grab_focus (priv->search_entry);

  gtk_lock_button_set_permission (GTK_LOCK_BUTTON (priv->lock_button), NULL);

  /* reset window title and icon */
  gtk_window_set_role (GTK_WINDOW (priv->window), NULL);
  gtk_window_set_title (GTK_WINDOW (priv->window), priv->default_window_title);
  gtk_window_set_default_icon_name (priv->default_window_icon);
  gtk_window_set_icon_name (GTK_WINDOW (priv->window),
                            priv->default_window_icon);

  cc_shell_set_active_panel (CC_SHELL (center), NULL);

  /* clear any custom widgets */
  _shell_remove_all_custom_widgets (priv);
}
static void
shell_show_overview_page (CinnamonControlCenter *center)
{
  CinnamonControlCenterPrivate *priv = center->priv;

  notebook_select_page (priv->notebook, priv->scrolled_window);

  if (priv->current_panel_box)
    notebook_remove_page (priv->notebook, priv->current_panel_box);
  priv->current_panel = NULL;
  priv->current_panel_box = NULL;

  if (priv->current_panel_id) {
    g_free (priv->current_panel_id);
    priv->current_panel_id = NULL;
  }

  /* clear the search text */
  g_free (priv->filter_string);
  priv->filter_string = g_strdup ("");

  gtk_lock_button_set_permission (GTK_LOCK_BUTTON (priv->lock_button), NULL);

  /* reset window title and icon */
  gtk_window_set_role (GTK_WINDOW (priv->window), NULL);
  gtk_window_set_title (GTK_WINDOW (priv->window), priv->default_window_title);
  gtk_window_set_default_icon_name (priv->default_window_icon);
  gtk_window_set_icon_name (GTK_WINDOW (priv->window),
                            priv->default_window_icon);

  cc_shell_set_active_panel (CC_SHELL (center), NULL);

  /* clear any custom widgets */
  _shell_remove_all_custom_widgets (priv);

  cc_shell_nav_bar_hide_detail_button (CC_SHELL_NAV_BAR (priv->nav_bar));
}
static gboolean
activate_panel (GnomeControlCenter *shell,
                const gchar        *id,
		const gchar       **argv,
                const gchar        *desktop_file,
                const gchar        *name,
                GIcon              *gicon)
{
  GnomeControlCenterPrivate *priv = shell->priv;
  GType panel_type = G_TYPE_INVALID;
  GList *panels, *l;
  GtkWidget *panel;
  GtkWidget *box;
  const gchar *icon_name;

  /* check if there is an plugin that implements this panel */
  panels = g_io_extension_point_get_extensions (priv->extension_point);

  if (!desktop_file)
    return FALSE;
  if (!id)
    return FALSE;

  for (l = panels; l != NULL; l = l->next)
    {
      GIOExtension *extension;
      const gchar *name;

      extension = l->data;

      name = g_io_extension_get_name (extension);

      if (!g_strcmp0 (name, id))
        {
          panel_type = g_io_extension_get_type (extension);
          break;
        }
    }

  if (panel_type == G_TYPE_INVALID)
    {
      g_warning ("Could not find the loadable module for panel '%s'", id);
      return FALSE;
    }

  /* create the panel plugin */
  panel = g_object_new (panel_type, "shell", shell, "argv", argv, NULL);
  cc_shell_set_active_panel (CC_SHELL (shell), CC_PANEL (panel));
  gtk_widget_show (panel);

  gtk_lock_button_set_permission (GTK_LOCK_BUTTON (priv->lock_button),
                                  cc_panel_get_permission (CC_PANEL (panel)));

  box = gtk_alignment_new (0, 0, 1, 1);
  gtk_alignment_set_padding (GTK_ALIGNMENT (box), 6, 6, 6, 6);

  gtk_container_add (GTK_CONTAINER (box), panel);

  gtk_widget_set_name (box, id);
  notebook_add_page (priv->notebook, box);

  /* switch to the new panel */
  gtk_widget_show (box);
  notebook_select_page (priv->notebook, box);

  /* set the title of the window */
  icon_name = get_icon_name_from_g_icon (gicon);
  gtk_window_set_role (GTK_WINDOW (priv->window), id);
  gtk_window_set_title (GTK_WINDOW (priv->window), name);
  gtk_window_set_default_icon_name (icon_name);
  gtk_window_set_icon_name (GTK_WINDOW (priv->window), icon_name);

  priv->current_panel = box;

  return TRUE;
}
static gboolean
activate_panel (GnomeControlCenter *shell,
                const gchar        *id,
		const gchar       **argv,
                const gchar        *desktop_file,
                const gchar        *name,
                GIcon              *gicon)
{
  GDesktopAppInfo     *appinfo;
  GdkAppLaunchContext *context;
  GdkScreen           *screen;
  GdkDisplay          *display;
  GError              *error;

  appinfo = g_desktop_app_info_new_from_filename (desktop_file);

  screen = gtk_widget_get_screen (shell->priv->window);
  display = gdk_screen_get_display (screen);
  context = gdk_display_get_app_launch_context (display);
  gdk_app_launch_context_set_screen (context, screen);
  gdk_app_launch_context_set_timestamp (context, gtk_get_current_event_time ());

  error = NULL;
  g_app_info_launch_uris (G_APP_INFO (appinfo), NULL,
                          (GAppLaunchContext *) context,
                          &error);

  if (error) {
    g_printerr ("Could not launch '%s': %s\n", id, error->message);
    g_clear_error (&error);
  }

  g_object_unref (context);
  g_object_unref (appinfo);
#if 0
  GnomeControlCenterPrivate *priv = shell->priv;
  GType panel_type = G_TYPE_INVALID;
  GList *panels, *l;
  GtkWidget *box;
  const gchar *icon_name;

  /* check if there is an plugin that implements this panel */
  panels = g_io_extension_point_get_extensions (priv->extension_point);

  if (!desktop_file)
    return FALSE;
  if (!id)
    return FALSE;

  for (l = panels; l != NULL; l = l->next)
    {
      GIOExtension *extension;
      const gchar *name;

      extension = l->data;

      name = g_io_extension_get_name (extension);

      if (!g_strcmp0 (name, id))
        {
          panel_type = g_io_extension_get_type (extension);
          break;
        }
    }

  if (panel_type == G_TYPE_INVALID)
    {
      g_warning ("Could not find the loadable module for panel '%s'", id);
      return FALSE;
    }

  /* create the panel plugin */
  priv->current_panel = g_object_new (panel_type, "shell", shell, "argv", argv, NULL);
  cc_shell_set_active_panel (CC_SHELL (shell), CC_PANEL (priv->current_panel));
  gtk_widget_show (priv->current_panel);

  gtk_lock_button_set_permission (GTK_LOCK_BUTTON (priv->lock_button),
                                  cc_panel_get_permission (CC_PANEL (priv->current_panel)));

  box = gtk_alignment_new (0, 0, 1, 1);
  gtk_alignment_set_padding (GTK_ALIGNMENT (box), 6, 6, 6, 6);

  gtk_container_add (GTK_CONTAINER (box), priv->current_panel);

  gtk_widget_set_name (box, id);
  notebook_add_page (priv->notebook, box);

  /* switch to the new panel */
  gtk_widget_show (box);
  notebook_select_page (priv->notebook, box);

  /* set the title of the window */
  icon_name = get_icon_name_from_g_icon (gicon);
  gtk_window_set_role (GTK_WINDOW (priv->window), id);
  gtk_window_set_title (GTK_WINDOW (priv->window), name);
  gtk_window_set_default_icon_name (icon_name);
  gtk_window_set_icon_name (GTK_WINDOW (priv->window), icon_name);

  priv->current_panel_box = box;
#endif
  return TRUE;
}
static gboolean
activate_panel (CinnamonControlCenter *shell,
                const gchar        *id,
		const gchar       **argv,
                const gchar        *desktop_file,
                const gchar        *name,
                GIcon              *gicon)
{
  CinnamonControlCenterPrivate *priv = shell->priv;
  GType panel_type = G_TYPE_INVALID;
  GList *panels, *l;
  GtkWidget *box;
  const gchar *icon_name;

  /* check if there is an plugin that implements this panel */
  panels = g_io_extension_point_get_extensions (priv->extension_point);

  if (!desktop_file)
    return FALSE;
  if (!id)
    return FALSE;

  for (l = panels; l != NULL; l = l->next)
    {
      GIOExtension *extension;
      const gchar *name;

      extension = l->data;

      name = g_io_extension_get_name (extension);

      if (!g_strcmp0 (name, id))
        {
          panel_type = g_io_extension_get_type (extension);
          break;
        }
    }

  if (panel_type == G_TYPE_INVALID)
    {
	  GKeyFile *key_file;

	  /* It might be an external panel */
	  key_file = g_key_file_new ();
	  if (g_key_file_load_from_file (key_file, desktop_file, G_KEY_FILE_NONE, NULL))
	    {
	      gchar *command;

	      command = g_key_file_get_string (key_file, G_KEY_FILE_DESKTOP_GROUP, G_KEY_FILE_DESKTOP_KEY_EXEC, NULL);
	      if (command && command[0])
	        {
		  g_spawn_command_line_async (command, NULL);
		  g_free (command);
		}
	    }

	  g_key_file_free (key_file);
      return FALSE;
    }

  /* create the panel plugin */
  priv->current_panel = g_object_new (panel_type, "shell", shell, "argv", argv, NULL);
  cc_shell_set_active_panel (CC_SHELL (shell), CC_PANEL (priv->current_panel));
  gtk_widget_show (priv->current_panel);

  gtk_lock_button_set_permission (GTK_LOCK_BUTTON (priv->lock_button),
                                  cc_panel_get_permission (CC_PANEL (priv->current_panel)));

  box = gtk_alignment_new (0, 0, 1, 1);
  gtk_alignment_set_padding (GTK_ALIGNMENT (box), 6, 6, 6, 6);

  gtk_container_add (GTK_CONTAINER (box), priv->current_panel);

  gtk_widget_set_name (box, id);
  notebook_add_page (priv->notebook, box);

  /* switch to the new panel */
  gtk_widget_show (box);
  notebook_select_page (priv->notebook, box);
  cc_shell_nav_bar_show_detail_button (CC_SHELL_NAV_BAR(shell->priv->nav_bar), name);

  /* set the title of the window */
  icon_name = get_icon_name_from_g_icon (gicon);
  gtk_window_set_role (GTK_WINDOW (priv->window), id);
  gtk_window_set_title (GTK_WINDOW (priv->window), name);
  gtk_window_set_default_icon_name (icon_name);
  gtk_window_set_icon_name (GTK_WINDOW (priv->window), icon_name);

  priv->current_panel_box = box;

  return TRUE;
}