power-manager-button.c

                      button);
#else
    button->priv->inhibit = xfpm_inhibit_new ();
#endif

    /* Sane defaults for the systray and panel icon */
#ifdef XFCE_PLUGIN
    button->priv->panel_icon_name = g_strdup (PANEL_DEFAULT_ICON_SYMBOLIC);
#else
    button->priv->panel_icon_name = g_strdup (PANEL_DEFAULT_ICON);
#endif
    button->priv->panel_icon_width = 24;

    /* Sane default Gtk style */
    css_provider = gtk_css_provider_new ();
    gtk_css_provider_load_from_data (css_provider,
                                     "#xfce4-power-manager-plugin {"
                                     "padding: 1px;"
                                     "border-width: 1px;}",
                                     -1, NULL);
    gtk_style_context_add_provider (GTK_STYLE_CONTEXT (gtk_widget_get_style_context (GTK_WIDGET (button))),
                                    GTK_STYLE_PROVIDER (css_provider), GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
    /* Intercept scroll events */
    gtk_widget_add_events (GTK_WIDGET (button), GDK_SCROLL_MASK);

    g_signal_connect (button->priv->upower, "device-added", G_CALLBACK (device_added_cb), button);
    g_signal_connect (button->priv->upower, "device-removed", G_CALLBACK (device_removed_cb), button);
}

static void
power_manager_button_finalize (GObject *object)
{
    PowerManagerButton *button;

    DBG("entering");

    button = POWER_MANAGER_BUTTON (object);

    g_free(button->priv->panel_icon_name);

    if (button->priv->set_level_timeout)
    {
        g_source_remove(button->priv->set_level_timeout);
        button->priv->set_level_timeout = 0;
    }

    g_signal_handlers_disconnect_by_data (button->priv->upower, button);

    power_manager_button_remove_all_devices (button);

#ifdef XFCE_PLUGIN
    g_object_unref (button->priv->plugin);
#endif

    G_OBJECT_CLASS (power_manager_button_parent_class)->finalize (object);
}

GtkWidget *
#ifdef XFCE_PLUGIN
power_manager_button_new (XfcePanelPlugin *plugin)
#endif
#ifdef XFPM_SYSTRAY
power_manager_button_new (void)
#endif
{
    PowerManagerButton *button = NULL;
    button = g_object_new (POWER_MANAGER_TYPE_BUTTON, NULL, NULL);

#ifdef XFCE_PLUGIN
    button->priv->plugin = XFCE_PANEL_PLUGIN (g_object_ref (plugin));
#endif

    xfconf_g_property_bind (button->priv->channel,
                            XFPM_PROPERTIES_PREFIX BRIGHTNESS_SLIDER_MIN_LEVEL, G_TYPE_INT,
                            G_OBJECT (button), BRIGHTNESS_SLIDER_MIN_LEVEL);
    xfconf_g_property_bind (button->priv->channel, XFPM_PROPERTIES_PREFIX SHOW_PANEL_LABEL, G_TYPE_INT,
                            G_OBJECT (button), SHOW_PANEL_LABEL);
    xfconf_g_property_bind (button->priv->channel, XFPM_PROPERTIES_PREFIX PRESENTATION_MODE, G_TYPE_BOOLEAN,
                            G_OBJECT (button), PRESENTATION_MODE);
    xfconf_g_property_bind (button->priv->channel, XFPM_PROPERTIES_PREFIX SHOW_PRESENTATION_INDICATOR, G_TYPE_BOOLEAN,
                            G_OBJECT (button), SHOW_PRESENTATION_INDICATOR);
    return GTK_WIDGET (button);
}

static gboolean
power_manager_button_press_event (GtkWidget *widget, GdkEventButton *event)
{
    PowerManagerButton *button = POWER_MANAGER_BUTTON (widget);

    if (event->button == 1 && !gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
    {
      gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (widget), TRUE);
      power_manager_button_show_menu (button);
      return TRUE;
    }

    if (event->button == 2)
    {
      gboolean state;

      state = xfconf_channel_get_bool (button->priv->channel, XFPM_PROPERTIES_PREFIX PRESENTATION_MODE, FALSE);
      xfconf_channel_set_bool (button->priv->channel, XFPM_PROPERTIES_PREFIX PRESENTATION_MODE, !state);
      return TRUE;
    }

    return FALSE;
}

#ifdef XFCE_PLUGIN
static void
power_manager_button_size_changed_cb (XfcePanelPlugin *plugin, gint size, PowerManagerButton *button)
{
#if !LIBXFCE4PANEL_CHECK_VERSION (4, 13, 0)
    GtkStyleContext *context;
    GtkBorder padding, border;
    gint width;
    gint xthickness;
    gint ythickness;
#endif

    g_return_if_fail (POWER_MANAGER_IS_BUTTON (button));
    g_return_if_fail (XFCE_IS_PANEL_PLUGIN (plugin));
    g_return_if_fail (size > 0);

    size /= xfce_panel_plugin_get_nrows (plugin);

#if LIBXFCE4PANEL_CHECK_VERSION (4, 13, 0)
    button->priv->panel_icon_width = xfce_panel_plugin_get_icon_size (plugin);
#else
    /* Calculate the size of the widget because the theme can override it */
    context = gtk_widget_get_style_context (GTK_WIDGET (button));
    gtk_style_context_get_padding (context, gtk_widget_get_state_flags (GTK_WIDGET (button)), &padding);
    gtk_style_context_get_border (context, gtk_widget_get_state_flags (GTK_WIDGET (button)), &border);
    xthickness = padding.left + padding.right + border.left + border.right;
    ythickness = padding.top + padding.bottom + border.top + border.bottom;

    /* Calculate the size of the space left for the icon */
    width = size - 2 * MAX (xthickness, ythickness);

    /* Since symbolic icons are usually only provided in 16px we
     * try to be clever and use size steps */
    if (width <= 21)
        button->priv->panel_icon_width = 16;
    else if (width >=22 && width <= 29)
        button->priv->panel_icon_width = 24;
    else if (width >= 30 && width <= 40)
        button->priv->panel_icon_width = 32;
    else
        button->priv->panel_icon_width = width;
#endif

    /* resize the plugin */
    gtk_widget_set_size_request (GTK_WIDGET (plugin), size, size);
    power_manager_button_set_icon (button);

    /* resize the plugin button too */
    gtk_widget_set_size_request (GTK_WIDGET (button), -1, -1);
}

static void
power_manager_button_style_update_cb (XfcePanelPlugin *plugin, PowerManagerButton *button)
{
    gtk_widget_reset_style (GTK_WIDGET (plugin));
    power_manager_button_size_changed_cb (plugin, xfce_panel_plugin_get_size (plugin), button);
}

static void
power_manager_button_free_data_cb (XfcePanelPlugin *plugin, PowerManagerButton *button)
{
    gtk_widget_destroy (GTK_WIDGET (button));
}
#endif

static void
help_cb (GtkMenuItem *menuitem, gpointer user_data)
{
    xfce_dialog_show_help_with_version (NULL, "xfce4-power-manager", "start", NULL, XFPM_VERSION_SHORT);
}

static void
about_cb (GtkMenuItem *menuitem, gpointer user_data)
{
    xfpm_about ("xfce4-power-manager");
}

void
power_manager_button_show (PowerManagerButton *button)
{
    GtkWidget *mi;
    GtkWidget *hbox;
    GtkStyleContext *context;
    GtkCssProvider *css_provider;

    g_return_if_fail (POWER_MANAGER_IS_BUTTON (button));

#ifdef XFCE_PLUGIN
    xfce_panel_plugin_add_action_widget (button->priv->plugin, GTK_WIDGET (button));
    xfce_panel_plugin_set_small (button->priv->plugin, TRUE);
#endif

    button->priv->panel_icon_image = gtk_image_new ();
    button->priv->panel_presentation_mode = gtk_image_new_from_icon_name (PRESENTATION_MODE_ICON, GTK_ICON_SIZE_BUTTON);
    gtk_image_set_pixel_size (GTK_IMAGE (button->priv->panel_presentation_mode), button->priv->panel_icon_width);
    context = gtk_widget_get_style_context (button->priv->panel_presentation_mode);
    css_provider = gtk_css_provider_new ();
    gtk_css_provider_load_from_data (css_provider,
                                     ".presentation-mode { color: @warning_color; }",
                                     -1, NULL);
    gtk_style_context_add_provider (context,
                                    GTK_STYLE_PROVIDER (css_provider),
                                    GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
    g_object_unref (css_provider);
    gtk_style_context_add_class (context, "presentation-mode");
    button->priv->panel_label = gtk_label_new ("");
    hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
    gtk_box_pack_start (GTK_BOX (hbox), GTK_WIDGET (button->priv->panel_presentation_mode), TRUE, FALSE, 0);
    gtk_box_pack_start (GTK_BOX (hbox), GTK_WIDGET (button->priv->panel_icon_image), TRUE, FALSE, 0);
    gtk_box_pack_start (GTK_BOX (hbox), GTK_WIDGET (button->priv->panel_label), TRUE, FALSE, 0);

    gtk_container_add (GTK_CONTAINER (button), GTK_WIDGET (hbox));

    /* help dialog */
    mi = gtk_menu_item_new_with_mnemonic (_("_Help"));
    gtk_widget_set_sensitive (mi, TRUE);
    gtk_widget_show (mi);
    g_signal_connect (mi, "activate", G_CALLBACK (help_cb), button);

    /* about dialog */
    mi = gtk_menu_item_new_with_mnemonic (_("_About"));
    gtk_widget_set_sensitive (mi, TRUE);
    gtk_widget_show (mi);
    g_signal_connect (mi, "activate", G_CALLBACK (about_cb), button);

#ifdef XFCE_PLUGIN
    xfce_panel_plugin_menu_insert_item (button->priv->plugin, GTK_MENU_ITEM (mi));

    g_signal_connect (button->priv->plugin, "size-changed",
                      G_CALLBACK (power_manager_button_size_changed_cb), button);

    g_signal_connect (button->priv->plugin, "style-updated",
                      G_CALLBACK (power_manager_button_style_update_cb), button);

    g_signal_connect (button->priv->plugin, "free-data",
                      G_CALLBACK (power_manager_button_free_data_cb), button);
#endif

    gtk_widget_show_all (GTK_WIDGET(button));

    gtk_widget_set_visible (button->priv->panel_presentation_mode, button->priv->presentation_mode &&
                                                                   button->priv->show_presentation_indicator);
    power_manager_button_update_label (button, button->priv->display_device);
    power_manager_button_set_tooltip (button);

    /* Add all the devcies currently attached to the system */
    power_manager_button_add_all_devices (button);
}

static void
power_manager_button_update_presentation_indicator (PowerManagerButton *button)
{
    gtk_image_set_pixel_size (GTK_IMAGE (button->priv->panel_presentation_mode), button->priv->panel_icon_width);

    gtk_widget_set_visible (button->priv->panel_presentation_mode, button->priv->presentation_mode &&
                                                                   button->priv->show_presentation_indicator);
}

static void
power_manager_button_update_label (PowerManagerButton *button, UpDevice *device)
{
    guint state;
    gdouble percentage;
    guint64 time_to_empty;
    guint64 time_to_full;

    if (!POWER_MANAGER_IS_BUTTON (button) || !UP_IS_DEVICE (device))
        return;

#ifdef XFCE_PLUGIN
    if (button->priv->show_panel_label <= 0 || button->priv->show_panel_label >3)
    {
        gtk_widget_hide (GTK_WIDGET (button->priv->panel_label));
        power_manager_button_size_changed_cb (button->priv->plugin,
                                              xfce_panel_plugin_get_size (button->priv->plugin),
                                              button);
        return;
    }
    else
        gtk_widget_show (GTK_WIDGET (button->priv->panel_label));
#endif

    g_object_get (device,
                  "state", &state,
                  "percentage", &percentage,
                  "time-to-empty", &time_to_empty,
                  "time-to-full", &time_to_full,
                  NULL);

    /* Hide the label if the battery is fully charged,
     * if the state is unknown (no battery available)
       or if it's a desktop system */
    if (state == UP_DEVICE_STATE_CHARGING)
        power_manager_button_set_label (button, percentage, time_to_full);
    else if (state == UP_DEVICE_STATE_FULLY_CHARGED
             || state == UP_DEVICE_STATE_UNKNOWN
             || g_strcmp0 (button->priv->panel_icon_name, "ac-adapter-symbolic") == 0)
        gtk_widget_hide (GTK_WIDGET (button->priv->panel_label));
    else
        power_manager_button_set_label (button, percentage, time_to_empty);
}

static void
menu_destroyed_cb(GtkMenuShell *menu, gpointer user_data)
{
    PowerManagerButton *button = POWER_MANAGER_BUTTON (user_data);

    TRACE("entering");

    /* menu destroyed, range slider is gone */
    button->priv->range = NULL;

    /* untoggle panel icon */
    gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON(button), FALSE);

    gtk_menu_detach (GTK_MENU (button->priv->menu));

    button->priv->menu = NULL;
}

static void
menu_item_destroyed_cb(GtkWidget *object, gpointer user_data)
{
    PowerManagerButton *button = POWER_MANAGER_BUTTON (user_data);
    GList *item;

    for (item = g_list_first (button->priv->devices); item != NULL; item = g_list_next (item))
    {
        BatteryDevice *battery_device = item->data;

        if (battery_device->menu_item == object)
        {
            battery_device->menu_item = NULL;
            return;
        }
    }
}

static void
menu_item_activate_cb(GtkWidget *object, gpointer user_data)
{
    PowerManagerButton *button = POWER_MANAGER_BUTTON (user_data);
    GList *item;

    for (item = g_list_first (button->priv->devices); item != NULL; item = g_list_next (item))
    {
        BatteryDevice *battery_device = item->data;

        if (battery_device->menu_item == object)
        {
            /* Call xfpm settings with the device id */
            xfpm_preferences_device_id (battery_device->object_path);
            return;
        }
    }
}

static gboolean
power_manager_button_menu_add_device (PowerManagerButton *button, BatteryDevice *battery_device, gboolean append)
{
    GtkWidget *mi, *label;
    guint type = 0;

    g_return_val_if_fail (POWER_MANAGER_IS_BUTTON (button), FALSE);

    /* We need a menu to attach it to */
    g_return_val_if_fail (button->priv->menu, FALSE);

    if (UP_IS_DEVICE (battery_device->device))
    {
        g_object_get (battery_device->device,
                      "kind", &type,
                      NULL);

        /* Don't add the display device or line power to the menu */
        if (type == UP_DEVICE_KIND_LINE_POWER || battery_device->device == button->priv->display_device)
        {
            DBG("filtering device from menu (display or line power device)");
            return FALSE;
        }
    }
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
    mi = gtk_image_menu_item_new_with_label(battery_device->details);
G_GNUC_END_IGNORE_DEPRECATIONS
    /* Make the menu item be bold and multi-line */
    label = gtk_bin_get_child (GTK_BIN (mi));
    gtk_label_set_use_markup (GTK_LABEL (label), TRUE);
    /* add the image */
    battery_device->img = gtk_image_new_from_pixbuf (battery_device->pix);
    g_object_ref (battery_device->img);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
    gtk_image_menu_item_set_image(GTK_IMAGE_MENU_ITEM(mi), battery_device->img);
G_GNUC_END_IGNORE_DEPRECATIONS
    /* keep track of the menu item in the battery_device so we can update it */
    battery_device->menu_item = mi;
    g_signal_connect(G_OBJECT (mi), "destroy", G_CALLBACK (menu_item_destroyed_cb), button);
    battery_device->expose_signal_id = g_signal_connect_after (G_OBJECT (battery_device->img),
                                                               "draw",
                                                               G_CALLBACK (power_manager_button_device_icon_draw),
                                                               battery_device->device);

    /* Active calls xfpm settings with the device's id to display details */
    g_signal_connect(G_OBJECT(mi), "activate", G_CALLBACK(menu_item_activate_cb), button);

    /* Add it to the menu */
    gtk_widget_show (mi);
    if (append)
        gtk_menu_shell_append (GTK_MENU_SHELL(button->priv->menu), mi);
    else
        gtk_menu_shell_prepend (GTK_MENU_SHELL(button->priv->menu), mi);

    return TRUE;
}

static void
add_inhibitor_to_menu (PowerManagerButton *button, const gchar *text)
{
    GtkWidget *mi, *img;

    /* Translators this is to display which app is inhibiting
     * power in the plugin menu. Example:
     * VLC is currently inhibiting power management
     */
    gchar *label = g_strdup_printf (_("%s is currently inhibiting power management"), text);

G_GNUC_BEGIN_IGNORE_DEPRECATIONS
    mi = gtk_image_menu_item_new_with_label(label);
G_GNUC_END_IGNORE_DEPRECATIONS
    /* add the image */
    img = gtk_image_new_from_icon_name ("dialog-information", GTK_ICON_SIZE_MENU);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
    gtk_image_menu_item_set_image(GTK_IMAGE_MENU_ITEM(mi), img);
G_GNUC_END_IGNORE_DEPRECATIONS

    gtk_widget_set_can_focus (mi, FALSE);
    gtk_widget_show (mi);
    gtk_menu_shell_append (GTK_MENU_SHELL(button->priv->menu), mi);
    g_free (label);
}

#ifdef XFCE_PLUGIN
static void
display_inhibitors (PowerManagerButton *button, GtkWidget *menu)
{
    GtkWidget *separator_mi;
    gboolean needs_seperator = FALSE;

    g_return_if_fail (POWER_MANAGER_IS_BUTTON (button));
    g_return_if_fail (GTK_IS_MENU (menu));

    if (button->priv->inhibit_proxy)
    {
        GVariant *reply;
        GError   *error = NULL;

        reply = g_dbus_proxy_call_sync (button->priv->inhibit_proxy,
                                        "GetInhibitors",
                                        g_variant_new ("()"),
                                        G_DBUS_CALL_FLAGS_NONE,
                                        1000,
                                        NULL,
                                        &error);

        if (reply != NULL)
        {
            GVariantIter *iter;
            gchar        *value;

            g_variant_get (reply, "(as)", &iter);

            if (g_variant_iter_n_children (iter) > 0)
            {
                needs_seperator = TRUE;
            }

            /* Add the list of programs to the menu */
            while (g_variant_iter_next (iter, "s", &value))
            {
                add_inhibitor_to_menu (button, value);
            }
            g_variant_iter_free (iter);
            g_variant_unref (reply);

        } else {
            g_warning ("failed calling GetInhibitors: %s", error->message);
            g_clear_error (&error);
        }

        if (needs_seperator)
        {
            /* add a separator */
            separator_mi = gtk_separator_menu_item_new ();
            gtk_widget_show (separator_mi);
            gtk_menu_shell_append (GTK_MENU_SHELL (menu), separator_mi);
        }

    }
}
#else
static void
display_inhibitors (PowerManagerButton *button, GtkWidget *menu)
{
    guint i;
    GtkWidget *separator_mi;
    const gchar **inhibitors;

    g_return_if_fail (POWER_MANAGER_IS_BUTTON (button));
    g_return_if_fail (GTK_IS_MENU (menu));

    inhibitors = xfpm_inhibit_get_inhibit_list (button->priv->inhibit);
    if (inhibitors != NULL && inhibitors[0] != NULL)
    {
        for (i=0; inhibitors[i] != NULL; i++)
        {
            add_inhibitor_to_menu (button, inhibitors[i]);
        }

        /* add a separator */
        separator_mi = gtk_separator_menu_item_new ();
        gtk_widget_show (separator_mi);
        gtk_menu_shell_append (GTK_MENU_SHELL (menu), separator_mi);
    }

    g_free (inhibitors);
}
#endif

static void
decrease_brightness (PowerManagerButton *button)
{
    gint32 level;

    TRACE("entering");

    if ( !xfpm_brightness_has_hw (button->priv->brightness) )
        return;

    xfpm_brightness_get_level (button->priv->brightness, &level);

    if ( level > button->priv->brightness_min_level )
    {
        xfpm_brightness_down (button->priv->brightness, &level);
        if (button->priv->range)
            gtk_range_set_value (GTK_RANGE (button->priv->range), level);
    }
}

static void
increase_brightness (PowerManagerButton *button)
{
    gint32 level, max_level;

    TRACE("entering");

    if (!xfpm_brightness_has_hw (button->priv->brightness))
        return;

    max_level = xfpm_brightness_get_max_level (button->priv->brightness);
    xfpm_brightness_get_level (button->priv->brightness, &level);

    if (level < max_level)
    {
        xfpm_brightness_up (button->priv->brightness, &level);
        if (button->priv->range)
            gtk_range_set_value (GTK_RANGE (button->priv->range), level);
    }
}

static gboolean
brightness_set_level_with_timeout (PowerManagerButton *button)
{
    gint32 range_level, hw_level;

    TRACE("entering");

    range_level = (gint32) gtk_range_get_value (GTK_RANGE (button->priv->range));

    xfpm_brightness_get_level (button->priv->brightness, &hw_level);

    if (hw_level != range_level)
    {
        xfpm_brightness_set_level (button->priv->brightness, range_level);
    }

    if (button->priv->set_level_timeout)
    {
        g_source_remove(button->priv->set_level_timeout);
        button->priv->set_level_timeout = 0;
    }

    return FALSE;
}

static void
range_value_changed_cb (PowerManagerButton *button, GtkWidget *widget)
{
    TRACE("entering");

    if (button->priv->set_level_timeout)
        return;

    button->priv->set_level_timeout =
        g_timeout_add (SET_LEVEL_TIMEOUT,
                       (GSourceFunc) brightness_set_level_with_timeout, button);
}

static void
range_scroll_cb (GtkWidget *widget, GdkEvent *event, PowerManagerButton *button)
{
    GdkEventScroll *scroll_event;

    TRACE("entering");

    scroll_event = (GdkEventScroll*)event;

    if (scroll_event->direction == GDK_SCROLL_UP)
        increase_brightness (button);
    else if (scroll_event->direction == GDK_SCROLL_DOWN)
        decrease_brightness (button);
}

static void
range_show_cb (GtkWidget *widget, PowerManagerButton *button)
{
#if !GTK_CHECK_VERSION (3, 20, 0)
    GdkDeviceManager* manager = gdk_display_get_device_manager (gdk_display_get_default());
    GdkDevice* pointer = gdk_device_manager_get_client_pointer (manager);
#else
    GdkSeat   *seat = gdk_display_get_default_seat (gdk_display_get_default());
    GdkDevice *pointer = gdk_seat_get_pointer (seat);
#endif

    TRACE("entering");
    /* Release these grabs as they will cause a lockup if pkexec is called
     * for the brightness helper */
    if (pointer)
    {
#if !GTK_CHECK_VERSION (3, 20, 0)
        gdk_device_ungrab (pointer, GDK_CURRENT_TIME);
#else
        gdk_seat_ungrab (seat);
#endif
    }

    gtk_grab_remove (widget);
}

void
power_manager_button_toggle_presentation_mode (GtkMenuItem *mi, GtkSwitch *sw)
{
  g_return_if_fail (GTK_IS_SWITCH (sw));

  gtk_switch_set_active (sw, !gtk_switch_get_active (sw));
}


void
power_manager_button_show_menu (PowerManagerButton *button)
{
    GtkWidget *menu, *mi, *img = NULL;
    GtkWidget *box, *label, *sw;
    GdkScreen *gscreen;
    GList *item;
    gboolean show_separator_flag = FALSE;
    gint32 max_level, current_level = 0;

    TRACE("entering");

    g_return_if_fail (POWER_MANAGER_IS_BUTTON (button));

    if (gtk_widget_has_screen (GTK_WIDGET (button)))
        gscreen = gtk_widget_get_screen(GTK_WIDGET(button));
    else
        gscreen = gdk_display_get_default_screen(gdk_display_get_default());

    menu = gtk_menu_new ();
    gtk_menu_set_screen(GTK_MENU(menu), gscreen);
    /* keep track of the menu while it's being displayed */
    button->priv->menu = menu;
    g_signal_connect(GTK_MENU_SHELL(menu), "deactivate", G_CALLBACK(menu_destroyed_cb), button);
    gtk_menu_attach_to_widget (GTK_MENU (menu), GTK_WIDGET (button), NULL);

    for (item = g_list_first (button->priv->devices); item != NULL; item = g_list_next (item))
    {
        BatteryDevice *battery_device = item->data;

        if (power_manager_button_menu_add_device (button, battery_device, TRUE))
        {
            /* If we add an item to the menu, show the separator */
            show_separator_flag = TRUE;
        }
    }

    if (show_separator_flag)
    {
        /* separator */
        mi = gtk_separator_menu_item_new ();
        gtk_widget_show (mi);
        gtk_menu_shell_append (GTK_MENU_SHELL (menu), mi);
    }

    /* Display brightness slider - show if there's hardware support for it */
    if ( xfpm_brightness_has_hw (button->priv->brightness) )
    {
        max_level = xfpm_brightness_get_max_level (button->priv->brightness);

        mi = scale_menu_item_new_with_range (button->priv->brightness_min_level, max_level, 1);

        scale_menu_item_set_description_label (SCALE_MENU_ITEM (mi), _("<b>Display brightness</b>"));

        /* range slider */
        button->priv->range = scale_menu_item_get_scale (SCALE_MENU_ITEM (mi));

        /* update the slider to the current brightness level */
        xfpm_brightness_get_level (button->priv->brightness, &current_level);
        gtk_range_set_value (GTK_RANGE (button->priv->range), current_level);

        g_signal_connect_swapped (mi, "value-changed", G_CALLBACK (range_value_changed_cb), button);
        g_signal_connect (mi, "scroll-event", G_CALLBACK (range_scroll_cb), button);
        g_signal_connect (menu, "show", G_CALLBACK (range_show_cb), button);

        /* load and display the brightness icon and force it to 32px size */
        img = gtk_image_new_from_icon_name (XFPM_DISPLAY_BRIGHTNESS_ICON, GTK_ICON_SIZE_DND);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
        gtk_image_menu_item_set_image (GTK_IMAGE_MENU_ITEM(mi), img);
G_GNUC_END_IGNORE_DEPRECATIONS
        gtk_image_set_pixel_size (GTK_IMAGE (img), 32);
        gtk_widget_show_all (mi);
        gtk_menu_shell_append(GTK_MENU_SHELL(menu), mi);
    }

    /* Presentation mode checkbox */
    mi = gtk_menu_item_new ();
    box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
    label = gtk_label_new_with_mnemonic (_("Presentation _mode"));
    gtk_label_set_xalign (GTK_LABEL (label), 0.0);
    sw = gtk_switch_new ();
    gtk_box_pack_start (GTK_BOX (box), label, TRUE, TRUE, 0);
    gtk_box_pack_start (GTK_BOX (box), sw, FALSE, FALSE, 0);
    gtk_container_add (GTK_CONTAINER (mi), box);
    gtk_widget_show_all (mi);
    gtk_menu_shell_append (GTK_MENU_SHELL (menu), mi);
    g_signal_connect (G_OBJECT (mi), "activate", G_CALLBACK (power_manager_button_toggle_presentation_mode), sw);
    g_object_bind_property (G_OBJECT (button), PRESENTATION_MODE,
                            G_OBJECT (sw), "active",
                            G_BINDING_SYNC_CREATE | G_BINDING_BIDIRECTIONAL);

    /* Show any applications currently inhibiting now */
    display_inhibitors (button, menu);

    /* Power manager settings */
    mi = gtk_menu_item_new_with_mnemonic (_("_Power manager settings..."));
    gtk_widget_show (mi);
    gtk_menu_shell_append (GTK_MENU_SHELL(menu), mi);
    g_signal_connect (G_OBJECT(mi), "activate", G_CALLBACK(xfpm_preferences), NULL);

#if GTK_CHECK_VERSION (3, 22, 0)
    gtk_menu_popup_at_widget (GTK_MENU (menu),
                              GTK_WIDGET (button),
#ifdef XFCE_PLUGIN
                              xfce_panel_plugin_get_orientation (button->priv->plugin) == GTK_ORIENTATION_VERTICAL
                              ? GDK_GRAVITY_WEST : GDK_GRAVITY_NORTH,
                              xfce_panel_plugin_get_orientation (button->priv->plugin) == GTK_ORIENTATION_VERTICAL
                              ? GDK_GRAVITY_EAST : GDK_GRAVITY_SOUTH,
#else
                              GDK_GRAVITY_NORTH,
                              GDK_GRAVITY_SOUTH,
#endif
                              NULL);
#else
    gtk_menu_popup (GTK_MENU (menu),
                    NULL,
                    NULL,
#ifdef XFCE_PLUGIN
                    xfce_panel_plugin_position_menu,
#else
                    NULL,
#endif
#ifdef XFCE_PLUGIN
                    button->priv->plugin,
#else
                    NULL,
#endif
                    0,
                    gtk_get_current_event_time ());
#endif

#ifdef XFCE_PLUGIN
    xfce_panel_plugin_register_menu (button->priv->plugin,
                                     GTK_MENU (menu));
#endif
}