/*
 * Copyright (C) 2005-2009 Alex Murray <murray.alex@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */

#include <glib/gi18n.h>
#include <gio/gio.h>
#include "sensors-applet-settings.h"
#include "prefs-dialog.h"
#include "sensor-config-dialog.h"

#define OLD_TEMP_SCALE 0
#define NEW_TEMP_SCALE 1

/* when a user closes the prefs-dialog we assume that applet is now
   setup, so store all values in gsettings */
void prefs_dialog_close(SensorsApplet *sensors_applet) {

        if (sensors_applet->sensors != NULL) {
                sensors_applet_settings_save_sensors(sensors_applet);
        }
        if (sensors_applet->prefs_dialog) {
                gtk_widget_destroy(GTK_WIDGET(sensors_applet->prefs_dialog->dialog));
                g_free(sensors_applet->prefs_dialog);
                sensors_applet->prefs_dialog = NULL;

        }
        if (sensors_applet->timeout_id == 0) {
                sensors_applet->timeout_id = g_timeout_add_seconds(g_settings_get_int (sensors_applet->settings, TIMEOUT) / 1000, (GSourceFunc)sensors_applet_update_active_sensors, sensors_applet);
        }


}

void prefs_dialog_response(GtkDialog *prefs_dialog,
                           gint response,
                           gpointer data) {

        SensorsApplet *sensors_applet;
        GError *error = NULL;
        gint current_page;
	gchar *uri;

        sensors_applet = (SensorsApplet *)data;

        switch (response) {
        case GTK_RESPONSE_HELP:
                g_debug("loading help in prefs");
                current_page = gtk_notebook_get_current_page(sensors_applet->prefs_dialog->notebook);
		uri = g_strdup_printf("help:mate-sensors-applet/%s",
				      ((current_page == 0) ?
				       "sensors-applet-general-options" :
				       ((current_page == 1) ?
					"sensors-applet-sensors" :
					NULL)));
                gtk_show_uri(NULL, uri, gtk_get_current_event_time(), &error);
		g_free(uri);

                if (error) {
                        g_debug("Could not open help document: %s ",error->message);
                        g_error_free (error);
                }
                break;
        default:
                g_debug("closing prefs dialog");
                prefs_dialog_close(sensors_applet);
        }
}


static gboolean prefs_dialog_convert_low_and_high_values(GtkTreeModel *model,
                                                         GtkTreePath *path,
                                                         GtkTreeIter *iter,
                                                         TemperatureScale scales[2]) {
        SensorType sensor_type;
        gdouble low_value, high_value;

        gtk_tree_model_get(model,
                           iter,
                           SENSOR_TYPE_COLUMN, &sensor_type,
                           LOW_VALUE_COLUMN, &low_value,
                           HIGH_VALUE_COLUMN, &high_value,
                           -1);

        if (sensor_type == TEMP_SENSOR)
        {
                low_value = sensors_applet_convert_temperature(low_value,
                                                               scales[OLD_TEMP_SCALE],
                                                               scales[NEW_TEMP_SCALE]);

                high_value = sensors_applet_convert_temperature(high_value,
                                                                scales[OLD_TEMP_SCALE],
                                                                scales[NEW_TEMP_SCALE]);


                gtk_tree_store_set(GTK_TREE_STORE(model),
                                   iter,
                                   LOW_VALUE_COLUMN, low_value,
                                   HIGH_VALUE_COLUMN, high_value,
                                   -1);
        }
        return FALSE;
}


static void prefs_dialog_timeout_changed(GtkSpinButton *button,
                                         PrefsDialog *prefs_dialog) {
        gint value;
        value = (gint)(gtk_spin_button_get_value(button) * 1000);
        g_settings_set_int (prefs_dialog->sensors_applet->settings, TIMEOUT, value);
}

static void prefs_dialog_display_mode_changed(GtkComboBox *display_mode_combo_box,
                                              PrefsDialog *prefs_dialog) {

        int display_mode;

        display_mode = gtk_combo_box_get_active(display_mode_combo_box);

        gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->layout_mode_label),
                                 (display_mode != DISPLAY_ICON) &&
                                 (display_mode != DISPLAY_VALUE) &&
                                 (display_mode != DISPLAY_GRAPH));
        gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->layout_mode_combo_box),
                                 (display_mode != DISPLAY_ICON) &&
                                 (display_mode != DISPLAY_VALUE) &&
                                 (display_mode != DISPLAY_GRAPH));

        gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->graph_size_label),
                                 (display_mode == DISPLAY_GRAPH));
        gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->graph_size_spinbutton),
                                 (display_mode == DISPLAY_GRAPH));

        g_settings_set_int (prefs_dialog->sensors_applet->settings,
                            DISPLAY_MODE,
                            gtk_combo_box_get_active(display_mode_combo_box));

        sensors_applet_display_layout_changed(prefs_dialog->sensors_applet);
}

static void prefs_dialog_layout_mode_changed(GtkComboBox *layout_mode_combo_box,
                                             PrefsDialog *prefs_dialog) {

        g_settings_set_int (prefs_dialog->sensors_applet->settings,
                            LAYOUT_MODE,
                            gtk_combo_box_get_active(layout_mode_combo_box));

        sensors_applet_display_layout_changed(prefs_dialog->sensors_applet);
}


static void prefs_dialog_temperature_scale_changed(GtkComboBox *temperature_scale_combo_box,
                                                   PrefsDialog *prefs_dialog) {
        /* get old temp scale value */
        TemperatureScale scales[2];
        GtkTreeModel *model;

        scales[OLD_TEMP_SCALE] = (TemperatureScale) g_settings_get_int (prefs_dialog->sensors_applet->settings,
                                                                        TEMPERATURE_SCALE);

        scales[NEW_TEMP_SCALE] = (TemperatureScale)gtk_combo_box_get_active(temperature_scale_combo_box);

        g_settings_set_int (prefs_dialog->sensors_applet->settings,
                            TEMPERATURE_SCALE,
                            scales[NEW_TEMP_SCALE]);

        /* now go thru and convert all low and high sensor values in
         * the tree to either celcius or Fahrenheit */
        model = gtk_tree_view_get_model(prefs_dialog->view);
        gtk_tree_model_foreach(model,
                               (GtkTreeModelForeachFunc)prefs_dialog_convert_low_and_high_values,
                               scales);

        /* finally update display of active sensors */
        sensors_applet_update_active_sensors(prefs_dialog->sensors_applet);
}


#ifdef HAVE_LIBNOTIFY
static void prefs_dialog_display_notifications_toggled(GtkCheckButton *display_notifications,
                                                       PrefsDialog *prefs_dialog) {

        gboolean notify;

        notify = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(display_notifications));
        g_settings_set_boolean(prefs_dialog->sensors_applet->settings,
                               DISPLAY_NOTIFICATIONS,
                               notify);

        if (notify) {
                sensors_applet_update_active_sensors(prefs_dialog->sensors_applet);
        } else {
                sensors_applet_notify_end_all(prefs_dialog->sensors_applet);
        }
}
#endif

static void prefs_dialog_graph_size_changed(GtkSpinButton *button,
                                            PrefsDialog *prefs_dialog) {
        gint value;
        value = (gint)(gtk_spin_button_get_value(button));
        g_settings_set_int(prefs_dialog->sensors_applet->settings, GRAPH_SIZE, value);

        /* notify change of number of samples */
        sensors_applet_graph_size_changed(prefs_dialog->sensors_applet);

}

/* callbacks for the tree of sensors */
static void prefs_dialog_sensor_toggled(GtkCellRenderer *renderer, gchar *path_str, PrefsDialog *prefs_dialog) {
        GtkTreeIter iter;
        GtkTreePath *path;

        gboolean old_value;

        path = gtk_tree_path_new_from_string(path_str);

        gtk_tree_model_get_iter(GTK_TREE_MODEL(prefs_dialog->sensors_applet->sensors), &iter, path);
        gtk_tree_model_get(GTK_TREE_MODEL(prefs_dialog->sensors_applet->sensors),
                           &iter,
                           ENABLE_COLUMN, &old_value,
                           -1);

        if (old_value) {
                sensors_applet_sensor_disabled(prefs_dialog->sensors_applet,
                                               path);
        } else {
                sensors_applet_sensor_enabled(prefs_dialog->sensors_applet,
                                              path);
        }

        gtk_tree_store_set(prefs_dialog->sensors_applet->sensors, &iter,
                           ENABLE_COLUMN, !old_value,
                           -1);

        gtk_tree_path_free(path);
}

static void prefs_dialog_sensor_name_changed(GtkCellRenderer *renderer, gchar *path_str, gchar *new_text, PrefsDialog *prefs_dialog) {
        GtkTreeIter iter;
        GtkTreePath *path = gtk_tree_path_new_from_string(path_str);

        gtk_tree_model_get_iter(GTK_TREE_MODEL(prefs_dialog->sensors_applet->sensors), &iter, path);

        gtk_tree_store_set(prefs_dialog->sensors_applet->sensors, &iter, LABEL_COLUMN, new_text, -1);

        sensors_applet_update_sensor(prefs_dialog->sensors_applet, path);
        gtk_tree_path_free(path);
}

static void prefs_dialog_row_activated(GtkTreeView *view, GtkTreePath *path, GtkTreeViewColumn *column, PrefsDialog *prefs_dialog) {
        /* only bring up dialog this if is a sensor - ie has no
         * children */
        GtkTreeIter iter;
        GtkTreeModel *model;

        model = gtk_tree_view_get_model(view);
        /* make sure can set iter first */
        if (gtk_tree_model_get_iter(model, &iter, path) && !gtk_tree_model_iter_has_child(model, &iter)) {
                sensor_config_dialog_create(prefs_dialog->sensors_applet);
        }
}


static void prefs_dialog_sensor_up_button_clicked(GtkButton *button, PrefsDialog *prefs_dialog) {
        GtkTreeModel *model;
        GtkTreeIter iter;
        GtkTreePath *path;

        if (gtk_tree_selection_get_selected(prefs_dialog->sensors_applet->selection, &model, &iter)) {
                /* if has no prev node set up button insentive */
                path = gtk_tree_model_get_path(model, &iter);
                if (gtk_tree_path_prev(path)) {
                        GtkTreeIter prev_iter;
                        /* check is a valid node in out model */
                        if (gtk_tree_model_get_iter(model, &prev_iter, path)) {
                                gtk_tree_store_move_before(GTK_TREE_STORE(model),
                                                           &iter,
                                                           &prev_iter);
                                g_signal_emit_by_name(prefs_dialog->sensors_applet->selection,
                                                      "changed");

                                sensors_applet_reorder_sensors(prefs_dialog->sensors_applet);


                        }
                }

                gtk_tree_path_free(path);

        }
}

static void prefs_dialog_sensor_down_button_clicked(GtkButton *button, PrefsDialog *prefs_dialog) {
        GtkTreeModel *model;
        GtkTreeIter iter;
        GtkTreeIter iter_next;

        if (gtk_tree_selection_get_selected(prefs_dialog->sensors_applet->selection, &model, &iter)) {
                iter_next = iter;
                /* if has no next node set down button insentive */
                if (gtk_tree_model_iter_next(model, &iter_next)) {
                        gtk_tree_store_move_after(GTK_TREE_STORE(model),
                                                  &iter,
                                                  &iter_next);
                        g_signal_emit_by_name(prefs_dialog->sensors_applet->selection,
                                              "changed");
                        sensors_applet_reorder_sensors(prefs_dialog->sensors_applet);

                }
        }
}



static void prefs_dialog_sensor_config_button_clicked(GtkButton *button, PrefsDialog *prefs_dialog) {
        sensor_config_dialog_create(prefs_dialog->sensors_applet);
}


/* if a sensor is selected, make config sure button is able to be
 * clicked and also set the sensitivities properly for the up and down
 * buttons */
static void prefs_dialog_selection_changed(GtkTreeSelection *selection,
                                           PrefsDialog *prefs_dialog) {
        GtkTreeIter iter;
        GtkTreePath *path;
        GtkTreeModel *model;
        /* if there is a selection with no children make config button
         * sensitive */
        if (gtk_tree_selection_get_selected(selection, &model, &iter)) {
                if (!gtk_tree_model_iter_has_child(model, &iter)) {
                        gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->sensor_config_button), TRUE);
                } else {
                        /* otherwise make insensitive */
                        gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->sensor_config_button), FALSE);
                }

                /* if has no prev node set up button insentive */
                path = gtk_tree_model_get_path(model, &iter);
                if (gtk_tree_path_prev(path)) {
                        GtkTreeIter prev_iter;
                        /* check is a valid node in out model */
                        if (gtk_tree_model_get_iter(model, &prev_iter, path)) {
                                gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->sensor_up_button), TRUE);
                        } else {
                                gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->sensor_up_button), FALSE);
                        }
                }  else {
                        gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->sensor_up_button), FALSE);
                }

                gtk_tree_path_free(path);

                /* if has no next node set down button insentive */
                if (gtk_tree_model_iter_next(model, &iter)) {
                        gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->sensor_down_button), TRUE);
                } else {
                        gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->sensor_down_button), FALSE);
                }

        } else {
                /* otherwise make all insensitive */
                gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->sensor_config_button), FALSE);
                gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->sensor_up_button), FALSE);
                gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->sensor_down_button), FALSE);

        }
}

void prefs_dialog_open(SensorsApplet *sensors_applet) {
        gchar *header_text;
        PrefsDialog *prefs_dialog;
        DisplayMode display_mode;
        GtkWidget *content_area;

        g_assert(sensors_applet->prefs_dialog == NULL);

        /* while prefs dialog is open, stop the updating of sensors so
         * we don't get any race conditions due to concurrent updates
         * of the labels, values and icons linked lists etc. */
        if (sensors_applet->timeout_id != 0) {
                if (g_source_remove(sensors_applet->timeout_id)) {
                        sensors_applet->timeout_id = 0;
                }
        }

        sensors_applet->prefs_dialog = g_new0(PrefsDialog, 1);
        prefs_dialog = sensors_applet->prefs_dialog;

        prefs_dialog->sensors_applet = sensors_applet;

        prefs_dialog->dialog = GTK_DIALOG(gtk_dialog_new_with_buttons(_("Sensors Applet Preferences"),
                                                                      NULL,
                                                                      0,
                                                                      GTK_STOCK_HELP,
                                                                      GTK_RESPONSE_HELP,
                                                                      GTK_STOCK_CLOSE,
                                                                      GTK_RESPONSE_CLOSE,
                                                                      NULL));
        gtk_window_set_icon_name(GTK_WINDOW(prefs_dialog->dialog),
                                 "mate-sensors-applet");

        g_object_set(prefs_dialog->dialog,
                     "border-width", 12,
                     "default-width", 480,
                     "default-height", 350,
                     NULL);

        content_area = gtk_dialog_get_content_area (prefs_dialog->dialog);
        gtk_box_set_homogeneous(GTK_BOX(content_area), FALSE);

        gtk_box_set_spacing(GTK_BOX(content_area), 5);


        g_signal_connect(prefs_dialog->dialog,
                         "response", G_CALLBACK(prefs_dialog_response),
                         sensors_applet);

        g_signal_connect_swapped(prefs_dialog->dialog,
                                 "delete-event", G_CALLBACK(prefs_dialog_close),
                                 sensors_applet);

        g_signal_connect_swapped(prefs_dialog->dialog,
                                 "destroy", G_CALLBACK(prefs_dialog_close),
                                 sensors_applet);

        /* if no SensorsList's have been created, this is because
           we haven't been able to access any sensors */
        if (sensors_applet->sensors == NULL) {
                GtkWidget *label;
                GtkWidget *content_area;
                label = gtk_label_new(_("No sensors found!"));
                content_area = gtk_dialog_get_content_area (prefs_dialog->dialog);
                gtk_box_pack_start (GTK_BOX(content_area), label, FALSE, FALSE, 0);
                return;
        }


        header_text = g_markup_printf_escaped("<b>%s</b>", _("Display"));
        prefs_dialog->display_header = g_object_new(GTK_TYPE_LABEL,
                                                    "use-markup", TRUE,
                                                    "label", header_text,

                                                    "xalign", 0.0,
                                                    NULL);
        g_free(header_text);

        prefs_dialog->display_mode_combo_box = GTK_COMBO_BOX(gtk_combo_box_text_new());


        gtk_combo_box_text_append_text(prefs_dialog->display_mode_combo_box, _("label with value"));
        gtk_combo_box_text_append_text(prefs_dialog->display_mode_combo_box, _("icon with value"));
        gtk_combo_box_text_append_text(prefs_dialog->display_mode_combo_box, _("value only"));
        gtk_combo_box_text_append_text(prefs_dialog->display_mode_combo_box, _("icon only"));
        gtk_combo_box_text_append_text(prefs_dialog->display_mode_combo_box, _("graph only"));


        display_mode = g_settings_get_int(sensors_applet->settings, DISPLAY_MODE);
        gtk_combo_box_set_active(prefs_dialog->display_mode_combo_box, display_mode);

        g_signal_connect(prefs_dialog->display_mode_combo_box,
                         "changed",
                         G_CALLBACK(prefs_dialog_display_mode_changed),
                         prefs_dialog);



        /* use spaces in label to indent */
        prefs_dialog->display_mode_label = g_object_new(GTK_TYPE_LABEL,
                                                        "use-underline", TRUE,
                                                        "label", _("_Display sensors in panel as"),
                                                        "mnemonic-widget", prefs_dialog->display_mode_combo_box,
                                                        "xalign", 0.0,
                                                        NULL);




        prefs_dialog->layout_mode_combo_box = GTK_COMBO_BOX(gtk_combo_box_text_new());

        gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->layout_mode_combo_box),
                                 (display_mode != DISPLAY_ICON) &&
                                 (display_mode != DISPLAY_VALUE) &&
                                 (display_mode != DISPLAY_GRAPH));

        gtk_combo_box_text_append_text(prefs_dialog->layout_mode_combo_box, _("beside labels / icons"));
        gtk_combo_box_text_append_text(prefs_dialog->layout_mode_combo_box, _("below labels / icons"));

        gtk_combo_box_set_active(prefs_dialog->layout_mode_combo_box, g_settings_get_int(sensors_applet->settings, LAYOUT_MODE));

        g_signal_connect(prefs_dialog->layout_mode_combo_box,
                         "changed",
                         G_CALLBACK(prefs_dialog_layout_mode_changed),
                         prefs_dialog);

        prefs_dialog->layout_mode_label = g_object_new(GTK_TYPE_LABEL,
                                                       "use-underline", TRUE,
                                                       "label", _("Preferred _position of sensor values"),
                                                       "mnemonic-widget", prefs_dialog->layout_mode_combo_box,
                                                       "xalign", 0.0,
                                                       NULL);

        gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->layout_mode_label),
                                 (display_mode != DISPLAY_ICON) &&
                                 (display_mode != DISPLAY_VALUE) &&
                                 (display_mode != DISPLAY_GRAPH));

        prefs_dialog->temperature_scale_combo_box = GTK_COMBO_BOX(gtk_combo_box_text_new());

        gtk_combo_box_text_append_text(prefs_dialog->temperature_scale_combo_box, _("Kelvin"));
        gtk_combo_box_text_append_text(prefs_dialog->temperature_scale_combo_box, _("Celsius"));
        gtk_combo_box_text_append_text(prefs_dialog->temperature_scale_combo_box, _("Fahrenheit"));

        gtk_combo_box_set_active(prefs_dialog->temperature_scale_combo_box, g_settings_get_int(sensors_applet->settings, TEMPERATURE_SCALE));

        g_signal_connect(prefs_dialog->temperature_scale_combo_box,
                         "changed",
                         G_CALLBACK(prefs_dialog_temperature_scale_changed),
                         prefs_dialog);

        prefs_dialog->temperature_scale_label = g_object_new(GTK_TYPE_LABEL,
                                                             "use-underline", TRUE,
                                                             "label", _("_Temperature scale"),
                                                             "mnemonic-widget", prefs_dialog->temperature_scale_combo_box,
                                                             "xalign", 0.0,
                                                             NULL);

        prefs_dialog->graph_size_adjust = g_object_new(GTK_TYPE_ADJUSTMENT,
                                                       "value", (gdouble)g_settings_get_int(sensors_applet->settings, GRAPH_SIZE),
                                                       "lower", 1.0,
                                                       "upper", 100.0,
                                                       "step-increment", 1.0,
                                                       "page-increment", 10.0,
                                                       "page-size", 0.0,
                                                       NULL);

        prefs_dialog->graph_size_spinbutton = g_object_new(GTK_TYPE_SPIN_BUTTON,
                                                           "adjustment", prefs_dialog->graph_size_adjust,
                                                           "climb-rate", 1.0,
                                                           "digits", 0,
                                                           "value", (gdouble)g_settings_get_int(sensors_applet->settings, GRAPH_SIZE),
                                                           "width-chars", 4,
                                                           NULL);

        gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->graph_size_spinbutton),
                                 (display_mode == DISPLAY_GRAPH));

        prefs_dialog->graph_size_label = g_object_new(GTK_TYPE_LABEL,
                                                      "use-underline", TRUE,
                                                      "label", _("Graph _size (pixels)"),
                                                      "mnemonic-widget", prefs_dialog->graph_size_spinbutton,
                                                      "xalign", 0.0,
                                                      NULL);

        gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->graph_size_label),
                                 (display_mode == DISPLAY_GRAPH));

        g_signal_connect(prefs_dialog->graph_size_spinbutton, "value-changed",
                         G_CALLBACK(prefs_dialog_graph_size_changed),
                         prefs_dialog);


        header_text = g_markup_printf_escaped("<b>%s</b>", _("Update"));
        prefs_dialog->update_header = g_object_new(GTK_TYPE_LABEL,
                                                   "use-markup", TRUE,
                                                   "label", header_text,

                                                   "xalign", 0.0,
                                                   NULL);
        g_free(header_text);


        prefs_dialog->timeout_adjust = g_object_new(GTK_TYPE_ADJUSTMENT,
                                                    "value", 2.0,
                                                    "lower", 1.5,
                                                    "upper", 10.0,
                                                    "step-increment", 0.5,
                                                    "page-increment", 1.0,
                                                    "page-size", 0.0,
                                                    NULL);

        prefs_dialog->timeout_spinbutton = g_object_new(GTK_TYPE_SPIN_BUTTON,
                                                        "adjustment", prefs_dialog->timeout_adjust,
                                                        "climb-rate", 0.5,
                                                        "digits", 1,
                                                        "value", (gdouble) g_settings_get_int(sensors_applet->settings, TIMEOUT) / 1000.0,
                                                        "width-chars", 4,
                                                        NULL);


        prefs_dialog->timeout_label = g_object_new(GTK_TYPE_LABEL,
                                                   "use-underline", TRUE,
                                                   "label", _("Update _interval (secs)"),
                                                   "mnemonic-widget", prefs_dialog->timeout_spinbutton,
                                                   "xalign", 0.0,
                                                   NULL);

        g_signal_connect(prefs_dialog->timeout_spinbutton, "value-changed",
                         G_CALLBACK(prefs_dialog_timeout_changed),
                         prefs_dialog);

#ifdef HAVE_LIBNOTIFY
        header_text = g_markup_printf_escaped("<b>%s</b>", _("Notifications"));
        prefs_dialog->notifications_header = g_object_new(GTK_TYPE_LABEL,
                                                          "use-markup", TRUE,
                                                          "label", header_text,

                                                          "xalign", 0.0,
                                                          NULL);
        g_free(header_text);

        prefs_dialog->display_notifications = g_object_new(GTK_TYPE_CHECK_BUTTON,
                                                           "use-underline", TRUE,
                                                           "label", _("Display _notifications"),
                                                           NULL);
        gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(prefs_dialog->display_notifications),
                                     g_settings_get_boolean(sensors_applet->settings,
                                                            DISPLAY_NOTIFICATIONS));
        g_signal_connect(prefs_dialog->display_notifications,
                         "toggled",
                         G_CALLBACK(prefs_dialog_display_notifications_toggled),
                         prefs_dialog);
#endif

        /* SIZE AND LAYOUT */
        /* keep all widgets same size */
        prefs_dialog->size_group = gtk_size_group_new(GTK_SIZE_GROUP_HORIZONTAL);

        gtk_size_group_add_widget(prefs_dialog->size_group,
                                  GTK_WIDGET(prefs_dialog->display_mode_combo_box));

        gtk_size_group_add_widget(prefs_dialog->size_group,
                                  GTK_WIDGET(prefs_dialog->layout_mode_combo_box));

        gtk_size_group_add_widget(prefs_dialog->size_group,
                                  GTK_WIDGET(prefs_dialog->temperature_scale_combo_box));

        gtk_size_group_add_widget(prefs_dialog->size_group,
                                  GTK_WIDGET(prefs_dialog->timeout_spinbutton));

        g_object_unref(prefs_dialog->size_group);

        prefs_dialog->globals_table = g_object_new(GTK_TYPE_TABLE,
                                                   "homogeneous", FALSE,
                                                   "n-columns", 3,
#ifdef HAVE_LIBNOTIFY
                                                   "n-rows", 9,
#else
                                                   "n-rows", 7,
#endif
                                                   "row-spacing", 6,
                                                   "column-spacing", 12,
                                                   NULL);


        gtk_table_attach(prefs_dialog->globals_table,
                         GTK_WIDGET(prefs_dialog->display_header),
                         0, 2,
                         0, 1,
                         GTK_FILL,
                         GTK_FILL,
                         0,
                         0);

        gtk_table_attach(prefs_dialog->globals_table,
                         GTK_WIDGET(prefs_dialog->display_mode_label),
                         1, 2,
                         1, 2,
                         GTK_FILL,
                         GTK_FILL,
                         0,
                         0);

        gtk_table_attach(prefs_dialog->globals_table,
                         GTK_WIDGET(prefs_dialog->display_mode_combo_box),
                         2, 3,
                         1, 2,
                         GTK_FILL,
                         GTK_FILL,
                         0,
                         0);


        gtk_table_attach(prefs_dialog->globals_table,
                         GTK_WIDGET(prefs_dialog->layout_mode_label),
                         1, 2,
                         2, 3,
                         GTK_FILL,
                         GTK_FILL,
                         0,
                         0);
        gtk_table_attach(prefs_dialog->globals_table,
                         GTK_WIDGET(prefs_dialog->layout_mode_combo_box),
                         2, 3,
                         2, 3,
                         GTK_FILL,
                         GTK_FILL,
                         0,
                         0);



        gtk_table_attach(prefs_dialog->globals_table,
                         GTK_WIDGET(prefs_dialog->graph_size_label),
                         1, 2,
                         3, 4,
                         GTK_FILL,
                         GTK_FILL,
                         0,
                         0);

        gtk_table_attach(prefs_dialog->globals_table,
                         GTK_WIDGET(prefs_dialog->graph_size_spinbutton),
                         2, 3,
                         3, 4,
                         GTK_FILL,
                         GTK_FILL,
                         0,
                         0);

        gtk_table_attach(prefs_dialog->globals_table,
                         GTK_WIDGET(prefs_dialog->temperature_scale_label),
                         1, 2,
                         4, 5,
                         GTK_FILL,
                         GTK_FILL,
                         0,
                         0);
        gtk_table_attach(prefs_dialog->globals_table,
                         GTK_WIDGET(prefs_dialog->temperature_scale_combo_box),
                         2, 3,
                         4, 5,
                         GTK_FILL,
                         GTK_FILL,
                         0,
                         0);

        gtk_table_attach(prefs_dialog->globals_table,
                         GTK_WIDGET(prefs_dialog->update_header),
                         0, 2,
                         5, 6,
                         GTK_FILL,
                         GTK_FILL,
                         0,
                         0);

        gtk_table_attach(prefs_dialog->globals_table,
                         GTK_WIDGET(prefs_dialog->timeout_label),
                         1, 2,
                         6, 7,
                         GTK_FILL,
                         GTK_FILL,
                         0,
                         0);

        gtk_table_attach(prefs_dialog->globals_table,
                         GTK_WIDGET(prefs_dialog->timeout_spinbutton),
                         2, 3,
                         6, 7,
                         GTK_FILL,
                         GTK_FILL,
                         0,
                         0);


#ifdef HAVE_LIBNOTIFY
        gtk_table_attach(prefs_dialog->globals_table,
                         GTK_WIDGET(prefs_dialog->notifications_header),
                         0, 2,
                         7, 8,
                         GTK_FILL,
                         GTK_FILL,
                         0,
                         0);

        gtk_table_attach(prefs_dialog->globals_table,
                         GTK_WIDGET(prefs_dialog->display_notifications),
                         1, 2,
                         8, 9,
                         GTK_FILL,
                         GTK_FILL,
                         0,
                         0);
#endif


        prefs_dialog->view = g_object_new(GTK_TYPE_TREE_VIEW,
                                          "model", GTK_TREE_MODEL(sensors_applet->sensors),
                                          "rules-hint", TRUE,
                                          "reorderable", FALSE,
                                          "enable-search", TRUE,
                                          "search-column", LABEL_COLUMN,
                                          NULL);

        /* get double clicks on rows - do same as configure sensor
         * button clicks */
        g_signal_connect(prefs_dialog->view, "row-activated",
                         G_CALLBACK(prefs_dialog_row_activated),
                         prefs_dialog);

        prefs_dialog->id_renderer = gtk_cell_renderer_text_new();
        prefs_dialog->label_renderer = gtk_cell_renderer_text_new();
        g_object_set(prefs_dialog->label_renderer,
                     "editable", TRUE,
                     NULL);

        g_signal_connect(prefs_dialog->label_renderer, "edited",
                         G_CALLBACK(prefs_dialog_sensor_name_changed),
                         prefs_dialog);

        prefs_dialog->enable_renderer = gtk_cell_renderer_toggle_new();
        g_signal_connect(prefs_dialog->enable_renderer, "toggled",
                         G_CALLBACK(prefs_dialog_sensor_toggled),
                         prefs_dialog);
        prefs_dialog->icon_renderer = gtk_cell_renderer_pixbuf_new();

        prefs_dialog->id_column = gtk_tree_view_column_new_with_attributes(_("Sensor"),
                                                                           prefs_dialog->id_renderer,
                                                                           "text", ID_COLUMN,
                                                                           NULL);

        gtk_tree_view_column_set_min_width(prefs_dialog->id_column, 90);

        prefs_dialog->label_column = gtk_tree_view_column_new_with_attributes(_("Label"),
                                                                              prefs_dialog->label_renderer,
                                                                              "text", LABEL_COLUMN,
                                                                              "visible", VISIBLE_COLUMN,
                                                                              NULL);

        gtk_tree_view_column_set_min_width(prefs_dialog->label_column, 100);

        /* create the tooltip */
        gtk_widget_set_tooltip_text(GTK_WIDGET(prefs_dialog->view),
                                    _("Labels can be edited directly by clicking on them."));
        prefs_dialog->enable_column = gtk_tree_view_column_new_with_attributes(_("Enabled"),
                                                                               prefs_dialog->enable_renderer,
                                                                               "active", ENABLE_COLUMN,
                                                                               "visible", VISIBLE_COLUMN,
                                                                               NULL);

        prefs_dialog->icon_column = gtk_tree_view_column_new_with_attributes(_("Icon"),
                                                                             prefs_dialog->icon_renderer,
                                                                             "pixbuf", ICON_PIXBUF_COLUMN,
                                                                             "visible", VISIBLE_COLUMN,
                                                                             NULL);
        gtk_tree_view_append_column(prefs_dialog->view,
                                    prefs_dialog->id_column);
        gtk_tree_view_append_column(prefs_dialog->view,
                                    prefs_dialog->icon_column);
        gtk_tree_view_append_column(prefs_dialog->view,
                                    prefs_dialog->label_column);
        gtk_tree_view_append_column(prefs_dialog->view,
                                    prefs_dialog->enable_column);

        gtk_tree_view_columns_autosize(prefs_dialog->view);

        prefs_dialog->scrolled_window = g_object_new(GTK_TYPE_SCROLLED_WINDOW,
                                                     "hadjustment", NULL,
                                                     "height-request", 200,
                                                     "hscrollbar-policy", GTK_POLICY_AUTOMATIC,
                                                     "vadjustment",NULL,
                                                     "vscrollbar-policy", GTK_POLICY_AUTOMATIC,
                                                     NULL);

        gtk_container_add(GTK_CONTAINER(prefs_dialog->scrolled_window), GTK_WIDGET(prefs_dialog->view));

        /* GtkTree Selection */
        sensors_applet->selection = gtk_tree_view_get_selection(prefs_dialog->view);
        /* allow user to only select one row at a time at most */
        gtk_tree_selection_set_mode(sensors_applet->selection, GTK_SELECTION_SINGLE);
        /* when selection is changed, make sure sensor_config button is
           activated */

        /* Create buttons for user to interact with sensors tree */
        prefs_dialog->sensor_up_button = GTK_BUTTON(gtk_button_new_from_stock(GTK_STOCK_GO_UP));
        gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->sensor_up_button), FALSE);

        g_signal_connect(prefs_dialog->sensor_up_button, "clicked",
                         G_CALLBACK(prefs_dialog_sensor_up_button_clicked),
                         prefs_dialog);

        prefs_dialog->sensor_down_button = GTK_BUTTON(gtk_button_new_from_stock(GTK_STOCK_GO_DOWN));
        gtk_widget_set_sensitive(GTK_WIDGET(prefs_dialog->sensor_down_button), FALSE);

        g_signal_connect(prefs_dialog->sensor_down_button, "clicked",
                         G_CALLBACK(prefs_dialog_sensor_down_button_clicked),
                         prefs_dialog);


        prefs_dialog->buttons_box = GTK_VBUTTON_BOX(gtk_vbutton_box_new());

        gtk_button_box_set_layout(GTK_BUTTON_BOX(prefs_dialog->buttons_box),
                                  GTK_BUTTONBOX_SPREAD);

        gtk_box_pack_start(GTK_BOX(prefs_dialog->buttons_box), GTK_WIDGET(prefs_dialog->sensor_up_button), FALSE, FALSE, 0);

        gtk_box_pack_start(GTK_BOX(prefs_dialog->buttons_box), GTK_WIDGET(prefs_dialog->sensor_down_button), FALSE, FALSE, 0);

        prefs_dialog->sensors_hbox = g_object_new(GTK_TYPE_HBOX,
                                                  "border-width", 5,
                                                  "homogeneous", FALSE,
                                                  "spacing", 5,
                                                  NULL);

        gtk_box_pack_start(prefs_dialog->sensors_hbox,
                           GTK_WIDGET(prefs_dialog->scrolled_window),
                           TRUE, TRUE, 0); /* make sure window takes
                                            * up most of room */

        gtk_box_pack_start(prefs_dialog->sensors_hbox,
                           GTK_WIDGET(prefs_dialog->buttons_box),
                           FALSE, FALSE, 0);


        /* Sensor Config button */
        /* initially make button insensitive until user selects a row
           from the sensors tree */
        prefs_dialog->sensor_config_button = GTK_BUTTON(gtk_button_new_from_stock(GTK_STOCK_PROPERTIES));
        g_object_set(prefs_dialog->sensor_config_button,
                     "sensitive", FALSE,
                     NULL);


        g_signal_connect(sensors_applet->selection,
                         "changed",
                         G_CALLBACK(prefs_dialog_selection_changed),
                         prefs_dialog);

        /* pass selection to signal handler so we can give user a
           sensors_applet->prefs_dialog with the selected rows alarm
           value and enable */
        g_signal_connect(prefs_dialog->sensor_config_button, "clicked",
                         G_CALLBACK(prefs_dialog_sensor_config_button_clicked),
                         prefs_dialog);

        prefs_dialog->sensor_config_hbox = g_object_new(GTK_TYPE_HBOX,
                                                        "border-width", 5,
                                                        "homogeneous", FALSE,
                                                        "spacing", 0,
                                                        NULL);
        gtk_box_pack_end(prefs_dialog->sensor_config_hbox,
                         GTK_WIDGET(prefs_dialog->sensor_config_button),
                         FALSE, FALSE, 0);

        /* pack sensors_vbox */
        prefs_dialog->sensors_vbox = g_object_new(GTK_TYPE_VBOX,
                                                  "border-width", 5,
                                                  "homogeneous", FALSE,
                                                  "spacing", 0,
                                                  NULL);

        gtk_box_pack_start(prefs_dialog->sensors_vbox,
                           GTK_WIDGET(prefs_dialog->sensors_hbox),
                           TRUE, TRUE, 0);
        gtk_box_pack_start(prefs_dialog->sensors_vbox,
                           GTK_WIDGET(prefs_dialog->sensor_config_hbox),
                           FALSE, FALSE, 0);

        prefs_dialog->globals_alignment = g_object_new(GTK_TYPE_ALIGNMENT,
                                                       "xalign", 0.5,
                                                       "yalign", 0.0,
                                                       "top-padding", 12,
                                                       "left-padding", 12,
                                                       "bottom-padding", 12,
                                                       "right-padding", 12,
                                                       NULL);
        gtk_container_add(GTK_CONTAINER(prefs_dialog->globals_alignment),
                          GTK_WIDGET(prefs_dialog->globals_table));

        prefs_dialog->notebook = g_object_new(GTK_TYPE_NOTEBOOK,
                                              NULL);

        gtk_notebook_append_page(prefs_dialog->notebook,
                                 GTK_WIDGET(prefs_dialog->globals_alignment),
                                 gtk_label_new(_("General Options")));

        gtk_notebook_append_page(prefs_dialog->notebook,
                                 GTK_WIDGET(prefs_dialog->sensors_vbox),
                                 gtk_label_new(_("Sensors")));

        /* pack notebook into prefs_dialog */
        content_area = gtk_dialog_get_content_area (prefs_dialog->dialog);
        gtk_box_pack_start (GTK_BOX(content_area),
                            GTK_WIDGET(prefs_dialog->notebook), TRUE, TRUE, 0);


        gtk_widget_show_all(GTK_WIDGET(prefs_dialog->dialog));
}
