aboutsummaryrefslogblamecommitdiffstats
path: root/widgets/e-timezone-dialog/e-timezone-dialog.c
blob: c5ccfd3a4c93073ba4116f3defee1ea6839b3595 (plain) (tree)
1
2
3
4
5
6
7
8
9
  
                                                                


                                                               


                                                                  
                                                                    


                                                                   
                                                                             





                                                        
  

   
                    
                   

      
                 

                       
                       
                                    
                                          
 
                          

                                  

                              
                 
               
               

                  
                  
      





                                                                           




                                                              



                                                                
                                
                                                                           
                                        
                           
 
                            
 







                                                          
                                      
                       
                         
                              
                                  
                                 

  
                                                                         





                                                                        


                                                                         






                                                                           
                                                                      
                                                                        

                                                                        
                                                                       
                                                                       
 
                                                                    
                                                                          
                                                                    
                                                                         
 
                                                               
                                                                            
 
                                                                 




                                                          
                                   
 

                                                                          

                                                           





                                                         
                                                        

 
                                          
           
                                           
 

                                     
                                                      
 
                                        


                                               
         
 




                                                   


                                               

         

                                                                          

 




                                                      





                                     
               


                         




                                                      
                                


                                                       
                                                               





                                                                          
                                                                   
         



















                                                                                        


                                                       












                                                                                         

 



                                                  
                          








                                                                

                                                                             

                                 


                                                                            


                           




                                                                      
 

                                     
 
                                                                 
 
                                                               
                                                      

                                                             

                                              


                                                                  


                                                                  















                                                             
 



                   
                             


                    
     
           
                       
 
                                                 
                             
                  
 







                                   
      
 
                     
                         

                           
                        
 
                 


                                                         
                                                                    

                                                        

                          



                    







                                                                              
                            

                         
                                     
 




                                                                                



                                       

                                        

 












                                                                          
                                                                              


                                                                     
           

                                   
 
































                                                                         

 
              

                                                  
                                  

                               
                    

                                 
 

                                                 
                                                               

                                           
 



                                                             
                                                                

 
                    

                                      
                                  
 






                                                             












                                                              
                                                             
                                                           
                                                                            

                                                                                         
                                                                            




                                                                                         
               


                                     


                                     
                                    
                               
                              
 


                                       
                                                                                 


                                                                           
                                                                         





                                                                                     
                                                                         

                                                                                    

                                                                
                                                           
                                                                      
 
                         
 


                    
               


                                      


                                     



                                       
                                                                          

                                                                      


                                               
                                                                           
                                                                         

                                                                                     

                                                                             
                                                                 
 

                                 


                     
               


                                                     


                                     
 




                                                                             
                                     
                                      
                                                                                    










                                                                               
               


                                             


                                     
                                    
 


                                       
                                                                                 
                                                      
 
                                 
                                           

                                                               
                                                                     
                                                          
 
                                         
                                                              


                                                                                             
 
                                                                             

                                                                                     
         
 


                    
                                                                   
                           
                     
                                          
                                      
 
                         
                                    
               
 
                          
                            


                                                                




                                                      
                                                      



                                                                   
 



                                                          
                 
                                    


                 
                                       

 








                                                                         


                                     



                                                                
                          

 








                                                                    
 
    
                                                     
                                                   

                                     
                              
 

                                                      
                  
                                             

                 
                                                               
 

                         
                          
 
                                                            
                                                 

                                                                             
 
                                     
                         

 
           
                                                     










                                                                
           

                                       

                                     
                         
                                              


                         








                                                                   







                                                                                     
           

                                         
 
                                     
                                   

                                      

                        


                         

                                                                      


                                  
                                                           







                                                                           
                                                                        




                                                      
 
                                         
 
 
           

                                                        






                                                     
                                                         
                                                                         
            


                                
               

                                                       







                                                                                  
                                    






                                                               
           

                                          
 
 

                                            
                                                   



                                     
/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Damon Chaplin <damon@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <time.h>
#include <string.h>
#include <glib/gi18n.h>
#include <misc/e-map.h>
#include <libecal/e-cal-time-util.h>
#include <libecal/e-cal-system-timezone.h>

#include "e-util/e-util.h"
#include "e-util/e-util-private.h"

#include "e-timezone-dialog.h"

#ifdef G_OS_WIN32
#ifdef gmtime_r
#undef gmtime_r
#endif
#ifdef localtime_r
#undef localtime_r
#endif

/* The gmtime() and localtime() in Microsoft's C library are MT-safe */
#define gmtime_r(tp,tmp) (gmtime(tp)?(*(tmp)=*gmtime(tp),(tmp)):0)
#define localtime_r(tp,tmp) (localtime(tp)?(*(tmp)=*localtime(tp),(tmp)):0)
#endif

#define E_TIMEZONE_DIALOG_MAP_POINT_NORMAL_RGBA 0xc070a0ff
#define E_TIMEZONE_DIALOG_MAP_POINT_HOVER_RGBA 0xffff60ff
#define E_TIMEZONE_DIALOG_MAP_POINT_SELECTED_1_RGBA 0xff60e0ff
#define E_TIMEZONE_DIALOG_MAP_POINT_SELECTED_2_RGBA 0x000000ff

#define E_TIMEZONE_DIALOG_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_TIMEZONE_DIALOG, ETimezoneDialogPrivate))

struct _ETimezoneDialogPrivate {
    /* The selected timezone. May be NULL for a 'local time' (i.e. when
     * the displayed name is ""). */
    icaltimezone *zone;

    GtkBuilder *builder;

    EMapPoint *point_selected;
    EMapPoint *point_hover;

    EMap *map;

    /* The timeout used to flash the nearest point. */
    guint timeout_id;

    /* Widgets from the UI file */
    GtkWidget *app;
    GtkWidget *table;
    GtkWidget *map_window;
    GtkWidget *timezone_combo;
    GtkWidget *preview_label;
};

static void e_timezone_dialog_dispose       (GObject    *object);

static gboolean get_widgets         (ETimezoneDialog *etd);
static gboolean on_map_timeout          (gpointer    data);
static gboolean on_map_motion           (GtkWidget  *widget,
                         GdkEventMotion *event,
                         gpointer    data);
static gboolean on_map_leave            (GtkWidget  *widget,
                         GdkEventCrossing *event,
                         gpointer    data);
static gboolean on_map_visibility_changed   (GtkWidget  *w,
                         GdkEventVisibility *event,
                         gpointer    data);
static gboolean on_map_button_pressed       (GtkWidget  *w,
                         GdkEventButton *event,
                         gpointer    data);

static icaltimezone * get_zone_from_point   (ETimezoneDialog *etd,
                         EMapPoint  *point);
static void set_map_timezone        (ETimezoneDialog *etd,
                         icaltimezone    *zone);
static void on_combo_changed        (GtkComboBox    *combo,
                         ETimezoneDialog *etd);

static void timezone_combo_get_active_text  (GtkComboBox *combo,
                         const gchar **zone_name);
static gboolean timezone_combo_set_active_text  (GtkComboBox *combo,
                         const gchar *zone_name);

static void map_destroy_cb          (gpointer data,
                         GObject *where_object_was);

G_DEFINE_TYPE (ETimezoneDialog, e_timezone_dialog, G_TYPE_OBJECT)

/* Class initialization function for the event editor */
static void
e_timezone_dialog_class_init (ETimezoneDialogClass *class)
{
    GObjectClass *object_class;

    g_type_class_add_private (class, sizeof (ETimezoneDialogPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->dispose  = e_timezone_dialog_dispose;
}

/* Object initialization function for the event editor */
static void
e_timezone_dialog_init (ETimezoneDialog *etd)
{
    etd->priv = E_TIMEZONE_DIALOG_GET_PRIVATE (etd);
}

/* Dispose handler for the event editor */
static void
e_timezone_dialog_dispose (GObject *object)
{
    ETimezoneDialogPrivate *priv;

    priv = E_TIMEZONE_DIALOG_GET_PRIVATE (object);

    /* Destroy the actual dialog. */
    if (priv->app != NULL) {
        gtk_widget_destroy (priv->app);
        priv->app = NULL;
    }

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

    if (priv->builder) {
        g_object_unref (priv->builder);
        priv->builder = NULL;
    }

    /* Chain up to parent's dispose() method. */
    G_OBJECT_CLASS (e_timezone_dialog_parent_class)->dispose (object);
}

static void
e_timezone_dialog_add_timezones (ETimezoneDialog *etd)
{
    ETimezoneDialogPrivate *priv;
    icalarray *zones;
    GtkComboBox *combo;
    GList *l, *list_items = NULL;
    GtkListStore *list_store;
    GtkTreeIter iter;
    GtkCellRenderer *cell;
    GHashTable *index;
    gint i;

    priv = etd->priv;

    /* Get the array of builtin timezones. */
    zones = icaltimezone_get_builtin_timezones ();

    for (i = 0; i < zones->num_elements; i++) {
        icaltimezone *zone;
        gchar *location;

        zone = icalarray_element_at (zones, i);

        location = _(icaltimezone_get_location (zone));

        e_map_add_point (priv->map, location,
                 icaltimezone_get_longitude (zone),
                 icaltimezone_get_latitude (zone),
                 E_TIMEZONE_DIALOG_MAP_POINT_NORMAL_RGBA);

        list_items = g_list_prepend (list_items, location);
    }

    list_items = g_list_sort (list_items, (GCompareFunc) g_utf8_collate);

    /* Put the "UTC" entry at the top of the combo's list. */
    list_items = g_list_prepend (list_items, _("UTC"));

    combo = GTK_COMBO_BOX (priv->timezone_combo);

    cell = gtk_cell_renderer_text_new ();
    gtk_cell_layout_pack_start ((GtkCellLayout *) combo, cell, TRUE);
    gtk_cell_layout_set_attributes ((GtkCellLayout *) combo, cell, "text", 0, NULL);

    list_store = gtk_list_store_new (1, G_TYPE_STRING);
    index = g_hash_table_new (g_str_hash, g_str_equal);
    for (l = list_items, i = 0; l != NULL; l = l->next, ++i) {
        gtk_list_store_append (list_store, &iter);
        gtk_list_store_set (list_store, &iter, 0, (gchar *)(l->data), -1);
        g_hash_table_insert (index, (gchar *)(l->data), GINT_TO_POINTER (i));
    }

    g_object_set_data_full (
        G_OBJECT (list_store), "index", index,
        (GDestroyNotify) g_hash_table_destroy);

    gtk_combo_box_set_model (combo, (GtkTreeModel *) list_store);

    gtk_rc_parse_string (
        "style \"e-timezone-combo-style\" {\n"
        "  GtkComboBox::appears-as-list = 1\n"
        "}\n"
        "\n"
        "widget \"*.e-timezone-dialog-combo\" style \"e-timezone-combo-style\"");

    gtk_widget_set_name (priv->timezone_combo, "e-timezone-dialog-combo");

    g_list_free (list_items);
}

ETimezoneDialog *
e_timezone_dialog_construct (ETimezoneDialog *etd)
{
    ETimezoneDialogPrivate *priv;
    GtkWidget *widget;
    GtkWidget *map;

    g_return_val_if_fail (etd != NULL, NULL);
    g_return_val_if_fail (E_IS_TIMEZONE_DIALOG (etd), NULL);

    priv = etd->priv;

    /* Load the content widgets */

    priv->builder = gtk_builder_new ();
    e_load_ui_builder_definition (priv->builder, "e-timezone-dialog.ui");

    if (!get_widgets (etd)) {
        g_message (
            "%s(): Could not find all widgets in the XML file!",
            G_STRFUNC);
        goto error;
    }

    widget = gtk_dialog_get_content_area (GTK_DIALOG (priv->app));
    gtk_container_set_border_width (GTK_CONTAINER (widget), 0);

    widget = gtk_dialog_get_action_area (GTK_DIALOG (priv->app));
    gtk_container_set_border_width (GTK_CONTAINER (widget), 12);

    priv->map = e_map_new ();
    map = GTK_WIDGET (priv->map);

    g_object_weak_ref (G_OBJECT (map), map_destroy_cb, priv);

    gtk_widget_set_events (map, gtk_widget_get_events (map)
                   | GDK_LEAVE_NOTIFY_MASK
                   | GDK_VISIBILITY_NOTIFY_MASK);

    e_timezone_dialog_add_timezones (etd);

    gtk_container_add (GTK_CONTAINER (priv->map_window), map);
    gtk_widget_show (map);

    /* Ensure a reasonable minimum amount of map is visible */
    gtk_widget_set_size_request (priv->map_window, 200, 200);

    g_signal_connect (
        map, "motion-notify-event",
        G_CALLBACK (on_map_motion), etd);
    g_signal_connect (
        map, "leave-notify-event",
        G_CALLBACK (on_map_leave), etd);
    g_signal_connect (
        map, "visibility-notify-event",
        G_CALLBACK (on_map_visibility_changed), etd);
    g_signal_connect (
        map, "button-press-event",
        G_CALLBACK (on_map_button_pressed), etd);

    g_signal_connect (
        priv->timezone_combo, "changed",
        G_CALLBACK (on_combo_changed), etd);

    return etd;

 error:

    g_object_unref (etd);
    return NULL;
}

#if 0
static gint
get_local_offset (void)
{
    time_t now = time (NULL), t_gmt, t_local;
    struct tm gmt, local;
    gint diff;

    gmtime_r (&now, &gmt);
    localtime_r (&now, &local);
    t_gmt = mktime (&gmt);
    t_local = mktime (&local);
    diff = t_local - t_gmt;

    return diff;
}
#endif

static icaltimezone *
get_local_timezone (void)
{
    icaltimezone *zone;
    gchar *location;

    tzset ();
    location = e_cal_system_timezone_get_location ();

    if (location)
        zone = icaltimezone_get_builtin_timezone (location);
    else
        zone = icaltimezone_get_utc_timezone ();

    g_free (location);

    return zone;
}

/* Gets the widgets from the XML file and returns if they are all available.
 * For the widgets whose values can be simply set with e-dialog-utils, it does
 * that as well.
 */
static gboolean
get_widgets (ETimezoneDialog *etd)
{
    ETimezoneDialogPrivate *priv;
    GtkBuilder *builder;

    priv = etd->priv;
    builder = etd->priv->builder;

    priv->app = e_builder_get_widget (builder, "timezone-dialog");
    priv->map_window = e_builder_get_widget (builder, "map-window");
    priv->timezone_combo = e_builder_get_widget (builder, "timezone-combo");
    priv->table = e_builder_get_widget (builder, "timezone-table");
    priv->preview_label = e_builder_get_widget (builder, "preview-label");

    return (priv->app
        && priv->map_window
        && priv->timezone_combo
        && priv->table
        && priv->preview_label);
}

/**
 * e_timezone_dialog_new:
 *
 * Creates a new event editor dialog.
 *
 * Return value: A newly-created event editor dialog, or NULL if the event
 * editor could not be created.
 **/
ETimezoneDialog *
e_timezone_dialog_new (void)
{
    ETimezoneDialog *etd;

    etd = E_TIMEZONE_DIALOG (g_object_new (E_TYPE_TIMEZONE_DIALOG, NULL));
    return e_timezone_dialog_construct (E_TIMEZONE_DIALOG (etd));
}

static void
format_utc_offset (gint utc_offset,
                   gchar *buffer)
{
    const gchar *sign = "+";
    gint hours, minutes, seconds;

    if (utc_offset < 0) {
        utc_offset = -utc_offset;
        sign = "-";
    }

    hours = utc_offset / 3600;
    minutes = (utc_offset % 3600) / 60;
    seconds = utc_offset % 60;

    /* Sanity check. Standard timezone offsets shouldn't be much more
     * than 12 hours, and daylight saving shouldn't change it by more
     * than a few hours.  (The maximum offset is 15 hours 56 minutes
     * at present.) */
    if (hours < 0 || hours >= 24 || minutes < 0 || minutes >= 60
        || seconds < 0 || seconds >= 60) {
        fprintf (
            stderr, "Warning: Strange timezone offset: "
            "H:%i M:%i S:%i\n", hours, minutes, seconds);
    }

    if (hours == 0 && minutes == 0 && seconds == 0)
        strcpy (buffer, _("UTC"));
    else if (seconds == 0)
        sprintf (
            buffer, "%s %s%02i:%02i",
            _("UTC"), sign, hours, minutes);
    else
        sprintf (
            buffer, "%s %s%02i:%02i:%02i",
            _("UTC"), sign, hours, minutes, seconds);
}

static gchar *
zone_display_name_with_offset (icaltimezone *zone)
{
    const gchar *display_name;
    struct tm local;
    struct icaltimetype tt;
    gint offset;
    gchar buffer[100];
    time_t now = time (NULL);

    gmtime_r ((const time_t *) &now, &local);
    tt = tm_to_icaltimetype (&local, TRUE);
    offset = icaltimezone_get_utc_offset (zone, &tt, NULL);

    format_utc_offset (offset, buffer);

    display_name = icaltimezone_get_display_name (zone);
    if (icaltimezone_get_builtin_timezone (display_name))
        display_name = _(display_name);

    return g_strdup_printf("%s (%s)", display_name, buffer);
}

static const gchar *
zone_display_name (icaltimezone *zone)
{
    const gchar *display_name;

    display_name = icaltimezone_get_display_name (zone);
    if (icaltimezone_get_builtin_timezone (display_name))
        display_name = _(display_name);

    return display_name;
}

/* This flashes the currently selected timezone in the map. */
static gboolean
on_map_timeout (gpointer data)
{
    ETimezoneDialog *etd;
    ETimezoneDialogPrivate *priv;

    etd = E_TIMEZONE_DIALOG (data);
    priv = etd->priv;

    if (!priv->point_selected)
        return TRUE;

    if (e_map_point_get_color_rgba (priv->point_selected)
        == E_TIMEZONE_DIALOG_MAP_POINT_SELECTED_1_RGBA)
        e_map_point_set_color_rgba (priv->map, priv->point_selected,
                        E_TIMEZONE_DIALOG_MAP_POINT_SELECTED_2_RGBA);
    else
        e_map_point_set_color_rgba (priv->map, priv->point_selected,
                        E_TIMEZONE_DIALOG_MAP_POINT_SELECTED_1_RGBA);

    return TRUE;
}

static gboolean
on_map_motion (GtkWidget *widget,
               GdkEventMotion *event,
               gpointer data)
{
    ETimezoneDialog *etd;
    ETimezoneDialogPrivate *priv;
    gdouble longitude, latitude;
    icaltimezone *new_zone;
    gchar *display = NULL;

    etd = E_TIMEZONE_DIALOG (data);
    priv = etd->priv;

    e_map_window_to_world (priv->map, (gdouble) event->x, (gdouble) event->y,
                   &longitude, &latitude);

    if (priv->point_hover && priv->point_hover != priv->point_selected)
        e_map_point_set_color_rgba (priv->map, priv->point_hover,
                        E_TIMEZONE_DIALOG_MAP_POINT_NORMAL_RGBA);

    priv->point_hover = e_map_get_closest_point (priv->map, longitude,
                             latitude, TRUE);

    if (priv->point_hover != priv->point_selected)
        e_map_point_set_color_rgba (priv->map, priv->point_hover,
                        E_TIMEZONE_DIALOG_MAP_POINT_HOVER_RGBA);

    new_zone = get_zone_from_point (etd, priv->point_hover);

    display = zone_display_name_with_offset (new_zone);
    gtk_label_set_text (GTK_LABEL (priv->preview_label), display);

    g_free (display);

    return TRUE;
}

static gboolean
on_map_leave (GtkWidget *widget,
              GdkEventCrossing *event,
              gpointer data)
{
    ETimezoneDialog *etd;
    ETimezoneDialogPrivate *priv;

    etd = E_TIMEZONE_DIALOG (data);
    priv = etd->priv;

    /* We only want to reset the hover point if this is a normal leave
     * event. For some reason we are getting leave events when the
     * button is pressed in the map, which causes problems. */
    if (event->mode != GDK_CROSSING_NORMAL)
        return FALSE;

    if (priv->point_hover && priv->point_hover != priv->point_selected)
        e_map_point_set_color_rgba (priv->map, priv->point_hover,
                        E_TIMEZONE_DIALOG_MAP_POINT_NORMAL_RGBA);

    timezone_combo_set_active_text (GTK_COMBO_BOX (priv->timezone_combo),
                    zone_display_name (priv->zone));
    gtk_label_set_text (GTK_LABEL (priv->preview_label), "");

    priv->point_hover = NULL;

    return FALSE;
}

static gboolean
on_map_visibility_changed (GtkWidget *w,
                           GdkEventVisibility *event,
                           gpointer data)
{
    ETimezoneDialog *etd;
    ETimezoneDialogPrivate *priv;

    etd = E_TIMEZONE_DIALOG (data);
    priv = etd->priv;

    if (event->state != GDK_VISIBILITY_FULLY_OBSCURED) {
        /* Map is visible, at least partly, so make sure we flash the
         * selected point. */
        if (!priv->timeout_id)
            priv->timeout_id = g_timeout_add (100, on_map_timeout, etd);
    } else {
        /* Map is invisible, so don't waste resources on the timeout.*/
        if (priv->timeout_id) {
            g_source_remove (priv->timeout_id);
            priv->timeout_id = 0;
        }
    }

    return FALSE;
}

static gboolean
on_map_button_pressed (GtkWidget *w,
                       GdkEventButton *event,
                       gpointer data)
{
    ETimezoneDialog *etd;
    ETimezoneDialogPrivate *priv;
    gdouble longitude, latitude;

    etd = E_TIMEZONE_DIALOG (data);
    priv = etd->priv;

    e_map_window_to_world (priv->map, (gdouble) event->x, (gdouble) event->y,
                   &longitude, &latitude);

    if (event->button != 1) {
        e_map_zoom_out (priv->map);
    } else {
        if (e_map_get_magnification (priv->map) <= 1.0)
            e_map_zoom_to_location (priv->map, longitude,
                        latitude);

        if (priv->point_selected)
            e_map_point_set_color_rgba (priv->map,
                            priv->point_selected,
                            E_TIMEZONE_DIALOG_MAP_POINT_NORMAL_RGBA);
        priv->point_selected = priv->point_hover;

        priv->zone = get_zone_from_point (etd, priv->point_selected);
        timezone_combo_set_active_text (GTK_COMBO_BOX (priv->timezone_combo),
                        zone_display_name (priv->zone));
    }

    return TRUE;
}

/* Returns the translated timezone location of the given EMapPoint,
 * e.g. "Europe/London". */
static icaltimezone *
get_zone_from_point (ETimezoneDialog *etd,
                     EMapPoint *point)
{
    icalarray *zones;
    gdouble longitude, latitude;
    gint i;

    if (point == NULL)
        return NULL;

    e_map_point_get_location (point, &longitude, &latitude);

    /* Get the array of builtin timezones. */
    zones = icaltimezone_get_builtin_timezones ();

    for (i = 0; i < zones->num_elements; i++) {
        icaltimezone *zone;
        gdouble zone_longitude, zone_latitude;

        zone = icalarray_element_at (zones, i);
        zone_longitude = icaltimezone_get_longitude (zone);
        zone_latitude = icaltimezone_get_latitude (zone);

        if (zone_longitude - 0.005 <= longitude &&
            zone_longitude + 0.005 >= longitude &&
            zone_latitude - 0.005 <= latitude &&
            zone_latitude + 0.005 >= latitude)
        {
            return zone;
        }
    }

    g_return_val_if_reached (NULL);
}

/**
 * e_timezone_dialog_get_timezone:
 * @etd: the timezone dialog
 *
 * Return value: the currently-selected timezone, or %NULL if no timezone
 * is selected.
 **/
icaltimezone *
e_timezone_dialog_get_timezone (ETimezoneDialog *etd)
{
    ETimezoneDialogPrivate *priv;

    g_return_val_if_fail (E_IS_TIMEZONE_DIALOG (etd), NULL);

    priv = etd->priv;

    return priv->zone;
}

/**
 * e_timezone_dialog_set_timezone:
 * @etd: the timezone dialog
 * @zone: the timezone
 *
 * Sets the timezone of @etd to @zone. Updates the display name and
 * selected location. The caller must ensure that @zone is not freed
 * before @etd is destroyed.
 **/

void
e_timezone_dialog_set_timezone (ETimezoneDialog *etd,
                                icaltimezone *zone)
{
    ETimezoneDialogPrivate *priv;
    gchar *display = NULL;

    g_return_if_fail (E_IS_TIMEZONE_DIALOG (etd));

    if (!zone)
        zone = get_local_timezone ();

    if (zone)
        display = zone_display_name_with_offset (zone);

    priv = etd->priv;

    priv->zone = zone;

    gtk_label_set_text (GTK_LABEL (priv->preview_label),
                zone ? display : "");
    timezone_combo_set_active_text (GTK_COMBO_BOX (priv->timezone_combo),
                    zone ? zone_display_name(zone) : "");

    set_map_timezone (etd, zone);
    g_free (display);
}

GtkWidget *
e_timezone_dialog_get_toplevel (ETimezoneDialog *etd)
{
    ETimezoneDialogPrivate *priv;

    g_return_val_if_fail (etd != NULL, NULL);
    g_return_val_if_fail (E_IS_TIMEZONE_DIALOG (etd), NULL);

    priv = etd->priv;

    return priv->app;
}

static void
set_map_timezone (ETimezoneDialog *etd,
                  icaltimezone *zone)
{
    ETimezoneDialogPrivate *priv;
    EMapPoint *point;
    gdouble zone_longitude, zone_latitude;

    priv = etd->priv;

    if (zone) {
        zone_longitude = icaltimezone_get_longitude (zone);
        zone_latitude = icaltimezone_get_latitude (zone);
        point = e_map_get_closest_point (priv->map,
                         zone_longitude,
                         zone_latitude,
                         FALSE);
    } else
        point = NULL;

    if (priv->point_selected)
        e_map_point_set_color_rgba (priv->map, priv->point_selected,
                        E_TIMEZONE_DIALOG_MAP_POINT_NORMAL_RGBA);

    priv->point_selected = point;
}

static void
on_combo_changed (GtkComboBox *combo_box,
                  ETimezoneDialog *etd)
{
    ETimezoneDialogPrivate *priv;
    const gchar *new_zone_name;
    icalarray *zones;
    icaltimezone *map_zone = NULL;
    gchar *location;
    gint i;

    priv = etd->priv;

    timezone_combo_get_active_text (
        GTK_COMBO_BOX (priv->timezone_combo), &new_zone_name);

    if (!*new_zone_name)
        priv->zone = NULL;
    else if (!g_utf8_collate (new_zone_name, _("UTC")))
        priv->zone = icaltimezone_get_utc_timezone ();
    else {
        priv->zone = NULL;

        zones = icaltimezone_get_builtin_timezones ();
        for (i = 0; i < zones->num_elements; i++) {
            map_zone = icalarray_element_at (zones, i);
            location = _(icaltimezone_get_location (map_zone));
            if (!g_utf8_collate (new_zone_name, location)) {
                priv->zone = map_zone;
                break;
            }
        }
    }

    set_map_timezone (etd, map_zone);
}

static void
timezone_combo_get_active_text (GtkComboBox *combo,
                                const gchar **zone_name)
{
    GtkTreeModel *list_store;
    GtkTreeIter iter;

    list_store = gtk_combo_box_get_model (combo);

    /* Get the active iter in the list */
    if (gtk_combo_box_get_active_iter (combo, &iter))
        gtk_tree_model_get (list_store, &iter, 0, zone_name, -1);
    else
        *zone_name = "";
}

static gboolean
timezone_combo_set_active_text (GtkComboBox *combo,
                                const gchar *zone_name)
{
    GtkTreeModel *list_store;
    GHashTable *index;
    gpointer id = NULL;

    list_store = gtk_combo_box_get_model (combo);
    index = (GHashTable *) g_object_get_data (G_OBJECT (list_store), "index");

    if (zone_name && *zone_name)
        id = g_hash_table_lookup (index, zone_name);

    gtk_combo_box_set_active (combo, GPOINTER_TO_INT (id));

    return (id != NULL);
}

static void
map_destroy_cb (gpointer data,
                GObject *where_object_was)
{

    ETimezoneDialogPrivate *priv = data;
    if (priv->timeout_id) {
        g_source_remove (priv->timeout_id);
        priv->timeout_id = 0;
    }
    return;
}