src/viktrwlayer_geotag.c

   1 /* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
   2 /*
   3  * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
   4  *
   5  * Copyright (C) 2011, Rob Norris <rw_norris@hotmail.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  */
  22 /*
  23  *  Similar to the track and trackpoint properties dialogs,
  24  *   this is made a separate file for ease of grouping related stuff together
  25  */
  26 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29 #include <math.h>
  30 #include <time.h>
  31 #include <string.h>
  32 #include <stdlib.h>
  33 #include <gtk/gtk.h>
  34 #include <glib/gi18n.h>
  35 #include "viking.h"
  36 #include "vikfilelist.h"
  37 #include "geotag_exif.h"
  38 #include "thumbnails.h"
  39 #include "background.h"
  40
  41 // Function taken from GPSCorrelate 1.6.1
  42 // ConvertToUnixTime Copyright 2005 Daniel Foote. GPL2+
  43
  44 #define EXIF_DATE_FORMAT "%d:%d:%d %d:%d:%d"
  45
  46 time_t ConvertToUnixTime(char* StringTime, char* Format, int TZOffsetHours, int TZOffsetMinutes)
  47 {
  48         /* Read the time using the specified format.
  49          * The format and string being read from must
  50          * have the most significant time on the left,
  51          * and the least significant on the right:
  52          * ie, Year on the left, seconds on the right. */
  53
  54         /* Sanity check... */
  55         if (StringTime == NULL || Format == NULL)
  56         {
  57                 return 0;
  58         }
  59
  60         /* Define and set up our structure. */
  61         struct tm Time;
  62         Time.tm_wday = 0;
  63         Time.tm_yday = 0;
  64         Time.tm_isdst = -1;
  65
  66         /* Read out the time from the string using our format. */
  67         sscanf(StringTime, Format, &Time.tm_year, &Time.tm_mon,
  68                         &Time.tm_mday, &Time.tm_hour,
  69                         &Time.tm_min, &Time.tm_sec);
  70
  71         /* Adjust the years for the mktime function to work. */
  72         Time.tm_year -= 1900;
  73         Time.tm_mon  -= 1;
  74
  75         /* Add our timezone offset to the time.
  76          * We don't check to see if it overflowed anything;
  77          * mktime does this and fixes it for us. */
  78         /* Note also that we SUBTRACT these times. We want the
  79          * result to be in UTC. */
  80
  81         Time.tm_hour -= TZOffsetHours;
  82         Time.tm_min  -= TZOffsetMinutes;
  83
  84         /* Calculate and return the unix time. */
  85         return mktime(&Time);
  86 }
  87
  88 // GPSCorrelate END
  89
  90 typedef struct {
  91         GtkWidget *dialog;
  92         VikFileList *files;
  93         VikTrwLayer *vtl;    // to pass on
  94         VikTrack *track;     // Use specified track or all tracks if NULL
  95         GtkCheckButton *create_waypoints_b;
  96         GtkLabel *overwrite_waypoints_l; // Referenced so the sensitivity can be changed
  97         GtkCheckButton *overwrite_waypoints_b;
  98         GtkCheckButton *write_exif_b;
  99         GtkLabel *overwrite_gps_exif_l; // Referenced so the sensitivity can be changed
 100         GtkCheckButton *overwrite_gps_exif_b;
 101         GtkLabel *no_change_mtime_l; // Referenced so the sensitivity can be changed
 102         GtkCheckButton *no_change_mtime_b;
 103         GtkCheckButton *interpolate_segments_b;
 104         GtkEntry *time_zone_b; // TODO consider a more user friendly tz widget eg libtimezonemap or similar
 105         GtkEntry *time_offset_b;
 106 } GeoTagWidgets;
 107
 108 static GeoTagWidgets *geotag_widgets_new()
 109 {
 110         GeoTagWidgets *widgets = g_malloc0(sizeof(GeoTagWidgets));
 111         return widgets;
 112 }
 113
 114 static void geotag_widgets_free ( GeoTagWidgets *widgets )
 115 {
 116         // Need to free VikFileList??
 117         g_free(widgets);
 118 }
 119
 120 typedef struct {
 121         gboolean create_waypoints;
 122         gboolean overwrite_waypoints;
 123         gboolean write_exif;
 124         gboolean overwrite_gps_exif;
 125         gboolean no_change_mtime;
 126         gboolean interpolate_segments;
 127         gint time_offset;
 128         gint TimeZoneHours;
 129         gint TimeZoneMins;
 130 } option_values_t;
 131
 132 typedef struct {
 133         VikTrwLayer *vtl;
 134         gchar *image;
 135         VikTrack *track;     // Use specified track or all tracks if NULL
 136         // User options...
 137         option_values_t ov;
 138         GList *files;
 139         time_t PhotoTime;
 140         // Store answer from interpolation for an image
 141         gboolean found_match;
 142         VikCoord coord;
 143         gdouble altitude;
 144         // If anything has changed
 145         gboolean redraw;
 146 } geotag_options_t;
 147
 148 static option_values_t default_values = {
 149         TRUE,
 150         TRUE,
 151         TRUE,
 152         FALSE,
 153         TRUE,
 154         TRUE,
 155         0,
 156         0,
 157         0,
 158 };
 159
 160 /**
 161  * Correlate the image against the specified track
 162  */
 163 static void trw_layer_geotag_track ( const gchar *name, VikTrack *track, geotag_options_t *options )
 164 {
 165         // If already found match then don't need to check this track
 166         if ( options->found_match )
 167                 return;
 168
 169         VikTrackpoint *trkpt;
 170         VikTrackpoint *trkpt_next;
 171
 172         GList *mytrkpt = track->trackpoints;
 173         for ( mytrkpt = mytrkpt; mytrkpt; mytrkpt = mytrkpt->next ) {
 174
 175                 // Do something for this trackpoint...
 176
 177                 trkpt = VIK_TRACKPOINT(mytrkpt->data);
 178
 179                 // is it exactly this point?
 180                 if ( options->PhotoTime == trkpt->timestamp ) {
 181                         options->coord = trkpt->coord;
 182                         options->altitude = trkpt->altitude;
 183                         options->found_match = TRUE;
 184                         break;
 185                 }
 186
 187                 // Now need two trackpoints, hence check next is available
 188                 if ( !mytrkpt->next ) break;
 189                 trkpt_next = VIK_TRACKPOINT(mytrkpt->next->data);
 190
 191                 // TODO need to use 'has_timestamp' property
 192                 if ( trkpt->timestamp == trkpt_next->timestamp ) continue;
 193                 if ( trkpt->timestamp > trkpt_next->timestamp ) continue;
 194
 195                 // When interpolating between segments, no need for any special segment handling
 196                 if ( !options->ov.interpolate_segments )
 197                         // Don't check between segments
 198                         if ( trkpt_next->newsegment )
 199                                 // Simply move on to consider next point
 200                                 continue;
 201
 202                 // Too far
 203                 if ( trkpt->timestamp > options->PhotoTime ) break;
 204
 205                 // Is is between this and the next point?
 206                 if ( (options->PhotoTime > trkpt->timestamp) && (options->PhotoTime < trkpt_next->timestamp) ) {
 207                         options->found_match = TRUE;
 208                         // Interpolate
 209                         /* Calculate the "scale": a decimal giving the relative distance
 210                          * in time between the two points. Ie, a number between 0 and 1 -
 211                          * 0 is the first point, 1 is the next point, and 0.5 would be
 212                          * half way. */
 213                         gdouble scale = (gdouble)trkpt_next->timestamp - (gdouble)trkpt->timestamp;
 214                         scale = ((gdouble)options->PhotoTime - (gdouble)trkpt->timestamp) / scale;
 215
 216                         struct LatLon ll_result, ll1, ll2;
 217
 218                         vik_coord_to_latlon ( &(trkpt->coord), &ll1 );
 219                         vik_coord_to_latlon ( &(trkpt_next->coord), &ll2 );
 220
 221                         ll_result.lat = ll1.lat + ((ll2.lat - ll1.lat) * scale);
 222
 223                         // NB This won't cope with going over the 180 degrees longitude boundary
 224                         ll_result.lon = ll1.lon + ((ll2.lon - ll1.lon) * scale);
 225
 226                         // set coord
 227                         vik_coord_load_from_latlon ( &(options->coord), VIK_COORD_LATLON, &ll_result );
 228
 229                         // Interpolate elevation
 230                         options->altitude = trkpt->altitude + ((trkpt_next->altitude - trkpt->altitude) * scale);
 231                         break;
 232                 }
 233
 234         }
 235 }
 236
 237 /**
 238  * Correlate the image to any track within the TrackWaypoint layer
 239  */
 240 static void trw_layer_geotag_process ( geotag_options_t *options )
 241 {
 242         if ( !options->vtl || !IS_VIK_LAYER(options->vtl) )
 243                 return;
 244
 245         if ( !options->image )
 246                 return;
 247
 248         gboolean has_gps_exif = FALSE;
 249         gchar* datetime = a_geotag_get_exif_date_from_file ( options->image, &has_gps_exif );
 250
 251         if ( datetime ) {
 252
 253                 // If image already has gps info - don't attempt to change it.
 254                 if ( !options->ov.overwrite_gps_exif && has_gps_exif ) {
 255                         if ( options->ov.create_waypoints ) {
 256                                 // Create waypoint with file information
 257                                 gchar *name = NULL;
 258                                 VikWaypoint *wp = a_geotag_create_waypoint_from_file ( options->image, vik_trw_layer_get_coord_mode (options->vtl), &name );
 259                                 if ( !wp ) {
 260                                         // Couldn't create Waypoint
 261                                         g_free ( datetime );
 262                                         return;
 263                                 }
 264                                 if ( !name )
 265                                         name = g_strdup ( a_file_basename ( options->image ) );
 266
 267                                 gboolean updated_waypoint = FALSE;
 268
 269                                 if ( options->ov.overwrite_waypoints ) {
 270                                         VikWaypoint *current_wp = vik_trw_layer_get_waypoint ( options->vtl, name );
 271                                         if ( current_wp ) {
 272                                                 // Existing wp found, so set new position, comment and image
 273                                                 current_wp = a_geotag_waypoint_positioned ( options->image, wp->coord, wp->altitude, &name, current_wp );
 274                                                 updated_waypoint = TRUE;
 275                                         }
 276                                 }
 277
 278                                 if ( !updated_waypoint ) {
 279                                         vik_trw_layer_filein_add_waypoint ( options->vtl, name, wp );
 280                                 }
 281
 282                                 g_free ( name );
 283
 284                                 // Mark for redraw
 285                                 options->redraw = TRUE;
 286                         }
 287                         g_free ( datetime );
 288                         return;
 289                 }
 290
 291                 options->PhotoTime = ConvertToUnixTime ( datetime, EXIF_DATE_FORMAT, options->ov.TimeZoneHours, options->ov.TimeZoneMins);
 292                 g_free ( datetime );
 293
 294                 // Apply any offset
 295                 options->PhotoTime = options->PhotoTime + options->ov.time_offset;
 296
 297                 options->found_match = FALSE;
 298
 299                 if ( options->track ) {
 300                         // Single specified track
 301                         // NB Doesn't care about track name
 302                         trw_layer_geotag_track ( NULL, options->track, options );
 303                 }
 304                 else {
 305                         // Try all tracks
 306                         GHashTable *tracks = vik_trw_layer_get_tracks ( options->vtl );
 307                         if ( g_hash_table_size (tracks) > 0 ) {
 308                                 g_hash_table_foreach ( tracks, (GHFunc) trw_layer_geotag_track, options );
 309                         }
 310                 }
 311
 312                 // Match found ?
 313                 if ( options->found_match ) {
 314
 315                         if ( options->ov.create_waypoints ) {
 316
 317                                 gboolean updated_waypoint = FALSE;
 318
 319                                 if ( options->ov.overwrite_waypoints ) {
 320
 321                                         // Update existing WP
 322                                         // Find a WP with current name
 323                                         gchar *name = NULL;
 324                                         name = g_strdup ( a_file_basename ( options->image ) );
 325                                         VikWaypoint *wp = vik_trw_layer_get_waypoint ( options->vtl, name );
 326                                         if ( wp ) {
 327                                                 // Found, so set new position, comment and image
 328                                                 wp = a_geotag_waypoint_positioned ( options->image, options->coord, options->altitude, &name, wp );
 329                                                 updated_waypoint = TRUE;
 330                                         }
 331                                         g_free ( name );
 332                                 }
 333
 334                                 if ( !updated_waypoint ) {
 335                                         // Create waypoint with found position
 336                                         gchar *name = NULL;
 337                                         VikWaypoint *wp = a_geotag_waypoint_positioned ( options->image, options->coord, options->altitude, &name, NULL );
 338                                         if ( !name )
 339                                                 name = g_strdup ( a_file_basename ( options->image ) );
 340                                         vik_trw_layer_filein_add_waypoint ( options->vtl, name, wp );
 341                                         g_free ( name );
 342                                 }
 343
 344                                 // Mark for redraw
 345                                 options->redraw = TRUE;
 346                         }
 347
 348                         // Write EXIF if specified
 349                         if ( options->ov.write_exif ) {
 350                                 a_geotag_write_exif_gps ( options->image, options->coord, options->altitude, options->ov.no_change_mtime );
 351                         }
 352                 }
 353         }
 354 }
 355
 356 /*
 357  * Tidy up
 358  */
 359 static void trw_layer_geotag_thread_free ( geotag_options_t *gtd )
 360 {
 361         if ( gtd->files )
 362                 g_list_free ( gtd->files );
 363         g_free ( gtd );
 364 }
 365
 366 /**
 367  * Run geotagging process in a separate thread
 368  */
 369 static int trw_layer_geotag_thread ( geotag_options_t *options, gpointer threaddata )
 370 {
 371         guint total = g_list_length(options->files), done = 0;
 372
 373         // TODO decide how to report any issues to the user ...
 374
 375         // Foreach file attempt to geotag it
 376         while ( options->files ) {
 377                 options->image = (gchar *) ( options->files->data );
 378                 trw_layer_geotag_process ( options );
 379                 options->files = options->files->next;
 380
 381                 // Update thread progress and detect stop requests
 382                 int result = a_background_thread_progress ( threaddata, ((gdouble) ++done) / total );
 383                 if ( result != 0 )
 384                         return -1; /* Abort thread */
 385         }
 386
 387         if ( options->redraw ) {
 388                 if ( IS_VIK_LAYER(options->vtl) ) {
 389                         // Ensure any new images get shown
 390                         trw_layer_verify_thumbnails ( options->vtl, NULL ); // NB second parameter not used ATM
 391                         // Force redraw as verify only redraws if there are new thumbnails (they may already exist)
 392                         vik_layer_emit_update ( VIK_LAYER(options->vtl), TRUE ); // Update from background
 393                 }
 394         }
 395
 396         return 0;
 397 }
 398
 399 /**
 400  * Parse user input from dialog response
 401  */
 402 static void trw_layer_geotag_response_cb ( GtkDialog *dialog, gint resp, GeoTagWidgets *widgets )
 403 {
 404         switch (resp) {
 405     case GTK_RESPONSE_DELETE_EVENT: /* received delete event (not from buttons) */
 406     case GTK_RESPONSE_REJECT:
 407                 break;
 408         default: {
 409                 //GTK_RESPONSE_ACCEPT:
 410                 // Get options
 411                 geotag_options_t *options = g_malloc ( sizeof(geotag_options_t) );
 412                 options->vtl = widgets->vtl;
 413                 options->track = widgets->track;
 414                 // Values extracted from the widgets:
 415                 options->ov.create_waypoints = gtk_toggle_button_get_active ( GTK_TOGGLE_BUTTON(widgets->create_waypoints_b) );
 416                 options->ov.overwrite_waypoints = gtk_toggle_button_get_active ( GTK_TOGGLE_BUTTON(widgets->overwrite_waypoints_b) );
 417                 options->ov.write_exif = gtk_toggle_button_get_active ( GTK_TOGGLE_BUTTON(widgets->write_exif_b) );
 418                 options->ov.overwrite_gps_exif = gtk_toggle_button_get_active ( GTK_TOGGLE_BUTTON(widgets->overwrite_gps_exif_b) );
 419                 options->ov.no_change_mtime = gtk_toggle_button_get_active ( GTK_TOGGLE_BUTTON(widgets->no_change_mtime_b) );
 420                 options->ov.interpolate_segments = gtk_toggle_button_get_active ( GTK_TOGGLE_BUTTON(widgets->interpolate_segments_b) );
 421                 options->ov.TimeZoneHours = 0;
 422                 options->ov.TimeZoneMins = 0;
 423                 const gchar* TZString = gtk_entry_get_text(GTK_ENTRY(widgets->time_zone_b));
 424                 /* Check the string. If there is a colon, then (hopefully) it's a time in xx:xx format.
 425                  * If not, it's probably just a +/-xx format. In all other cases,
 426                  * it will be interpreted as +/-xx, which, if given a string, returns 0. */
 427                 if (strstr(TZString, ":")) {
 428                         /* Found colon. Split into two. */
 429                         sscanf(TZString, "%d:%d", &options->ov.TimeZoneHours, &options->ov.TimeZoneMins);
 430                         if (options->ov.TimeZoneHours < 0)
 431                                 options->ov.TimeZoneMins *= -1;
 432                 } else {
 433                         /* No colon. Just parse. */
 434                         options->ov.TimeZoneHours = atoi(TZString);
 435                 }
 436                 options->ov.time_offset = atoi ( gtk_entry_get_text ( GTK_ENTRY(widgets->time_offset_b) ) );
 437
 438                 options->redraw = FALSE;
 439
 440                 // Save settings for reuse
 441                 default_values = options->ov;
 442
 443                 options->files = g_list_copy ( vik_file_list_get_files ( widgets->files ) );
 444
 445                 gint len = g_list_length ( options->files );
 446                 gchar *tmp = g_strdup_printf ( _("Geotagging %d Images..."), len );
 447
 448                 // Processing lots of files can take time - so run a background effort
 449                 a_background_thread ( VIK_GTK_WINDOW_FROM_LAYER(options->vtl),
 450                                                           tmp,
 451                                                           (vik_thr_func) trw_layer_geotag_thread,
 452                                                           options,
 453                                                           (vik_thr_free_func) trw_layer_geotag_thread_free,
 454                                                           NULL,
 455                                                           len );
 456
 457                 g_free ( tmp );
 458
 459                 break;
 460         }
 461         }
 462         geotag_widgets_free ( widgets );
 463         gtk_widget_destroy ( GTK_WIDGET(dialog) );
 464 }
 465
 466 /**
 467  * Handle widget sensitivities
 468  */
 469 static void write_exif_b_cb ( GtkWidget *gw, GeoTagWidgets *gtw )
 470 {
 471         // Overwriting & file modification times are irrelevant if not going to write EXIF!
 472         if ( gtk_toggle_button_get_active ( GTK_TOGGLE_BUTTON(gtw->write_exif_b) ) ) {
 473                 gtk_widget_set_sensitive ( GTK_WIDGET(gtw->overwrite_gps_exif_b), TRUE );
 474                 gtk_widget_set_sensitive ( GTK_WIDGET(gtw->overwrite_gps_exif_l), TRUE );
 475                 gtk_widget_set_sensitive ( GTK_WIDGET(gtw->no_change_mtime_b), TRUE );
 476                 gtk_widget_set_sensitive ( GTK_WIDGET(gtw->no_change_mtime_l), TRUE );
 477         }
 478         else {
 479                 gtk_widget_set_sensitive ( GTK_WIDGET(gtw->overwrite_gps_exif_b), FALSE );
 480                 gtk_widget_set_sensitive ( GTK_WIDGET(gtw->overwrite_gps_exif_l), FALSE );
 481                 gtk_widget_set_sensitive ( GTK_WIDGET(gtw->no_change_mtime_b), FALSE );
 482                 gtk_widget_set_sensitive ( GTK_WIDGET(gtw->no_change_mtime_l), FALSE );
 483         }
 484 }
 485
 486 static void create_waypoints_b_cb ( GtkWidget *gw, GeoTagWidgets *gtw )
 487 {
 488         // Overwriting waypoints are irrelevant if not going to create them!
 489         if ( gtk_toggle_button_get_active ( GTK_TOGGLE_BUTTON(gtw->create_waypoints_b) ) ) {
 490                 gtk_widget_set_sensitive ( GTK_WIDGET(gtw->overwrite_waypoints_b), TRUE );
 491                 gtk_widget_set_sensitive ( GTK_WIDGET(gtw->overwrite_waypoints_l), TRUE );
 492         }
 493         else {
 494                 gtk_widget_set_sensitive ( GTK_WIDGET(gtw->overwrite_waypoints_b), FALSE );
 495                 gtk_widget_set_sensitive ( GTK_WIDGET(gtw->overwrite_waypoints_l), FALSE );
 496         }
 497 }
 498
 499 /**
 500  * trw_layer_geotag_dialog:
 501  * @parent: The Window of the calling process
 502  * @vtl: The VikTrwLayer to use for correlating images to tracks
 503  * @track: Optional - The particular track to use (if specified) for correlating images
 504  * @track_name: Optional - The name of specified track to use
 505  */
 506 void trw_layer_geotag_dialog ( GtkWindow *parent, VikTrwLayer *vtl, VikTrack *track, const gchar *track_name )
 507 {
 508         GeoTagWidgets *widgets = geotag_widgets_new();
 509
 510         widgets->dialog = gtk_dialog_new_with_buttons ( _("Geotag Images"),
 511                                                                                                         parent,
 512                                                                                                         GTK_DIALOG_DESTROY_WITH_PARENT,
 513                                                                                                         GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT,
 514                                                                                                         GTK_STOCK_OK,     GTK_RESPONSE_ACCEPT,
 515                                                                                                         NULL );
 516         widgets->files = VIK_FILE_LIST(vik_file_list_new ( _("Images") )); // TODO would be nice to be able to set a filefilter
 517         widgets->vtl = vtl;
 518         widgets->track = track;
 519         widgets->create_waypoints_b = GTK_CHECK_BUTTON ( gtk_check_button_new () );
 520         widgets->overwrite_waypoints_l = GTK_LABEL ( gtk_label_new ( _("Overwrite Existing Waypoints:") ) );
 521         widgets->overwrite_waypoints_b = GTK_CHECK_BUTTON ( gtk_check_button_new () );
 522         widgets->write_exif_b = GTK_CHECK_BUTTON ( gtk_check_button_new () );
 523         widgets->overwrite_gps_exif_l = GTK_LABEL ( gtk_label_new ( _("Overwrite Existing GPS Information:") ) );
 524         widgets->overwrite_gps_exif_b = GTK_CHECK_BUTTON ( gtk_check_button_new () );
 525         widgets->no_change_mtime_l = GTK_LABEL ( gtk_label_new ( _("Keep File Modification Timestamp:") ) );
 526         widgets->no_change_mtime_b = GTK_CHECK_BUTTON ( gtk_check_button_new () );
 527         widgets->interpolate_segments_b = GTK_CHECK_BUTTON ( gtk_check_button_new () );
 528         widgets->time_zone_b = GTK_ENTRY ( gtk_entry_new () );
 529         widgets->time_offset_b = GTK_ENTRY ( gtk_entry_new () );
 530
 531         gtk_entry_set_width_chars ( widgets->time_zone_b, 7);
 532         gtk_entry_set_width_chars ( widgets->time_offset_b, 7);
 533
 534         // Defaults - TODO restore previous values / save settings somewhere??
 535         gtk_toggle_button_set_active ( GTK_TOGGLE_BUTTON(widgets->create_waypoints_b), default_values.create_waypoints );
 536         gtk_toggle_button_set_active ( GTK_TOGGLE_BUTTON(widgets->overwrite_waypoints_b), default_values.overwrite_waypoints );
 537         gtk_toggle_button_set_active ( GTK_TOGGLE_BUTTON(widgets->write_exif_b), default_values.write_exif );
 538         gtk_toggle_button_set_active ( GTK_TOGGLE_BUTTON(widgets->overwrite_gps_exif_b), default_values.overwrite_gps_exif );
 539         gtk_toggle_button_set_active ( GTK_TOGGLE_BUTTON(widgets->no_change_mtime_b), default_values.no_change_mtime );
 540         gtk_toggle_button_set_active ( GTK_TOGGLE_BUTTON(widgets->interpolate_segments_b), default_values.interpolate_segments );
 541         gchar tmp_string[7];
 542         snprintf (tmp_string, 7, "%+02d:%02d", default_values.TimeZoneHours, abs (default_values.TimeZoneMins) );
 543         gtk_entry_set_text ( widgets->time_zone_b, tmp_string );
 544         snprintf (tmp_string, 7, "%d", default_values.time_offset );
 545         gtk_entry_set_text ( widgets->time_offset_b, tmp_string );
 546
 547         // Ensure sensitivities setup
 548         write_exif_b_cb ( GTK_WIDGET(widgets->write_exif_b), widgets );
 549         g_signal_connect ( G_OBJECT(widgets->write_exif_b), "toggled", G_CALLBACK(write_exif_b_cb), widgets );
 550
 551         create_waypoints_b_cb ( GTK_WIDGET(widgets->create_waypoints_b), widgets );
 552         g_signal_connect ( G_OBJECT(widgets->create_waypoints_b), "toggled", G_CALLBACK(create_waypoints_b_cb), widgets );
 553
 554         GtkWidget *cw_hbox = gtk_hbox_new ( FALSE, 0 );
 555         gtk_box_pack_start ( GTK_BOX(cw_hbox), gtk_label_new ( _("Create Waypoints:") ), FALSE, FALSE, 5 );
 556         gtk_box_pack_start ( GTK_BOX(cw_hbox), GTK_WIDGET(widgets->create_waypoints_b), FALSE, FALSE, 5 );
 557
 558         GtkWidget *ow_hbox = gtk_hbox_new ( FALSE, 0 );
 559         gtk_box_pack_start ( GTK_BOX(ow_hbox), GTK_WIDGET(widgets->overwrite_waypoints_l), FALSE, FALSE, 5 );
 560         gtk_box_pack_start ( GTK_BOX(ow_hbox), GTK_WIDGET(widgets->overwrite_waypoints_b), FALSE, FALSE, 5 );
 561
 562         GtkWidget *we_hbox = gtk_hbox_new ( FALSE, 0 );
 563         gtk_box_pack_start ( GTK_BOX(we_hbox), gtk_label_new ( _("Write EXIF:") ), FALSE, FALSE, 5 );
 564         gtk_box_pack_start ( GTK_BOX(we_hbox), GTK_WIDGET(widgets->write_exif_b), FALSE, FALSE, 5 );
 565
 566         GtkWidget *og_hbox = gtk_hbox_new ( FALSE, 0 );
 567         gtk_box_pack_start ( GTK_BOX(og_hbox), GTK_WIDGET(widgets->overwrite_gps_exif_l), FALSE, FALSE, 5 );
 568         gtk_box_pack_start ( GTK_BOX(og_hbox), GTK_WIDGET(widgets->overwrite_gps_exif_b), FALSE, FALSE, 5 );
 569
 570         GtkWidget *fm_hbox = gtk_hbox_new ( FALSE, 0 );
 571         gtk_box_pack_start ( GTK_BOX(fm_hbox), GTK_WIDGET(widgets->no_change_mtime_l), FALSE, FALSE, 5 );
 572         gtk_box_pack_start ( GTK_BOX(fm_hbox), GTK_WIDGET(widgets->no_change_mtime_b), FALSE, FALSE, 5 );
 573
 574         GtkWidget *is_hbox = gtk_hbox_new ( FALSE, 0 );
 575         gtk_box_pack_start ( GTK_BOX(is_hbox), gtk_label_new ( _("Interpolate Between Track Segments:") ), FALSE, FALSE, 5 );
 576         gtk_box_pack_start ( GTK_BOX(is_hbox), GTK_WIDGET(widgets->interpolate_segments_b), FALSE, FALSE, 5 );
 577
 578         GtkWidget *to_hbox = gtk_hbox_new ( FALSE, 0 );
 579         gtk_box_pack_start ( GTK_BOX(to_hbox), gtk_label_new ( _("Image Time Offset (Seconds):") ), FALSE, FALSE, 5 );
 580         gtk_box_pack_start ( GTK_BOX(to_hbox), GTK_WIDGET(widgets->time_offset_b), FALSE, FALSE, 5 );
 581         gtk_widget_set_tooltip_text ( GTK_WIDGET(widgets->time_offset_b), _("The number of seconds to ADD to the photos time to make it match the GPS data. Calculate this with (GPS - Photo). Can be negative or positive. Useful to adjust times when a camera's timestamp was incorrect.") );
 582
 583         GtkWidget *tz_hbox = gtk_hbox_new ( FALSE, 0 );
 584         gtk_box_pack_start ( GTK_BOX(tz_hbox), gtk_label_new ( _("Image Timezone:") ), FALSE, FALSE, 5 );
 585         gtk_box_pack_start ( GTK_BOX(tz_hbox), GTK_WIDGET(widgets->time_zone_b), FALSE, FALSE, 5 );
 586         gtk_widget_set_tooltip_text ( GTK_WIDGET(widgets->time_zone_b), _("The timezone that was used when the images were created. For example, if a camera is set to AWST or +8:00 hours. Enter +8:00 here so that the correct adjustment to the images' time can be made. GPS data is always in UTC.") );
 587
 588         gchar *track_string = NULL;
 589         if ( widgets->track )
 590                 track_string = g_strdup_printf ( _("Using track: %s"), track_name );
 591         else
 592                 track_string = g_strdup_printf ( _("Using all tracks in: %s"), VIK_LAYER(widgets->vtl)->name );
 593
 594         gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(widgets->dialog)->vbox), gtk_label_new ( track_string ), FALSE, FALSE, 5 );
 595
 596         gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(widgets->dialog)->vbox), GTK_WIDGET(widgets->files), TRUE, TRUE, 0 );
 597
 598         gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(widgets->dialog)->vbox), cw_hbox,  FALSE, FALSE, 0);
 599         gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(widgets->dialog)->vbox), ow_hbox,  FALSE, FALSE, 0);
 600         gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(widgets->dialog)->vbox), we_hbox,  FALSE, FALSE, 0);
 601         gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(widgets->dialog)->vbox), og_hbox,  FALSE, FALSE, 0);
 602         gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(widgets->dialog)->vbox), fm_hbox,  FALSE, FALSE, 0);
 603         gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(widgets->dialog)->vbox), is_hbox,  FALSE, FALSE, 0);
 604         gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(widgets->dialog)->vbox), to_hbox,  FALSE, FALSE, 0);
 605         gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(widgets->dialog)->vbox), tz_hbox,  FALSE, FALSE, 0);
 606
 607         g_signal_connect ( widgets->dialog, "response", G_CALLBACK(trw_layer_geotag_response_cb), widgets );
 608
 609         gtk_dialog_set_default_response ( GTK_DIALOG(widgets->dialog), GTK_RESPONSE_REJECT );
 610
 611         gtk_widget_show_all ( widgets->dialog );
 612
 613         g_free ( track_string );
 614 }