Pileus Git - aweather/blob - src/plugins/radar.c

   1 /*
   2  * Copyright (C) 2009-2012 Andy Spencer <andy753421@gmail.com>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #define _XOPEN_SOURCE
  19 #include <time.h>
  20 #include <config.h>
  21 #include <glib/gstdio.h>
  22 #include <gtk/gtk.h>
  23 #include <gio/gio.h>
  24 #include <math.h>
  25 #include <rsl.h>
  26
  27 #include <grits.h>
  28
  29 #include "radar.h"
  30 #include "level2.h"
  31 #include "../aweather-location.h"
  32
  33 #include "../compat.h"
  34
  35 static void aweather_bin_set_child(GtkBin *bin, GtkWidget *new)
  36 {
  37         GtkWidget *old = gtk_bin_get_child(bin);
  38         if (old)
  39                 gtk_widget_destroy(old);
  40         gtk_container_add(GTK_CONTAINER(bin), new);
  41         gtk_widget_show_all(new);
  42 }
  43
  44 static gchar *_find_nearest(time_t time, GList *files,
  45                 gsize offset)
  46 {
  47         g_debug("RadarSite: find_nearest ...");
  48         time_t  nearest_time = 0;
  49         char   *nearest_file = NULL;
  50
  51         struct tm tm = {};
  52         for (GList *cur = files; cur; cur = cur->next) {
  53                 gchar *file = cur->data;
  54                 sscanf(file+offset, "%4d%2d%2d_%2d%2d",
  55                                 &tm.tm_year, &tm.tm_mon, &tm.tm_mday,
  56                                 &tm.tm_hour, &tm.tm_min);
  57                 tm.tm_year -= 1900;
  58                 tm.tm_mon  -= 1;
  59                 if (ABS(time - mktime(&tm)) <
  60                     ABS(time - nearest_time)) {
  61                         nearest_file = file;
  62                         nearest_time = mktime(&tm);
  63                 }
  64         }
  65
  66         g_debug("RadarSite: find_nearest = %s", nearest_file);
  67         if (nearest_file)
  68                 return g_strdup(nearest_file);
  69         else
  70                 return NULL;
  71 }
  72
  73
  74 /**************
  75  * RadarSites *
  76  **************/
  77 typedef enum {
  78         STATUS_UNLOADED,
  79         STATUS_LOADING,
  80         STATUS_LOADED,
  81 } RadarSiteStatus;
  82 struct _RadarSite {
  83         /* Information */
  84         city_t         *city;
  85         GritsMarker    *marker;      // Map marker for grits
  86
  87         /* Stuff from the parents */
  88         GritsViewer    *viewer;
  89         GritsHttp      *http;
  90         GritsPrefs     *prefs;
  91         GtkWidget      *pconfig;
  92
  93         /* When loaded */
  94         gboolean        hidden;
  95         RadarSiteStatus status;      // Loading status for the site
  96         GtkWidget      *config;
  97         AWeatherLevel2 *level2;      // The Level2 structure for the current volume
  98
  99         /* Internal data */
 100         time_t          time;        // Current timestamp of the level2
 101         gchar          *message;     // Error message set while updating
 102         guint           time_id;     // "time-changed"     callback ID
 103         guint           refresh_id;  // "refresh"          callback ID
 104         guint           location_id; // "locaiton-changed" callback ID
 105         guint           idle_source; // _site_update_end idle source
 106 };
 107
 108 /* format: http://mesonet.agron.iastate.edu/data/nexrd2/raw/KABR/KABR_20090510_0323 */
 109 void _site_update_loading(gchar *file, goffset cur,
 110                 goffset total, gpointer _site)
 111 {
 112         RadarSite *site = _site;
 113         GtkWidget *progress_bar = gtk_bin_get_child(GTK_BIN(site->config));
 114         double percent = (double)cur/total;
 115         gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(progress_bar), MIN(percent, 1.0));
 116         gchar *msg = g_strdup_printf("Loading... %5.1f%% (%.2f/%.2f MB)",
 117                         percent*100, (double)cur/1000000, (double)total/1000000);
 118         gtk_progress_bar_set_text(GTK_PROGRESS_BAR(progress_bar), msg);
 119         g_free(msg);
 120 }
 121 gboolean _site_update_end(gpointer _site)
 122 {
 123         RadarSite *site = _site;
 124         if (site->message) {
 125                 g_warning("RadarSite: update_end - %s", site->message);
 126                 const char *fmt = "http://forecast.weather.gov/product.php?site=NWS&product=FTM&format=TXT&issuedby=%s";
 127                 char       *uri = g_strdup_printf(fmt, site->city->code+1);
 128                 GtkWidget  *box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
 129                 GtkWidget  *msg = gtk_label_new(site->message);
 130                 GtkWidget  *btn = gtk_link_button_new_with_label(uri, "View Radar Status");
 131                 gtk_box_set_homogeneous(GTK_BOX(box), TRUE);
 132                 gtk_box_pack_start(GTK_BOX(box), msg, TRUE, TRUE, 0);
 133                 gtk_box_pack_start(GTK_BOX(box), btn, TRUE, TRUE, 0);
 134                 aweather_bin_set_child(GTK_BIN(site->config), box);
 135                 g_free(uri);
 136         } else {
 137                 aweather_bin_set_child(GTK_BIN(site->config),
 138                                 aweather_level2_get_config(site->level2));
 139         }
 140         site->status = STATUS_LOADED;
 141         site->idle_source = 0;
 142         return FALSE;
 143 }
 144 gpointer _site_update_thread(gpointer _site)
 145 {
 146         RadarSite *site = _site;
 147         g_debug("RadarSite: update_thread - %s", site->city->code);
 148         site->message = NULL;
 149
 150         gboolean offline = grits_viewer_get_offline(site->viewer);
 151         gchar *nexrad_url = grits_prefs_get_string(site->prefs,
 152                         "aweather/nexrad_url", NULL);
 153
 154         /* Find nearest volume (temporally) */
 155         g_debug("RadarSite: update_thread - find nearest - %s", site->city->code);
 156         gchar *dir_list = g_strconcat(nexrad_url, "/", site->city->code,
 157                         "/", "dir.list", NULL);
 158         GList *files = grits_http_available(site->http,
 159                         "^\\w{4}_\\d{8}_\\d{4}$", site->city->code,
 160                         "\\d+ (.*)", (offline ? NULL : dir_list));
 161         g_free(dir_list);
 162         gchar *nearest = _find_nearest(site->time, files, 5);
 163         g_list_foreach(files, (GFunc)g_free, NULL);
 164         g_list_free(files);
 165         if (!nearest) {
 166                 site->message = "No suitable files found";
 167                 goto out;
 168         }
 169
 170         /* Fetch new volume */
 171         g_debug("RadarSite: update_thread - fetch");
 172         gchar *local = g_strconcat(site->city->code, "/", nearest, NULL);
 173         gchar *uri   = g_strconcat(nexrad_url, "/", local,   NULL);
 174         gchar *file  = grits_http_fetch(site->http, uri, local,
 175                         offline ? GRITS_LOCAL : GRITS_UPDATE,
 176                         _site_update_loading, site);
 177         g_free(nexrad_url);
 178         g_free(nearest);
 179         g_free(local);
 180         g_free(uri);
 181         if (!file) {
 182                 site->message = "Fetch failed";
 183                 goto out;
 184         }
 185
 186         /* Load and add new volume */
 187         g_debug("RadarSite: update_thread - load - %s", site->city->code);
 188         site->level2 = aweather_level2_new_from_file(
 189                         file, site->city->code, colormaps);
 190         g_free(file);
 191         if (!site->level2) {
 192                 site->message = "Load failed";
 193                 goto out;
 194         }
 195         grits_object_hide(GRITS_OBJECT(site->level2), site->hidden);
 196         grits_viewer_add(site->viewer, GRITS_OBJECT(site->level2),
 197                         GRITS_LEVEL_WORLD+3, TRUE);
 198
 199 out:
 200         if (!site->idle_source)
 201                 site->idle_source = g_idle_add(_site_update_end, site);
 202         return NULL;
 203 }
 204 void _site_update(RadarSite *site)
 205 {
 206         if (site->status == STATUS_LOADING)
 207                 return;
 208         site->status = STATUS_LOADING;
 209
 210         site->time = grits_viewer_get_time(site->viewer);
 211         g_debug("RadarSite: update %s - %d",
 212                         site->city->code, (gint)site->time);
 213
 214         /* Add a progress bar */
 215         GtkWidget *progress = gtk_progress_bar_new();
 216         gtk_progress_bar_set_text(GTK_PROGRESS_BAR(progress), "Loading...");
 217         aweather_bin_set_child(GTK_BIN(site->config), progress);
 218
 219         /* Remove old volume */
 220         g_debug("RadarSite: update - remove - %s", site->city->code);
 221         if (site->level2) {
 222                 grits_viewer_remove(site->viewer, GRITS_OBJECT(site->level2));
 223                 site->level2 = NULL;
 224         }
 225
 226         /* Fork loading right away so updating the
 227          * list of times doesn't take too long */
 228         g_thread_new("site-update-thread", _site_update_thread, site);
 229 }
 230
 231 /* RadarSite methods */
 232 void radar_site_unload(RadarSite *site)
 233 {
 234         if (site->status != STATUS_LOADED)
 235                 return; // Abort if it's still loading
 236
 237         g_debug("RadarSite: unload %s", site->city->code);
 238
 239         if (site->time_id)
 240                 g_signal_handler_disconnect(site->viewer, site->time_id);
 241         if (site->refresh_id)
 242                 g_signal_handler_disconnect(site->viewer, site->refresh_id);
 243         if (site->idle_source)
 244                 g_source_remove(site->idle_source);
 245         site->idle_source = 0;
 246
 247         /* Remove tab */
 248         if (site->config)
 249                 gtk_widget_destroy(site->config);
 250
 251         /* Remove radar */
 252         if (site->level2) {
 253                 grits_viewer_remove(site->viewer, GRITS_OBJECT(site->level2));
 254                 site->level2 = NULL;
 255         }
 256
 257         site->status = STATUS_UNLOADED;
 258 }
 259
 260 void radar_site_load(RadarSite *site)
 261 {
 262         g_debug("RadarSite: load %s", site->city->code);
 263
 264         /* Add tab page */
 265         site->config = gtk_alignment_new(0, 0, 1, 1);
 266         g_object_set_data(G_OBJECT(site->config), "site", site);
 267         gtk_notebook_append_page(GTK_NOTEBOOK(site->pconfig), site->config,
 268                         gtk_label_new(site->city->name));
 269         gtk_widget_show_all(site->config);
 270         if (gtk_notebook_get_current_page(GTK_NOTEBOOK(site->pconfig)) == 0)
 271                 gtk_notebook_set_current_page(GTK_NOTEBOOK(site->pconfig), -1);
 272
 273         /* Set up radar loading */
 274         site->time_id = g_signal_connect_swapped(site->viewer, "time-changed",
 275                         G_CALLBACK(_site_update), site);
 276         site->refresh_id = g_signal_connect_swapped(site->viewer, "refresh",
 277                         G_CALLBACK(_site_update), site);
 278         _site_update(site);
 279 }
 280
 281 void _site_on_location_changed(GritsViewer *viewer,
 282                 gdouble lat, gdouble lon, gdouble elev,
 283                 gpointer _site)
 284 {
 285         static gdouble min_dist = EARTH_R / 30;
 286         RadarSite *site = _site;
 287
 288         /* Calculate distance, could cache xyz values */
 289         gdouble eye_xyz[3], site_xyz[3];
 290         lle2xyz(lat, lon, elev, &eye_xyz[0], &eye_xyz[1], &eye_xyz[2]);
 291         lle2xyz(site->city->pos.lat, site->city->pos.lon, site->city->pos.elev,
 292                         &site_xyz[0], &site_xyz[1], &site_xyz[2]);
 293         gdouble dist = distd(site_xyz, eye_xyz);
 294
 295         /* Load or unload the site if necessasairy */
 296         if (dist <= min_dist && dist < elev*1.25 && site->status == STATUS_UNLOADED)
 297                 radar_site_load(site);
 298         else if (dist > 2*min_dist &&  site->status != STATUS_UNLOADED)
 299                 radar_site_unload(site);
 300 }
 301
 302 static gboolean on_marker_clicked(GritsObject *marker, GdkEvent *event, RadarSite *site)
 303 {
 304         GritsViewer *viewer = site->viewer;
 305         GritsPoint center = marker->center;
 306         grits_viewer_set_location(viewer, center.lat, center.lon, EARTH_R/35);
 307         grits_viewer_set_rotation(viewer, 0, 0, 0);
 308         /* Recursivly set notebook tabs */
 309         GtkWidget *widget, *parent;
 310         for (widget = site->config; widget; widget = parent) {
 311                 parent = gtk_widget_get_parent(widget);
 312                 if (GTK_IS_NOTEBOOK(parent)) {
 313                         gint i = gtk_notebook_page_num(GTK_NOTEBOOK(parent), widget);
 314                         gtk_notebook_set_current_page(GTK_NOTEBOOK(parent), i);
 315                 }
 316         }
 317         return TRUE;
 318 }
 319
 320 RadarSite *radar_site_new(city_t *city, GtkWidget *pconfig,
 321                 GritsViewer *viewer, GritsPrefs *prefs, GritsHttp *http)
 322 {
 323         RadarSite *site = g_new0(RadarSite, 1);
 324         site->viewer  = g_object_ref(viewer);
 325         site->prefs   = g_object_ref(prefs);
 326         //site->http    = http;
 327         site->http    = grits_http_new(G_DIR_SEPARATOR_S
 328                         "nexrad" G_DIR_SEPARATOR_S
 329                         "level2" G_DIR_SEPARATOR_S);
 330         site->city    = city;
 331         site->pconfig = pconfig;
 332         site->hidden  = TRUE;
 333
 334         /* Set initial location */
 335         gdouble lat, lon, elev;
 336         grits_viewer_get_location(viewer, &lat, &lon, &elev);
 337         _site_on_location_changed(viewer, lat, lon, elev, site);
 338
 339         /* Add marker */
 340         site->marker = grits_marker_new(site->city->name);
 341         GRITS_OBJECT(site->marker)->center = site->city->pos;
 342         GRITS_OBJECT(site->marker)->lod    = EARTH_R*0.75*site->city->lod;
 343         grits_viewer_add(site->viewer, GRITS_OBJECT(site->marker),
 344                         GRITS_LEVEL_HUD, FALSE);
 345         g_signal_connect(site->marker, "clicked",
 346                         G_CALLBACK(on_marker_clicked), site);
 347         grits_object_set_cursor(GRITS_OBJECT(site->marker), GDK_HAND2);
 348
 349         /* Connect signals */
 350         site->location_id  = g_signal_connect(viewer, "location-changed",
 351                         G_CALLBACK(_site_on_location_changed), site);
 352         return site;
 353 }
 354
 355 void radar_site_free(RadarSite *site)
 356 {
 357         radar_site_unload(site);
 358         grits_viewer_remove(site->viewer, GRITS_OBJECT(site->marker));
 359         if (site->location_id)
 360                 g_signal_handler_disconnect(site->viewer, site->location_id);
 361         grits_http_free(site->http);
 362         g_object_unref(site->viewer);
 363         g_object_unref(site->prefs);
 364         g_free(site);
 365 }
 366
 367
 368 /**************
 369  * RadarConus *
 370  **************/
 371 #define CONUS_NORTH       50.406626367301044
 372 #define CONUS_WEST       -127.620375523875420
 373 #define CONUS_WIDTH       3400.0
 374 #define CONUS_HEIGHT      1600.0
 375 #define CONUS_DEG_PER_PX  0.017971305190311
 376
 377 struct _RadarConus {
 378         GritsViewer *viewer;
 379         GritsHttp   *http;
 380         GtkWidget   *config;
 381         time_t       time;
 382         const gchar *message;
 383         GMutex       loading;
 384
 385         gchar       *path;
 386         GritsTile   *tile[2];
 387
 388         guint        time_id;     // "time-changed"     callback ID
 389         guint        refresh_id;  // "refresh"          callback ID
 390         guint        idle_source; // _conus_update_end idle source
 391 };
 392
 393 void _conus_update_loading(gchar *file, goffset cur,
 394                 goffset total, gpointer _conus)
 395 {
 396         RadarConus *conus = _conus;
 397         GtkWidget *progress_bar = gtk_bin_get_child(GTK_BIN(conus->config));
 398         double percent = (double)cur/total;
 399         gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(progress_bar), MIN(percent, 1.0));
 400         gchar *msg = g_strdup_printf("Loading... %5.1f%% (%.2f/%.2f MB)",
 401                         percent*100, (double)cur/1000000, (double)total/1000000);
 402         gtk_progress_bar_set_text(GTK_PROGRESS_BAR(progress_bar), msg);
 403         g_free(msg);
 404 }
 405
 406 /* Copy images to graphics memory */
 407 static void _conus_update_end_copy(GritsTile *tile, guchar *pixels)
 408 {
 409         if (!tile->tex)
 410                 glGenTextures(1, &tile->tex);
 411
 412         gchar *clear = g_malloc0(2048*2048*4);
 413         glBindTexture(GL_TEXTURE_2D, tile->tex);
 414
 415         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 416         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 417         glTexImage2D(GL_TEXTURE_2D, 0, 4, 2048, 2048, 0,
 418                         GL_RGBA, GL_UNSIGNED_BYTE, clear);
 419         glTexSubImage2D(GL_TEXTURE_2D, 0, 1,1, CONUS_WIDTH/2,CONUS_HEIGHT,
 420                         GL_RGBA, GL_UNSIGNED_BYTE, pixels);
 421         tile->coords.n = 1.0/(CONUS_WIDTH/2);
 422         tile->coords.w = 1.0/ CONUS_HEIGHT;
 423         tile->coords.s = tile->coords.n +  CONUS_HEIGHT   / 2048.0;
 424         tile->coords.e = tile->coords.w + (CONUS_WIDTH/2) / 2048.0;
 425         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 426         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 427         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 428         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 429         glFlush();
 430         g_free(clear);
 431 }
 432
 433 /* Split the pixbuf into east and west halves (with 2K sides)
 434  * Also map the pixbuf's alpha values */
 435 static void _conus_update_end_split(guchar *pixels, guchar *west, guchar *east,
 436                 gint width, gint height, gint pxsize)
 437 {
 438         g_debug("Conus: update_end_split");
 439         guchar *out[] = {west,east};
 440         const guchar alphamap[][4] = {
 441                 {0x04, 0xe9, 0xe7, 0x30},
 442                 {0x01, 0x9f, 0xf4, 0x60},
 443                 {0x03, 0x00, 0xf4, 0x90},
 444         };
 445         for (int y = 0; y < height; y++)
 446         for (int x = 0; x < width;  x++) {
 447                 gint subx = x % (width/2);
 448                 gint idx  = x / (width/2);
 449                 guchar *src = &pixels[(y*width+x)*pxsize];
 450                 guchar *dst = &out[idx][(y*(width/2)+subx)*4];
 451                 if (src[0] > 0xe0 &&
 452                     src[1] > 0xe0 &&
 453                     src[2] > 0xe0) {
 454                         dst[3] = 0x00;
 455                 } else {
 456                         dst[0] = src[0];
 457                         dst[1] = src[1];
 458                         dst[2] = src[2];
 459                         dst[3] = 0xff * 0.75;
 460                         for (int j = 0; j < G_N_ELEMENTS(alphamap); j++)
 461                                 if (src[0] == alphamap[j][0] &&
 462                                     src[1] == alphamap[j][1] &&
 463                                     src[2] == alphamap[j][2])
 464                                         dst[3] = alphamap[j][3];
 465                 }
 466         }
 467 }
 468
 469 gboolean _conus_update_end(gpointer _conus)
 470 {
 471         RadarConus *conus = _conus;
 472         g_debug("Conus: update_end");
 473
 474         /* Check error status */
 475         if (conus->message) {
 476                 g_warning("Conus: update_end - %s", conus->message);
 477                 aweather_bin_set_child(GTK_BIN(conus->config), gtk_label_new(conus->message));
 478                 goto out;
 479         }
 480
 481         /* Load and pixbuf */
 482         GError *error = NULL;
 483         GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(conus->path, &error);
 484         if (!pixbuf || error) {
 485                 g_warning("Conus: update_end - error loading pixbuf: %s", conus->path);
 486                 aweather_bin_set_child(GTK_BIN(conus->config), gtk_label_new("Error loading pixbuf"));
 487                 g_remove(conus->path);
 488                 goto out;
 489         }
 490
 491         /* Split pixels into east/west parts */
 492         guchar *pixels = gdk_pixbuf_get_pixels(pixbuf);
 493         gint    width  = gdk_pixbuf_get_width(pixbuf);
 494         gint    height = gdk_pixbuf_get_height(pixbuf);
 495         gint    pxsize = gdk_pixbuf_get_has_alpha(pixbuf) ? 4 : 3;
 496         guchar *pixels_west = g_malloc(4*(width/2)*height);
 497         guchar *pixels_east = g_malloc(4*(width/2)*height);
 498         _conus_update_end_split(pixels, pixels_west, pixels_east,
 499                         width, height, pxsize);
 500         g_object_unref(pixbuf);
 501
 502         /* Copy pixels to graphics memory */
 503         _conus_update_end_copy(conus->tile[0], pixels_west);
 504         _conus_update_end_copy(conus->tile[1], pixels_east);
 505         g_free(pixels_west);
 506         g_free(pixels_east);
 507
 508         /* Update GUI */
 509         gchar *label = g_path_get_basename(conus->path);
 510         aweather_bin_set_child(GTK_BIN(conus->config), gtk_label_new(label));
 511         grits_viewer_queue_draw(conus->viewer);
 512         g_free(label);
 513
 514 out:
 515         conus->idle_source = 0;
 516         g_free(conus->path);
 517         g_mutex_unlock(&conus->loading);
 518         return FALSE;
 519 }
 520
 521 gpointer _conus_update_thread(gpointer _conus)
 522 {
 523         RadarConus *conus = _conus;
 524         conus->message = NULL;
 525
 526         /* Find nearest */
 527         g_debug("Conus: update_thread - nearest");
 528         gboolean offline = grits_viewer_get_offline(conus->viewer);
 529         gchar *conus_url = "http://radar.weather.gov/Conus/RadarImg/";
 530         gchar *nearest;
 531         if (time(NULL) - conus->time < 60*60*5 && !offline) {
 532                 /* radar.weather.gov is full of lies.
 533                  * the index pages get cached and out of date */
 534                 /* gmtime is not thread safe, but it's not used very often so
 535                  * hopefully it'll be alright for now... :-( */
 536                 struct tm *tm = gmtime(&conus->time);
 537                 time_t onthe8 = conus->time - 60*((tm->tm_min+1)%10+1);
 538                 tm = gmtime(&onthe8);
 539                 nearest = g_strdup_printf("Conus_%04d%02d%02d_%02d%02d_N0Ronly.gif",
 540                                 tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday,
 541                                 tm->tm_hour, tm->tm_min);
 542         } else {
 543                 GList *files = grits_http_available(conus->http,
 544                                 "^Conus_[^\"]*_N0Ronly.gif$", "", NULL, NULL);
 545                 nearest = _find_nearest(conus->time, files, 6);
 546                 g_list_foreach(files, (GFunc)g_free, NULL);
 547                 g_list_free(files);
 548                 if (!nearest) {
 549                         conus->message = "No suitable files";
 550                         goto out;
 551                 }
 552         }
 553
 554         /* Fetch the image */
 555         g_debug("Conus: update_thread - fetch");
 556         gchar *uri  = g_strconcat(conus_url, nearest, NULL);
 557         conus->path = grits_http_fetch(conus->http, uri, nearest,
 558                         offline ? GRITS_LOCAL : GRITS_ONCE,
 559                         _conus_update_loading, conus);
 560         g_free(nearest);
 561         g_free(uri);
 562         if (!conus->path) {
 563                 conus->message = "Fetch failed";
 564                 goto out;
 565         }
 566
 567 out:
 568         g_debug("Conus: update_thread - done");
 569         if (!conus->idle_source)
 570                 conus->idle_source = g_idle_add(_conus_update_end, conus);
 571         return NULL;
 572 }
 573
 574 void _conus_update(RadarConus *conus)
 575 {
 576         if (!g_mutex_trylock(&conus->loading))
 577                 return;
 578         conus->time = grits_viewer_get_time(conus->viewer);
 579         g_debug("Conus: update - %d",
 580                         (gint)conus->time);
 581
 582         /* Add a progress bar */
 583         GtkWidget *progress = gtk_progress_bar_new();
 584         gtk_progress_bar_set_text(GTK_PROGRESS_BAR(progress), "Loading...");
 585         aweather_bin_set_child(GTK_BIN(conus->config), progress);
 586
 587         g_thread_new("conus-update-thread", _conus_update_thread, conus);
 588 }
 589
 590 RadarConus *radar_conus_new(GtkWidget *pconfig,
 591                 GritsViewer *viewer, GritsHttp *http)
 592 {
 593         RadarConus *conus = g_new0(RadarConus, 1);
 594         conus->viewer  = g_object_ref(viewer);
 595         conus->http    = http;
 596         conus->config  = gtk_alignment_new(0, 0, 1, 1);
 597         g_mutex_init(&conus->loading);
 598
 599         gdouble south =  CONUS_NORTH - CONUS_DEG_PER_PX*CONUS_HEIGHT;
 600         gdouble east  =  CONUS_WEST  + CONUS_DEG_PER_PX*CONUS_WIDTH;
 601         gdouble mid   =  CONUS_WEST  + CONUS_DEG_PER_PX*CONUS_WIDTH/2;
 602         conus->tile[0] = grits_tile_new(NULL, CONUS_NORTH, south, mid, CONUS_WEST);
 603         conus->tile[1] = grits_tile_new(NULL, CONUS_NORTH, south, east, mid);
 604         conus->tile[0]->zindex = 2;
 605         conus->tile[1]->zindex = 1;
 606         grits_viewer_add(viewer, GRITS_OBJECT(conus->tile[0]), GRITS_LEVEL_WORLD+2, FALSE);
 607         grits_viewer_add(viewer, GRITS_OBJECT(conus->tile[1]), GRITS_LEVEL_WORLD+2, FALSE);
 608
 609         conus->time_id = g_signal_connect_swapped(viewer, "time-changed",
 610                         G_CALLBACK(_conus_update), conus);
 611         conus->refresh_id = g_signal_connect_swapped(viewer, "refresh",
 612                         G_CALLBACK(_conus_update), conus);
 613
 614         g_object_set_data(G_OBJECT(conus->config), "conus", conus);
 615         gtk_notebook_append_page(GTK_NOTEBOOK(pconfig), conus->config,
 616                         gtk_label_new("Conus"));
 617
 618         _conus_update(conus);
 619         return conus;
 620 }
 621
 622 void radar_conus_free(RadarConus *conus)
 623 {
 624         g_signal_handler_disconnect(conus->viewer, conus->time_id);
 625         g_signal_handler_disconnect(conus->viewer, conus->refresh_id);
 626         if (conus->idle_source)
 627                 g_source_remove(conus->idle_source);
 628
 629         for (int i = 0; i < 2; i++) {
 630                 GritsTile *tile = conus->tile[i];
 631                 grits_viewer_remove(conus->viewer, GRITS_OBJECT(tile));
 632                 g_object_unref(tile);
 633         }
 634
 635         g_object_unref(conus->viewer);
 636         g_free(conus);
 637 }
 638
 639
 640 /********************
 641  * GritsPluginRadar *
 642  ********************/
 643 static void _draw_hud(GritsCallback *callback, GritsOpenGL *opengl, gpointer _self)
 644 {
 645         g_debug("GritsPluginRadar: _draw_hud");
 646         /* Setup OpenGL */
 647         glMatrixMode(GL_MODELVIEW ); glLoadIdentity();
 648         glMatrixMode(GL_PROJECTION); glLoadIdentity();
 649         glDisable(GL_TEXTURE_2D);
 650         glDisable(GL_ALPHA_TEST);
 651         glDisable(GL_CULL_FACE);
 652         glDisable(GL_LIGHTING);
 653         glEnable(GL_COLOR_MATERIAL);
 654
 655         GHashTableIter iter;
 656         gpointer name, _site;
 657         GritsPluginRadar *self = GRITS_PLUGIN_RADAR(_self);
 658         g_hash_table_iter_init(&iter, self->sites);
 659         while (g_hash_table_iter_next(&iter, &name, &_site)) {
 660                 /* Pick correct colormaps */
 661                 RadarSite *site = _site;
 662                 if (site->hidden || !site->level2)
 663                         continue;
 664                 AWeatherColormap *colormap = site->level2->sweep_colors;
 665
 666                 /* Print the color table */
 667                 glBegin(GL_QUADS);
 668                 int len = colormap->len;
 669                 for (int i = 0; i < len; i++) {
 670                         glColor4ubv(colormap->data[i]);
 671                         glVertex3f(-1.0, (float)((i  ) - len/2)/(len/2), 0.0); // bot left
 672                         glVertex3f(-1.0, (float)((i+1) - len/2)/(len/2), 0.0); // top left
 673                         glVertex3f(-0.9, (float)((i+1) - len/2)/(len/2), 0.0); // top right
 674                         glVertex3f(-0.9, (float)((i  ) - len/2)/(len/2), 0.0); // bot right
 675                 }
 676                 glEnd();
 677         }
 678 }
 679
 680 static void _load_colormap(gchar *filename, AWeatherColormap *cm)
 681 {
 682         g_debug("GritsPluginRadar: _load_colormap - %s", filename);
 683         FILE *file = fopen(filename, "r");
 684         if (!file)
 685                 g_error("GritsPluginRadar: open failed");
 686         guint8 color[4];
 687         GArray *array = g_array_sized_new(FALSE, TRUE, sizeof(color), 256);
 688         if (!fgets(cm->name, sizeof(cm->name), file)) goto out;
 689         if (!fscanf(file, "%f\n", &cm->scale))        goto out;
 690         if (!fscanf(file, "%f\n", &cm->shift))        goto out;
 691         int r, g, b, a;
 692         while (fscanf(file, "%d %d %d %d\n", &r, &g, &b, &a) == 4) {
 693                 color[0] = r;
 694                 color[1] = g;
 695                 color[2] = b;
 696                 color[3] = a;
 697                 g_array_append_val(array, color);
 698         }
 699         cm->len  = (gint )array->len;
 700         cm->data = (void*)array->data;
 701 out:
 702         g_array_free(array, FALSE);
 703         fclose(file);
 704 }
 705
 706 static void _update_hidden(GtkNotebook *notebook,
 707                 gpointer _, guint page_num, gpointer viewer)
 708 {
 709         g_debug("GritsPluginRadar: _update_hidden - 0..%d = %d",
 710                         gtk_notebook_get_n_pages(notebook), page_num);
 711
 712         for (gint i = 0; i < gtk_notebook_get_n_pages(notebook); i++) {
 713                 gboolean is_hidden = (i != page_num);
 714                 GtkWidget  *config = gtk_notebook_get_nth_page(notebook, i);
 715                 RadarConus *conus  = g_object_get_data(G_OBJECT(config), "conus");
 716                 RadarSite  *site   = g_object_get_data(G_OBJECT(config), "site");
 717
 718                 /* Conus */
 719                 if (conus) {
 720                         grits_object_hide(GRITS_OBJECT(conus->tile[0]), is_hidden);
 721                         grits_object_hide(GRITS_OBJECT(conus->tile[1]), is_hidden);
 722                 } else if (site) {
 723                         site->hidden = is_hidden;
 724                         if (site->level2)
 725                                 grits_object_hide(GRITS_OBJECT(site->level2), is_hidden);
 726                 } else {
 727                         g_warning("GritsPluginRadar: _update_hidden - no site or counus found");
 728                 }
 729         }
 730         grits_viewer_queue_draw(viewer);
 731 }
 732
 733 /* Methods */
 734 GritsPluginRadar *grits_plugin_radar_new(GritsViewer *viewer, GritsPrefs *prefs)
 735 {
 736         /* TODO: move to constructor if possible */
 737         g_debug("GritsPluginRadar: new");
 738         GritsPluginRadar *self = g_object_new(GRITS_TYPE_PLUGIN_RADAR, NULL);
 739         self->viewer = g_object_ref(viewer);
 740         self->prefs  = g_object_ref(prefs);
 741
 742         /* Setup page switching */
 743         self->tab_id = g_signal_connect(self->config, "switch-page",
 744                         G_CALLBACK(_update_hidden), viewer);
 745
 746         /* Load HUD */
 747         self->hud = grits_callback_new(_draw_hud, self);
 748         grits_viewer_add(viewer, GRITS_OBJECT(self->hud), GRITS_LEVEL_HUD, FALSE);
 749
 750         /* Load Conus */
 751         self->conus = radar_conus_new(self->config, self->viewer, self->conus_http);
 752
 753         /* Load radar sites */
 754         for (city_t *city = cities; city->type; city++) {
 755                 if (city->type != LOCATION_CITY)
 756                         continue;
 757                 RadarSite *site = radar_site_new(city, self->config,
 758                                 self->viewer, self->prefs, self->sites_http);
 759                 g_hash_table_insert(self->sites, city->code, site);
 760         }
 761
 762         return self;
 763 }
 764
 765 static GtkWidget *grits_plugin_radar_get_config(GritsPlugin *_self)
 766 {
 767         GritsPluginRadar *self = GRITS_PLUGIN_RADAR(_self);
 768         return self->config;
 769 }
 770
 771 /* GObject code */
 772 static void grits_plugin_radar_plugin_init(GritsPluginInterface *iface);
 773 G_DEFINE_TYPE_WITH_CODE(GritsPluginRadar, grits_plugin_radar, G_TYPE_OBJECT,
 774                 G_IMPLEMENT_INTERFACE(GRITS_TYPE_PLUGIN,
 775                         grits_plugin_radar_plugin_init));
 776 static void grits_plugin_radar_plugin_init(GritsPluginInterface *iface)
 777 {
 778         g_debug("GritsPluginRadar: plugin_init");
 779         /* Add methods to the interface */
 780         iface->get_config = grits_plugin_radar_get_config;
 781 }
 782 static void grits_plugin_radar_init(GritsPluginRadar *self)
 783 {
 784         g_debug("GritsPluginRadar: class_init");
 785         /* Set defaults */
 786         self->sites_http = grits_http_new(G_DIR_SEPARATOR_S
 787                         "nexrad" G_DIR_SEPARATOR_S
 788                         "level2" G_DIR_SEPARATOR_S);
 789         self->conus_http = grits_http_new(G_DIR_SEPARATOR_S
 790                         "nexrad" G_DIR_SEPARATOR_S
 791                         "conus"  G_DIR_SEPARATOR_S);
 792         self->sites      = g_hash_table_new_full(g_str_hash, g_str_equal,
 793                                 NULL, (GDestroyNotify)radar_site_free);
 794         self->config     = g_object_ref(gtk_notebook_new());
 795
 796         /* Load colormaps */
 797         for (int i = 0; colormaps[i].file; i++) {
 798                 gchar *file = g_build_filename(PKGDATADIR,
 799                                 "colors", colormaps[i].file, NULL);
 800                 _load_colormap(file, &colormaps[i]);
 801                 g_free(file);
 802         }
 803
 804         /* Need to position on the top because of Win32 bug */
 805         gtk_notebook_set_tab_pos(GTK_NOTEBOOK(self->config), GTK_POS_LEFT);
 806 }
 807 static void grits_plugin_radar_dispose(GObject *gobject)
 808 {
 809         g_debug("GritsPluginRadar: dispose");
 810         GritsPluginRadar *self = GRITS_PLUGIN_RADAR(gobject);
 811         if (self->viewer) {
 812                 GritsViewer *viewer = self->viewer;
 813                 self->viewer = NULL;
 814                 g_signal_handler_disconnect(self->config, self->tab_id);
 815                 grits_viewer_remove(viewer, GRITS_OBJECT(self->hud));
 816                 radar_conus_free(self->conus);
 817                 g_hash_table_destroy(self->sites);
 818                 g_object_unref(self->config);
 819                 g_object_unref(self->hud);
 820                 g_object_unref(self->prefs);
 821                 g_object_unref(viewer);
 822         }
 823         /* Drop references */
 824         G_OBJECT_CLASS(grits_plugin_radar_parent_class)->dispose(gobject);
 825 }
 826 static void grits_plugin_radar_finalize(GObject *gobject)
 827 {
 828         g_debug("GritsPluginRadar: finalize");
 829         GritsPluginRadar *self = GRITS_PLUGIN_RADAR(gobject);
 830         /* Free data */
 831         grits_http_free(self->conus_http);
 832         grits_http_free(self->sites_http);
 833         gtk_widget_destroy(self->config);
 834         G_OBJECT_CLASS(grits_plugin_radar_parent_class)->finalize(gobject);
 835
 836 }
 837 static void grits_plugin_radar_class_init(GritsPluginRadarClass *klass)
 838 {
 839         g_debug("GritsPluginRadar: class_init");
 840         GObjectClass *gobject_class = (GObjectClass*)klass;
 841         gobject_class->dispose  = grits_plugin_radar_dispose;
 842         gobject_class->finalize = grits_plugin_radar_finalize;
 843 }