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