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   1 /*
   2  * Copyright © 2010 Anthony Towns <aj@erisian.com.au>
   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; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 package org.altusmetrum.altosuilib_2;
  19
  20 import java.awt.*;
  21 import java.awt.event.*;
  22 import javax.swing.*;
  23 import java.io.*;
  24 import java.lang.Math;
  25 import java.awt.geom.*;
  26 import java.util.*;
  27 import java.util.concurrent.*;
  28 import org.altusmetrum.altoslib_4.*;
  29
  30 class MapPoint {
  31         double  lat, lon;
  32         int     state;
  33
  34         public MapPoint(double lat, double lon, int state) {
  35                 this.lat = lat;
  36                 this.lon = lon;
  37                 this.state = state;
  38         }
  39
  40         public boolean equals(MapPoint other) {
  41                 if (other == null)
  42                         return false;
  43                 if (other.lat != lat)
  44                         return false;
  45                 if (other.lon != lon)
  46                         return false;
  47                 if (other.state != state)
  48                         return false;
  49                 return true;
  50         }
  51 }
  52
  53 public class AltosSiteMap extends JComponent implements AltosFlightDisplay, MouseMotionListener, MouseListener, HierarchyBoundsListener {
  54         // preferred vertical step in a tile in naut. miles
  55         // will actually choose a step size between x and 2x, where this
  56         // is 1.5x
  57         static final double tile_size_nmi = 0.75;
  58
  59         static final int px_size = 512;
  60
  61         static final int MAX_TILE_DELTA = 100;
  62
  63         static final int maptype_hybrid = 0;
  64         static final int maptype_roadmap = 1;
  65         static final int maptype_satellite = 2;
  66         static final int maptype_terrain = 3;
  67
  68         int maptype = maptype_hybrid;
  69
  70         static final String[] maptype_names = {
  71                 "hybrid",
  72                 "roadmap",
  73                 "satellite",
  74                 "terrain"
  75         };
  76
  77         public static final String[] maptype_labels = {
  78                 "Hybrid",
  79                 "Roadmap",
  80                 "Satellite",
  81                 "Terrain"
  82         };
  83
  84         LinkedList<MapPoint> points = new LinkedList<MapPoint>();
  85
  86         private static Point2D.Double translatePoint(Point2D.Double p,
  87                         Point2D.Double d)
  88         {
  89                 return new Point2D.Double(p.x + d.x, p.y + d.y);
  90         }
  91
  92         static class LatLng {
  93                 public double lat, lng;
  94                 public LatLng(double lat, double lng) {
  95                         this.lat = lat;
  96                         this.lng = lng;
  97                 }
  98         }
  99
 100         // based on google js
 101         //  http://maps.gstatic.com/intl/en_us/mapfiles/api-3/2/10/main.js
 102         // search for fromLatLngToPoint and fromPointToLatLng
 103         /*
 104         private static Point2D.Double pt(LatLng latlng, int zoom) {
 105                 double scale_x = 256/360.0 * Math.pow(2, zoom);
 106                 double scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom);
 107                 return pt(latlng, scale_x, scale_y);
 108         }
 109         */
 110
 111         private static Point2D.Double pt(LatLng latlng,
 112                                          double scale_x, double scale_y)
 113         {
 114                 Point2D.Double res = new Point2D.Double();
 115                 double e;
 116
 117                 res.x = latlng.lng * scale_x;
 118
 119                 e = Math.sin(Math.toRadians(latlng.lat));
 120                 e = Math.max(e,-(1-1.0E-15));
 121                 e = Math.min(e,  1-1.0E-15 );
 122
 123                 res.y = 0.5*Math.log((1+e)/(1-e))*-scale_y;
 124                 return res;
 125         }
 126
 127         static private LatLng latlng(Point2D.Double pt,
 128                                      double scale_x, double scale_y)
 129         {
 130                 double lat, lng;
 131                 double rads;
 132
 133                 lng = pt.x/scale_x;
 134                 rads = 2 * Math.atan(Math.exp(-pt.y/scale_y));
 135                 lat = Math.toDegrees(rads - Math.PI/2);
 136
 137                 return new LatLng(lat,lng);
 138         }
 139
 140         static final int default_zoom = 15;
 141         static final int min_zoom = 3;
 142         static final int max_zoom = 21;
 143
 144         int zoom = default_zoom;
 145
 146         double scale_x, scale_y;
 147
 148         int radius;     /* half width/height of tiles to load */
 149
 150         private Point2D.Double pt(double lat, double lng) {
 151                 return pt(new LatLng(lat, lng), scale_x, scale_y);
 152         }
 153
 154         private LatLng latlng(double x, double y) {
 155                 return latlng(new Point2D.Double(x,y), scale_x, scale_y);
 156         }
 157         /*
 158         private LatLng latlng(Point2D.Double pt) {
 159                 return latlng(pt, scale_x, scale_y);
 160         }
 161         */
 162
 163         private LatLng latlng(Point pt) {
 164                 return latlng(new Point2D.Double(pt.x, pt.y), scale_x, scale_y);
 165         }
 166
 167         ConcurrentHashMap<Point,AltosSiteMapTile> mapTiles = new ConcurrentHashMap<Point,AltosSiteMapTile>();
 168         Point2D.Double centre;
 169
 170         private Point2D.Double tileCoordOffset(Point p) {
 171                 return new Point2D.Double(centre.x - p.x*px_size,
 172                                           centre.y - p.y*px_size);
 173         }
 174
 175         private Point tileOffset(Point2D.Double p) {
 176                 return new Point((int)Math.floor((centre.x+p.x)/px_size),
 177                                  (int)Math.floor((centre.y+p.y)/px_size));
 178         }
 179
 180         private Point2D.Double getBaseLocation(double lat, double lng) {
 181                 Point2D.Double locn = pt(0,0), north_step;
 182
 183                 scale_x = 256/360.0 * Math.pow(2, zoom);
 184                 scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom);
 185                 locn = pt(lat, lng);
 186                 locn.x = -px_size * Math.floor(locn.x/px_size);
 187                 locn.y = -px_size * Math.floor(locn.y/px_size);
 188                 return locn;
 189         }
 190
 191         public void reset() {
 192                 // nothing
 193         }
 194
 195         public void set_font() {
 196                 for (AltosSiteMapTile tile : mapTiles.values())
 197                         tile.set_font(AltosUILib.value_font);
 198         }
 199
 200         static final int load_mode_cached = 1;
 201         static final int load_mode_uncached = 2;
 202
 203         private boolean load_map(final AltosSiteMapTile tile,
 204                                  final File pngfile, String pngurl,
 205                                  int load_mode)
 206         {
 207                 boolean has_map = AltosSiteMapCache.has_map(pngfile, pngurl);
 208                 if ((load_mode & load_mode_uncached) == 0 && !has_map)
 209                         return false;
 210                 if ((load_mode & load_mode_cached) == 0 && has_map)
 211                         return false;
 212
 213                 tile.set_status(AltosSiteMapCache.loading);
 214                 int status = AltosSiteMapCache.fetch_map(pngfile, pngurl);
 215                 if (status == AltosSiteMapCache.success) {
 216                         if (SwingUtilities.isEventDispatchThread())
 217                                 tile.load_map(pngfile);
 218                         else {
 219                                 SwingUtilities.invokeLater(new Runnable() {
 220                                                 public void run() {
 221                                                         tile.load_map(pngfile);
 222                                                 }
 223                                         });
 224                         }
 225                 } else {
 226                         tile.set_status(status);
 227                         System.out.printf("# Failed to fetch file %s (status %d)\n", pngfile, status);
 228                         System.out.printf(" wget -O '%s' '%s'\n", pngfile, pngurl);
 229                         System.out.printf(" sleep 1\n");
 230                 }
 231                 return true;
 232         }
 233
 234
 235         class AltosSiteMapPrefetch {
 236                 int     x;
 237                 int     y;
 238                 int     result;
 239                 File    pngfile;
 240                 String  pngurl;
 241         }
 242
 243         private AltosSiteMapPrefetch prefetchMap(int x, int y) {
 244                 AltosSiteMapPrefetch    prefetch = new AltosSiteMapPrefetch();
 245                 LatLng map_latlng = latlng(
 246                         -centre.x + x*px_size + px_size/2,
 247                         -centre.y + y*px_size + px_size/2);
 248                 prefetch.pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom, maptype_hybrid);
 249                 prefetch.pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom, maptype_hybrid);
 250                 if (AltosSiteMapCache.has_map(prefetch.pngfile, prefetch.pngurl)) {
 251                         prefetch.result = 1;
 252                 } else if (AltosSiteMapCache.fetch_map(prefetch.pngfile, prefetch.pngurl) == AltosSiteMapCache.success) {
 253                         prefetch.result = 0;
 254                 } else {
 255                         prefetch.result = -1;
 256                 }
 257                 return prefetch;
 258         }
 259
 260         public static void prefetchMaps(double lat, double lng, int radius, int maptypes, int min_zoom, int max_zoom) {
 261                 AltosSiteMap asm = new AltosSiteMap(true);
 262
 263                 for (int z = min_zoom; z <= max_zoom; z++) {
 264                         asm.zoom = z;
 265                         asm.set_radius(radius);
 266                         asm.centre = asm.getBaseLocation(lat, lng);
 267                         for (int t = maptype_hybrid; t <= maptype_terrain; t++) {
 268                                 if ((maptypes & (1 << t)) !=0) {
 269                                         asm.maptype = t;
 270                                         for (int y = -radius; y <= radius; y++) {
 271                                                 for (int x = -radius; x <= radius; x++) {
 272                                                         AltosSiteMapPrefetch prefetch = asm.prefetchMap(x, y);
 273                                                         switch (prefetch.result) {
 274                                                         case 1:
 275                                                                 System.out.printf("Already have %s\n", prefetch.pngfile);
 276                                                                 break;
 277                                                         case 0:
 278                                                                 System.out.printf("Fetched map %s\n", prefetch.pngfile);
 279                                                                 break;
 280                                                         case -1:
 281                                                                 System.out.printf("# Failed to fetch file %s\n", prefetch.pngfile);
 282                                                                 System.out.printf(" wget -O '%s' ''\n",
 283                                                                                   prefetch.pngfile, prefetch.pngurl);
 284                                                                 break;
 285                                                         }
 286                                                 }
 287                                         }
 288                                 }
 289                         }
 290                 }
 291         }
 292
 293         public static void prefetchMaps(double lat, double lon) {
 294                 prefetchMaps(lat, lon, 2, 1 << maptype_hybrid, 0, 0);
 295         }
 296
 297         public File init_map(Point offset, int load_mode) {
 298                 AltosSiteMapTile tile = mapTiles.get(offset);
 299                 Point2D.Double coord = tileCoordOffset(offset);
 300
 301                 LatLng map_latlng = latlng(px_size/2-coord.x, px_size/2-coord.y);
 302
 303                 File pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom, maptype);
 304                 String pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom, maptype);
 305                 load_map(tile, pngfile, pngurl, load_mode);
 306                 return pngfile;
 307         }
 308
 309         private void initAndFinishMapAsync (final AltosSiteMapTile tile, final Point offset) {
 310                 Thread thread = new Thread() {
 311                                 public void run() {
 312                                         init_map(offset, load_mode_cached|load_mode_uncached);
 313                                         SwingUtilities.invokeLater( new Runnable() {
 314                                                         public void run() {
 315                                                                 addTileAt(tile, offset);
 316                                                         }
 317                                                 } );
 318                                 }
 319                         };
 320                 thread.start();
 321         }
 322
 323         double  lat, lon;
 324         boolean base_location_set = false;
 325
 326         public void clear_base_location() {
 327                 base_location_set = false;
 328                 circle_set = false;
 329                 points = new LinkedList<MapPoint>();
 330                 line_start = line_end = null;
 331                 for (AltosSiteMapTile tile : mapTiles.values()) {
 332                         tile.clearMap();
 333                         tile.set_status(AltosSiteMapCache.loading);
 334                 }
 335         }
 336
 337         public void setBaseLocation(double lat, double lng) {
 338                 this.lat = lat;
 339                 this.lon = lng;
 340                 base_location_set = true;
 341
 342                 centre = getBaseLocation(lat, lng);
 343                 scrollRocketToVisible(pt(lat,lng));
 344         }
 345
 346         private void initMaps(double lat, double lng) {
 347                 setBaseLocation(lat, lng);
 348
 349                 for (AltosSiteMapTile tile : mapTiles.values()) {
 350                         tile.clearMap();
 351                         tile.set_status(AltosSiteMapCache.loading);
 352                 }
 353                 Thread thread = new Thread() {
 354                                 public void run() {
 355                                         for (Point k : mapTiles.keySet())
 356                                                 init_map(k, load_mode_cached);
 357                                         for (Point k : mapTiles.keySet())
 358                                                 init_map(k, load_mode_uncached);
 359                                 }
 360                         };
 361                 thread.start();
 362         }
 363
 364         private static File MapFile(double lat, double lng, int zoom, int maptype) {
 365                 char chlat = lat < 0 ? 'S' : 'N';
 366                 char chlng = lng < 0 ? 'W' : 'E';
 367                 if (lat < 0) lat = -lat;
 368                 if (lng < 0) lng = -lng;
 369                 String maptype_string = String.format("%s-", maptype_names[maptype]);
 370                 String format_string;
 371                 if (maptype == maptype_hybrid || maptype == maptype_satellite || maptype == maptype_terrain)
 372                         format_string = "jpg";
 373                 else
 374                         format_string = "png";
 375                 return new File(AltosUIPreferences.mapdir(),
 376                                 String.format("map-%c%.6f,%c%.6f-%s%d.%s",
 377                                               chlat, lat, chlng, lng, maptype_string, zoom, format_string));
 378         }
 379
 380         private static String MapURL(double lat, double lng, int zoom, int maptype) {
 381                 String format_string;
 382                 if (maptype == maptype_hybrid || maptype == maptype_satellite || maptype == maptype_terrain)
 383                         format_string = "jpg";
 384                 else
 385                         format_string = "png32";
 386
 387                 if (AltosUIVersion.has_google_maps_api_key())
 388                         return String.format("http://maps.google.com/maps/api/staticmap?center=%.6f,%.6f&zoom=%d&size=%dx%d&sensor=false&maptype=%s&format=%s&key=%s",
 389                                              lat, lng, zoom, px_size, px_size, maptype_names[maptype], format_string, AltosUIVersion.google_maps_api_key);
 390                 else
 391                         return String.format("http://maps.google.com/maps/api/staticmap?center=%.6f,%.6f&zoom=%d&size=%dx%d&sensor=false&maptype=%s&format=%s",
 392                                              lat, lng, zoom, px_size, px_size, maptype_names[maptype], format_string);
 393         }
 394
 395         boolean initialised = false;
 396         MapPoint last_point = null;
 397         int last_state = -1;
 398
 399         private void show(double lat, double lon) {
 400                 System.out.printf ("show %g %g\n", lat, lon);
 401                 return;
 402 //              initMaps(lat, lon);
 403 //              scrollRocketToVisible(pt(lat, lon));
 404         }
 405
 406         JLabel  zoom_label;
 407
 408         private void set_zoom_label() {
 409                 zoom_label.setText(String.format("Zoom %d", zoom - default_zoom));
 410         }
 411
 412         public void set_zoom(int zoom) {
 413                 if (min_zoom <= zoom && zoom <= max_zoom) {
 414                         this.zoom = zoom;
 415                         if (base_location_set) {
 416                                 set_tiles();
 417                                 initMaps(lat, lon);
 418                         }
 419                         redraw();
 420                         set_zoom_label();
 421                 }
 422         }
 423
 424         public int get_zoom() {
 425                 return zoom;
 426         }
 427
 428         public void set_maptype(int type) {
 429                 maptype = type;
 430                 maptype_combo.setSelectedIndex(type);
 431                 if (base_location_set)
 432                         initMaps(lat, lon);
 433                 redraw();
 434         }
 435
 436         private void draw(MapPoint last_point, MapPoint point) {
 437                 boolean force_ensure = false;
 438                 if (last_point == null) {
 439                         force_ensure = true;
 440                         last_point = point;
 441                 }
 442
 443                 Point2D.Double pt = pt(point.lat, point.lon);
 444                 Point2D.Double last_pt = pt(last_point.lat, last_point.lon);
 445
 446                 boolean in_any = false;
 447                 for (Point offset : mapTiles.keySet()) {
 448                         AltosSiteMapTile tile = mapTiles.get(offset);
 449                         Point2D.Double ref, lref;
 450                         ref = translatePoint(pt, tileCoordOffset(offset));
 451                         lref = translatePoint(last_pt, tileCoordOffset(offset));
 452                         tile.show(point.state, lref, ref);
 453                         if (0 <= ref.x && ref.x < px_size)
 454                                 if (0 <= ref.y && ref.y < px_size)
 455                                         in_any = true;
 456                 }
 457
 458                 Point offset = tileOffset(pt);
 459                 if (!in_any) {
 460                         Point2D.Double ref, lref;
 461                         ref = translatePoint(pt, tileCoordOffset(offset));
 462                         lref = translatePoint(last_pt, tileCoordOffset(offset));
 463
 464                         AltosSiteMapTile tile = createTile(offset);
 465                         tile.show(point.state, lref, ref);
 466                         initAndFinishMapAsync(tile, offset);
 467                 }
 468
 469                 scrollRocketToVisible(pt);
 470
 471                 if (force_ensure || offset != tileOffset(last_pt)) {
 472                         ensureTilesAround(offset);
 473                 }
 474         }
 475
 476         private void redraw() {
 477                 MapPoint        last_point = null;
 478
 479                 for (MapPoint point : points) {
 480                         draw(last_point, point);
 481                         last_point = point;
 482                 }
 483                 if (circle_set)
 484                         draw_circle(circle_lat, circle_lon);
 485                 if (line_start != null)
 486                         set_line();
 487         }
 488
 489         public void show(final AltosState state, final AltosListenerState listener_state) {
 490                 // if insufficient gps data, nothing to update
 491                 AltosGPS        gps = state.gps;
 492
 493                 if (gps == null)
 494                         return;
 495
 496                 if (!gps.locked && gps.nsat < 4)
 497                         return;
 498
 499                 if (!initialised) {
 500                         if (state.pad_lat != AltosLib.MISSING && state.pad_lon != AltosLib.MISSING) {
 501                                 initMaps(state.pad_lat, state.pad_lon);
 502                                 initialised = true;
 503                         } else if (gps.lat != AltosLib.MISSING && gps.lon != AltosLib.MISSING) {
 504                                 initMaps(gps.lat, gps.lon);
 505                                 initialised = true;
 506                         } else {
 507                                 return;
 508                         }
 509                 }
 510
 511                 MapPoint        point = new MapPoint(gps.lat, gps.lon, state.state);
 512
 513                 if (point.equals(last_point))
 514                         return;
 515
 516                 points.add(point);
 517
 518                 draw(last_point, point);
 519
 520                 last_point = point;
 521         }
 522
 523         public void centre(Point2D.Double pt) {
 524                 Rectangle r = comp.getVisibleRect();
 525                 Point2D.Double copt = translatePoint(pt, tileCoordOffset(topleft));
 526                 int dx = (int)copt.x - r.width/2 - r.x;
 527                 int dy = (int)copt.y - r.height/2 - r.y;
 528                 r.x += dx;
 529                 r.y += dy;
 530                 r.width = 1;
 531                 r.height = 1;
 532                 comp.scrollRectToVisible(r);
 533         }
 534
 535         public void centre(AltosState state) {
 536                 if (!state.gps.locked && state.gps.nsat < 4)
 537                         return;
 538                 centre(pt(state.gps.lat, state.gps.lon));
 539         }
 540
 541         private double circle_lat, circle_lon;
 542         private boolean circle_set = false;
 543
 544         public void draw_circle(double lat, double lon) {
 545                 circle_lat = lat;
 546                 circle_lon = lon;
 547                 circle_set = true;
 548
 549                 Point2D.Double pt = pt(lat, lon);
 550
 551                 for (Point offset : mapTiles.keySet()) {
 552                         AltosSiteMapTile tile = mapTiles.get(offset);
 553                         Point2D.Double ref = translatePoint(pt, tileCoordOffset(offset));
 554                         tile.set_boost(ref);
 555                 }
 556         }
 557
 558         private AltosSiteMapTile createTile(Point offset) {
 559                 AltosSiteMapTile tile = new AltosSiteMapTile(px_size);
 560                 tile.set_font(AltosUILib.value_font);
 561                 mapTiles.put(offset, tile);
 562                 return tile;
 563         }
 564
 565         private void ensureTilesAround(Point base_offset) {
 566                 for (int x = -radius; x <= radius; x++) {
 567                         for (int y = -radius; y <= radius; y++) {
 568                                 Point offset = new Point(base_offset.x + x, base_offset.y + y);
 569                                 if (mapTiles.containsKey(offset))
 570                                         continue;
 571                                 AltosSiteMapTile tile = createTile(offset);
 572                                 initAndFinishMapAsync(tile, offset);
 573                         }
 574                 }
 575         }
 576
 577         private void set_tiles() {
 578                 for (int x = -radius; x <= radius; x++) {
 579                         for (int y = -radius; y <= radius; y++) {
 580                                 Point offset = new Point(x, y);
 581                                 if (mapTiles.containsKey(offset))
 582                                         continue;
 583                                 AltosSiteMapTile t = createTile(offset);
 584                                 addTileAt(t, offset);
 585                         }
 586                 }
 587                 for (Point offset : mapTiles.keySet()) {
 588                         if (offset.x < -radius || offset.x > radius ||
 589                             offset.y < -radius || offset.y > radius)
 590                         {
 591                                 removeTileAt(offset);
 592                         }
 593                 }
 594         }
 595
 596         public void set_radius(int radius) {
 597                 if (radius != this.radius) {
 598                         this.radius = radius;
 599                         set_tiles();
 600                 }
 601         }
 602
 603         private Point topleft = new Point(0,0);
 604         private void scrollRocketToVisible(Point2D.Double pt) {
 605                 Rectangle r = comp.getVisibleRect();
 606                 Point2D.Double copt = translatePoint(pt, tileCoordOffset(topleft));
 607
 608                 int dx = (int)copt.x - r.width/2 - r.x;
 609                 int dy = (int)copt.y - r.height/2 - r.y;
 610                 if (Math.abs(dx) > r.width/4 || Math.abs(dy) > r.height/4) {
 611                         r.x += dx;
 612                         r.y += dy;
 613                         comp.scrollRectToVisible(r);
 614                 }
 615         }
 616
 617         private void addTileAt(AltosSiteMapTile tile, Point offset) {
 618                 if (Math.abs(offset.x) >= MAX_TILE_DELTA ||
 619                                 Math.abs(offset.y) >= MAX_TILE_DELTA)
 620                 {
 621                         System.out.printf("Rocket too far away from pad (tile %d,%d)\n",
 622                                           offset.x, offset.y);
 623                         return;
 624                 }
 625
 626                 if (offset.x < topleft.x)
 627                         topleft.x = offset.x;
 628                 if (offset.y < topleft.y)
 629                         topleft.y = offset.y;
 630
 631                 GridBagConstraints c = new GridBagConstraints();
 632                 c.anchor = GridBagConstraints.CENTER;
 633                 c.fill = GridBagConstraints.BOTH;
 634                 // put some space between the map tiles, debugging only
 635                 // c.insets = new Insets(5, 5, 5, 5);
 636
 637                 c.gridx = offset.x + MAX_TILE_DELTA;
 638                 c.gridy = offset.y + MAX_TILE_DELTA;
 639                 layout.setConstraints(tile, c);
 640
 641                 comp.add(tile);
 642         }
 643
 644         private AltosSiteMap(boolean knowWhatYouAreDoing) {
 645                 if (!knowWhatYouAreDoing) {
 646                         throw new RuntimeException("Arggh.");
 647                 }
 648         }
 649
 650         private void removeTileAt(Point offset) {
 651                 AltosSiteMapTile        tile = mapTiles.get(offset);
 652
 653                 mapTiles.remove(offset);
 654                 comp.remove(tile);
 655
 656                 topleft = new Point(MAX_TILE_DELTA, MAX_TILE_DELTA);
 657                 for (Point o : mapTiles.keySet()) {
 658                         if (o.x < topleft.x)
 659                                 topleft.x = o.x;
 660                         if (o.y < topleft.y)
 661                                 topleft.y = o.y;
 662                 }
 663         }
 664
 665         JComponent comp;
 666
 667         private GridBagLayout layout = new GridBagLayout();
 668
 669         LatLng  line_start, line_end;
 670
 671         private void set_line() {
 672                 if (line_start != null && line_end != null) {
 673                         Point2D.Double  start = pt(line_start.lat, line_start.lng);
 674                         Point2D.Double  end = pt(line_end.lat, line_end.lng);
 675                         AltosGreatCircle        g = new AltosGreatCircle(line_start.lat, line_start.lng,
 676                                                                          line_end.lat, line_end.lng);
 677
 678                         for (Point offset : mapTiles.keySet()) {
 679                                 AltosSiteMapTile tile = mapTiles.get(offset);
 680                                 Point2D.Double s, e;
 681                                 s = translatePoint(start, tileCoordOffset(offset));
 682                                 e = translatePoint(end, tileCoordOffset(offset));
 683                                 tile.set_line(new Line2D.Double(s.x, s.y, e.x, e.y), g.distance);
 684                         }
 685                 } else {
 686                         for (AltosSiteMapTile tile : mapTiles.values())
 687                                 tile.set_line(null, 0);
 688                 }
 689         }
 690
 691         static void debug_component(Component who, String where) {
 692 /*
 693                 Rectangle       r = who.getBounds();
 694                 int             x = r.x / px_size;
 695                 int             y = r.y / px_size;
 696
 697                 System.out.printf ("%3d, %3d: %s\n", x, y, where);
 698 */
 699         }
 700
 701         LatLng latlng(MouseEvent e) {
 702                 if (!base_location_set)
 703                         return null;
 704
 705                 Rectangle       zerozero = mapTiles.get(new Point(0, 0)).getBounds();
 706
 707                 return latlng(-centre.x + e.getPoint().x - zerozero.x, -centre.y + e.getPoint().y - zerozero.y);
 708         }
 709
 710         /* MouseMotionListener methods */
 711         public void mouseDragged(MouseEvent e) {
 712                 if (!GrabNDrag.grab_n_drag(e)) {
 713                         LatLng  loc = latlng(e);
 714                         line_end = loc;
 715                         set_line();
 716                 }
 717         }
 718
 719         public void mouseMoved(MouseEvent e) {
 720         }
 721
 722         /* MouseListener methods */
 723         public void mouseClicked(MouseEvent e) {
 724         }
 725
 726         public void mouseEntered(MouseEvent e) {
 727         }
 728
 729         public void mouseExited(MouseEvent e) {
 730         }
 731
 732         public void mousePressed(MouseEvent e) {
 733                 if (!GrabNDrag.grab_n_drag(e)) {
 734                         LatLng  loc = latlng(e);
 735                         line_start = loc;
 736                         line_end = null;
 737                         set_line();
 738                 }
 739         }
 740
 741         public void mouseReleased(MouseEvent e) {
 742         }
 743
 744         private void set_cache_size() {
 745                 Rectangle       r = comp.getVisibleRect();
 746
 747                 int     width_tiles = (r.width + 2*px_size) / px_size;
 748                 int     height_tiles = (r.height + 2*px_size) / px_size;
 749                 int     tiles = width_tiles * height_tiles;
 750                 AltosSiteMapCache.set_cache_size(tiles);
 751         }
 752
 753         /* HierarchyBoundsListener methods */
 754         public void ancestorMoved(HierarchyEvent e) {
 755                 set_cache_size();
 756         }
 757
 758         public void ancestorResized(HierarchyEvent e) {
 759                 set_cache_size();
 760         }
 761
 762         JScrollPane     pane = new JScrollPane();
 763
 764         JComboBox<String>       maptype_combo;
 765
 766         public AltosSiteMap(int in_radius) {
 767                 radius = in_radius;
 768
 769                 comp = new JComponent() { };
 770
 771                 comp.addMouseMotionListener(this);
 772                 comp.addMouseListener(this);
 773                 comp.addHierarchyBoundsListener(this);
 774
 775                 GrabNDrag scroller = new GrabNDrag(comp);
 776
 777                 comp.setLayout(layout);
 778
 779                 set_tiles();
 780
 781                 pane.setViewportView(comp);
 782                 pane.setPreferredSize(new Dimension(500,500));
 783                 pane.setVisible(true);
 784                 pane.setEnabled(true);
 785
 786                 GridBagLayout   my_layout = new GridBagLayout();
 787
 788                 setLayout(my_layout);
 789
 790                 GridBagConstraints c = new GridBagConstraints();
 791                 c.anchor = GridBagConstraints.CENTER;
 792                 c.fill = GridBagConstraints.BOTH;
 793                 c.gridx = 0;
 794                 c.gridy = 0;
 795                 c.gridwidth = 1;
 796                 c.gridheight = 10;
 797                 c.weightx = 1;
 798                 c.weighty = 1;
 799                 add(pane, c);
 800
 801                 int     y = 0;
 802
 803                 zoom_label = new JLabel("", JLabel.CENTER);
 804                 set_zoom_label();
 805
 806                 c = new GridBagConstraints();
 807                 c.anchor = GridBagConstraints.CENTER;
 808                 c.fill = GridBagConstraints.HORIZONTAL;
 809                 c.gridx = 1;
 810                 c.gridy = y++;
 811                 c.weightx = 0;
 812                 c.weighty = 0;
 813                 add(zoom_label, c);
 814
 815                 JButton zoom_reset = new JButton("0");
 816                 zoom_reset.addActionListener(new ActionListener() {
 817                                 public void actionPerformed(ActionEvent e) {
 818                                         set_zoom(default_zoom);
 819                                 }
 820                         });
 821
 822                 c = new GridBagConstraints();
 823                 c.anchor = GridBagConstraints.CENTER;
 824                 c.fill = GridBagConstraints.HORIZONTAL;
 825                 c.gridx = 1;
 826                 c.gridy = y++;
 827                 c.weightx = 0;
 828                 c.weighty = 0;
 829                 add(zoom_reset, c);
 830
 831                 JButton zoom_in = new JButton("+");
 832                 zoom_in.addActionListener(new ActionListener() {
 833                                 public void actionPerformed(ActionEvent e) {
 834                                         set_zoom(get_zoom() + 1);
 835                                 }
 836                         });
 837
 838                 c = new GridBagConstraints();
 839                 c.anchor = GridBagConstraints.CENTER;
 840                 c.fill = GridBagConstraints.HORIZONTAL;
 841                 c.gridx = 1;
 842                 c.gridy = y++;
 843                 c.weightx = 0;
 844                 c.weighty = 0;
 845                 add(zoom_in, c);
 846
 847                 JButton zoom_out = new JButton("-");
 848                 zoom_out.addActionListener(new ActionListener() {
 849                                 public void actionPerformed(ActionEvent e) {
 850                                         set_zoom(get_zoom() - 1);
 851                                 }
 852                         });
 853                 c = new GridBagConstraints();
 854                 c.anchor = GridBagConstraints.CENTER;
 855                 c.fill = GridBagConstraints.HORIZONTAL;
 856                 c.gridx = 1;
 857                 c.gridy = y++;
 858                 c.weightx = 0;
 859                 c.weighty = 0;
 860                 add(zoom_out, c);
 861
 862                 maptype_combo = new JComboBox<String>(maptype_labels);
 863
 864                 maptype_combo.setEditable(false);
 865                 maptype_combo.setMaximumRowCount(maptype_combo.getItemCount());
 866                 maptype_combo.addItemListener(new ItemListener() {
 867                                 public void itemStateChanged(ItemEvent e) {
 868                                         maptype = maptype_combo.getSelectedIndex();
 869                                         if (base_location_set)
 870                                                 initMaps(lat, lon);
 871                                         redraw();
 872                                 }
 873                         });
 874
 875                 c = new GridBagConstraints();
 876                 c.anchor = GridBagConstraints.CENTER;
 877                 c.fill = GridBagConstraints.HORIZONTAL;
 878                 c.gridx = 1;
 879                 c.gridy = y++;
 880                 c.weightx = 0;
 881                 c.weighty = 0;
 882                 add(maptype_combo, c);
 883         }
 884
 885         public AltosSiteMap() {
 886                 this(1);
 887         }
 888 }