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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 {
  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         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                         SwingUtilities.invokeLater(new Runnable() {
 217                                         public void run() {
 218                                                 tile.load_map(pngfile);
 219                                         }
 220                                 });
 221                 } else {
 222                         tile.set_status(status);
 223                         System.out.printf("# Failed to fetch file %s (status %d)\n", pngfile, status);
 224                         System.out.printf(" wget -O '%s' '%s'\n", pngfile, pngurl);
 225                         System.out.printf(" sleep 1\n");
 226                 }
 227                 return true;
 228         }
 229
 230
 231         class AltosSiteMapPrefetch {
 232                 int     x;
 233                 int     y;
 234                 int     result;
 235                 File    pngfile;
 236                 String  pngurl;
 237         }
 238
 239         public AltosSiteMapPrefetch prefetchMap(int x, int y) {
 240                 AltosSiteMapPrefetch    prefetch = new AltosSiteMapPrefetch();
 241                 LatLng map_latlng = latlng(
 242                         -centre.x + x*px_size + px_size/2,
 243                         -centre.y + y*px_size + px_size/2);
 244                 prefetch.pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom, maptype_hybrid);
 245                 prefetch.pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom, maptype_hybrid);
 246                 if (AltosSiteMapCache.has_map(prefetch.pngfile, prefetch.pngurl)) {
 247                         prefetch.result = 1;
 248                 } else if (AltosSiteMapCache.fetch_map(prefetch.pngfile, prefetch.pngurl) == AltosSiteMapCache.success) {
 249                         prefetch.result = 0;
 250                 } else {
 251                         prefetch.result = -1;
 252                 }
 253                 return prefetch;
 254         }
 255
 256         public static void prefetchMaps(double lat, double lng) {
 257                 int w = AltosSiteMapPreload.width;
 258                 int h = AltosSiteMapPreload.height;
 259                 AltosSiteMap asm = new AltosSiteMap(true);
 260                 asm.centre = asm.getBaseLocation(lat, lng);
 261
 262                 //Point2D.Double p = new Point2D.Double();
 263                 //Point2D.Double p2;
 264                 int dx = -w/2, dy = -h/2;
 265                 for (int y = dy; y < h+dy; y++) {
 266                         for (int x = dx; x < w+dx; x++) {
 267                                 AltosSiteMapPrefetch prefetch = asm.prefetchMap(x, y);
 268                                 switch (prefetch.result) {
 269                                 case 1:
 270                                         System.out.printf("Already have %s\n", prefetch.pngfile);
 271                                         break;
 272                                 case 0:
 273                                         System.out.printf("Fetched map %s\n", prefetch.pngfile);
 274                                         break;
 275                                 case -1:
 276                                         System.out.printf("# Failed to fetch file %s\n", prefetch.pngfile);
 277                                         System.out.printf(" wget -O '%s' ''\n",
 278                                                           prefetch.pngfile, prefetch.pngurl);
 279                                         break;
 280                                 }
 281                         }
 282                 }
 283         }
 284
 285         public File init_map(Point offset, int load_mode) {
 286                 AltosSiteMapTile tile = mapTiles.get(offset);
 287                 Point2D.Double coord = tileCoordOffset(offset);
 288
 289                 LatLng map_latlng = latlng(px_size/2-coord.x, px_size/2-coord.y);
 290
 291                 File pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom, maptype);
 292                 String pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom, maptype);
 293                 load_map(tile, pngfile, pngurl, load_mode);
 294                 return pngfile;
 295         }
 296
 297         public void initAndFinishMapAsync (final AltosSiteMapTile tile, final Point offset) {
 298                 Thread thread = new Thread() {
 299                                 public void run() {
 300                                         init_map(offset, load_mode_cached|load_mode_uncached);
 301                                         finishTileLater(tile, offset);
 302                                 }
 303                         };
 304                 thread.start();
 305         }
 306
 307         double  lat, lon;
 308         boolean base_location_set = false;
 309
 310         public void clear_base_location() {
 311                 base_location_set = false;
 312                 circle_set = false;
 313                 points = new LinkedList<MapPoint>();
 314                 line_start = line_end = null;
 315         }
 316
 317         public void setBaseLocation(double lat, double lng) {
 318                 for (AltosSiteMapTile tile : mapTiles.values())
 319                         tile.clearMap();
 320                 this.lat = lat;
 321                 this.lon = lng;
 322                 base_location_set = true;
 323
 324                 centre = getBaseLocation(lat, lng);
 325                 scrollRocketToVisible(pt(lat,lng));
 326         }
 327
 328         private void initMaps(double lat, double lng) {
 329                 setBaseLocation(lat, lng);
 330
 331                 Thread thread = new Thread() {
 332                                 public void run() {
 333                                         for (Point k : mapTiles.keySet())
 334                                                 init_map(k, load_mode_cached);
 335                                         for (Point k : mapTiles.keySet())
 336                                                 init_map(k, load_mode_uncached);
 337                                 }
 338                         };
 339                 thread.start();
 340         }
 341
 342         private static File MapFile(double lat, double lng, int zoom, int maptype) {
 343                 char chlat = lat < 0 ? 'S' : 'N';
 344                 char chlng = lng < 0 ? 'W' : 'E';
 345                 if (lat < 0) lat = -lat;
 346                 if (lng < 0) lng = -lng;
 347                 String maptype_string = String.format("%s-", maptype_names[maptype]);
 348                 String format_string;
 349                 if (maptype == maptype_hybrid || maptype == maptype_satellite || maptype == maptype_terrain)
 350                         format_string = "jpg";
 351                 else
 352                         format_string = "png";
 353                 return new File(AltosUIPreferences.mapdir(),
 354                                 String.format("map-%c%.6f,%c%.6f-%s%d.%s",
 355                                               chlat, lat, chlng, lng, maptype_string, zoom, format_string));
 356         }
 357
 358         private static String MapURL(double lat, double lng, int zoom, int maptype) {
 359                 String format_string;
 360                 if (maptype == maptype_hybrid || maptype == maptype_satellite || maptype == maptype_terrain)
 361                         format_string = "jpg";
 362                 else
 363                         format_string = "png32";
 364                 return String.format("http://maps.google.com/maps/api/staticmap?center=%.6f,%.6f&zoom=%d&size=%dx%d&sensor=false&maptype=%s&format=%s",
 365                                      lat, lng, zoom, px_size, px_size, maptype_names[maptype], format_string);
 366         }
 367
 368         boolean initialised = false;
 369         MapPoint last_point = null;
 370         int last_state = -1;
 371
 372         public void show(double lat, double lon) {
 373                 System.out.printf ("show %g %g\n", lat, lon);
 374                 return;
 375 //              initMaps(lat, lon);
 376 //              scrollRocketToVisible(pt(lat, lon));
 377         }
 378
 379         JLabel  zoom_label;
 380
 381         public void set_zoom_label() {
 382                 zoom_label.setText(String.format("- %d -", zoom - default_zoom));
 383         }
 384
 385         public void set_zoom(int zoom) {
 386                 if (min_zoom <= zoom && zoom <= max_zoom) {
 387                         this.zoom = zoom;
 388                         if (base_location_set)
 389                                 initMaps(lat, lon);
 390                         redraw();
 391                         set_zoom_label();
 392                 }
 393         }
 394
 395         public int get_zoom() {
 396                 return zoom;
 397         }
 398
 399         public void draw(MapPoint last_point, MapPoint point) {
 400                 boolean force_ensure = false;
 401                 if (last_point == null) {
 402                         force_ensure = true;
 403                         last_point = point;
 404                 }
 405
 406                 Point2D.Double pt = pt(point.lat, point.lon);
 407                 Point2D.Double last_pt = pt(last_point.lat, last_point.lon);
 408
 409                 boolean in_any = false;
 410                 for (Point offset : mapTiles.keySet()) {
 411                         AltosSiteMapTile tile = mapTiles.get(offset);
 412                         Point2D.Double ref, lref;
 413                         ref = translatePoint(pt, tileCoordOffset(offset));
 414                         lref = translatePoint(last_pt, tileCoordOffset(offset));
 415                         tile.show(point.state, lref, ref);
 416                         if (0 <= ref.x && ref.x < px_size)
 417                                 if (0 <= ref.y && ref.y < px_size)
 418                                         in_any = true;
 419                 }
 420
 421                 Point offset = tileOffset(pt);
 422                 if (!in_any) {
 423                         Point2D.Double ref, lref;
 424                         ref = translatePoint(pt, tileCoordOffset(offset));
 425                         lref = translatePoint(last_pt, tileCoordOffset(offset));
 426
 427                         AltosSiteMapTile tile = createTile(offset);
 428                         tile.show(point.state, lref, ref);
 429                         initAndFinishMapAsync(tile, offset);
 430                 }
 431
 432                 scrollRocketToVisible(pt);
 433
 434                 if (force_ensure || offset != tileOffset(last_pt)) {
 435                         ensureTilesAround(offset);
 436                 }
 437         }
 438
 439         public void redraw() {
 440                 MapPoint        last_point = null;
 441
 442                 for (MapPoint point : points) {
 443                         draw(last_point, point);
 444                         last_point = point;
 445                 }
 446                 if (circle_set)
 447                         draw_circle(circle_lat, circle_lon);
 448                 if (line_start != null)
 449                         set_line();
 450         }
 451
 452         public void show(final AltosState state, final AltosListenerState listener_state) {
 453                 // if insufficient gps data, nothing to update
 454                 AltosGPS        gps = state.gps;
 455
 456                 if (gps == null)
 457                         return;
 458
 459                 if (!gps.locked && gps.nsat < 4)
 460                         return;
 461
 462                 if (!initialised) {
 463                         if (state.pad_lat != AltosLib.MISSING && state.pad_lon != AltosLib.MISSING) {
 464                                 initMaps(state.pad_lat, state.pad_lon);
 465                                 initialised = true;
 466                         } else if (gps.lat != AltosLib.MISSING && gps.lon != AltosLib.MISSING) {
 467                                 initMaps(gps.lat, gps.lon);
 468                                 initialised = true;
 469                         } else {
 470                                 return;
 471                         }
 472                 }
 473
 474                 MapPoint        point = new MapPoint(gps.lat, gps.lon, state.state);
 475
 476                 if (point.equals(last_point))
 477                         return;
 478
 479                 points.add(point);
 480
 481                 draw(last_point, point);
 482
 483                 last_point = point;
 484         }
 485
 486         public void centre(Point2D.Double pt) {
 487                 Rectangle r = comp.getVisibleRect();
 488                 Point2D.Double copt = translatePoint(pt, tileCoordOffset(topleft));
 489                 int dx = (int)copt.x - r.width/2 - r.x;
 490                 int dy = (int)copt.y - r.height/2 - r.y;
 491                 r.x += dx;
 492                 r.y += dy;
 493                 r.width = 1;
 494                 r.height = 1;
 495                 comp.scrollRectToVisible(r);
 496         }
 497
 498         public void centre(AltosState state) {
 499                 if (!state.gps.locked && state.gps.nsat < 4)
 500                         return;
 501                 centre(pt(state.gps.lat, state.gps.lon));
 502         }
 503
 504         private double circle_lat, circle_lon;
 505         private boolean circle_set = false;
 506
 507         public void draw_circle(double lat, double lon) {
 508                 circle_lat = lat;
 509                 circle_lon = lon;
 510                 circle_set = true;
 511
 512                 Point2D.Double pt = pt(lat, lon);
 513
 514                 for (Point offset : mapTiles.keySet()) {
 515                         AltosSiteMapTile tile = mapTiles.get(offset);
 516                         Point2D.Double ref = translatePoint(pt, tileCoordOffset(offset));
 517                         tile.set_boost(ref);
 518                 }
 519         }
 520
 521         private AltosSiteMapTile createTile(Point offset) {
 522                 AltosSiteMapTile tile = new AltosSiteMapTile(px_size);
 523                 tile.set_font(AltosUILib.value_font);
 524                 mapTiles.put(offset, tile);
 525                 return tile;
 526         }
 527         private void finishTileLater(final AltosSiteMapTile tile,
 528                                      final Point offset)
 529         {
 530                 SwingUtilities.invokeLater( new Runnable() {
 531                         public void run() {
 532                                 addTileAt(tile, offset);
 533                         }
 534                 } );
 535         }
 536
 537         private void ensureTilesAround(Point base_offset) {
 538                 for (int x = -radius; x <= radius; x++) {
 539                         for (int y = -radius; y <= radius; y++) {
 540                                 Point offset = new Point(base_offset.x + x, base_offset.y + y);
 541                                 if (mapTiles.containsKey(offset))
 542                                         continue;
 543                                 AltosSiteMapTile tile = createTile(offset);
 544                                 initAndFinishMapAsync(tile, offset);
 545                         }
 546                 }
 547         }
 548
 549         private Point topleft = new Point(0,0);
 550         private void scrollRocketToVisible(Point2D.Double pt) {
 551                 Rectangle r = comp.getVisibleRect();
 552                 Point2D.Double copt = translatePoint(pt, tileCoordOffset(topleft));
 553
 554                 int dx = (int)copt.x - r.width/2 - r.x;
 555                 int dy = (int)copt.y - r.height/2 - r.y;
 556                 if (Math.abs(dx) > r.width/4 || Math.abs(dy) > r.height/4) {
 557                         r.x += dx;
 558                         r.y += dy;
 559                         comp.scrollRectToVisible(r);
 560                 }
 561         }
 562
 563         private void addTileAt(AltosSiteMapTile tile, Point offset) {
 564                 if (Math.abs(offset.x) >= MAX_TILE_DELTA ||
 565                                 Math.abs(offset.y) >= MAX_TILE_DELTA)
 566                 {
 567                         System.out.printf("Rocket too far away from pad (tile %d,%d)\n",
 568                                           offset.x, offset.y);
 569                         return;
 570                 }
 571
 572                 boolean review = false;
 573                 Rectangle r = comp.getVisibleRect();
 574                 if (offset.x < topleft.x) {
 575                         r.x += (topleft.x - offset.x) * px_size;
 576                         topleft.x = offset.x;
 577                         review = true;
 578                 }
 579                 if (offset.y < topleft.y) {
 580                         r.y += (topleft.y - offset.y) * px_size;
 581                         topleft.y = offset.y;
 582                         review = true;
 583                 }
 584                 GridBagConstraints c = new GridBagConstraints();
 585                 c.anchor = GridBagConstraints.CENTER;
 586                 c.fill = GridBagConstraints.BOTH;
 587                 // put some space between the map tiles, debugging only
 588                 // c.insets = new Insets(5, 5, 5, 5);
 589
 590                 c.gridx = offset.x + MAX_TILE_DELTA;
 591                 c.gridy = offset.y + MAX_TILE_DELTA;
 592                 layout.setConstraints(tile, c);
 593
 594                 comp.add(tile);
 595 //              if (review) {
 596 //                      comp.scrollRectToVisible(r);
 597 //              }
 598         }
 599
 600         private AltosSiteMap(boolean knowWhatYouAreDoing) {
 601                 if (!knowWhatYouAreDoing) {
 602                         throw new RuntimeException("Arggh.");
 603                 }
 604         }
 605
 606         JComponent comp;
 607
 608         private GridBagLayout layout = new GridBagLayout();
 609
 610         LatLng  line_start, line_end;
 611
 612         private void set_line() {
 613                 if (line_start != null && line_end != null) {
 614                         Point2D.Double  start = pt(line_start.lat, line_start.lng);
 615                         Point2D.Double  end = pt(line_end.lat, line_end.lng);
 616                         AltosGreatCircle        g = new AltosGreatCircle(line_start.lat, line_start.lng,
 617                                                                          line_end.lat, line_end.lng);
 618
 619                         for (Point offset : mapTiles.keySet()) {
 620                                 AltosSiteMapTile tile = mapTiles.get(offset);
 621                                 Point2D.Double s, e;
 622                                 s = translatePoint(start, tileCoordOffset(offset));
 623                                 e = translatePoint(end, tileCoordOffset(offset));
 624                                 tile.set_line(new Line2D.Double(s.x, s.y, e.x, e.y), g.distance);
 625                         }
 626                 } else {
 627                         for (AltosSiteMapTile tile : mapTiles.values())
 628                                 tile.set_line(null, 0);
 629                 }
 630         }
 631
 632         LatLng latlng(MouseEvent e) {
 633                 if (!base_location_set)
 634                         return null;
 635
 636                 Rectangle       zerozero = mapTiles.get(new Point(0, 0)).getBounds();
 637
 638                 return latlng(-centre.x + e.getPoint().x - zerozero.x, -centre.y + e.getPoint().y - zerozero.y);
 639         }
 640
 641         /* MouseMotionListener methods */
 642         public void mouseDragged(MouseEvent e) {
 643                 if (!GrabNDrag.grab_n_drag(e)) {
 644                         LatLng  loc = latlng(e);
 645                         line_end = loc;
 646                         set_line();
 647                 }
 648         }
 649
 650         public void mouseMoved(MouseEvent e) {
 651         }
 652
 653         /* MouseListener methods */
 654         public void mouseClicked(MouseEvent e) {
 655         }
 656
 657         public void mouseEntered(MouseEvent e) {
 658         }
 659
 660         public void mouseExited(MouseEvent e) {
 661         }
 662
 663         public void mousePressed(MouseEvent e) {
 664                 if (!GrabNDrag.grab_n_drag(e)) {
 665                         LatLng  loc = latlng(e);
 666                         line_start = loc;
 667                         line_end = null;
 668                         set_line();
 669                 }
 670         }
 671
 672         public void mouseReleased(MouseEvent e) {
 673         }
 674
 675         JScrollPane     pane = new JScrollPane();
 676
 677         public AltosSiteMap(int in_radius) {
 678                 radius = in_radius;
 679
 680                 comp = new JComponent() { };
 681
 682                 comp.addMouseMotionListener(this);
 683                 comp.addMouseListener(this);
 684
 685                 GrabNDrag scroller = new GrabNDrag(comp);
 686
 687                 comp.setLayout(layout);
 688
 689                 for (int x = -radius; x <= radius; x++) {
 690                         for (int y = -radius; y <= radius; y++) {
 691                                 Point offset = new Point(x, y);
 692                                 AltosSiteMapTile t = createTile(offset);
 693                                 addTileAt(t, offset);
 694                         }
 695                 }
 696                 pane.setViewportView(comp);
 697                 pane.setPreferredSize(new Dimension(500,500));
 698                 pane.setVisible(true);
 699                 pane.setEnabled(true);
 700
 701                 GridBagLayout   my_layout = new GridBagLayout();
 702
 703                 setLayout(my_layout);
 704
 705                 GridBagConstraints c = new GridBagConstraints();
 706                 c.anchor = GridBagConstraints.CENTER;
 707                 c.fill = GridBagConstraints.BOTH;
 708                 c.gridx = 0;
 709                 c.gridy = 0;
 710                 c.gridwidth = 1;
 711                 c.gridheight = 10;
 712                 c.weightx = 1;
 713                 c.weighty = 1;
 714                 add(pane, c);
 715
 716                 int     y = 0;
 717
 718                 zoom_label = new JLabel("", JLabel.CENTER);
 719                 set_zoom_label();
 720
 721                 c = new GridBagConstraints();
 722                 c.anchor = GridBagConstraints.CENTER;
 723                 c.fill = GridBagConstraints.HORIZONTAL;
 724                 c.gridx = 1;
 725                 c.gridy = y++;
 726                 c.weightx = 0;
 727                 c.weighty = 0;
 728                 add(zoom_label, c);
 729
 730                 JButton zoom_reset = new JButton("0");
 731                 zoom_reset.addActionListener(new ActionListener() {
 732                                 public void actionPerformed(ActionEvent e) {
 733                                         set_zoom(default_zoom);
 734                                 }
 735                         });
 736
 737                 c = new GridBagConstraints();
 738                 c.anchor = GridBagConstraints.CENTER;
 739                 c.fill = GridBagConstraints.HORIZONTAL;
 740                 c.gridx = 1;
 741                 c.gridy = y++;
 742                 c.weightx = 0;
 743                 c.weighty = 0;
 744                 add(zoom_reset, c);
 745
 746                 JButton zoom_in = new JButton("+");
 747                 zoom_in.addActionListener(new ActionListener() {
 748                                 public void actionPerformed(ActionEvent e) {
 749                                         set_zoom(get_zoom() + 1);
 750                                 }
 751                         });
 752
 753                 c = new GridBagConstraints();
 754                 c.anchor = GridBagConstraints.CENTER;
 755                 c.fill = GridBagConstraints.HORIZONTAL;
 756                 c.gridx = 1;
 757                 c.gridy = y++;
 758                 c.weightx = 0;
 759                 c.weighty = 0;
 760                 add(zoom_in, c);
 761
 762                 JButton zoom_out = new JButton("-");
 763                 zoom_out.addActionListener(new ActionListener() {
 764                                 public void actionPerformed(ActionEvent e) {
 765                                         set_zoom(get_zoom() - 1);
 766                                 }
 767                         });
 768                 c = new GridBagConstraints();
 769                 c.anchor = GridBagConstraints.CENTER;
 770                 c.fill = GridBagConstraints.HORIZONTAL;
 771                 c.gridx = 1;
 772                 c.gridy = y++;
 773                 c.weightx = 0;
 774                 c.weighty = 0;
 775                 add(zoom_out, c);
 776
 777                 final JComboBox<String> maptype_combo = new JComboBox<String>(maptype_labels);
 778
 779                 maptype_combo.setEditable(false);
 780                 maptype_combo.setMaximumRowCount(maptype_combo.getItemCount());
 781                 maptype_combo.addItemListener(new ItemListener() {
 782                                 public void itemStateChanged(ItemEvent e) {
 783                                         maptype = maptype_combo.getSelectedIndex();
 784                                         if (base_location_set)
 785                                                 initMaps(lat, lon);
 786                                         redraw();
 787                                 }
 788                         });
 789
 790                 c = new GridBagConstraints();
 791                 c.anchor = GridBagConstraints.CENTER;
 792                 c.fill = GridBagConstraints.HORIZONTAL;
 793                 c.gridx = 1;
 794                 c.gridy = y++;
 795                 c.weightx = 0;
 796                 c.weighty = 0;
 797                 add(maptype_combo, c);
 798         }
 799
 800         public AltosSiteMap() {
 801                 this(1);
 802         }
 803 }