git.gag.com Git - fw/altos/blob - altosuilib/AltosSiteMap.java

   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         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         public 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) {
 261                 int w = AltosSiteMapPreload.width;
 262                 int h = AltosSiteMapPreload.height;
 263                 AltosSiteMap asm = new AltosSiteMap(true);
 264                 asm.centre = asm.getBaseLocation(lat, lng);
 265
 266                 //Point2D.Double p = new Point2D.Double();
 267                 //Point2D.Double p2;
 268                 int dx = -w/2, dy = -h/2;
 269                 for (int y = dy; y < h+dy; y++) {
 270                         for (int x = dx; x < w+dx; x++) {
 271                                 AltosSiteMapPrefetch prefetch = asm.prefetchMap(x, y);
 272                                 switch (prefetch.result) {
 273                                 case 1:
 274                                         System.out.printf("Already have %s\n", prefetch.pngfile);
 275                                         break;
 276                                 case 0:
 277                                         System.out.printf("Fetched map %s\n", prefetch.pngfile);
 278                                         break;
 279                                 case -1:
 280                                         System.out.printf("# Failed to fetch file %s\n", prefetch.pngfile);
 281                                         System.out.printf(" wget -O '%s' ''\n",
 282                                                           prefetch.pngfile, prefetch.pngurl);
 283                                         break;
 284                                 }
 285                         }
 286                 }
 287         }
 288
 289         public File init_map(Point offset, int load_mode) {
 290                 AltosSiteMapTile tile = mapTiles.get(offset);
 291                 Point2D.Double coord = tileCoordOffset(offset);
 292
 293                 LatLng map_latlng = latlng(px_size/2-coord.x, px_size/2-coord.y);
 294
 295                 File pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom, maptype);
 296                 String pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom, maptype);
 297                 load_map(tile, pngfile, pngurl, load_mode);
 298                 return pngfile;
 299         }
 300
 301         public void initAndFinishMapAsync (final AltosSiteMapTile tile, final Point offset) {
 302                 Thread thread = new Thread() {
 303                                 public void run() {
 304                                         init_map(offset, load_mode_cached|load_mode_uncached);
 305                                         SwingUtilities.invokeLater( new Runnable() {
 306                                                         public void run() {
 307                                                                 addTileAt(tile, offset);
 308                                                         }
 309                                                 } );
 310                                 }
 311                         };
 312                 thread.start();
 313         }
 314
 315         double  lat, lon;
 316         boolean base_location_set = false;
 317
 318         public void clear_base_location() {
 319                 base_location_set = false;
 320                 circle_set = false;
 321                 points = new LinkedList<MapPoint>();
 322                 line_start = line_end = null;
 323         }
 324
 325         public void setBaseLocation(double lat, double lng) {
 326                 this.lat = lat;
 327                 this.lon = lng;
 328                 base_location_set = true;
 329
 330                 centre = getBaseLocation(lat, lng);
 331                 scrollRocketToVisible(pt(lat,lng));
 332         }
 333
 334         private void initMaps(double lat, double lng) {
 335                 setBaseLocation(lat, lng);
 336
 337                 for (AltosSiteMapTile tile : mapTiles.values())
 338                         tile.clearMap();
 339                 Thread thread = new Thread() {
 340                                 public void run() {
 341                                         for (Point k : mapTiles.keySet())
 342                                                 init_map(k, load_mode_cached);
 343                                         for (Point k : mapTiles.keySet())
 344                                                 init_map(k, load_mode_uncached);
 345                                 }
 346                         };
 347                 thread.start();
 348         }
 349
 350         private static File MapFile(double lat, double lng, int zoom, int maptype) {
 351                 char chlat = lat < 0 ? 'S' : 'N';
 352                 char chlng = lng < 0 ? 'W' : 'E';
 353                 if (lat < 0) lat = -lat;
 354                 if (lng < 0) lng = -lng;
 355                 String maptype_string = String.format("%s-", maptype_names[maptype]);
 356                 String format_string;
 357                 if (maptype == maptype_hybrid || maptype == maptype_satellite || maptype == maptype_terrain)
 358                         format_string = "jpg";
 359                 else
 360                         format_string = "png";
 361                 return new File(AltosUIPreferences.mapdir(),
 362                                 String.format("map-%c%.6f,%c%.6f-%s%d.%s",
 363                                               chlat, lat, chlng, lng, maptype_string, zoom, format_string));
 364         }
 365
 366         private static String MapURL(double lat, double lng, int zoom, int maptype) {
 367                 String format_string;
 368                 if (maptype == maptype_hybrid || maptype == maptype_satellite || maptype == maptype_terrain)
 369                         format_string = "jpg";
 370                 else
 371                         format_string = "png32";
 372                 return String.format("http://maps.google.com/maps/api/staticmap?center=%.6f,%.6f&zoom=%d&size=%dx%d&sensor=false&maptype=%s&format=%s",
 373                                      lat, lng, zoom, px_size, px_size, maptype_names[maptype], format_string);
 374         }
 375
 376         boolean initialised = false;
 377         MapPoint last_point = null;
 378         int last_state = -1;
 379
 380         public void show(double lat, double lon) {
 381                 System.out.printf ("show %g %g\n", lat, lon);
 382                 return;
 383 //              initMaps(lat, lon);
 384 //              scrollRocketToVisible(pt(lat, lon));
 385         }
 386
 387         JLabel  zoom_label;
 388
 389         public void set_zoom_label() {
 390                 zoom_label.setText(String.format("Zoom %d", zoom - default_zoom));
 391         }
 392
 393         public void set_zoom(int zoom) {
 394                 if (min_zoom <= zoom && zoom <= max_zoom) {
 395                         this.zoom = zoom;
 396                         if (base_location_set)
 397                                 initMaps(lat, lon);
 398                         redraw();
 399                         set_zoom_label();
 400                 }
 401         }
 402
 403         public int get_zoom() {
 404                 return zoom;
 405         }
 406
 407         public void draw(MapPoint last_point, MapPoint point) {
 408                 boolean force_ensure = false;
 409                 if (last_point == null) {
 410                         force_ensure = true;
 411                         last_point = point;
 412                 }
 413
 414                 Point2D.Double pt = pt(point.lat, point.lon);
 415                 Point2D.Double last_pt = pt(last_point.lat, last_point.lon);
 416
 417                 boolean in_any = false;
 418                 for (Point offset : mapTiles.keySet()) {
 419                         AltosSiteMapTile tile = mapTiles.get(offset);
 420                         Point2D.Double ref, lref;
 421                         ref = translatePoint(pt, tileCoordOffset(offset));
 422                         lref = translatePoint(last_pt, tileCoordOffset(offset));
 423                         tile.show(point.state, lref, ref);
 424                         if (0 <= ref.x && ref.x < px_size)
 425                                 if (0 <= ref.y && ref.y < px_size)
 426                                         in_any = true;
 427                 }
 428
 429                 Point offset = tileOffset(pt);
 430                 if (!in_any) {
 431                         Point2D.Double ref, lref;
 432                         ref = translatePoint(pt, tileCoordOffset(offset));
 433                         lref = translatePoint(last_pt, tileCoordOffset(offset));
 434
 435                         AltosSiteMapTile tile = createTile(offset);
 436                         tile.show(point.state, lref, ref);
 437                         initAndFinishMapAsync(tile, offset);
 438                 }
 439
 440                 scrollRocketToVisible(pt);
 441
 442                 if (force_ensure || offset != tileOffset(last_pt)) {
 443                         ensureTilesAround(offset);
 444                 }
 445         }
 446
 447         public void redraw() {
 448                 MapPoint        last_point = null;
 449
 450                 for (MapPoint point : points) {
 451                         draw(last_point, point);
 452                         last_point = point;
 453                 }
 454                 if (circle_set)
 455                         draw_circle(circle_lat, circle_lon);
 456                 if (line_start != null)
 457                         set_line();
 458         }
 459
 460         public void show(final AltosState state, final AltosListenerState listener_state) {
 461                 // if insufficient gps data, nothing to update
 462                 AltosGPS        gps = state.gps;
 463
 464                 if (gps == null)
 465                         return;
 466
 467                 if (!gps.locked && gps.nsat < 4)
 468                         return;
 469
 470                 if (!initialised) {
 471                         if (state.pad_lat != AltosLib.MISSING && state.pad_lon != AltosLib.MISSING) {
 472                                 initMaps(state.pad_lat, state.pad_lon);
 473                                 initialised = true;
 474                         } else if (gps.lat != AltosLib.MISSING && gps.lon != AltosLib.MISSING) {
 475                                 initMaps(gps.lat, gps.lon);
 476                                 initialised = true;
 477                         } else {
 478                                 return;
 479                         }
 480                 }
 481
 482                 MapPoint        point = new MapPoint(gps.lat, gps.lon, state.state);
 483
 484                 if (point.equals(last_point))
 485                         return;
 486
 487                 points.add(point);
 488
 489                 draw(last_point, point);
 490
 491                 last_point = point;
 492         }
 493
 494         public void centre(Point2D.Double pt) {
 495                 Rectangle r = comp.getVisibleRect();
 496                 Point2D.Double copt = translatePoint(pt, tileCoordOffset(topleft));
 497                 int dx = (int)copt.x - r.width/2 - r.x;
 498                 int dy = (int)copt.y - r.height/2 - r.y;
 499                 r.x += dx;
 500                 r.y += dy;
 501                 r.width = 1;
 502                 r.height = 1;
 503                 comp.scrollRectToVisible(r);
 504         }
 505
 506         public void centre(AltosState state) {
 507                 if (!state.gps.locked && state.gps.nsat < 4)
 508                         return;
 509                 centre(pt(state.gps.lat, state.gps.lon));
 510         }
 511
 512         private double circle_lat, circle_lon;
 513         private boolean circle_set = false;
 514
 515         public void draw_circle(double lat, double lon) {
 516                 circle_lat = lat;
 517                 circle_lon = lon;
 518                 circle_set = true;
 519
 520                 Point2D.Double pt = pt(lat, lon);
 521
 522                 for (Point offset : mapTiles.keySet()) {
 523                         AltosSiteMapTile tile = mapTiles.get(offset);
 524                         Point2D.Double ref = translatePoint(pt, tileCoordOffset(offset));
 525                         tile.set_boost(ref);
 526                 }
 527         }
 528
 529         private AltosSiteMapTile createTile(Point offset) {
 530                 AltosSiteMapTile tile = new AltosSiteMapTile(px_size);
 531                 tile.set_font(AltosUILib.value_font);
 532                 mapTiles.put(offset, tile);
 533                 return tile;
 534         }
 535
 536         private void ensureTilesAround(Point base_offset) {
 537                 for (int x = -radius; x <= radius; x++) {
 538                         for (int y = -radius; y <= radius; y++) {
 539                                 Point offset = new Point(base_offset.x + x, base_offset.y + y);
 540                                 if (mapTiles.containsKey(offset))
 541                                         continue;
 542                                 AltosSiteMapTile tile = createTile(offset);
 543                                 initAndFinishMapAsync(tile, offset);
 544                         }
 545                 }
 546         }
 547
 548         private Point topleft = new Point(0,0);
 549         private void scrollRocketToVisible(Point2D.Double pt) {
 550                 Rectangle r = comp.getVisibleRect();
 551                 Point2D.Double copt = translatePoint(pt, tileCoordOffset(topleft));
 552
 553                 int dx = (int)copt.x - r.width/2 - r.x;
 554                 int dy = (int)copt.y - r.height/2 - r.y;
 555                 if (Math.abs(dx) > r.width/4 || Math.abs(dy) > r.height/4) {
 556                         r.x += dx;
 557                         r.y += dy;
 558                         comp.scrollRectToVisible(r);
 559                 }
 560         }
 561
 562         private void addTileAt(AltosSiteMapTile tile, Point offset) {
 563                 if (Math.abs(offset.x) >= MAX_TILE_DELTA ||
 564                                 Math.abs(offset.y) >= MAX_TILE_DELTA)
 565                 {
 566                         System.out.printf("Rocket too far away from pad (tile %d,%d)\n",
 567                                           offset.x, offset.y);
 568                         return;
 569                 }
 570
 571                 boolean review = false;
 572                 Rectangle r = comp.getVisibleRect();
 573                 if (offset.x < topleft.x) {
 574                         r.x += (topleft.x - offset.x) * px_size;
 575                         topleft.x = offset.x;
 576                         review = true;
 577                 }
 578                 if (offset.y < topleft.y) {
 579                         r.y += (topleft.y - offset.y) * px_size;
 580                         topleft.y = offset.y;
 581                         review = true;
 582                 }
 583                 GridBagConstraints c = new GridBagConstraints();
 584                 c.anchor = GridBagConstraints.CENTER;
 585                 c.fill = GridBagConstraints.BOTH;
 586                 // put some space between the map tiles, debugging only
 587                 // c.insets = new Insets(5, 5, 5, 5);
 588
 589                 c.gridx = offset.x + MAX_TILE_DELTA;
 590                 c.gridy = offset.y + MAX_TILE_DELTA;
 591                 layout.setConstraints(tile, c);
 592
 593                 comp.add(tile);
 594 //              if (review) {
 595 //                      comp.scrollRectToVisible(r);
 596 //              }
 597         }
 598
 599         private AltosSiteMap(boolean knowWhatYouAreDoing) {
 600                 if (!knowWhatYouAreDoing) {
 601                         throw new RuntimeException("Arggh.");
 602                 }
 603         }
 604
 605         JComponent comp;
 606
 607         private GridBagLayout layout = new GridBagLayout();
 608
 609         LatLng  line_start, line_end;
 610
 611         private void set_line() {
 612                 if (line_start != null && line_end != null) {
 613                         Point2D.Double  start = pt(line_start.lat, line_start.lng);
 614                         Point2D.Double  end = pt(line_end.lat, line_end.lng);
 615                         AltosGreatCircle        g = new AltosGreatCircle(line_start.lat, line_start.lng,
 616                                                                          line_end.lat, line_end.lng);
 617
 618                         for (Point offset : mapTiles.keySet()) {
 619                                 AltosSiteMapTile tile = mapTiles.get(offset);
 620                                 Point2D.Double s, e;
 621                                 s = translatePoint(start, tileCoordOffset(offset));
 622                                 e = translatePoint(end, tileCoordOffset(offset));
 623                                 tile.set_line(new Line2D.Double(s.x, s.y, e.x, e.y), g.distance);
 624                         }
 625                 } else {
 626                         for (AltosSiteMapTile tile : mapTiles.values())
 627                                 tile.set_line(null, 0);
 628                 }
 629         }
 630
 631         static void debug_component(Component who, String where) {
 632 //              Rectangle       r = who.getBounds();
 633 //              int             x = r.x / px_size;
 634 //              int             y = r.y / px_size;
 635 //
 636 //              System.out.printf ("%3d, %3d: %s\n", x, y, where);
 637         }
 638
 639         LatLng latlng(MouseEvent e) {
 640                 if (!base_location_set)
 641                         return null;
 642
 643                 Rectangle       zerozero = mapTiles.get(new Point(0, 0)).getBounds();
 644
 645                 return latlng(-centre.x + e.getPoint().x - zerozero.x, -centre.y + e.getPoint().y - zerozero.y);
 646         }
 647
 648         /* MouseMotionListener methods */
 649         public void mouseDragged(MouseEvent e) {
 650                 if (!GrabNDrag.grab_n_drag(e)) {
 651                         LatLng  loc = latlng(e);
 652                         line_end = loc;
 653                         set_line();
 654                 }
 655         }
 656
 657         public void mouseMoved(MouseEvent e) {
 658         }
 659
 660         /* MouseListener methods */
 661         public void mouseClicked(MouseEvent e) {
 662         }
 663
 664         public void mouseEntered(MouseEvent e) {
 665         }
 666
 667         public void mouseExited(MouseEvent e) {
 668         }
 669
 670         public void mousePressed(MouseEvent e) {
 671                 if (!GrabNDrag.grab_n_drag(e)) {
 672                         LatLng  loc = latlng(e);
 673                         line_start = loc;
 674                         line_end = null;
 675                         set_line();
 676                 }
 677         }
 678
 679         public void mouseReleased(MouseEvent e) {
 680         }
 681
 682         public void set_cache_size() {
 683                 Rectangle       r = comp.getVisibleRect();
 684
 685                 int     width_tiles = (r.width + 2*px_size) / px_size;
 686                 int     height_tiles = (r.height + 2*px_size) / px_size;
 687                 int     tiles = width_tiles * height_tiles;
 688                 AltosSiteMapCache.set_cache_size(tiles);
 689         }
 690
 691         /* HierarchyBoundsListener methods */
 692         public void ancestorMoved(HierarchyEvent e) {
 693                 set_cache_size();
 694         }
 695
 696         public void ancestorResized(HierarchyEvent e) {
 697                 set_cache_size();
 698         }
 699
 700         JScrollPane     pane = new JScrollPane();
 701
 702         public AltosSiteMap(int in_radius) {
 703                 radius = in_radius;
 704
 705                 comp = new JComponent() { };
 706
 707                 comp.addMouseMotionListener(this);
 708                 comp.addMouseListener(this);
 709                 comp.addHierarchyBoundsListener(this);
 710
 711                 GrabNDrag scroller = new GrabNDrag(comp);
 712
 713                 comp.setLayout(layout);
 714
 715                 for (int x = -radius; x <= radius; x++) {
 716                         for (int y = -radius; y <= radius; y++) {
 717                                 Point offset = new Point(x, y);
 718                                 AltosSiteMapTile t = createTile(offset);
 719                                 addTileAt(t, offset);
 720                         }
 721                 }
 722                 pane.setViewportView(comp);
 723                 pane.setPreferredSize(new Dimension(500,500));
 724                 pane.setVisible(true);
 725                 pane.setEnabled(true);
 726
 727                 GridBagLayout   my_layout = new GridBagLayout();
 728
 729                 setLayout(my_layout);
 730
 731                 GridBagConstraints c = new GridBagConstraints();
 732                 c.anchor = GridBagConstraints.CENTER;
 733                 c.fill = GridBagConstraints.BOTH;
 734                 c.gridx = 0;
 735                 c.gridy = 0;
 736                 c.gridwidth = 1;
 737                 c.gridheight = 10;
 738                 c.weightx = 1;
 739                 c.weighty = 1;
 740                 add(pane, c);
 741
 742                 int     y = 0;
 743
 744                 zoom_label = new JLabel("", JLabel.CENTER);
 745                 set_zoom_label();
 746
 747                 c = new GridBagConstraints();
 748                 c.anchor = GridBagConstraints.CENTER;
 749                 c.fill = GridBagConstraints.HORIZONTAL;
 750                 c.gridx = 1;
 751                 c.gridy = y++;
 752                 c.weightx = 0;
 753                 c.weighty = 0;
 754                 add(zoom_label, c);
 755
 756                 JButton zoom_reset = new JButton("0");
 757                 zoom_reset.addActionListener(new ActionListener() {
 758                                 public void actionPerformed(ActionEvent e) {
 759                                         set_zoom(default_zoom);
 760                                 }
 761                         });
 762
 763                 c = new GridBagConstraints();
 764                 c.anchor = GridBagConstraints.CENTER;
 765                 c.fill = GridBagConstraints.HORIZONTAL;
 766                 c.gridx = 1;
 767                 c.gridy = y++;
 768                 c.weightx = 0;
 769                 c.weighty = 0;
 770                 add(zoom_reset, c);
 771
 772                 JButton zoom_in = new JButton("+");
 773                 zoom_in.addActionListener(new ActionListener() {
 774                                 public void actionPerformed(ActionEvent e) {
 775                                         set_zoom(get_zoom() + 1);
 776                                 }
 777                         });
 778
 779                 c = new GridBagConstraints();
 780                 c.anchor = GridBagConstraints.CENTER;
 781                 c.fill = GridBagConstraints.HORIZONTAL;
 782                 c.gridx = 1;
 783                 c.gridy = y++;
 784                 c.weightx = 0;
 785                 c.weighty = 0;
 786                 add(zoom_in, c);
 787
 788                 JButton zoom_out = new JButton("-");
 789                 zoom_out.addActionListener(new ActionListener() {
 790                                 public void actionPerformed(ActionEvent e) {
 791                                         set_zoom(get_zoom() - 1);
 792                                 }
 793                         });
 794                 c = new GridBagConstraints();
 795                 c.anchor = GridBagConstraints.CENTER;
 796                 c.fill = GridBagConstraints.HORIZONTAL;
 797                 c.gridx = 1;
 798                 c.gridy = y++;
 799                 c.weightx = 0;
 800                 c.weighty = 0;
 801                 add(zoom_out, c);
 802
 803                 final JComboBox<String> maptype_combo = new JComboBox<String>(maptype_labels);
 804
 805                 maptype_combo.setEditable(false);
 806                 maptype_combo.setMaximumRowCount(maptype_combo.getItemCount());
 807                 maptype_combo.addItemListener(new ItemListener() {
 808                                 public void itemStateChanged(ItemEvent e) {
 809                                         maptype = maptype_combo.getSelectedIndex();
 810                                         if (base_location_set)
 811                                                 initMaps(lat, lon);
 812                                         redraw();
 813                                 }
 814                         });
 815
 816                 c = new GridBagConstraints();
 817                 c.anchor = GridBagConstraints.CENTER;
 818                 c.fill = GridBagConstraints.HORIZONTAL;
 819                 c.gridx = 1;
 820                 c.gridy = y++;
 821                 c.weightx = 0;
 822                 c.weighty = 0;
 823                 add(maptype_combo, c);
 824         }
 825
 826         public AltosSiteMap() {
 827                 this(1);
 828         }
 829 }