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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.altoslib_11;
  19
  20 import java.io.*;
  21 import java.lang.*;
  22 import java.util.*;
  23 import java.util.concurrent.*;
  24
  25 public class AltosMap implements AltosMapTileListener, AltosMapStoreListener {
  26
  27         public static final int px_size = 512;
  28
  29         public static final int maptype_hybrid = 0;
  30         public static final int maptype_roadmap = 1;
  31         public static final int maptype_satellite = 2;
  32         public static final int maptype_terrain = 3;
  33         public static final int maptype_default = maptype_hybrid;
  34
  35         public static final int default_zoom = 15;
  36         public static final int min_zoom = 3;
  37         public static final int max_zoom = 21;
  38
  39         public static final String[] maptype_names = {
  40                 "hybrid",
  41                 "roadmap",
  42                 "satellite",
  43                 "terrain"
  44         };
  45
  46         public static final String[] maptype_labels = {
  47                 "Hybrid",
  48                 "Roadmap",
  49                 "Satellite",
  50                 "Terrain"
  51         };
  52
  53         AltosMapInterface       map_interface;
  54         int                     scale;
  55
  56         AltosMapCache           cache;
  57
  58         public AltosMapCache cache() { return cache; }
  59
  60         LinkedList<AltosMapMark> marks = new LinkedList<AltosMapMark>();
  61
  62         AltosMapPath            path;
  63         AltosMapLine            line;
  64         public AltosLatLon      last_position;
  65
  66         boolean         have_boost = false;
  67         boolean         have_landed = false;
  68
  69         ConcurrentHashMap<AltosPointInt,AltosMapTile> tiles = new ConcurrentHashMap<AltosPointInt,AltosMapTile>();
  70         int             load_radius;
  71         AltosLatLon     load_centre = null;
  72         AltosMapTileListener    load_listener;
  73
  74         int             zoom = AltosMap.default_zoom;
  75         int             maptype = AltosMap.maptype_default;
  76
  77         long            user_input_time;
  78
  79         /* Milliseconds to wait after user action before auto-scrolling
  80          */
  81         static final long auto_scroll_delay = 20 * 1000;
  82
  83         public AltosMapTransform        transform;
  84         AltosLatLon             centre;
  85
  86         public void reset() {
  87                 // nothing
  88         }
  89
  90         /* MapInterface wrapping functions */
  91
  92         public void repaint(int x, int y, int w, int h) {
  93                 map_interface.repaint(new AltosRectangle(x, y, w, h));
  94         }
  95
  96         public void repaint(AltosMapRectangle damage, int pad) {
  97                 AltosRectangle r = transform.screen(damage);
  98                 repaint(r.x - pad, r.y - pad, r.width + pad * 2, r.height + pad * 2);
  99         }
 100
 101         public void repaint() {
 102                 map_interface.repaint();
 103         }
 104
 105         public int width() {
 106                 return map_interface.width();
 107         }
 108
 109         public int height() {
 110                 return map_interface.height();
 111         }
 112
 113         public void debug(String format, Object ... arguments) {
 114                 map_interface.debug(format, arguments);
 115         }
 116
 117         static public AltosPointInt floor(AltosPointDouble point) {
 118                 return new AltosPointInt ((int) Math.floor(point.x / AltosMap.px_size) * AltosMap.px_size,
 119                                               (int) Math.floor(point.y / AltosMap.px_size) * AltosMap.px_size);
 120         }
 121
 122         static public AltosPointInt ceil(AltosPointDouble point) {
 123                 return new AltosPointInt ((int) Math.ceil(point.x / AltosMap.px_size) * AltosMap.px_size,
 124                                               (int) Math.ceil(point.y / AltosMap.px_size) * AltosMap.px_size);
 125         }
 126
 127         public void notice_user_input() {
 128                 user_input_time = System.currentTimeMillis();
 129         }
 130
 131         public boolean recent_user_input() {
 132                 return (System.currentTimeMillis() - user_input_time) < auto_scroll_delay;
 133         }
 134
 135         public boolean has_centre() {
 136                 return centre != null;
 137         }
 138
 139         public boolean far_from_centre(AltosLatLon lat_lon) {
 140
 141                 if (centre == null || transform == null)
 142                         return true;
 143
 144                 AltosPointDouble        screen = transform.screen(lat_lon);
 145
 146                 int             width = width();
 147                 int             dx = Math.abs ((int) (double) screen.x - width/2);
 148
 149                 if (dx > width / 4)
 150                         return true;
 151
 152                 int             height = height();
 153                 int             dy = Math.abs ((int) (double) screen.y - height/2);
 154
 155                 if (dy > height / 4)
 156                         return true;
 157
 158                 return false;
 159         }
 160
 161         public void set_transform() {
 162                 if (centre != null) {
 163                         transform = new AltosMapTransform(width(), height(), zoom, centre);
 164                         repaint();
 165                 }
 166         }
 167
 168         private void set_zoom_label() {
 169                 map_interface.set_zoom_label(String.format("Zoom %d", get_zoom() - default_zoom));
 170         }
 171
 172
 173         public boolean set_zoom(int zoom) {
 174                 notice_user_input();
 175                 if (AltosMap.min_zoom <= zoom && zoom <= AltosMap.max_zoom && zoom != this.zoom) {
 176                         this.zoom = zoom;
 177                         tiles.clear();
 178                         set_transform();
 179                         set_zoom_label();
 180                         return true;
 181                 }
 182                 return false;
 183         }
 184
 185         public boolean set_zoom_centre(int zoom, AltosPointInt centre) {
 186                 AltosLatLon     mouse_lat_lon = null;
 187                 boolean         ret;
 188
 189                 if (transform != null)
 190                         mouse_lat_lon = transform.screen_lat_lon(centre);
 191
 192                 ret = set_zoom(zoom);
 193
 194                 if (ret && mouse_lat_lon != null) {
 195                         AltosPointDouble        new_mouse = transform.screen(mouse_lat_lon);
 196
 197                         double  dx = width()/2.0 - centre.x;
 198                         double  dy = height()/2.0 - centre.y;
 199
 200                         AltosLatLon     new_centre = transform.screen_lat_lon(new AltosPointDouble(new_mouse.x + dx, new_mouse.y + dy));
 201
 202                         centre(new_centre);
 203                 }
 204
 205                 return ret;
 206         }
 207
 208         public int get_zoom() {
 209                 return zoom;
 210         }
 211
 212         public boolean set_maptype(int maptype) {
 213                 if (maptype != this.maptype) {
 214                         this.maptype = maptype;
 215                         tiles.clear();
 216                         repaint();
 217                         return true;
 218                 }
 219                 return false;
 220         }
 221
 222         public void show(AltosState state, AltosListenerState listener_state) {
 223
 224                 /* If insufficient gps data, nothing to update
 225                  */
 226                 AltosGPS        gps = state.gps;
 227
 228                 if (gps == null)
 229                         return;
 230
 231                 if (!gps.locked && gps.nsat < 4)
 232                         return;
 233
 234                 switch (state.state()) {
 235                 case AltosLib.ao_flight_boost:
 236                         if (!have_boost) {
 237                                 add_mark(gps.lat, gps.lon, state.state());
 238                                 have_boost = true;
 239                         }
 240                         break;
 241                 case AltosLib.ao_flight_landed:
 242                         if (!have_landed) {
 243                                 add_mark(gps.lat, gps.lon, state.state());
 244                                 have_landed = true;
 245                         }
 246                         break;
 247                 }
 248
 249                 if (path != null) {
 250                         AltosMapRectangle       damage = path.add(gps.lat, gps.lon, state.state());
 251
 252                         if (damage != null)
 253                                 repaint(damage, AltosMapPath.stroke_width);
 254                 }
 255
 256                 last_position = new AltosLatLon(gps.lat, gps.lon);
 257
 258                 maybe_centre(gps.lat, gps.lon);
 259         }
 260
 261         public void centre(AltosLatLon lat_lon) {
 262                 centre = lat_lon;
 263                 set_transform();
 264         }
 265
 266         public void centre(double lat, double lon) {
 267                 centre(new AltosLatLon(lat, lon));
 268         }
 269
 270         public void centre(AltosState state) {
 271                 if (!state.gps.locked && state.gps.nsat < 4)
 272                         return;
 273                 centre(state.gps.lat, state.gps.lon);
 274         }
 275
 276         public void maybe_centre(double lat, double lon) {
 277                 AltosLatLon     lat_lon = new AltosLatLon(lat, lon);
 278                 if (centre == null || (!recent_user_input() && far_from_centre(lat_lon)))
 279                         centre(lat_lon);
 280         }
 281
 282         public void add_mark(double lat, double lon, int state) {
 283                 synchronized(marks) {
 284                         AltosMapMark mark = map_interface.new_mark(lat, lon, state);
 285                         if (mark != null)
 286                                 marks.add(mark);
 287                 }
 288                 repaint();
 289         }
 290
 291         public void clear_marks() {
 292                 synchronized(marks) {
 293                         marks.clear();
 294                 }
 295         }
 296
 297         private void make_tiles() {
 298                 AltosPointInt   upper_left;
 299                 AltosPointInt   lower_right;
 300
 301                 if (load_centre != null) {
 302                         AltosPointInt centre = floor(transform.point(load_centre));
 303
 304                         upper_left = new AltosPointInt(centre.x - load_radius * AltosMap.px_size,
 305                                                                centre.y - load_radius * AltosMap.px_size);
 306                         lower_right = new AltosPointInt(centre.x + load_radius * AltosMap.px_size,
 307                                                                 centre.y + load_radius * AltosMap.px_size);
 308                 } else {
 309                         upper_left = floor(transform.screen_point(new AltosPointInt(0, 0)));
 310                         lower_right = floor(transform.screen_point(new AltosPointInt(width(), height())));
 311                 }
 312
 313                 Enumeration<AltosPointInt> keyEnumeration = tiles.keys();
 314
 315                 while (keyEnumeration.hasMoreElements()) {
 316                         AltosPointInt point = keyEnumeration.nextElement();
 317                         if (point.x < upper_left.x || lower_right.x < point.x ||
 318                             point.y < upper_left.y || lower_right.y < point.y) {
 319                                 tiles.remove(point);
 320                         }
 321                 }
 322
 323                 cache.set_cache_size((width() / AltosMap.px_size + 2) * (height() / AltosMap.px_size + 2));
 324
 325                 for (int y = (int) upper_left.y; y <= lower_right.y; y += AltosMap.px_size) {
 326                         for (int x = (int) upper_left.x; x <= lower_right.x; x += AltosMap.px_size) {
 327                                 AltosPointInt   point = new AltosPointInt(x, y);
 328
 329                                 if (!tiles.containsKey(point)) {
 330                                         AltosLatLon     ul = transform.lat_lon(point);
 331                                         AltosLatLon     center = transform.lat_lon(new AltosPointDouble(x + AltosMap.px_size/2, y + AltosMap.px_size/2));
 332                                         AltosMapTile tile = map_interface.new_tile(cache, ul, center, zoom, maptype, px_size, scale);
 333                                         debug("show state %s url %s\n", AltosMapTile.status_name(tile.store.status()), tile.store.url);
 334                                         tile.add_listener(this);
 335                                         tiles.put(point, tile);
 336                                 }
 337                         }
 338                 }
 339         }
 340
 341         public void set_load_params(int new_zoom, int new_type, double lat, double lon, int radius, AltosMapTileListener listener) {
 342                 if (AltosMap.min_zoom <= new_zoom && new_zoom <= AltosMap.max_zoom)
 343                         zoom = new_zoom;
 344                 maptype = new_type;
 345                 load_centre = new AltosLatLon(lat, lon);
 346                 load_radius = radius;
 347                 load_listener = listener;
 348                 centre(lat, lon);
 349                 tiles.clear();
 350                 make_tiles();
 351                 repaint();
 352         }
 353
 354         public String getName() {
 355                 return "Map";
 356         }
 357
 358         public void paint() {
 359                 if (centre != null)
 360                         make_tiles();
 361
 362                 if (transform == null)
 363                         return;
 364
 365                 for (AltosMapTile tile : tiles.values())
 366                         tile.paint(transform);
 367
 368                 synchronized(marks) {
 369                         for (AltosMapMark mark : marks)
 370                                 mark.paint(transform);
 371                 }
 372
 373                 if (path != null)
 374                         path.paint(transform);
 375
 376                 if (line != null)
 377                         line.paint(transform);
 378         }
 379
 380         /* AltosMapTileListener methods */
 381         public synchronized void notify_tile(AltosMapTile tile, int status) {
 382                 Enumeration<AltosPointInt> keyEnumeration = tiles.keys();
 383
 384                 while (keyEnumeration.hasMoreElements()) {
 385                         AltosPointInt point = keyEnumeration.nextElement();
 386                         if (tile == tiles.get(point)) {
 387                                 AltosPointInt   screen = transform.screen(point);
 388                                 repaint(screen.x, screen.y, AltosMap.px_size, AltosMap.px_size);
 389                         }
 390                 }
 391         }
 392
 393         /* AltosMapStoreListener methods */
 394         public synchronized void notify_store(AltosMapStore store, int status) {
 395                 if (load_listener != null) {
 396                         for (AltosMapTile tile : tiles.values())
 397                                 if (store.equals(tile.store))
 398                                         load_listener.notify_tile(tile, status);
 399                 }
 400         }
 401
 402         /* UI elements */
 403
 404         AltosPointInt   drag_start;
 405
 406         boolean         dragged;
 407
 408         static final double drag_far = 20;
 409
 410         private void drag(int x, int y) {
 411                 if (drag_start == null)
 412                         return;
 413
 414                 int dx = x - drag_start.x;
 415                 int dy = y - drag_start.y;
 416
 417                 double distance = Math.hypot(dx, dy);
 418
 419                 if (distance > drag_far)
 420                         dragged = true;
 421
 422                 if (transform == null)
 423                         return;
 424
 425                 AltosLatLon new_centre = transform.screen_lat_lon(new AltosPointInt(width() / 2 - dx, height() / 2 - dy));
 426                 centre(new_centre);
 427                 drag_start = new AltosPointInt(x, y);
 428         }
 429
 430         private void drag_start(int x, int y) {
 431                 drag_start = new AltosPointInt(x, y);
 432                 dragged = false;
 433         }
 434
 435         private void drag_stop(int x, int y) {
 436                 if (!dragged) {
 437                         if (transform == null) {
 438                                 return;
 439                         }
 440                         map_interface.select_object (transform.screen_lat_lon(new AltosPointInt(x,y)));
 441                 }
 442         }
 443
 444         private void line_start(int x, int y) {
 445                 if (line != null && transform != null) {
 446                         line.pressed(new AltosPointInt(x, y), transform);
 447                         repaint();
 448                 }
 449         }
 450
 451         private void line(int x, int y) {
 452                 if (line != null && transform != null) {
 453                         line.dragged(new AltosPointInt(x, y), transform);
 454                         repaint();
 455                 }
 456         }
 457
 458         public void touch_start(int x, int y, boolean is_drag) {
 459                 notice_user_input();
 460                 if (is_drag)
 461                         drag_start(x, y);
 462                 else
 463                         line_start(x, y);
 464         }
 465
 466         public void touch_continue(int x, int y, boolean is_drag) {
 467                 notice_user_input();
 468                 if (is_drag)
 469                         drag(x, y);
 470                 else
 471                         line(x, y);
 472         }
 473
 474         public void touch_stop(int x, int y, boolean is_drag) {
 475                 notice_user_input();
 476                 if (is_drag)
 477                         drag_stop(x, y);
 478         }
 479
 480         public AltosMap(AltosMapInterface map_interface, int scale) {
 481                 this.map_interface = map_interface;
 482                 this.scale = scale;
 483                 cache = new AltosMapCache(map_interface);
 484                 line = map_interface.new_line();
 485                 path = map_interface.new_path();
 486                 set_zoom_label();
 487         }
 488
 489         public AltosMap(AltosMapInterface map_interface) {
 490                 this(map_interface, 1);
 491         }
 492 }