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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_7;
  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
  55         AltosMapCache           cache;
  56
  57         public AltosMapCache cache() { return cache; }
  58
  59         LinkedList<AltosMapMark> marks = new LinkedList<AltosMapMark>();
  60
  61         AltosMapPath            path;
  62         AltosMapLine            line;
  63         public AltosLatLon      last_position;
  64
  65         boolean         have_boost = false;
  66         boolean         have_landed = false;
  67
  68         ConcurrentHashMap<AltosPointInt,AltosMapTile> tiles = new ConcurrentHashMap<AltosPointInt,AltosMapTile>();
  69         int             load_radius;
  70         AltosLatLon     load_centre = null;
  71         AltosMapTileListener    load_listener;
  72
  73         int             zoom = AltosMap.default_zoom;
  74         int             maptype = AltosMap.maptype_default;
  75
  76         long            user_input_time;
  77
  78         /* Milliseconds to wait after user action before auto-scrolling
  79          */
  80         static final long auto_scroll_delay = 20 * 1000;
  81
  82         public AltosMapTransform        transform;
  83         AltosLatLon             centre;
  84
  85         public void reset() {
  86                 // nothing
  87         }
  88
  89         /* MapInterface wrapping functions */
  90
  91         public void repaint(int x, int y, int w, int h) {
  92                 map_interface.repaint(new AltosRectangle(x, y, w, h));
  93         }
  94
  95         public void repaint(AltosMapRectangle damage, int pad) {
  96                 AltosRectangle r = transform.screen(damage);
  97                 repaint(r.x - pad, r.y - pad, r.width + pad * 2, r.height + pad * 2);
  98         }
  99
 100         public void repaint() {
 101                 map_interface.repaint();
 102         }
 103
 104         public int width() {
 105                 return map_interface.width();
 106         }
 107
 108         public int height() {
 109                 return map_interface.height();
 110         }
 111
 112         public void debug(String format, Object ... arguments) {
 113                 map_interface.debug(format, arguments);
 114         }
 115
 116         public AltosPointInt floor(AltosPointDouble point) {
 117                 return new AltosPointInt ((int) Math.floor(point.x / AltosMap.px_size) * AltosMap.px_size,
 118                                               (int) Math.floor(point.y / AltosMap.px_size) * AltosMap.px_size);
 119         }
 120
 121         public AltosPointInt ceil(AltosPointDouble point) {
 122                 return new AltosPointInt ((int) Math.ceil(point.x / AltosMap.px_size) * AltosMap.px_size,
 123                                               (int) Math.ceil(point.y / AltosMap.px_size) * AltosMap.px_size);
 124         }
 125
 126         public void notice_user_input() {
 127                 user_input_time = System.currentTimeMillis();
 128         }
 129
 130         public boolean recent_user_input() {
 131                 return (System.currentTimeMillis() - user_input_time) < auto_scroll_delay;
 132         }
 133
 134         public boolean has_centre() {
 135                 return centre != null;
 136         }
 137
 138         public boolean far_from_centre(AltosLatLon lat_lon) {
 139
 140                 if (centre == null || transform == null)
 141                         return true;
 142
 143                 AltosPointDouble        screen = transform.screen(lat_lon);
 144
 145                 int             width = width();
 146                 int             dx = Math.abs ((int) (double) screen.x - width/2);
 147
 148                 if (dx > width / 4)
 149                         return true;
 150
 151                 int             height = height();
 152                 int             dy = Math.abs ((int) (double) screen.y - height/2);
 153
 154                 if (dy > height / 4)
 155                         return true;
 156
 157                 return false;
 158         }
 159
 160         public void set_transform() {
 161                 if (centre != null) {
 162                         transform = new AltosMapTransform(width(), height(), zoom, centre);
 163                         repaint();
 164                 }
 165         }
 166
 167         private void set_zoom_label() {
 168                 map_interface.set_zoom_label(String.format("Zoom %d", get_zoom() - default_zoom));
 169         }
 170
 171
 172         public boolean set_zoom(int zoom) {
 173                 notice_user_input();
 174                 if (AltosMap.min_zoom <= zoom && zoom <= AltosMap.max_zoom && zoom != this.zoom) {
 175                         this.zoom = zoom;
 176                         tiles.clear();
 177                         set_transform();
 178                         set_zoom_label();
 179                         return true;
 180                 }
 181                 return false;
 182         }
 183
 184         public boolean set_zoom_centre(int zoom, AltosPointInt centre) {
 185                 AltosLatLon     mouse_lat_lon = null;
 186                 boolean         ret;
 187
 188                 if (transform != null)
 189                         mouse_lat_lon = transform.screen_lat_lon(centre);
 190
 191                 ret = set_zoom(zoom);
 192
 193                 if (ret && mouse_lat_lon != null) {
 194                         AltosPointDouble        new_mouse = transform.screen(mouse_lat_lon);
 195
 196                         double  dx = width()/2.0 - centre.x;
 197                         double  dy = height()/2.0 - centre.y;
 198
 199                         AltosLatLon     new_centre = transform.screen_lat_lon(new AltosPointDouble(new_mouse.x + dx, new_mouse.y + dy));
 200
 201                         centre(new_centre);
 202                 }
 203
 204                 return ret;
 205         }
 206
 207         public int get_zoom() {
 208                 return zoom;
 209         }
 210
 211         public boolean set_maptype(int maptype) {
 212                 if (maptype != this.maptype) {
 213                         this.maptype = maptype;
 214                         tiles.clear();
 215                         repaint();
 216                         return true;
 217                 }
 218                 return false;
 219         }
 220
 221         public void show(AltosState state, AltosListenerState listener_state) {
 222
 223                 /* If insufficient gps data, nothing to update
 224                  */
 225                 AltosGPS        gps = state.gps;
 226
 227                 if (gps == null)
 228                         return;
 229
 230                 if (!gps.locked && gps.nsat < 4)
 231                         return;
 232
 233                 switch (state.state) {
 234                 case AltosLib.ao_flight_boost:
 235                         if (!have_boost) {
 236                                 add_mark(gps.lat, gps.lon, state.state);
 237                                 have_boost = true;
 238                         }
 239                         break;
 240                 case AltosLib.ao_flight_landed:
 241                         if (!have_landed) {
 242                                 add_mark(gps.lat, gps.lon, state.state);
 243                                 have_landed = true;
 244                         }
 245                         break;
 246                 }
 247
 248                 if (path != null) {
 249                         AltosMapRectangle       damage = path.add(gps.lat, gps.lon, state.state);
 250
 251                         if (damage != null)
 252                                 repaint(damage, AltosMapPath.stroke_width);
 253                 }
 254
 255                 last_position = new AltosLatLon(gps.lat, gps.lon);
 256
 257                 maybe_centre(gps.lat, gps.lon);
 258         }
 259
 260         public void centre(AltosLatLon lat_lon) {
 261                 centre = lat_lon;
 262                 set_transform();
 263         }
 264
 265         public void centre(double lat, double lon) {
 266                 centre(new AltosLatLon(lat, lon));
 267         }
 268
 269         public void centre(AltosState state) {
 270                 if (!state.gps.locked && state.gps.nsat < 4)
 271                         return;
 272                 centre(state.gps.lat, state.gps.lon);
 273         }
 274
 275         public void maybe_centre(double lat, double lon) {
 276                 AltosLatLon     lat_lon = new AltosLatLon(lat, lon);
 277                 if (centre == null || (!recent_user_input() && far_from_centre(lat_lon)))
 278                         centre(lat_lon);
 279         }
 280
 281         public void add_mark(double lat, double lon, int state) {
 282                 synchronized(marks) {
 283                         AltosMapMark mark = map_interface.new_mark(lat, lon, state);
 284                         if (mark != null)
 285                                 marks.add(mark);
 286                 }
 287                 repaint();
 288         }
 289
 290         public void clear_marks() {
 291                 synchronized(marks) {
 292                         marks.clear();
 293                 }
 294         }
 295
 296         private void make_tiles() {
 297                 AltosPointInt   upper_left;
 298                 AltosPointInt   lower_right;
 299
 300                 if (load_centre != null) {
 301                         AltosPointInt centre = floor(transform.point(load_centre));
 302
 303                         upper_left = new AltosPointInt(centre.x - load_radius * AltosMap.px_size,
 304                                                                centre.y - load_radius * AltosMap.px_size);
 305                         lower_right = new AltosPointInt(centre.x + load_radius * AltosMap.px_size,
 306                                                                 centre.y + load_radius * AltosMap.px_size);
 307                 } else {
 308                         upper_left = floor(transform.screen_point(new AltosPointInt(0, 0)));
 309                         lower_right = floor(transform.screen_point(new AltosPointInt(width(), height())));
 310                 }
 311                 for (AltosPointInt point : tiles.keySet()) {
 312                         if (point.x < upper_left.x || lower_right.x < point.x ||
 313                             point.y < upper_left.y || lower_right.y < point.y) {
 314                                 tiles.remove(point);
 315                         }
 316                 }
 317
 318                 cache.set_cache_size((width() / AltosMap.px_size + 2) * (height() / AltosMap.px_size + 2));
 319
 320                 for (int y = (int) upper_left.y; y <= lower_right.y; y += AltosMap.px_size) {
 321                         for (int x = (int) upper_left.x; x <= lower_right.x; x += AltosMap.px_size) {
 322                                 AltosPointInt   point = new AltosPointInt(x, y);
 323
 324                                 if (!tiles.containsKey(point)) {
 325                                         AltosLatLon     ul = transform.lat_lon(point);
 326                                         AltosLatLon     center = transform.lat_lon(new AltosPointDouble(x + AltosMap.px_size/2, y + AltosMap.px_size/2));
 327                                         AltosMapTile tile = map_interface.new_tile(this, ul, center, zoom, maptype, px_size);
 328                                         tiles.put(point, tile);
 329                                 }
 330                         }
 331                 }
 332         }
 333
 334         public void set_load_params(int new_zoom, int new_type, double lat, double lon, int radius, AltosMapTileListener listener) {
 335                 if (AltosMap.min_zoom <= new_zoom && new_zoom <= AltosMap.max_zoom)
 336                         zoom = new_zoom;
 337                 maptype = new_type;
 338                 load_centre = new AltosLatLon(lat, lon);
 339                 load_radius = radius;
 340                 load_listener = listener;
 341                 centre(lat, lon);
 342                 tiles.clear();
 343                 make_tiles();
 344                 for (AltosMapTile tile : tiles.values()) {
 345                         tile.add_store_listener(this);
 346                         if (tile.store_status() != AltosMapTile.loading)
 347                                 listener.notify_tile(tile, tile.store_status());
 348                 }
 349                 repaint();
 350         }
 351
 352         public String getName() {
 353                 return "Map";
 354         }
 355
 356         public void paint() {
 357                 if (centre != null)
 358                         make_tiles();
 359
 360                 for (AltosMapTile tile : tiles.values())
 361                         tile.paint(transform);
 362
 363                 synchronized(marks) {
 364                         for (AltosMapMark mark : marks)
 365                                 mark.paint(transform);
 366                 }
 367
 368                 if (path != null)
 369                         path.paint(transform);
 370
 371                 if (line != null)
 372                         line.paint(transform);
 373         }
 374
 375         /* AltosMapTileListener methods */
 376         public synchronized void notify_tile(AltosMapTile tile, int status) {
 377                 for (AltosPointInt point : tiles.keySet()) {
 378                         if (tile == tiles.get(point)) {
 379                                 AltosPointInt   screen = transform.screen(point);
 380                                 repaint(screen.x, screen.y, AltosMap.px_size, AltosMap.px_size);
 381                         }
 382                 }
 383         }
 384
 385         /* AltosMapStoreListener methods */
 386         public synchronized void notify_store(AltosMapStore store, int status) {
 387                 if (load_listener != null) {
 388                         for (AltosMapTile tile : tiles.values())
 389                                 if (store.equals(tile.store))
 390                                         load_listener.notify_tile(tile, status);
 391                 }
 392         }
 393
 394         /* UI elements */
 395
 396         AltosPointInt   drag_start;
 397
 398         boolean         dragged;
 399
 400         static final double drag_far = 20;
 401
 402         private void drag(int x, int y) {
 403                 if (drag_start == null)
 404                         return;
 405
 406                 int dx = x - drag_start.x;
 407                 int dy = y - drag_start.y;
 408
 409                 double distance = Math.hypot(dx, dy);
 410
 411                 if (distance > drag_far)
 412                         dragged = true;
 413
 414                 if (transform == null) {
 415                         debug("Transform not set in drag\n");
 416                         return;
 417                 }
 418
 419                 AltosLatLon new_centre = transform.screen_lat_lon(new AltosPointInt(width() / 2 - dx, height() / 2 - dy));
 420                 centre(new_centre);
 421                 drag_start = new AltosPointInt(x, y);
 422         }
 423
 424         private void drag_start(int x, int y) {
 425                 drag_start = new AltosPointInt(x, y);
 426                 dragged = false;
 427         }
 428
 429         private void drag_stop(int x, int y) {
 430                 if (!dragged) {
 431                         if (transform == null) {
 432                                 debug("Transform not set in stop\n");
 433                                 return;
 434                         }
 435                         map_interface.select_object (transform.screen_lat_lon(new AltosPointInt(x,y)));
 436                 }
 437         }
 438
 439         private void line_start(int x, int y) {
 440                 if (line != null) {
 441                         line.pressed(new AltosPointInt(x, y), transform);
 442                         repaint();
 443                 }
 444         }
 445
 446         private void line(int x, int y) {
 447                 if (line != null) {
 448                         line.dragged(new AltosPointInt(x, y), transform);
 449                         repaint();
 450                 }
 451         }
 452
 453         public void touch_start(int x, int y, boolean is_drag) {
 454                 notice_user_input();
 455                 if (is_drag)
 456                         drag_start(x, y);
 457                 else
 458                         line_start(x, y);
 459         }
 460
 461         public void touch_continue(int x, int y, boolean is_drag) {
 462                 notice_user_input();
 463                 if (is_drag)
 464                         drag(x, y);
 465                 else
 466                         line(x, y);
 467         }
 468
 469         public void touch_stop(int x, int y, boolean is_drag) {
 470                 notice_user_input();
 471                 if (is_drag)
 472                         drag_stop(x, y);
 473         }
 474
 475         public AltosMap(AltosMapInterface map_interface) {
 476                 this.map_interface = map_interface;
 477                 cache = new AltosMapCache(map_interface);
 478                 line = map_interface.new_line();
 479                 path = map_interface.new_path();
 480                 set_zoom_label();
 481         }
 482 }