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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 far_from_centre(AltosLatLon lat_lon) {
 135
 136                 if (centre == null || transform == null)
 137                         return true;
 138
 139                 AltosPointDouble        screen = transform.screen(lat_lon);
 140
 141                 int             width = width();
 142                 int             dx = Math.abs ((int) (double) screen.x - width/2);
 143
 144                 if (dx > width / 4)
 145                         return true;
 146
 147                 int             height = height();
 148                 int             dy = Math.abs ((int) (double) screen.y - height/2);
 149
 150                 if (dy > height / 4)
 151                         return true;
 152
 153                 return false;
 154         }
 155
 156         public void set_transform() {
 157                 if (centre != null) {
 158                         transform = new AltosMapTransform(width(), height(), zoom, centre);
 159                         repaint();
 160                 }
 161         }
 162
 163         private void set_zoom_label() {
 164                 map_interface.set_zoom_label(String.format("Zoom %d", get_zoom() - default_zoom));
 165         }
 166
 167
 168         public boolean set_zoom(int zoom) {
 169                 if (AltosMap.min_zoom <= zoom && zoom <= AltosMap.max_zoom && zoom != this.zoom) {
 170                         this.zoom = zoom;
 171                         tiles.clear();
 172                         set_transform();
 173                         set_zoom_label();
 174                         return true;
 175                 }
 176                 return false;
 177         }
 178
 179         public int get_zoom() {
 180                 return zoom;
 181         }
 182
 183         public boolean set_maptype(int maptype) {
 184                 if (maptype != this.maptype) {
 185                         this.maptype = maptype;
 186                         tiles.clear();
 187                         repaint();
 188                         return true;
 189                 }
 190                 return false;
 191         }
 192
 193         public void show(AltosState state, AltosListenerState listener_state) {
 194
 195                 /* If insufficient gps data, nothing to update
 196                  */
 197                 AltosGPS        gps = state.gps;
 198
 199                 if (gps == null)
 200                         return;
 201
 202                 if (!gps.locked && gps.nsat < 4)
 203                         return;
 204
 205                 switch (state.state) {
 206                 case AltosLib.ao_flight_boost:
 207                         if (!have_boost) {
 208                                 add_mark(gps.lat, gps.lon, state.state);
 209                                 have_boost = true;
 210                         }
 211                         break;
 212                 case AltosLib.ao_flight_landed:
 213                         if (!have_landed) {
 214                                 add_mark(gps.lat, gps.lon, state.state);
 215                                 have_landed = true;
 216                         }
 217                         break;
 218                 }
 219
 220                 if (path != null) {
 221                         AltosMapRectangle       damage = path.add(gps.lat, gps.lon, state.state);
 222
 223                         if (damage != null)
 224                                 repaint(damage, AltosMapPath.stroke_width);
 225                 }
 226
 227                 last_position = new AltosLatLon(gps.lat, gps.lon);
 228
 229                 maybe_centre(gps.lat, gps.lon);
 230         }
 231
 232         public void centre(AltosLatLon lat_lon) {
 233                 centre = lat_lon;
 234                 set_transform();
 235         }
 236
 237         public void centre(double lat, double lon) {
 238                 centre(new AltosLatLon(lat, lon));
 239         }
 240
 241         public void centre(AltosState state) {
 242                 if (!state.gps.locked && state.gps.nsat < 4)
 243                         return;
 244                 centre(state.gps.lat, state.gps.lon);
 245         }
 246
 247         public void maybe_centre(double lat, double lon) {
 248                 AltosLatLon     lat_lon = new AltosLatLon(lat, lon);
 249                 if (centre == null || (!recent_user_input() && far_from_centre(lat_lon)))
 250                         centre(lat_lon);
 251         }
 252
 253         public void add_mark(double lat, double lon, int state) {
 254                 synchronized(marks) {
 255                         AltosMapMark mark = map_interface.new_mark(lat, lon, state);
 256                         if (mark != null)
 257                                 marks.add(mark);
 258                 }
 259                 repaint();
 260         }
 261
 262         public void clear_marks() {
 263                 synchronized(marks) {
 264                         marks.clear();
 265                 }
 266         }
 267
 268         private void make_tiles() {
 269                 AltosPointInt   upper_left;
 270                 AltosPointInt   lower_right;
 271
 272                 if (load_centre != null) {
 273                         AltosPointInt centre = floor(transform.point(load_centre));
 274
 275                         upper_left = new AltosPointInt(centre.x - load_radius * AltosMap.px_size,
 276                                                                centre.y - load_radius * AltosMap.px_size);
 277                         lower_right = new AltosPointInt(centre.x + load_radius * AltosMap.px_size,
 278                                                                 centre.y + load_radius * AltosMap.px_size);
 279                 } else {
 280                         upper_left = floor(transform.screen_point(new AltosPointInt(0, 0)));
 281                         lower_right = floor(transform.screen_point(new AltosPointInt(width(), height())));
 282                 }
 283                 LinkedList<AltosPointInt> to_remove = new LinkedList<AltosPointInt>();
 284
 285                 for (AltosPointInt point : tiles.keySet()) {
 286                         if (point.x < upper_left.x || lower_right.x < point.x ||
 287                             point.y < upper_left.y || lower_right.y < point.y) {
 288                                 to_remove.add(point);
 289                         }
 290                 }
 291
 292                 for (AltosPointInt point : to_remove)
 293                         tiles.remove(point);
 294
 295                 cache.set_cache_size((width() / AltosMap.px_size + 2) * (height() / AltosMap.px_size + 2));
 296
 297                 for (int y = (int) upper_left.y; y <= lower_right.y; y += AltosMap.px_size) {
 298                         for (int x = (int) upper_left.x; x <= lower_right.x; x += AltosMap.px_size) {
 299                                 AltosPointInt point = new AltosPointInt(x, y);
 300
 301                                 if (!tiles.containsKey(point)) {
 302                                         AltosLatLon     ul = transform.lat_lon(new AltosPointDouble(x, y));
 303                                         AltosLatLon     center = transform.lat_lon(new AltosPointDouble(x + AltosMap.px_size/2, y + AltosMap.px_size/2));
 304                                         AltosMapTile tile = map_interface.new_tile(this, ul, center, zoom, maptype,
 305                                                                                    px_size);
 306                                         tiles.put(point, tile);
 307                                 }
 308                         }
 309                 }
 310         }
 311
 312         public void set_load_params(int new_zoom, int new_type, double lat, double lon, int radius, AltosMapTileListener listener) {
 313                 if (AltosMap.min_zoom <= new_zoom && new_zoom <= AltosMap.max_zoom)
 314                         zoom = new_zoom;
 315                 maptype = new_type;
 316                 load_centre = new AltosLatLon(lat, lon);
 317                 load_radius = radius;
 318                 load_listener = listener;
 319                 centre(lat, lon);
 320                 tiles.clear();
 321                 make_tiles();
 322                 for (AltosMapTile tile : tiles.values()) {
 323                         tile.add_store_listener(this);
 324                         if (tile.store_status() != AltosMapTile.loading)
 325                                 listener.notify_tile(tile, tile.store_status());
 326                 }
 327                 repaint();
 328         }
 329
 330         public String getName() {
 331                 return "Map";
 332         }
 333
 334         public void paint() {
 335                 if (centre != null)
 336                         make_tiles();
 337
 338                 for (AltosMapTile tile : tiles.values())
 339                         tile.paint(transform);
 340
 341                 synchronized(marks) {
 342                         for (AltosMapMark mark : marks)
 343                                 mark.paint(transform);
 344                 }
 345
 346                 if (path != null)
 347                         path.paint(transform);
 348
 349                 if (line != null)
 350                         line.paint(transform);
 351         }
 352
 353         /* AltosMapTileListener methods */
 354         public synchronized void notify_tile(AltosMapTile tile, int status) {
 355                 for (AltosPointInt point : tiles.keySet()) {
 356                         if (tile == tiles.get(point)) {
 357                                 AltosPointInt   screen = transform.screen(point);
 358                                 repaint(screen.x, screen.y, AltosMap.px_size, AltosMap.px_size);
 359                         }
 360                 }
 361         }
 362
 363         /* AltosMapStoreListener methods */
 364         public synchronized void notify_store(AltosMapStore store, int status) {
 365                 if (load_listener != null) {
 366                         for (AltosMapTile tile : tiles.values())
 367                                 if (store.equals(tile.store))
 368                                         load_listener.notify_tile(tile, status);
 369                 }
 370         }
 371
 372         /* UI elements */
 373
 374         AltosPointInt   drag_start;
 375
 376         private void drag(int x, int y) {
 377                 if (drag_start == null)
 378                         return;
 379
 380                 int dx = x - drag_start.x;
 381                 int dy = y - drag_start.y;
 382
 383                 if (transform == null) {
 384                         debug("Transform not set in drag\n");
 385                         return;
 386                 }
 387
 388                 AltosLatLon new_centre = transform.screen_lat_lon(new AltosPointInt(width() / 2 - dx, height() / 2 - dy));
 389                 centre(new_centre);
 390                 drag_start = new AltosPointInt(x, y);
 391         }
 392
 393         private void drag_start(int x, int y) {
 394                 drag_start = new AltosPointInt(x, y);
 395         }
 396
 397         private void line_start(int x, int y) {
 398                 if (line != null) {
 399                         line.pressed(new AltosPointInt(x, y), transform);
 400                         repaint();
 401                 }
 402         }
 403
 404         private void line(int x, int y) {
 405                 if (line != null) {
 406                         line.dragged(new AltosPointInt(x, y), transform);
 407                         repaint();
 408                 }
 409         }
 410
 411         public void touch_start(int x, int y, boolean is_drag) {
 412                 notice_user_input();
 413                 if (is_drag)
 414                         drag_start(x, y);
 415                 else
 416                         line_start(x, y);
 417         }
 418
 419         public void touch_continue(int x, int y, boolean is_drag) {
 420                 notice_user_input();
 421                 if (is_drag)
 422                         drag(x, y);
 423                 else
 424                         line(x, y);
 425         }
 426
 427         public AltosMap(AltosMapInterface map_interface) {
 428                 this.map_interface = map_interface;
 429                 cache = new AltosMapCache(map_interface);
 430                 line = map_interface.new_line();
 431                 path = map_interface.new_path();
 432                 set_zoom_label();
 433         }
 434 }