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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 AltosPointInt floor(AltosPointDouble point) {
 113                 return new AltosPointInt ((int) Math.floor(point.x / AltosMap.px_size) * AltosMap.px_size,
 114                                               (int) Math.floor(point.y / AltosMap.px_size) * AltosMap.px_size);
 115         }
 116
 117         public AltosPointInt ceil(AltosPointDouble point) {
 118                 return new AltosPointInt ((int) Math.ceil(point.x / AltosMap.px_size) * AltosMap.px_size,
 119                                               (int) Math.ceil(point.y / AltosMap.px_size) * AltosMap.px_size);
 120         }
 121
 122         public void notice_user_input() {
 123                 user_input_time = System.currentTimeMillis();
 124         }
 125
 126         public boolean recent_user_input() {
 127                 return (System.currentTimeMillis() - user_input_time) < auto_scroll_delay;
 128         }
 129
 130         public boolean far_from_centre(AltosLatLon lat_lon) {
 131
 132                 if (centre == null || transform == null)
 133                         return true;
 134
 135                 AltosPointDouble        screen = transform.screen(lat_lon);
 136
 137                 int             width = width();
 138                 int             dx = Math.abs ((int) (double) screen.x - width/2);
 139
 140                 if (dx > width / 4)
 141                         return true;
 142
 143                 int             height = height();
 144                 int             dy = Math.abs ((int) (double) screen.y - height/2);
 145
 146                 if (dy > height / 4)
 147                         return true;
 148
 149                 return false;
 150         }
 151
 152         public void set_transform() {
 153                 if (centre != null) {
 154                         transform = new AltosMapTransform(width(), height(), zoom, centre);
 155                         repaint();
 156                 }
 157         }
 158
 159         private void set_zoom_label() {
 160                 map_interface.set_zoom_label(String.format("Zoom %d", get_zoom() - default_zoom));
 161         }
 162
 163
 164         public boolean set_zoom(int zoom) {
 165                 if (AltosMap.min_zoom <= zoom && zoom <= AltosMap.max_zoom && zoom != this.zoom) {
 166                         this.zoom = zoom;
 167                         tiles.clear();
 168                         set_transform();
 169                         set_zoom_label();
 170                         return true;
 171                 }
 172                 return false;
 173         }
 174
 175         public int get_zoom() {
 176                 return zoom;
 177         }
 178
 179         public boolean set_maptype(int maptype) {
 180                 if (maptype != this.maptype) {
 181                         this.maptype = maptype;
 182                         tiles.clear();
 183                         repaint();
 184                         return true;
 185                 }
 186                 return false;
 187         }
 188
 189         public void show(AltosState state, AltosListenerState listener_state) {
 190
 191                 /* If insufficient gps data, nothing to update
 192                  */
 193                 AltosGPS        gps = state.gps;
 194
 195                 if (gps == null)
 196                         return;
 197
 198                 if (!gps.locked && gps.nsat < 4)
 199                         return;
 200
 201                 switch (state.state) {
 202                 case AltosLib.ao_flight_boost:
 203                         if (!have_boost) {
 204                                 add_mark(gps.lat, gps.lon, state.state);
 205                                 have_boost = true;
 206                         }
 207                         break;
 208                 case AltosLib.ao_flight_landed:
 209                         if (!have_landed) {
 210                                 add_mark(gps.lat, gps.lon, state.state);
 211                                 have_landed = true;
 212                         }
 213                         break;
 214                 }
 215
 216                 if (path != null) {
 217                         AltosMapRectangle       damage = path.add(gps.lat, gps.lon, state.state);
 218
 219                         if (damage != null)
 220                                 repaint(damage, AltosMapPath.stroke_width);
 221                 }
 222
 223                 last_position = new AltosLatLon(gps.lat, gps.lon);
 224
 225                 maybe_centre(gps.lat, gps.lon);
 226         }
 227
 228         public void centre(AltosLatLon lat_lon) {
 229                 centre = lat_lon;
 230                 set_transform();
 231         }
 232
 233         public void centre(double lat, double lon) {
 234                 centre(new AltosLatLon(lat, lon));
 235         }
 236
 237         public void centre(AltosState state) {
 238                 if (!state.gps.locked && state.gps.nsat < 4)
 239                         return;
 240                 centre(state.gps.lat, state.gps.lon);
 241         }
 242
 243         public void maybe_centre(double lat, double lon) {
 244                 AltosLatLon     lat_lon = new AltosLatLon(lat, lon);
 245                 if (centre == null || (!recent_user_input() && far_from_centre(lat_lon)))
 246                         centre(lat_lon);
 247         }
 248
 249         public void add_mark(double lat, double lon, int state) {
 250                 synchronized(marks) {
 251                         AltosMapMark mark = map_interface.new_mark(lat, lon, state);
 252                         if (mark != null)
 253                                 marks.add(mark);
 254                 }
 255                 repaint();
 256         }
 257
 258         public void clear_marks() {
 259                 synchronized(marks) {
 260                         marks.clear();
 261                 }
 262         }
 263
 264         private void make_tiles() {
 265                 AltosPointInt   upper_left;
 266                 AltosPointInt   lower_right;
 267
 268                 if (load_centre != null) {
 269                         AltosPointInt centre = floor(transform.point(load_centre));
 270
 271                         upper_left = new AltosPointInt(centre.x - load_radius * AltosMap.px_size,
 272                                                                centre.y - load_radius * AltosMap.px_size);
 273                         lower_right = new AltosPointInt(centre.x + load_radius * AltosMap.px_size,
 274                                                                 centre.y + load_radius * AltosMap.px_size);
 275                 } else {
 276                         upper_left = floor(transform.screen_point(new AltosPointInt(0, 0)));
 277                         lower_right = floor(transform.screen_point(new AltosPointInt(width(), height())));
 278                 }
 279                 LinkedList<AltosPointInt> to_remove = new LinkedList<AltosPointInt>();
 280
 281                 for (AltosPointInt point : tiles.keySet()) {
 282                         if (point.x < upper_left.x || lower_right.x < point.x ||
 283                             point.y < upper_left.y || lower_right.y < point.y) {
 284                                 to_remove.add(point);
 285                         }
 286                 }
 287
 288                 for (AltosPointInt point : to_remove)
 289                         tiles.remove(point);
 290
 291                 cache.set_cache_size((width() / AltosMap.px_size + 2) * (height() / AltosMap.px_size + 2));
 292
 293                 for (int y = (int) upper_left.y; y <= lower_right.y; y += AltosMap.px_size) {
 294                         for (int x = (int) upper_left.x; x <= lower_right.x; x += AltosMap.px_size) {
 295                                 AltosPointInt point = new AltosPointInt(x, y);
 296
 297                                 if (!tiles.containsKey(point)) {
 298                                         AltosLatLon     ul = transform.lat_lon(new AltosPointDouble(x, y));
 299                                         AltosLatLon     center = transform.lat_lon(new AltosPointDouble(x + AltosMap.px_size/2, y + AltosMap.px_size/2));
 300                                         AltosMapTile tile = map_interface.new_tile(this, ul, center, zoom, maptype,
 301                                                                                    px_size);
 302                                         tiles.put(point, tile);
 303                                 }
 304                         }
 305                 }
 306         }
 307
 308         public void set_load_params(int new_zoom, int new_type, double lat, double lon, int radius, AltosMapTileListener listener) {
 309                 if (AltosMap.min_zoom <= new_zoom && new_zoom <= AltosMap.max_zoom)
 310                         zoom = new_zoom;
 311                 maptype = new_type;
 312                 load_centre = new AltosLatLon(lat, lon);
 313                 load_radius = radius;
 314                 load_listener = listener;
 315                 centre(lat, lon);
 316                 tiles.clear();
 317                 make_tiles();
 318                 for (AltosMapTile tile : tiles.values()) {
 319                         tile.add_store_listener(this);
 320                         if (tile.store_status() != AltosMapTile.loading)
 321                                 listener.notify_tile(tile, tile.store_status());
 322                 }
 323                 repaint();
 324         }
 325
 326         public String getName() {
 327                 return "Map";
 328         }
 329
 330         public void paint() {
 331                 if (centre != null)
 332                         make_tiles();
 333
 334                 for (AltosMapTile tile : tiles.values())
 335                         tile.paint(transform);
 336
 337                 synchronized(marks) {
 338                         for (AltosMapMark mark : marks)
 339                                 mark.paint(transform);
 340                 }
 341
 342                 if (path != null)
 343                         path.paint(transform);
 344
 345                 if (line != null)
 346                         line.paint(transform);
 347         }
 348
 349         /* AltosMapTileListener methods */
 350         public synchronized void notify_tile(AltosMapTile tile, int status) {
 351                 for (AltosPointInt point : tiles.keySet()) {
 352                         if (tile == tiles.get(point)) {
 353                                 AltosPointInt   screen = transform.screen(point);
 354                                 repaint(screen.x, screen.y, AltosMap.px_size, AltosMap.px_size);
 355                         }
 356                 }
 357         }
 358
 359         /* AltosMapStoreListener methods */
 360         public synchronized void notify_store(AltosMapStore store, int status) {
 361                 if (load_listener != null) {
 362                         for (AltosMapTile tile : tiles.values())
 363                                 if (store.equals(tile.store))
 364                                         load_listener.notify_tile(tile, status);
 365                 }
 366         }
 367
 368         /* UI elements */
 369
 370         AltosPointInt   drag_start;
 371
 372         private void drag(int x, int y) {
 373                 if (drag_start == null)
 374                         return;
 375
 376                 int dx = x - drag_start.x;
 377                 int dy = y - drag_start.y;
 378
 379                 AltosLatLon new_centre = transform.screen_lat_lon(new AltosPointInt(width() / 2 - dx, height() / 2 - dy));
 380                 centre(new_centre);
 381                 drag_start = new AltosPointInt(x, y);
 382         }
 383
 384         private void drag_start(int x, int y) {
 385                 drag_start = new AltosPointInt(x, y);
 386         }
 387
 388         private void line_start(int x, int y) {
 389                 if (line != null) {
 390                         line.pressed(new AltosPointInt(x, y), transform);
 391                         repaint();
 392                 }
 393         }
 394
 395         private void line(int x, int y) {
 396                 if (line != null) {
 397                         line.dragged(new AltosPointInt(x, y), transform);
 398                         repaint();
 399                 }
 400         }
 401
 402         public void touch_start(int x, int y, boolean is_drag) {
 403                 notice_user_input();
 404                 if (is_drag)
 405                         drag_start(x, y);
 406                 else
 407                         line_start(x, y);
 408         }
 409
 410         public void touch_continue(int x, int y, boolean is_drag) {
 411                 notice_user_input();
 412                 if (is_drag)
 413                         drag(x, y);
 414                 else
 415                         line(x, y);
 416         }
 417
 418         public AltosMap(AltosMapInterface map_interface) {
 419                 this.map_interface = map_interface;
 420                 cache = new AltosMapCache(map_interface);
 421                 line = map_interface.new_line();
 422                 path = map_interface.new_path();
 423                 set_zoom_label();
 424         }
 425 }