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