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