2 * Copyright © 2010 Anthony Towns <aj@erisian.com.au>
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.
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.
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.
21 import java.awt.image.*;
22 import java.awt.event.*;
24 import javax.swing.event.MouseInputAdapter;
25 import javax.imageio.ImageIO;
26 import javax.swing.table.*;
30 import java.util.prefs.*;
31 import java.lang.Math;
32 import java.awt.geom.Point2D;
33 import java.awt.geom.Line2D;
35 public class AltosSiteMap extends JScrollPane implements AltosFlightDisplay {
36 // max vertical step in a tile in naut. miles
37 static final double tile_size_nmi = 1.0;
39 static final int px_size = 512;
41 private static Point2D.Double translatePoint(Point2D.Double p,
44 return new Point2D.Double(p.x + d.x, p.y + d.y);
48 public double lat, lng;
49 public LatLng(double lat, double lng) {
56 // http://maps.gstatic.com/intl/en_us/mapfiles/api-3/2/10/main.js
57 // search for fromLatLngToPoint and fromPointToLatLng
58 private static Point2D.Double pt(LatLng latlng, int zoom) {
59 double scale_x = 256/360.0 * Math.pow(2, zoom);
60 double scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom);
61 return pt(latlng, scale_x, scale_y);
64 private static Point2D.Double pt(LatLng latlng,
65 double scale_x, double scale_y)
67 Point2D.Double res = new Point2D.Double();
70 res.x = latlng.lng * scale_x;
72 e = Math.sin(Math.toRadians(latlng.lat));
73 e = Math.max(e,-(1-1.0E-15));
74 e = Math.min(e, 1-1.0E-15 );
76 res.y = 0.5*Math.log((1+e)/(1-e))*-scale_y;
80 static private LatLng latlng(Point2D.Double pt,
81 double scale_x, double scale_y)
87 rads = 2 * Math.atan(Math.exp(-pt.y/scale_y));
88 lat = Math.toDegrees(rads - Math.PI/2);
90 return new LatLng(lat,lng);
94 double scale_x, scale_y;
96 private Point2D.Double pt(double lat, double lng) {
97 return pt(new LatLng(lat, lng), scale_x, scale_y);
100 private LatLng latlng(double x, double y) {
101 return latlng(new Point2D.Double(x,y), scale_x, scale_y);
103 private LatLng latlng(Point2D.Double pt) {
104 return latlng(pt, scale_x, scale_y);
107 AltosSiteMapTile [] mapTiles = new AltosSiteMapTile[9];
108 Point2D.Double [] tileOffset = new Point2D.Double[9];
110 private Point2D.Double getBaseLocation(double lat, double lng) {
111 Point2D.Double locn, north_step;
114 // stupid loop structure to please Java's control flow analysis
117 scale_x = 256/360.0 * Math.pow(2, zoom);
118 scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom);
120 north_step = pt(lat+tile_size_nmi/60.0, lng);
121 if (locn.y - north_step.y > px_size)
124 locn.x = -px_size * Math.floor(locn.x/px_size);
125 locn.y = -px_size * Math.floor(locn.y/px_size);
129 public void reset() {
133 private void bgLoadMap(final int i,
134 final File pngfile, final String pngurl)
136 Thread thread = new Thread() {
139 res = AltosSiteMapCache.fetchAndLoadMap(pngfile, pngurl);
141 mapTiles[i].loadMap(res);
143 System.out.printf("# Failed to fetch file %s\n", pngfile);
144 System.out.printf(" wget -O '%s' ''\n", pngfile, pngurl);
151 public static void prefetchMaps(double lat, double lng, int w, int h) {
152 AltosPreferences.init(null);
154 AltosSiteMap asm = new AltosSiteMap(true);
155 Point2D.Double c = asm.getBaseLocation(lat, lng);
156 Point2D.Double p = new Point2D.Double();
158 int dx = -w/2, dy = -h/2;
159 for (int y = dy; y < h+dy; y++) {
160 for (int x = dx; x < w+dx; x++) {
161 LatLng map_latlng = asm.latlng(
162 -c.x + x*px_size + px_size/2,
163 -c.y + y*px_size + px_size/2);
164 File pngfile = asm.MapFile(map_latlng.lat, map_latlng.lng);
165 String pngurl = asm.MapURL(map_latlng.lat, map_latlng.lng);
166 if (pngfile.exists()) {
167 System.out.printf("Already have %s\n", pngfile);
168 } else if (AltosSiteMapCache.fetchMap(pngfile, pngurl)) {
169 System.out.printf("Fetched map %s\n", pngfile);
171 System.out.printf("# Failed to fetch file %s\n", pngfile);
172 System.out.printf(" wget -O '%s' ''\n", pngfile, pngurl);
178 private void initMaps(double lat, double lng) {
179 Point2D.Double c = getBaseLocation(lat, lng);
180 Point2D.Double p = new Point2D.Double();
182 for (int i = 0; i < 9; i++) {
183 int x = i%3 - 1, y = i/3 - 1;
185 tileOffset[i] = new Point2D.Double(
186 c.x - x*px_size, p.y = c.y - y*px_size);
187 LatLng map_latlng = latlng(
188 -tileOffset[i].x+px_size/2,
189 -tileOffset[i].y+px_size/2);
191 File pngfile = MapFile(map_latlng.lat, map_latlng.lng);
192 String pngurl = MapURL(map_latlng.lat, map_latlng.lng);
193 bgLoadMap(i, pngfile, pngurl);
197 private File MapFile(double lat, double lng) {
198 char chlat = lat < 0 ? 'S' : 'N';
199 char chlng = lng < 0 ? 'E' : 'W';
200 if (lat < 0) lat = -lat;
201 if (lng < 0) lng = -lng;
202 return new File(AltosPreferences.logdir(),
203 String.format("map-%c%.6f,%c%.6f-%d.png",
204 chlat, lat, chlng, lng, zoom));
207 private String MapURL(double lat, double lng) {
208 return String.format("http://maps.google.com/maps/api/staticmap?center=%.6f,%.6f&zoom=%d&size=%dx%d&sensor=false&maptype=hybrid&format=png32", lat, lng, zoom, px_size, px_size);
211 boolean initialised = false;
212 public void show(AltosState state, int crc_errors) {
213 // if insufficient gps data, nothing to update
214 if (state.gps == null || !state.gps.locked) {
215 if (state.pad_lat == 0 && state.pad_lon == 0)
222 initMaps(state.pad_lat, state.pad_lon);
226 Point2D.Double pt = pt(state.gps.lat, state.gps.lon);
227 for (int x = 0; x < mapTiles.length; x++) {
228 mapTiles[x].show(state, crc_errors,
229 translatePoint(pt, tileOffset[x]));
233 private AltosSiteMap(boolean knowWhatYouAreDoing) {
234 if (!knowWhatYouAreDoing) {
235 throw new RuntimeException("Arggh.");
239 public AltosSiteMap() {
240 JComponent comp = new JComponent() {
241 GrabNDrag scroller = new GrabNDrag(this);
243 addMouseMotionListener(scroller);
244 addMouseListener(scroller);
245 setAutoscrolls(true);
249 GridBagLayout layout = new GridBagLayout();
250 comp.setLayout(layout);
252 GridBagConstraints c = new GridBagConstraints();
253 c.anchor = GridBagConstraints.CENTER;
254 c.fill = GridBagConstraints.BOTH;
256 // put some space between the map tiles, debugging only
257 // c.insets = new Insets(5, 5, 5, 5);
258 for (int x = 0; x < 9; x++) {
261 mapTiles[x] = new AltosSiteMapTile(px_size);
262 layout.setConstraints(mapTiles[x], c);
263 comp.add(mapTiles[x]);
265 setViewportView(comp);
266 setPreferredSize(new Dimension(500,200));