import java.awt.image.*;
import java.awt.event.*;
import javax.swing.*;
+import javax.swing.event.MouseInputAdapter;
import javax.imageio.ImageIO;
import javax.swing.table.*;
import java.io.*;
import java.awt.geom.Point2D;
import java.awt.geom.Line2D;
-public class AltosSiteMap extends JComponent implements AltosFlightDisplay {
- public void reset() {
- // nothing
- }
- public void show(AltosState state, int crc_errors) {
- for (int x = 0; x < mapTiles.length; x++) {
- mapTiles[x].show(state, crc_errors);
- }
- }
-
- AltosSiteMapTile [] mapTiles = new AltosSiteMapTile[9];
-
- public AltosSiteMap() {
-
- GridBagLayout layout = new GridBagLayout();
- setLayout(layout);
-
- GridBagConstraints c = new GridBagConstraints();
- c.anchor = GridBagConstraints.CENTER;
- c.fill = GridBagConstraints.BOTH;
-
- for (int x = 0; x < 9; x++) {
- c.gridx = x % 3; c.gridy = x / 3;
- mapTiles[x] = new AltosSiteMapTile((x%3)-1, (x/3)-1);
- layout.setConstraints(mapTiles[x], c);
- add(mapTiles[x]);
- }
- }
+public class AltosSiteMap extends JScrollPane implements AltosFlightDisplay {
+ // max vertical step in a tile in naut. miles
+ static final double tile_size_nmi = 2.0;
+
+ static final int px_size = 512;
+
+ private static Point2D.Double translatePoint(Point2D.Double p,
+ Point2D.Double d)
+ {
+ return new Point2D.Double(p.x + d.x, p.y + d.y);
+ }
+
+ static class LatLng {
+ public double lat, lng;
+ public LatLng(double lat, double lng) {
+ this.lat = lat;
+ this.lng = lng;
+ }
+ }
+
+ // based on google js
+ // http://maps.gstatic.com/intl/en_us/mapfiles/api-3/2/10/main.js
+ // search for fromLatLngToPoint and fromPointToLatLng
+ private static Point2D.Double pt(LatLng latlng, int zoom) {
+ double scale_x = 256/360.0 * Math.pow(2, zoom);
+ double scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom);
+ return pt(latlng, scale_x, scale_y);
+ }
+
+ private static Point2D.Double pt(LatLng latlng,
+ double scale_x, double scale_y)
+ {
+ Point2D.Double res = new Point2D.Double();
+ double e;
+
+ res.x = latlng.lng * scale_x;
+
+ e = Math.sin(Math.toRadians(latlng.lat));
+ e = Math.max(e,-(1-1.0E-15));
+ e = Math.min(e, 1-1.0E-15 );
+
+ res.y = 0.5*Math.log((1+e)/(1-e))*-scale_y;
+ return res;
+ }
+
+ static private LatLng latlng(Point2D.Double pt,
+ double scale_x, double scale_y)
+ {
+ double lat, lng;
+ double rads;
+
+ lng = pt.x/scale_x;
+ rads = 2 * Math.atan(Math.exp(-pt.y/scale_y));
+ lat = Math.toDegrees(rads - Math.PI/2);
+
+ return new LatLng(lat,lng);
+ }
+
+ int zoom;
+ double scale_x, scale_y;
+
+ private Point2D.Double pt(double lat, double lng) {
+ return pt(new LatLng(lat, lng), scale_x, scale_y);
+ }
+
+ private LatLng latlng(double x, double y) {
+ return latlng(new Point2D.Double(x,y), scale_x, scale_y);
+ }
+ private LatLng latlng(Point2D.Double pt) {
+ return latlng(pt, scale_x, scale_y);
+ }
+
+ AltosSiteMapTile [] mapTiles = new AltosSiteMapTile[9];
+ Point2D.Double [] tileOffset = new Point2D.Double[9];
+
+ private Point2D.Double getBaseLocation(double lat, double lng) {
+ Point2D.Double locn, north_step;
+
+ zoom = 2;
+ // stupid loop structure to please Java's control flow analysis
+ do {
+ zoom++;
+ scale_x = 256/360.0 * Math.pow(2, zoom);
+ scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom);
+ locn = pt(lat, lng);
+ north_step = pt(lat+tile_size_nmi/60.0, lng);
+ if (locn.y - north_step.y > px_size)
+ break;
+ } while (zoom < 22);
+ locn.x = -px_size * Math.floor(locn.x/px_size);
+ locn.y = -px_size * Math.floor(locn.y/px_size);
+ return locn;
+ }
+
+ public void reset() {
+ // nothing
+ }
+
+ private void bgLoadMap(final int i,
+ final File pngfile, final String pngurl)
+ {
+ Thread thread = new Thread() {
+ public void run() {
+ ImageIcon res;
+ res = AltosSiteMapCache.fetchAndLoadMap(pngfile, pngurl);
+ if (res != null) {
+ mapTiles[i].loadMap(res);
+ } else {
+ System.out.printf("# Failed to fetch file %s\n", pngfile);
+ System.out.printf(" wget -O '%s' ''\n", pngfile, pngurl);
+ }
+ }
+ };
+ thread.start();
+ }
+
+ public static void prefetchMaps(double lat, double lng, int w, int h) {
+ AltosPreferences.init(null);
+
+ AltosSiteMap asm = new AltosSiteMap(true);
+ Point2D.Double c = asm.getBaseLocation(lat, lng);
+ Point2D.Double p = new Point2D.Double();
+ Point2D.Double p2;
+ int dx = -w/2, dy = -h/2;
+ for (int y = dy; y < h+dy; y++) {
+ for (int x = dx; x < w+dx; x++) {
+ LatLng map_latlng = asm.latlng(
+ -c.x + x*px_size + px_size/2,
+ -c.y + y*px_size + px_size/2);
+ File pngfile = asm.MapFile(map_latlng.lat, map_latlng.lng);
+ String pngurl = asm.MapURL(map_latlng.lat, map_latlng.lng);
+ if (pngfile.exists()) {
+ System.out.printf("Already have %s\n", pngfile);
+ } else if (AltosSiteMapCache.fetchMap(pngfile, pngurl)) {
+ System.out.printf("Fetched map %s\n", pngfile);
+ } else {
+ System.out.printf("# Failed to fetch file %s\n", pngfile);
+ System.out.printf(" wget -O '%s' ''\n", pngfile, pngurl);
+ }
+ }
+ }
+ }
+
+ private void initMaps(double lat, double lng) {
+ Point2D.Double c = getBaseLocation(lat, lng);
+ Point2D.Double p = new Point2D.Double();
+
+ for (int i = 0; i < 9; i++) {
+ int x = i%3 - 1, y = i/3 - 1;
+
+ tileOffset[i] = new Point2D.Double(
+ c.x - x*px_size, p.y = c.y - y*px_size);
+ LatLng map_latlng = latlng(
+ -tileOffset[i].x+px_size/2,
+ -tileOffset[i].y+px_size/2);
+
+ File pngfile = MapFile(map_latlng.lat, map_latlng.lng);
+ String pngurl = MapURL(map_latlng.lat, map_latlng.lng);
+ bgLoadMap(i, pngfile, pngurl);
+ }
+ }
+
+ private File MapFile(double lat, double lng) {
+ char chlat = lat < 0 ? 'S' : 'N';
+ char chlng = lng < 0 ? 'E' : 'W';
+ if (lat < 0) lat = -lat;
+ if (lng < 0) lng = -lng;
+ return new File(AltosPreferences.logdir(),
+ String.format("map-%c%.6f,%c%.6f-%d.png",
+ chlat, lat, chlng, lng, zoom));
+ }
+
+ private String MapURL(double lat, double lng) {
+ 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);
+ }
+
+ boolean initialised = false;
+ public void show(AltosState state, int crc_errors) {
+ // if insufficient gps data, nothing to update
+ if (!state.gps.locked) {
+ if (state.pad_lat == 0 && state.pad_lon == 0)
+ return;
+ if (state.gps.nsat < 4)
+ return;
+ }
+
+ if (!initialised) {
+ initMaps(state.pad_lat, state.pad_lon);
+ initialised = true;
+ }
+
+ Point2D.Double pt = pt(state.gps.lat, state.gps.lon);
+ for (int x = 0; x < mapTiles.length; x++) {
+ mapTiles[x].show(state, crc_errors,
+ translatePoint(pt, tileOffset[x]));
+ }
+ }
+
+ private AltosSiteMap(boolean knowWhatYouAreDoing) {
+ if (!knowWhatYouAreDoing) {
+ throw new RuntimeException("Arggh.");
+ }
+ }
+
+ public AltosSiteMap() {
+ JComponent comp = new JComponent() {
+ GrabNDrag scroller = new GrabNDrag(this);
+ {
+ addMouseMotionListener(scroller);
+ addMouseListener(scroller);
+ setAutoscrolls(true);
+ }
+ };
+
+ GridBagLayout layout = new GridBagLayout();
+ comp.setLayout(layout);
+
+ GridBagConstraints c = new GridBagConstraints();
+ c.anchor = GridBagConstraints.CENTER;
+ c.fill = GridBagConstraints.BOTH;
+
+ // put some space between the map tiles, debugging only
+ // c.insets = new Insets(5, 5, 5, 5);
+ for (int x = 0; x < 9; x++) {
+ c.gridx = x % 3;
+ c.gridy = x / 3;
+ mapTiles[x] = new AltosSiteMapTile(px_size);
+ layout.setConstraints(mapTiles[x], c);
+ comp.add(mapTiles[x]);
+ }
+ setViewportView(comp);
+ setPreferredSize(new Dimension(500,200));
+ }
}
projects / fw / altos / blobdiff