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+/*
+ * Copyright © 2010 Anthony Towns <aj@erisian.com.au>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+package org.altusmetrum.altosuilib_2;
+
+import java.awt.*;
+import javax.swing.*;
+import java.io.*;
+import java.lang.Math;
+import java.awt.geom.Point2D;
+import java.util.concurrent.*;
+import org.altusmetrum.altoslib_4.*;
+
+public class AltosSiteMap extends JScrollPane implements AltosFlightDisplay {
+ // preferred vertical step in a tile in naut. miles
+ // will actually choose a step size between x and 2x, where this
+ // is 1.5x
+ static final double tile_size_nmi = 0.75;
+
+ static final int px_size = 512;
+
+ static final int MAX_TILE_DELTA = 100;
+
+ 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;
+
+ int radius; /* half width/height of tiles to load */
+
+ 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);
+ }
+ */
+
+ ConcurrentHashMap<Point,AltosSiteMapTile> mapTiles = new ConcurrentHashMap<Point,AltosSiteMapTile>();
+ Point2D.Double centre;
+
+ private Point2D.Double tileCoordOffset(Point p) {
+ return new Point2D.Double(centre.x - p.x*px_size,
+ centre.y - p.y * px_size);
+ }
+
+ private Point tileOffset(Point2D.Double p) {
+ return new Point((int)Math.floor((centre.x+p.x)/px_size),
+ (int)Math.floor((centre.y+p.y)/px_size));
+ }
+
+ 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*4/3/60.0, 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
+ }
+
+ public void set_font() {
+ // nothing
+ }
+
+ private void loadMap(final AltosSiteMapTile tile,
+ final File pngfile, String pngurl)
+ {
+ boolean loaded = AltosSiteMapCache.fetchMap(pngfile, pngurl);
+ if (loaded) {
+ SwingUtilities.invokeLater(new Runnable() {
+ public void run() {
+ tile.loadMap(pngfile);
+ }
+ });
+ } else {
+ System.out.printf("# Failed to fetch file %s\n", pngfile);
+ System.out.printf(" wget -O '%s' '%s'\n", pngfile, pngurl);
+ }
+ }
+
+
+ class AltosSiteMapPrefetch {
+ int x;
+ int y;
+ int result;
+ File pngfile;
+ String pngurl;
+ }
+
+ public AltosSiteMapPrefetch prefetchMap(int x, int y) {
+ AltosSiteMapPrefetch prefetch = new AltosSiteMapPrefetch();
+ LatLng map_latlng = latlng(
+ -centre.x + x*px_size + px_size/2,
+ -centre.y + y*px_size + px_size/2);
+ prefetch.pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom);
+ prefetch.pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom);
+ if (prefetch.pngfile.exists()) {
+ prefetch.result = 1;
+ } else if (AltosSiteMapCache.fetchMap(prefetch.pngfile, prefetch.pngurl)) {
+ prefetch.result = 0;
+ } else {
+ prefetch.result = -1;
+ }
+ return prefetch;
+ }
+
+ public static void prefetchMaps(double lat, double lng) {
+ int w = AltosSiteMapPreload.width;
+ int h = AltosSiteMapPreload.height;
+ AltosSiteMap asm = new AltosSiteMap(true);
+ asm.centre = 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++) {
+ AltosSiteMapPrefetch prefetch = asm.prefetchMap(x, y);
+ switch (prefetch.result) {
+ case 1:
+ System.out.printf("Already have %s\n", prefetch.pngfile);
+ break;
+ case 0:
+ System.out.printf("Fetched map %s\n", prefetch.pngfile);
+ break;
+ case -1:
+ System.out.printf("# Failed to fetch file %s\n", prefetch.pngfile);
+ System.out.printf(" wget -O '%s' ''\n",
+ prefetch.pngfile, prefetch.pngurl);
+ break;
+ }
+ }
+ }
+ }
+
+ public String initMap(Point offset) {
+ AltosSiteMapTile tile = mapTiles.get(offset);
+ Point2D.Double coord = tileCoordOffset(offset);
+
+ LatLng map_latlng = latlng(px_size/2-coord.x, px_size/2-coord.y);
+
+ File pngfile = MapFile(map_latlng.lat, map_latlng.lng, zoom);
+ String pngurl = MapURL(map_latlng.lat, map_latlng.lng, zoom);
+ loadMap(tile, pngfile, pngurl);
+ return pngfile.toString();
+ }
+
+ public void initAndFinishMapAsync (final AltosSiteMapTile tile, final Point offset) {
+ Thread thread = new Thread() {
+ public void run() {
+ initMap(offset);
+ finishTileLater(tile, offset);
+ }
+ };
+ thread.start();
+ }
+
+ public void setBaseLocation(double lat, double lng) {
+ for (Point k : mapTiles.keySet()) {
+ AltosSiteMapTile tile = mapTiles.get(k);
+ tile.clearMap();
+ }
+
+ centre = getBaseLocation(lat, lng);
+ scrollRocketToVisible(pt(lat,lng));
+ }
+
+ private void initMaps(double lat, double lng) {
+ setBaseLocation(lat, lng);
+
+ Thread thread = new Thread() {
+ public void run() {
+ for (Point k : mapTiles.keySet())
+ initMap(k);
+ }
+ };
+ thread.start();
+ }
+
+ private static File MapFile(double lat, double lng, int zoom) {
+ char chlat = lat < 0 ? 'S' : 'N';
+ char chlng = lng < 0 ? 'W' : 'E';
+ if (lat < 0) lat = -lat;
+ if (lng < 0) lng = -lng;
+ return new File(AltosUIPreferences.mapdir(),
+ String.format("map-%c%.6f,%c%.6f-%d.png",
+ chlat, lat, chlng, lng, zoom));
+ }
+
+ private static String MapURL(double lat, double lng, int zoom) {
+ 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;
+ Point2D.Double last_pt = null;
+ int last_state = -1;
+
+ public void show(double lat, double lon) {
+ System.out.printf ("show %g %g\n", lat, lon);
+ return;
+// initMaps(lat, lon);
+// scrollRocketToVisible(pt(lat, lon));
+ }
+ public void show(final AltosState state, final AltosListenerState listener_state) {
+ // if insufficient gps data, nothing to update
+ AltosGPS gps = state.gps;
+
+ if (gps == null)
+ return;
+
+ if (!gps.locked && gps.nsat < 4)
+ return;
+
+ if (!initialised) {
+ if (state.pad_lat != AltosLib.MISSING && state.pad_lon != AltosLib.MISSING) {
+ initMaps(state.pad_lat, state.pad_lon);
+ initialised = true;
+ } else if (gps.lat != AltosLib.MISSING && gps.lon != AltosLib.MISSING) {
+ initMaps(gps.lat, gps.lon);
+ initialised = true;
+ } else {
+ return;
+ }
+ }
+
+ final Point2D.Double pt = pt(gps.lat, gps.lon);
+ if (last_pt == pt && last_state == state.state)
+ return;
+
+ if (last_pt == null) {
+ last_pt = pt;
+ }
+ boolean in_any = false;
+ for (Point offset : mapTiles.keySet()) {
+ AltosSiteMapTile tile = mapTiles.get(offset);
+ Point2D.Double ref, lref;
+ ref = translatePoint(pt, tileCoordOffset(offset));
+ lref = translatePoint(last_pt, tileCoordOffset(offset));
+ tile.show(state, listener_state, lref, ref);
+ if (0 <= ref.x && ref.x < px_size)
+ if (0 <= ref.y && ref.y < px_size)
+ in_any = true;
+ }
+
+ Point offset = tileOffset(pt);
+ if (!in_any) {
+ Point2D.Double ref, lref;
+ ref = translatePoint(pt, tileCoordOffset(offset));
+ lref = translatePoint(last_pt, tileCoordOffset(offset));
+
+ AltosSiteMapTile tile = createTile(offset);
+ tile.show(state, listener_state, lref, ref);
+ initAndFinishMapAsync(tile, offset);
+ }
+
+ scrollRocketToVisible(pt);
+
+ if (offset != tileOffset(last_pt)) {
+ ensureTilesAround(offset);
+ }
+
+ last_pt = pt;
+ last_state = state.state;
+ }
+
+ public void centre(Point2D.Double pt) {
+ Rectangle r = comp.getVisibleRect();
+ Point2D.Double copt = translatePoint(pt, tileCoordOffset(topleft));
+ int dx = (int)copt.x - r.width/2 - r.x;
+ int dy = (int)copt.y - r.height/2 - r.y;
+ r.x += dx;
+ r.y += dy;
+ comp.scrollRectToVisible(r);
+ }
+
+ public void centre(AltosState state) {
+ if (!state.gps.locked && state.gps.nsat < 4)
+ return;
+ centre(pt(state.gps.lat, state.gps.lon));
+ }
+
+ public void draw_circle(double lat, double lon) {
+ final Point2D.Double pt = pt(lat, lon);
+
+ for (Point offset : mapTiles.keySet()) {
+ AltosSiteMapTile tile = mapTiles.get(offset);
+ Point2D.Double ref = translatePoint(pt, tileCoordOffset(offset));
+ tile.set_boost(ref);
+ }
+ }
+
+ private AltosSiteMapTile createTile(Point offset) {
+ AltosSiteMapTile tile = new AltosSiteMapTile(px_size);
+ mapTiles.put(offset, tile);
+ return tile;
+ }
+ private void finishTileLater(final AltosSiteMapTile tile,
+ final Point offset)
+ {
+ SwingUtilities.invokeLater( new Runnable() {
+ public void run() {
+ addTileAt(tile, offset);
+ }
+ } );
+ }
+
+ private void ensureTilesAround(Point base_offset) {
+ for (int x = -radius; x <= radius; x++) {
+ for (int y = -radius; y <= radius; y++) {
+ Point offset = new Point(base_offset.x + x, base_offset.y + y);
+ if (mapTiles.containsKey(offset))
+ continue;
+ AltosSiteMapTile tile = createTile(offset);
+ initAndFinishMapAsync(tile, offset);
+ }
+ }
+ }
+
+ private Point topleft = new Point(0,0);
+ private void scrollRocketToVisible(Point2D.Double pt) {
+ Rectangle r = comp.getVisibleRect();
+ Point2D.Double copt = translatePoint(pt, tileCoordOffset(topleft));
+ int dx = (int)copt.x - r.width/2 - r.x;
+ int dy = (int)copt.y - r.height/2 - r.y;
+ if (Math.abs(dx) > r.width/4 || Math.abs(dy) > r.height/4) {
+ r.x += dx;
+ r.y += dy;
+ comp.scrollRectToVisible(r);
+ }
+ }
+
+ private void addTileAt(AltosSiteMapTile tile, Point offset) {
+ if (Math.abs(offset.x) >= MAX_TILE_DELTA ||
+ Math.abs(offset.y) >= MAX_TILE_DELTA)
+ {
+ System.out.printf("Rocket too far away from pad (tile %d,%d)\n",
+ offset.x, offset.y);
+ return;
+ }
+
+ boolean review = false;
+ Rectangle r = comp.getVisibleRect();
+ if (offset.x < topleft.x) {
+ r.x += (topleft.x - offset.x) * px_size;
+ topleft.x = offset.x;
+ review = true;
+ }
+ if (offset.y < topleft.y) {
+ r.y += (topleft.y - offset.y) * px_size;
+ topleft.y = offset.y;
+ review = true;
+ }
+ 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);
+
+ c.gridx = offset.x + MAX_TILE_DELTA;
+ c.gridy = offset.y + MAX_TILE_DELTA;
+ layout.setConstraints(tile, c);
+
+ comp.add(tile);
+ if (review) {
+ comp.scrollRectToVisible(r);
+ }
+ }
+
+ private AltosSiteMap(boolean knowWhatYouAreDoing) {
+ if (!knowWhatYouAreDoing) {
+ throw new RuntimeException("Arggh.");
+ }
+ }
+
+ JComponent comp = new JComponent() { };
+ private GridBagLayout layout = new GridBagLayout();
+
+ public AltosSiteMap(int in_radius) {
+ radius = in_radius;
+
+ GrabNDrag scroller = new GrabNDrag(comp);
+
+ comp.setLayout(layout);
+
+ for (int x = -radius; x <= radius; x++) {
+ for (int y = -radius; y <= radius; y++) {
+ Point offset = new Point(x, y);
+ AltosSiteMapTile t = createTile(offset);
+ addTileAt(t, offset);
+ }
+ }
+ setViewportView(comp);
+ setPreferredSize(new Dimension(500,500));
+ }
+
+ public AltosSiteMap() {
+ this(1);
+ }
+}
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