/* * Copyright © 2010 Anthony Towns * * 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 altosui; import java.awt.*; 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.util.*; import java.text.*; import java.util.prefs.*; import java.lang.Math; import java.awt.geom.Point2D; import java.awt.geom.Line2D; 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; 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); } HashMap mapTiles = new HashMap(); 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 } private void bgLoadMap(final AltosSiteMapTile tile, final File pngfile, final String pngurl) { //System.out.printf("Loading/fetching map %s\n", pngfile); Thread thread = new Thread() { public void run() { ImageIcon res; res = AltosSiteMapCache.fetchAndLoadMap(pngfile, pngurl); if (res != null) { tile.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); 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++) { LatLng map_latlng = asm.latlng( -asm.centre.x + x*px_size + px_size/2, -asm.centre.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 initMap(AltosSiteMapTile tile, Point 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); String pngurl = MapURL(map_latlng.lat, map_latlng.lng); bgLoadMap(tile, pngfile, pngurl); } private void initMaps(double lat, double lng) { centre = getBaseLocation(lat, lng); for (Point k : mapTiles.keySet()) { initMap(mapTiles.get(k), k); } } 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; Point2D.Double last_pt = null; int last_state = -1; public void show(final AltosState state, final int crc_errors) { // if insufficient gps data, nothing to update if (state.gps == null) return; if (state.pad_lat == 0 && state.pad_lon == 0) return; if (!state.gps.locked) { if (state.gps.nsat < 4) return; } if (!initialised) { initMaps(state.pad_lat, state.pad_lon); initialised = true; } final Point2D.Double pt = pt(state.gps.lat, state.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, crc_errors, lref, ref); if (0 <= ref.x && ref.x < px_size) if (0 <= ref.y && ref.y < px_size) in_any = true; } if (!in_any) { final AltosSiteMapTile tile = new AltosSiteMapTile(px_size); final Point offset = tileOffset(pt); mapTiles.put(offset, tile); Point2D.Double ref, lref; ref = translatePoint(pt, tileCoordOffset(offset)); lref = translatePoint(last_pt, tileCoordOffset(offset)); tile.show(state, crc_errors, lref, ref); initMap(tile, offset); SwingUtilities.invokeLater( new Runnable() { public void run() { addTileAt(tile, offset); setViewportView(comp); } } ); } last_pt = pt; last_state = state.state; } private void addTileAt(AltosSiteMapTile tile, Point offset) { 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 + 100; c.gridy = offset.y + 100; layout.setConstraints(tile, c); comp.add(tile); } private AltosSiteMap(boolean knowWhatYouAreDoing) { if (!knowWhatYouAreDoing) { throw new RuntimeException("Arggh."); } } JComponent comp; private GridBagLayout layout; public AltosSiteMap() { comp = new JComponent() { GrabNDrag scroller = new GrabNDrag(this); { addMouseMotionListener(scroller); addMouseListener(scroller); setAutoscrolls(true); } }; layout = new GridBagLayout(); comp.setLayout(layout); for (int x = -1; x <= 1; x++) { for (int y = -1; y <= 1; y++) { AltosSiteMapTile t = new AltosSiteMapTile(px_size); Point offset = new Point(x, y); mapTiles.put(offset, t); addTileAt(t, offset); } } setViewportView(comp); setPreferredSize(new Dimension(500,200)); } }