+ 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;
+ }
+
+ 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, crc_errors, lref, ref);
+ initMap(tile, offset);
+ finishTileLater(tile, offset);
+ }
+
+ scrollRocketToVisible(pt);
+
+ if (offset != tileOffset(last_pt)) {
+ ensureTilesAround(offset);
+ }
+
+ last_pt = pt;
+ last_state = state.state;
+ }
+
+ 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 = -1; x <= 1; x++) {
+ for (int y = -1; y <= 1; y++) {
+ Point offset = new Point(base_offset.x + x, base_offset.y + y);
+ if (mapTiles.containsKey(offset))
+ continue;
+ AltosSiteMapTile tile = createTile(offset);
+ initMap(tile, offset);
+ finishTileLater(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() {
+ GrabNDrag scroller = new GrabNDrag(comp);
+
+ comp.setLayout(layout);
+
+ for (int x = -1; x <= 1; x++) {
+ for (int y = -1; y <= 1; y++) {
+ Point offset = new Point(x, y);
+ AltosSiteMapTile t = createTile(offset);
+ addTileAt(t, offset);
+ }
+ }
+ setViewportView(comp);
+ setPreferredSize(new Dimension(500,200));
+ }
+}