X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=ao-tools%2Faltosui%2FAltosSiteMap.java;h=0375128e1bfec7b014dcca63fea1b0f0395ede93;hp=df1cc246a9948b071e814115471264e49be90ee0;hb=a08b2a6363c194195db92029743f6612676373ce;hpb=081fbd5715f9d3d81d98e149fb95d40447c07a79

diff --git a/ao-tools/altosui/AltosSiteMap.java b/ao-tools/altosui/AltosSiteMap.java
index df1cc246..0375128e 100644
--- a/ao-tools/altosui/AltosSiteMap.java
+++ b/ao-tools/altosui/AltosSiteMap.java
@@ -21,6 +21,7 @@ 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.*;
@@ -31,33 +32,300 @@ import java.lang.Math;
 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 {
+	// 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<Point,AltosSiteMapTile> mapTiles = new HashMap<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
+	}
+
+	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));
+	}
+}