altoslib: Create display-independent map support code

This takes the swing-specific map code and creates a generic version.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 355 insertions, 0 deletions

diff --git a/altoslib/AltosMap.java b/altoslib/AltosMap.java
new file mode 100644
index 00000000..b42f9f85
--- /dev/null
+++ b/altoslib/AltosMap.java
@@ -0,0 +1,355 @@
+/*
+ * 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.altoslib_6;
+
+import java.io.*;
+import java.lang.*;
+import java.util.*;
+import java.util.concurrent.*;
+
+public class AltosMap implements AltosFlightDisplay, AltosMapTileListener, AltosMapStoreListener {
+
+	static final int px_size = 512;
+
+	static final int maptype_hybrid = 0;
+	static final int maptype_roadmap = 1;
+	static final int maptype_satellite = 2;
+	static final int maptype_terrain = 3;
+	static final int maptype_default = maptype_hybrid;
+
+	static final int default_zoom = 15;
+	static final int min_zoom = 3;
+	static final int max_zoom = 21;
+
+	static final String[] maptype_names = {
+		"hybrid",
+		"roadmap",
+		"satellite",
+		"terrain"
+	};
+
+	public static final String[] maptype_labels = {
+		"Hybrid",
+		"Roadmap",
+		"Satellite",
+		"Terrain"
+	};
+
+	AltosMapInterface	map_interface;
+
+	AltosMapCache		cache;
+
+	LinkedList<AltosMapMark> marks = new LinkedList<AltosMapMark>();
+
+	LinkedList<AltosMapZoomListener> zoom_listeners = new LinkedList<AltosMapZoomListener>();
+
+	public void add_zoom_listener(AltosMapZoomListener listener) {
+		if (!zoom_listeners.contains(listener))
+			zoom_listeners.add(listener);
+	}
+
+	public void remove_zoom_listener(AltosMapZoomListener listener) {
+		zoom_listeners.remove(listener);
+	}
+
+	boolean		have_boost = false;
+	boolean		have_landed = false;
+
+	ConcurrentHashMap<AltosPointInt,AltosMapTile> tiles = new ConcurrentHashMap<AltosPointInt,AltosMapTile>();
+	int		load_radius;
+	AltosLatLon	load_centre = null;
+	AltosMapTileListener	load_listener;
+
+	int 		zoom = AltosMap.default_zoom;
+	int		maptype = AltosMap.maptype_default;
+
+	long		user_input_time;
+
+	/* Milliseconds to wait after user action before auto-scrolling
+	 */
+	static final long auto_scroll_delay = 20 * 1000;
+
+	AltosMapTransform	transform;
+	AltosLatLon		centre;
+
+	public void reset() {
+		// nothing
+	}
+
+	/* MapInterface wrapping functions */
+	public void set_units() {
+		map_interface.set_units();
+	}
+
+	public void repaint(AltosMapRectangle damage, int pad) {
+		map_interface.repaint(damage, pad);
+	}
+
+	public void repaint(double x, double y, double w, double h) {
+		map_interface.repaint(x, y, w, h);
+	}
+
+	public void repaint() {
+		map_interface.repaint();
+	}
+
+	public int width() {
+		return map_interface.width();
+	}
+
+	public int height() {
+		return map_interface.height();
+	}
+
+	public AltosPointInt floor(AltosPointDouble point) {
+		return new AltosPointInt ((int) Math.floor(point.x / AltosMap.px_size) * AltosMap.px_size,
+					      (int) Math.floor(point.y / AltosMap.px_size) * AltosMap.px_size);
+	}
+
+	public AltosPointInt ceil(AltosPointDouble point) {
+		return new AltosPointInt ((int) Math.ceil(point.x / AltosMap.px_size) * AltosMap.px_size,
+					      (int) Math.ceil(point.y / AltosMap.px_size) * AltosMap.px_size);
+	}
+
+	public void notice_user_input() {
+		user_input_time = System.currentTimeMillis();
+	}
+
+	public boolean recent_user_input() {
+		return (System.currentTimeMillis() - user_input_time) < auto_scroll_delay;
+	}
+
+	public boolean far_from_centre(AltosLatLon lat_lon) {
+
+		if (centre == null || transform == null)
+			return true;
+
+		AltosPointDouble	screen = transform.screen(lat_lon);
+
+		int		width = width();
+		int		dx = Math.abs ((int) (double) screen.x - width/2);
+
+		if (dx > width / 4)
+			return true;
+
+		int		height = height();
+		int		dy = Math.abs ((int) (double) screen.y - height/2);
+
+		if (dy > height / 4)
+			return true;
+
+		return false;
+	}
+
+	public void font_size_changed(int font_size) {
+		map_interface.line.font_size_changed(font_size);
+		for (AltosMapTile tile : tiles.values())
+			tile.font_size_changed(font_size);
+		repaint();
+	}
+
+	public void units_changed(boolean imperial_units) {
+	}
+
+	private void set_transform() {
+		transform = new AltosMapTransform(width(), height(), zoom, centre);
+		repaint();
+	}
+
+	public boolean set_zoom(int zoom) {
+		if (AltosMap.min_zoom <= zoom && zoom <= AltosMap.max_zoom && zoom != this.zoom) {
+			this.zoom = zoom;
+			tiles.clear();
+			set_transform();
+
+			for (AltosMapZoomListener listener : zoom_listeners)
+				listener.zoom_changed(this.zoom);
+
+			return true;
+		}
+		return false;
+	}
+
+	public int get_zoom() {
+		return zoom;
+	}
+
+	public boolean set_maptype(int maptype) {
+		if (maptype != this.maptype) {
+			this.maptype = maptype;
+			tiles.clear();
+			repaint();
+			return true;
+		}
+		return false;
+	}
+
+	public void show(AltosState state, 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;
+
+		AltosMapRectangle	damage = map_interface.path.add(gps.lat, gps.lon, state.state);
+
+		switch (state.state) {
+		case AltosLib.ao_flight_boost:
+			if (!have_boost) {
+				add_mark(gps.lat, gps.lon, state.state);
+				have_boost = true;
+			}
+			break;
+		case AltosLib.ao_flight_landed:
+			if (!have_landed) {
+				add_mark(gps.lat, gps.lon, state.state);
+				have_landed = true;
+			}
+			break;
+		}
+
+		if (damage != null)
+			repaint(damage, AltosMapPath.stroke_width);
+		maybe_centre(gps.lat, gps.lon);
+	}
+
+	public void centre(AltosLatLon lat_lon) {
+		centre = lat_lon;
+		set_transform();
+	}
+
+	public void centre(double lat, double lon) {
+		centre(new AltosLatLon(lat, lon));
+	}
+
+	public void centre(AltosState state) {
+		if (!state.gps.locked && state.gps.nsat < 4)
+			return;
+		centre(state.gps.lat, state.gps.lon);
+	}
+
+	public void maybe_centre(double lat, double lon) {
+		AltosLatLon	lat_lon = new AltosLatLon(lat, lon);
+		if (centre == null || (!recent_user_input() && far_from_centre(lat_lon)))
+			centre(lat_lon);
+	}
+
+	public void add_mark(double lat, double lon, int state) {
+		synchronized(marks) {
+			marks.add(map_interface.new_mark(lat, lon, state));
+		}
+		repaint();
+	}
+
+	public void clear_marks() {
+		synchronized(marks) {
+			marks.clear();
+		}
+	}
+
+	private void make_tiles() {
+		AltosPointInt	upper_left;
+		AltosPointInt	lower_right;
+
+		if (load_centre != null) {
+			AltosPointInt centre = floor(transform.point(load_centre));
+
+			upper_left = new AltosPointInt(centre.x - load_radius * AltosMap.px_size,
+							       centre.y - load_radius * AltosMap.px_size);
+			lower_right = new AltosPointInt(centre.x + load_radius * AltosMap.px_size,
+								centre.y + load_radius * AltosMap.px_size);
+		} else {
+			upper_left = floor(transform.screen_point(new AltosPointDouble(0.0, 0.0)));
+			lower_right = floor(transform.screen_point(new AltosPointDouble(width(), height())));
+		}
+		LinkedList<AltosPointInt> to_remove = new LinkedList<AltosPointInt>();
+
+		for (AltosPointInt point : tiles.keySet()) {
+			if (point.x < upper_left.x || lower_right.x < point.x ||
+			    point.y < upper_left.y || lower_right.y < point.y) {
+				to_remove.add(point);
+			}
+		}
+
+		for (AltosPointInt point : to_remove)
+			tiles.remove(point);
+
+		cache.set_cache_size((width() / AltosMap.px_size + 2) * (height() / AltosMap.px_size + 2));
+		for (int y = (int) upper_left.y; y <= lower_right.y; y += AltosMap.px_size) {
+			for (int x = (int) upper_left.x; x <= lower_right.x; x += AltosMap.px_size) {
+				AltosPointInt point = new AltosPointInt(x, y);
+
+				if (!tiles.containsKey(point)) {
+					AltosLatLon	ul = transform.lat_lon(new AltosPointDouble(x, y));
+					AltosLatLon	center = transform.lat_lon(new AltosPointDouble(x + AltosMap.px_size/2, y + AltosMap.px_size/2));
+					AltosMapTile tile = new AltosMapTile(this, ul, center, zoom, maptype,
+									     AltosMap.px_size);
+					tiles.put(point, tile);
+				}
+			}
+		}
+	}
+
+	public void set_load_params(double lat, double lon, int radius, AltosMapTileListener listener) {
+		load_centre = new AltosLatLon(lat, lon);
+		load_radius = radius;
+		load_listener = listener;
+		centre(lat, lon);
+		make_tiles();
+		for (AltosMapTile tile : tiles.values()) {
+			tile.add_store_listener(this);
+			if (tile.store_status() != AltosMapTile.loading)
+				listener.notify_tile(tile, tile.store_status());
+		}
+		repaint();
+	}
+
+	public String getName() {
+		return "Map";
+	}
+
+	/* AltosMapTileListener methods */
+	public synchronized void notify_tile(AltosMapTile tile, int status) {
+		for (AltosPointInt point : tiles.keySet()) {
+			if (tile == tiles.get(point)) {
+				AltosPointInt	screen = transform.screen(point);
+				repaint(screen.x, screen.y, AltosMap.px_size, AltosMap.px_size);
+			}
+		}
+	}
+
+	/* AltosMapStoreListener methods */
+	public synchronized void notify_store(AltosMapStore store, int status) {
+		if (load_listener != null) {
+			for (AltosMapTile tile : tiles.values())
+				if (store.equals(tile.store))
+					load_listener.notify_tile(tile, status);
+		}
+	}
+
+	public AltosMap(AltosMapInterface map_interface) {
+		this.map_interface = map_interface;
+		cache = new AltosMapCache(map_interface);
+		centre(0, 0);
+	}
+}