altosuilib: Rewrite map GUI bits
[fw/altos] / altosuilib / AltosUIMapTile.java
diff --git a/altosuilib/AltosUIMapTile.java b/altosuilib/AltosUIMapTile.java
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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 java.awt.image.*;
+import javax.swing.*;
+import javax.imageio.*;
+import java.awt.geom.*;
+import java.io.*;
+import java.util.*;
+import java.awt.RenderingHints.*;
+import org.altusmetrum.altoslib_4.*;
+
+public class AltosUIMapTile {
+       AltosUIMapTileListener  listener;
+       AltosUILatLon   upper_left, center;
+       int             px_size;
+       int             zoom;
+       int             maptype;
+       AltosUIMapStore store;
+       int             status;
+
+       private File map_file() {
+               double lat = center.lat;
+               double lon = center.lon;
+               char chlat = lat < 0 ? 'S' : 'N';
+               char chlon = lon < 0 ? 'W' : 'E';
+
+               if (lat < 0) lat = -lat;
+               if (lon < 0) lon = -lon;
+               String maptype_string = String.format("%s-", AltosUIMap.maptype_names[maptype]);
+               String format_string;
+               if (maptype == AltosUIMap.maptype_hybrid || maptype == AltosUIMap.maptype_satellite || maptype == AltosUIMap.maptype_terrain)
+                       format_string = "jpg";
+               else
+                       format_string = "png";
+               return new File(AltosUIPreferences.mapdir(),
+                               String.format("map-%c%.6f,%c%.6f-%s%d.%s",
+                                             chlat, lat, chlon, lon, maptype_string, zoom, format_string));
+       }
+
+       private String map_url() {
+               String format_string;
+               if (maptype == AltosUIMap.maptype_hybrid || maptype == AltosUIMap.maptype_satellite || maptype == AltosUIMap.maptype_terrain)
+                       format_string = "jpg";
+               else
+                       format_string = "png32";
+
+               if (AltosUIVersion.has_google_maps_api_key())
+                       return String.format("http://maps.google.com/maps/api/staticmap?center=%.6f,%.6f&zoom=%d&size=%dx%d&sensor=false&maptype=%s&format=%s&key=%s",
+                                            center.lat, center.lon, zoom, px_size, px_size, AltosUIMap.maptype_names[maptype], format_string, AltosUIVersion.google_maps_api_key);
+               else
+                       return String.format("http://maps.google.com/maps/api/staticmap?center=%.6f,%.6f&zoom=%d&size=%dx%d&sensor=false&maptype=%s&format=%s",
+                                            center.lat, center.lon, zoom, px_size, px_size, AltosUIMap.maptype_names[maptype], format_string);
+       }
+       private Font    font = null;
+
+       public void set_font(Font font) {
+               this.font = font;
+       }
+
+       int     painting_serial;
+       int     painted_serial;
+
+       Image   image;
+
+       public void paint_graphics(Graphics2D g2d, AltosUIMapTransform t, int serial) {
+               if (serial < painted_serial)
+                       return;
+
+               Point2D.Double  point_double = t.screen(upper_left);
+               Point           point = new Point((int) (point_double.x + 0.5),
+                                                 (int) (point_double.y + 0.5));
+
+               painted_serial = serial;
+
+               if (!g2d.hitClip(point.x, point.y, px_size, px_size))
+                       return;
+
+               if (image != null) {
+                       g2d.drawImage(image, point.x, point.y, null);
+                       image = null;
+               } else {
+                       g2d.setColor(Color.GRAY);
+                       g2d.fillRect(point.x, point.y, px_size, px_size);
+
+                       if (t.has_location()) {
+                               String  message = null;
+                               switch (status) {
+                               case AltosUIMapCache.loading:
+                                       message = "Loading...";
+                                       break;
+                               case AltosUIMapCache.bad_request:
+                                       message = "Internal error";
+                                       break;
+                               case AltosUIMapCache.failed:
+                                       message = "Network error, check connection";
+                                       break;
+                               case AltosUIMapCache.forbidden:
+                                       message = "Too many requests, try later";
+                                       break;
+                               }
+                               if (message != null && font != null) {
+                                       g2d.setFont(font);
+                                       g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
+                                       Rectangle2D bounds = font.getStringBounds(message, g2d.getFontRenderContext());
+
+                                       float x = px_size / 2.0f;
+                                       float y = px_size / 2.0f;
+                                       x = x - (float) bounds.getWidth() / 2.0f;
+                                       y = y + (float) bounds.getHeight() / 2.0f;
+                                       g2d.setColor(Color.BLACK);
+                                       g2d.drawString(message, (float) point_double.x + x, (float) point_double.y + y);
+                               }
+                       }
+               }
+       }
+
+       public void set_status(int status) {
+               this.status = status;
+               listener.notify_tile(this, status);
+       }
+
+       public void notify_image(Image image) {
+               listener.notify_tile(this, status);
+       }
+
+       public void paint(Graphics g, AltosUIMapTransform t) {
+               Graphics2D              g2d = (Graphics2D) g;
+               boolean                 queued = false;
+
+               Point2D.Double  point = t.screen(upper_left);
+
+               if (!g.hitClip((int) (point.x + 0.5), (int) (point.y + 0.5), px_size, px_size))
+                       return;
+
+               ++painting_serial;
+
+               if (image == null && t.has_location())
+                       image = AltosUIMapCache.get(this, store, px_size, px_size);
+
+               paint_graphics(g2d, t, painting_serial);
+       }
+
+       public int store_status() {
+               return store.status();
+       }
+
+       public void add_store_listener(AltosUIMapStoreListener listener) {
+               store.add_listener(listener);
+       }
+
+       public void remove_store_listener(AltosUIMapStoreListener listener) {
+               store.remove_listener(listener);
+       }
+
+       public AltosUIMapTile(AltosUIMapTileListener listener, AltosUILatLon upper_left, AltosUILatLon center, int zoom, int maptype, int px_size, Font font) {
+               this.listener = listener;
+               this.upper_left = upper_left;
+
+               while (center.lon < -180.0)
+                       center.lon += 360.0;
+               while (center.lon > 180.0)
+                       center.lon -= 360.0;
+
+               this.center = center;
+               this.zoom = zoom;
+               this.maptype = maptype;
+               this.px_size = px_size;
+               this.font = font;
+               status = AltosUIMapCache.loading;
+               store = AltosUIMapStore.get(map_url(), map_file());
+       }
+}