git.gag.com Git - fw/altos/blob - altoslib/AltosMapLine.java

   1 /*
   2  * Copyright © 2014 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 package org.altusmetrum.altoslib_7;
  19
  20 import java.io.*;
  21 import java.lang.Math;
  22 import java.util.*;
  23 import java.util.concurrent.*;
  24
  25 public abstract class AltosMapLine {
  26         public AltosLatLon      start, end;
  27
  28         static public int stroke_width = 6;
  29
  30         public abstract void paint(AltosMapTransform t);
  31
  32         private AltosLatLon lat_lon(AltosPointInt pt, AltosMapTransform t) {
  33                 return t.screen_lat_lon(pt);
  34         }
  35
  36         public void dragged(AltosPointInt pt, AltosMapTransform t) {
  37                 end = lat_lon(pt, t);
  38         }
  39
  40         public void pressed(AltosPointInt pt, AltosMapTransform t) {
  41                 start = lat_lon(pt, t);
  42                 end = null;
  43         }
  44
  45         public String line_dist() {
  46                 String  format;
  47                 AltosGreatCircle        g = new AltosGreatCircle(start.lat, start.lon,
  48                                                                  end.lat, end.lon);
  49                 double  distance = g.distance;
  50
  51                 if (AltosConvert.imperial_units) {
  52                         distance = AltosConvert.meters_to_feet(distance);
  53                         if (distance < 10000) {
  54                                 format = "%4.0fft";
  55                         } else {
  56                                 distance /= 5280;
  57                                 if (distance < 10)
  58                                         format = "%5.3fmi";
  59                                 else if (distance < 100)
  60                                         format = "%5.2fmi";
  61                                 else if (distance < 1000)
  62                                         format = "%5.1fmi";
  63                                 else
  64                                         format = "%5.0fmi";
  65                         }
  66                 } else {
  67                         if (distance < 10000) {
  68                                 format = "%4.0fm";
  69                         } else {
  70                                 distance /= 1000;
  71                                 if (distance < 100)
  72                                         format = "%5.2fkm";
  73                                 else if (distance < 1000)
  74                                         format = "%5.1fkm";
  75                                 else
  76                                         format = "%5.0fkm";
  77                         }
  78                 }
  79                 return String.format(format, distance);
  80         }
  81 }