Switch from GPLv2 to GPLv2+
[fw/altos] / 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; either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful, but
10  * WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12  * General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License along
15  * with this program; if not, write to the Free Software Foundation, Inc.,
16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
17  */
18
19 package org.altusmetrum.altoslib_11;
20
21 import java.io.*;
22 import java.lang.Math;
23 import java.util.*;
24 import java.util.concurrent.*;
25
26 public abstract class AltosMapLine {
27         public AltosLatLon      start, end;
28
29         static public int stroke_width = 6;
30
31         public abstract void paint(AltosMapTransform t);
32
33         private AltosLatLon lat_lon(AltosPointInt pt, AltosMapTransform t) {
34                 return t.screen_lat_lon(pt);
35         }
36
37         public void dragged(AltosPointInt pt, AltosMapTransform t) {
38                 end = lat_lon(pt, t);
39         }
40
41         public void pressed(AltosPointInt pt, AltosMapTransform t) {
42                 start = lat_lon(pt, t);
43                 end = null;
44         }
45
46         public String line_dist() {
47                 String  format;
48                 AltosGreatCircle        g = new AltosGreatCircle(start.lat, start.lon,
49                                                                  end.lat, end.lon);
50                 double  distance = g.distance;
51
52                 if (AltosConvert.imperial_units) {
53                         distance = AltosConvert.meters_to_feet(distance);
54                         if (distance < 1000) {
55                                 format = "%4.0fft";
56                         } else {
57                                 distance /= 5280;
58                                 if (distance < 10)
59                                         format = "%5.3fmi";
60                                 else if (distance < 100)
61                                         format = "%5.2fmi";
62                                 else if (distance < 1000)
63                                         format = "%5.1fmi";
64                                 else
65                                         format = "%5.0fmi";
66                         }
67                 } else {
68                         if (distance < 1000) {
69                                 format = "%4.0fm";
70                         } else {
71                                 distance /= 1000;
72                                 if (distance < 100)
73                                         format = "%5.2fkm";
74                                 else if (distance < 1000)
75                                         format = "%5.1fkm";
76                                 else
77                                         format = "%5.0fkm";
78                         }
79                 }
80                 return String.format(format, distance);
81         }
82 }