git.gag.com Git - fw/altos/blob - altosuilib/AltosUIMapLine.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.altosuilib_3;
  19
  20 import java.awt.*;
  21 import java.awt.event.*;
  22 import javax.swing.*;
  23 import java.io.*;
  24 import java.lang.Math;
  25 import java.awt.geom.*;
  26 import java.util.*;
  27 import java.util.concurrent.*;
  28 import org.altusmetrum.altoslib_5.*;
  29
  30 public class AltosUIMapLine {
  31         AltosUILatLon   start, end;
  32
  33         private Font    font = null;
  34         static public int stroke_width = 6;
  35
  36         public void set_font(Font font) {
  37                 this.font = font;
  38         }
  39
  40         private AltosUILatLon lat_lon(MouseEvent e, AltosUIMapTransform t) {
  41                 return t.screen_lat_lon(e.getPoint());
  42         }
  43
  44         public void dragged(MouseEvent e, AltosUIMapTransform t) {
  45                 end = lat_lon(e, t);
  46         }
  47
  48         public void pressed(MouseEvent e, AltosUIMapTransform t) {
  49                 start = lat_lon(e, t);
  50                 end = null;
  51         }
  52
  53         private String line_dist() {
  54                 String  format;
  55                 AltosGreatCircle        g = new AltosGreatCircle(start.lat, start.lon,
  56                                                                  end.lat, end.lon);
  57                 double  distance = g.distance;
  58
  59                 if (AltosConvert.imperial_units) {
  60                         distance = AltosConvert.meters_to_feet(distance);
  61                         if (distance < 10000) {
  62                                 format = "%4.0fft";
  63                         } else {
  64                                 distance /= 5280;
  65                                 if (distance < 10)
  66                                         format = "%5.3fmi";
  67                                 else if (distance < 100)
  68                                         format = "%5.2fmi";
  69                                 else if (distance < 1000)
  70                                         format = "%5.1fmi";
  71                                 else
  72                                         format = "%5.0fmi";
  73                         }
  74                 } else {
  75                         if (distance < 10000) {
  76                                 format = "%4.0fm";
  77                         } else {
  78                                 distance /= 1000;
  79                                 if (distance < 100)
  80                                         format = "%5.2fkm";
  81                                 else if (distance < 1000)
  82                                         format = "%5.1fkm";
  83                                 else
  84                                         format = "%5.0fkm";
  85                         }
  86                 }
  87                 return String.format(format, distance);
  88         }
  89
  90         public void paint(Graphics2D g, AltosUIMapTransform t) {
  91
  92                 if (start == null || end == null)
  93                         return;
  94
  95                 g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
  96
  97                 Line2D.Double line = new Line2D.Double(t.screen(start),
  98                                                        t.screen(end));
  99
 100                 g.setColor(Color.WHITE);
 101                 g.setStroke(new BasicStroke(stroke_width+4, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
 102                 g.draw(line);
 103
 104                 g.setColor(Color.BLUE);
 105                 g.setStroke(new BasicStroke(stroke_width, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
 106                 g.draw(line);
 107
 108                 String  message = line_dist();
 109                 Rectangle2D     bounds;
 110                 bounds = font.getStringBounds(message, g.getFontRenderContext());
 111
 112                 float x = (float) line.x1;
 113                 float y = (float) line.y1 + (float) bounds.getHeight() / 2.0f;
 114
 115                 if (line.x1 < line.x2) {
 116                         x -= (float) bounds.getWidth() + 2.0f;
 117                 } else {
 118                         x += 2.0f;
 119                 }
 120
 121                 g.setFont(font);
 122                 g.setColor(Color.WHITE);
 123                 for (int dy = -2; dy <= 2; dy += 2)
 124                         for (int dx = -2; dx <= 2; dx += 2)
 125                                 g.drawString(message, x + dx, y + dy);
 126                 g.setColor(Color.BLUE);
 127                 g.drawString(message, x, y);
 128         }
 129 }