git.gag.com Git - fw/altos/blob - telegps/TeleGPSDisplayThread.java

   1 /*
   2  * Copyright © 2010 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.telegps;
  19
  20 import java.awt.*;
  21 import javax.swing.*;
  22 import java.io.*;
  23 import java.text.*;
  24 import org.altusmetrum.altoslib_5.*;
  25 import org.altusmetrum.altosuilib_3.*;
  26
  27 public class TeleGPSDisplayThread extends Thread {
  28
  29         Frame                   parent;
  30         IdleThread              idle_thread;
  31         AltosVoice              voice;
  32         AltosFlightReader       reader;
  33         AltosState              old_state, state;
  34         AltosListenerState      listener_state;
  35         AltosFlightDisplay      display;
  36
  37         synchronized void show_safely() {
  38                 final AltosState my_state = state;
  39                 final AltosListenerState my_listener_state = listener_state;
  40                 Runnable r = new Runnable() {
  41                                 public void run() {
  42                                         try {
  43                                                 display.show(my_state, my_listener_state);
  44                                         } catch (Exception ex) {
  45                                         }
  46                                 }
  47                         };
  48                 SwingUtilities.invokeLater(r);
  49         }
  50
  51         void reading_error_internal() {
  52                 JOptionPane.showMessageDialog(parent,
  53                                               String.format("Error reading from \"%s\"", reader.name),
  54                                               "Telemetry Read Error",
  55                                               JOptionPane.ERROR_MESSAGE);
  56         }
  57
  58         void reading_error_safely() {
  59                 Runnable r = new Runnable() {
  60                                 public void run() {
  61                                         try {
  62                                                 reading_error_internal();
  63                                         } catch (Exception ex) {
  64                                         }
  65                                 }
  66                         };
  67                 SwingUtilities.invokeLater(r);
  68         }
  69
  70         class IdleThread extends Thread {
  71
  72                 boolean started;
  73                 int     report_interval;
  74                 long    report_time;
  75
  76                 public synchronized void report(boolean last) {
  77                         if (state == null)
  78                                 return;
  79
  80                         if (state.height() != AltosLib.MISSING) {
  81                                 if (state.from_pad != null) {
  82                                         voice.speak("Height %s, bearing %s %d, elevation %d, range %s, .\n",
  83                                                     AltosConvert.height.say(state.gps_height()),
  84                                                     state.from_pad.bearing_words(
  85                                                             AltosGreatCircle.BEARING_VOICE),
  86                                                     (int) (state.from_pad.bearing + 0.5),
  87                                                     (int) (state.elevation + 0.5),
  88                                                     AltosConvert.distance.say(state.range));
  89                                 } else {
  90                                         voice.speak("Height %s.\n",
  91                                                     AltosConvert.height.say(state.height()));
  92                                 }
  93                         }
  94                 }
  95
  96                 long now () {
  97                         return System.currentTimeMillis();
  98                 }
  99
 100                 void set_report_time() {
 101                         report_time = now() + report_interval;
 102                 }
 103
 104                 public void run () {
 105                         try {
 106                                 for (;;) {
 107                                         if (reader.has_monitor_battery()) {
 108                                                 listener_state.battery = reader.monitor_battery();
 109                                                 show_safely();
 110                                         }
 111                                         set_report_time();
 112                                         for (;;) {
 113                                                 voice.drain();
 114                                                 synchronized (this) {
 115                                                         long    sleep_time = report_time - now();
 116                                                         if (sleep_time <= 0)
 117                                                                 break;
 118                                                         wait(sleep_time);
 119                                                 }
 120                                         }
 121
 122                                         report(false);
 123                                 }
 124                         } catch (InterruptedException ie) {
 125                                 try {
 126                                         voice.drain();
 127                                 } catch (InterruptedException iie) { }
 128                         }
 129                 }
 130
 131                 public synchronized void notice(boolean spoken) {
 132                         if (old_state != null && old_state.state != state.state) {
 133                                 report_time = now();
 134                                 this.notify();
 135                         } else if (spoken)
 136                                 set_report_time();
 137                 }
 138
 139                 public IdleThread() {
 140                         report_interval = 10000;
 141                 }
 142         }
 143
 144         synchronized boolean tell() {
 145                 boolean ret = false;
 146                 if (old_state == null || old_state.gps_ready != state.gps_ready) {
 147                         if (state.gps_ready) {
 148                                 voice.speak("GPS ready");
 149                                 ret = true;
 150                         }
 151                         else if (old_state != null) {
 152                                 voice.speak("GPS lost");
 153                                 ret = true;
 154                         }
 155                 }
 156                 old_state = state;
 157                 return ret;
 158         }
 159
 160         public void run() {
 161                 boolean         interrupted = false;
 162                 boolean         told;
 163
 164                 idle_thread = new IdleThread();
 165                 idle_thread.start();
 166
 167                 try {
 168                         for (;;) {
 169                                 try {
 170                                         state = reader.read();
 171                                         if (state == null)
 172                                                 break;
 173                                         reader.update(state);
 174                                         show_safely();
 175                                         told = tell();
 176                                         idle_thread.notice(told);
 177                                 } catch (ParseException pp) {
 178                                         System.out.printf("Parse error: %d \"%s\"\n", pp.getErrorOffset(), pp.getMessage());
 179                                 } catch (AltosCRCException ce) {
 180                                         ++listener_state.crc_errors;
 181                                         show_safely();
 182                                 }
 183                         }
 184                 } catch (InterruptedException ee) {
 185                         interrupted = true;
 186                 } catch (IOException ie) {
 187                         reading_error_safely();
 188                 } finally {
 189                         if (!interrupted)
 190                                 idle_thread.report(true);
 191                         reader.close(interrupted);
 192                         idle_thread.interrupt();
 193                         try {
 194                                 idle_thread.join();
 195                         } catch (InterruptedException ie) {}
 196                 }
 197         }
 198
 199         public TeleGPSDisplayThread(Frame in_parent, AltosVoice in_voice, AltosFlightDisplay in_display, AltosFlightReader in_reader) {
 200                 listener_state = new AltosListenerState();
 201                 parent = in_parent;
 202                 voice = in_voice;
 203                 display = in_display;
 204                 reader = in_reader;
 205                 display.reset();
 206         }
 207 }