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; 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.telegps;
  20
  21 import java.awt.*;
  22 import javax.swing.*;
  23 import java.io.*;
  24 import java.text.*;
  25 import org.altusmetrum.altoslib_13.*;
  26 import org.altusmetrum.altosuilib_13.*;
  27
  28 public class TeleGPSDisplayThread extends Thread {
  29
  30         Frame                   parent;
  31         IdleThread              idle_thread;
  32         AltosVoice              voice;
  33         AltosFlightReader       reader;
  34         AltosState              state;
  35         int                     old_state = AltosLib.ao_flight_invalid;
  36         boolean                 old_gps_ready = false;
  37         AltosListenerState      listener_state;
  38         AltosFlightDisplay      display;
  39
  40         synchronized void show_safely() {
  41                 final AltosState my_state = state;
  42                 final AltosListenerState my_listener_state = listener_state;
  43                 Runnable r = new Runnable() {
  44                                 public void run() {
  45                                         try {
  46                                                 display.show(my_state, my_listener_state);
  47                                         } catch (Exception ex) {
  48                                         }
  49                                 }
  50                         };
  51                 SwingUtilities.invokeLater(r);
  52         }
  53
  54         void reading_error_internal() {
  55                 JOptionPane.showMessageDialog(parent,
  56                                               String.format("Error reading from \"%s\"", reader.name),
  57                                               "Telemetry Read Error",
  58                                               JOptionPane.ERROR_MESSAGE);
  59         }
  60
  61         void reading_error_safely() {
  62                 Runnable r = new Runnable() {
  63                                 public void run() {
  64                                         try {
  65                                                 reading_error_internal();
  66                                         } catch (Exception ex) {
  67                                         }
  68                                 }
  69                         };
  70                 SwingUtilities.invokeLater(r);
  71         }
  72
  73         class IdleThread extends Thread {
  74
  75                 boolean started;
  76                 int     report_interval;
  77                 long    report_time;
  78
  79                 public synchronized void report(boolean last) {
  80                         if (state == null)
  81                                 return;
  82
  83                         if (state.height() != AltosLib.MISSING) {
  84                                 if (state.from_pad != null) {
  85                                         voice.speak("Height %s, bearing %s %d, elevation %d, range %s, .\n",
  86                                                     AltosConvert.height.say(state.gps_height()),
  87                                                     state.from_pad.bearing_words(
  88                                                             AltosGreatCircle.BEARING_VOICE),
  89                                                     (int) (state.from_pad.bearing + 0.5),
  90                                                     (int) (state.elevation + 0.5),
  91                                                     AltosConvert.distance.say(state.range));
  92                                 } else {
  93                                         voice.speak("Height %s.\n",
  94                                                     AltosConvert.height.say(state.height()));
  95                                 }
  96                         }
  97                 }
  98
  99                 long now () {
 100                         return System.currentTimeMillis();
 101                 }
 102
 103                 void set_report_time() {
 104                         report_time = now() + report_interval;
 105                 }
 106
 107                 public void run () {
 108                         try {
 109                                 for (;;) {
 110                                         if (reader.has_monitor_battery()) {
 111                                                 listener_state.battery = reader.monitor_battery();
 112                                                 show_safely();
 113                                         }
 114                                         set_report_time();
 115                                         for (;;) {
 116                                                 voice.drain();
 117                                                 synchronized (this) {
 118                                                         long    sleep_time = report_time - now();
 119                                                         if (sleep_time <= 0)
 120                                                                 break;
 121                                                         wait(sleep_time);
 122                                                 }
 123                                         }
 124
 125                                         report(false);
 126                                 }
 127                         } catch (InterruptedException ie) {
 128                                 try {
 129                                         voice.drain();
 130                                 } catch (InterruptedException iie) { }
 131                         }
 132                 }
 133
 134                 public synchronized void notice(boolean spoken) {
 135                         if (old_state != state.state()) {
 136                                 report_time = now();
 137                                 this.notify();
 138                         } else if (spoken)
 139                                 set_report_time();
 140                         old_state = state.state();
 141                 }
 142
 143                 public IdleThread() {
 144                         report_interval = 10000;
 145                 }
 146         }
 147
 148         synchronized boolean tell() {
 149                 boolean ret = false;
 150                 if (old_gps_ready != state.gps_ready) {
 151                         if (state.gps_ready) {
 152                                 voice.speak("GPS ready");
 153                                 ret = true;
 154                         }
 155                         else if (old_gps_ready) {
 156                                 voice.speak("GPS lost");
 157                                 ret = true;
 158                         }
 159                         old_gps_ready = state.gps_ready;
 160                 }
 161                 return ret;
 162         }
 163
 164         public void run() {
 165                 boolean         interrupted = false;
 166                 boolean         told;
 167
 168                 idle_thread = new IdleThread();
 169                 idle_thread.start();
 170
 171                 try {
 172                         for (;;) {
 173                                 try {
 174                                         state = reader.read();
 175                                         if (state == null) {
 176                                                 listener_state.running = false;
 177                                                 break;
 178                                         }
 179                                         show_safely();
 180                                         told = tell();
 181                                         idle_thread.notice(told);
 182                                 } catch (ParseException pp) {
 183                                         System.out.printf("Parse error: %d \"%s\"\n", pp.getErrorOffset(), pp.getMessage());
 184                                 } catch (AltosCRCException ce) {
 185                                         ++listener_state.crc_errors;
 186                                         show_safely();
 187                                 }
 188                         }
 189                 } catch (InterruptedException ee) {
 190                         interrupted = true;
 191                 } catch (IOException ie) {
 192                         reading_error_safely();
 193                 } finally {
 194                         if (!interrupted)
 195                                 idle_thread.report(true);
 196                         reader.close(interrupted);
 197                         idle_thread.interrupt();
 198                         try {
 199                                 idle_thread.join();
 200                         } catch (InterruptedException ie) {}
 201                 }
 202         }
 203
 204         public TeleGPSDisplayThread(Frame in_parent, AltosVoice in_voice, AltosFlightDisplay in_display, AltosFlightReader in_reader) {
 205                 listener_state = new AltosListenerState();
 206                 parent = in_parent;
 207                 voice = in_voice;
 208                 display = in_display;
 209                 reader = in_reader;
 210                 display.reset();
 211         }
 212 }