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_11.*;
  26 import org.altusmetrum.altosuilib_11.*;
  27
  28 public class TeleGPSDisplayThread extends Thread {
  29
  30         Frame                   parent;
  31         IdleThread              idle_thread;
  32         AltosVoice              voice;
  33         AltosFlightReader       reader;
  34         AltosState              old_state, state;
  35         AltosListenerState      listener_state;
  36         AltosFlightDisplay      display;
  37
  38         synchronized void show_safely() {
  39                 final AltosState my_state = state;
  40                 final AltosListenerState my_listener_state = listener_state;
  41                 Runnable r = new Runnable() {
  42                                 public void run() {
  43                                         try {
  44                                                 display.show(my_state, my_listener_state);
  45                                         } catch (Exception ex) {
  46                                         }
  47                                 }
  48                         };
  49                 SwingUtilities.invokeLater(r);
  50         }
  51
  52         void reading_error_internal() {
  53                 JOptionPane.showMessageDialog(parent,
  54                                               String.format("Error reading from \"%s\"", reader.name),
  55                                               "Telemetry Read Error",
  56                                               JOptionPane.ERROR_MESSAGE);
  57         }
  58
  59         void reading_error_safely() {
  60                 Runnable r = new Runnable() {
  61                                 public void run() {
  62                                         try {
  63                                                 reading_error_internal();
  64                                         } catch (Exception ex) {
  65                                         }
  66                                 }
  67                         };
  68                 SwingUtilities.invokeLater(r);
  69         }
  70
  71         class IdleThread extends Thread {
  72
  73                 boolean started;
  74                 int     report_interval;
  75                 long    report_time;
  76
  77                 public synchronized void report(boolean last) {
  78                         if (state == null)
  79                                 return;
  80
  81                         if (state.height() != AltosLib.MISSING) {
  82                                 if (state.from_pad != null) {
  83                                         voice.speak("Height %s, bearing %s %d, elevation %d, range %s, .\n",
  84                                                     AltosConvert.height.say(state.gps_height()),
  85                                                     state.from_pad.bearing_words(
  86                                                             AltosGreatCircle.BEARING_VOICE),
  87                                                     (int) (state.from_pad.bearing + 0.5),
  88                                                     (int) (state.elevation + 0.5),
  89                                                     AltosConvert.distance.say(state.range));
  90                                 } else {
  91                                         voice.speak("Height %s.\n",
  92                                                     AltosConvert.height.say(state.height()));
  93                                 }
  94                         }
  95                 }
  96
  97                 long now () {
  98                         return System.currentTimeMillis();
  99                 }
 100
 101                 void set_report_time() {
 102                         report_time = now() + report_interval;
 103                 }
 104
 105                 public void run () {
 106                         try {
 107                                 for (;;) {
 108                                         if (reader.has_monitor_battery()) {
 109                                                 listener_state.battery = reader.monitor_battery();
 110                                                 show_safely();
 111                                         }
 112                                         set_report_time();
 113                                         for (;;) {
 114                                                 voice.drain();
 115                                                 synchronized (this) {
 116                                                         long    sleep_time = report_time - now();
 117                                                         if (sleep_time <= 0)
 118                                                                 break;
 119                                                         wait(sleep_time);
 120                                                 }
 121                                         }
 122
 123                                         report(false);
 124                                 }
 125                         } catch (InterruptedException ie) {
 126                                 try {
 127                                         voice.drain();
 128                                 } catch (InterruptedException iie) { }
 129                         }
 130                 }
 131
 132                 public synchronized void notice(boolean spoken) {
 133                         if (old_state != null && old_state.state() != state.state()) {
 134                                 report_time = now();
 135                                 this.notify();
 136                         } else if (spoken)
 137                                 set_report_time();
 138                 }
 139
 140                 public IdleThread() {
 141                         report_interval = 10000;
 142                 }
 143         }
 144
 145         synchronized boolean tell() {
 146                 boolean ret = false;
 147                 if (old_state == null || old_state.gps_ready != state.gps_ready) {
 148                         if (state.gps_ready) {
 149                                 voice.speak("GPS ready");
 150                                 ret = true;
 151                         }
 152                         else if (old_state != null) {
 153                                 voice.speak("GPS lost");
 154                                 ret = true;
 155                         }
 156                 }
 157                 old_state = state;
 158                 return ret;
 159         }
 160
 161         public void run() {
 162                 boolean         interrupted = false;
 163                 boolean         told;
 164
 165                 idle_thread = new IdleThread();
 166                 idle_thread.start();
 167
 168                 try {
 169                         for (;;) {
 170                                 try {
 171                                         state = reader.read();
 172                                         if (state == null) {
 173                                                 listener_state.running = false;
 174                                                 break;
 175                                         }
 176                                         reader.update(state);
 177                                         show_safely();
 178                                         told = tell();
 179                                         idle_thread.notice(told);
 180                                 } catch (ParseException pp) {
 181                                         System.out.printf("Parse error: %d \"%s\"\n", pp.getErrorOffset(), pp.getMessage());
 182                                 } catch (AltosCRCException ce) {
 183                                         ++listener_state.crc_errors;
 184                                         show_safely();
 185                                 }
 186                         }
 187                 } catch (InterruptedException ee) {
 188                         interrupted = true;
 189                 } catch (IOException ie) {
 190                         reading_error_safely();
 191                 } finally {
 192                         if (!interrupted)
 193                                 idle_thread.report(true);
 194                         reader.close(interrupted);
 195                         idle_thread.interrupt();
 196                         try {
 197                                 idle_thread.join();
 198                         } catch (InterruptedException ie) {}
 199                 }
 200         }
 201
 202         public TeleGPSDisplayThread(Frame in_parent, AltosVoice in_voice, AltosFlightDisplay in_display, AltosFlightReader in_reader) {
 203                 listener_state = new AltosListenerState();
 204                 parent = in_parent;
 205                 voice = in_voice;
 206                 display = in_display;
 207                 reader = in_reader;
 208                 display.reset();
 209         }
 210 }