git.maemo.org Git - jspeed/blob - src/location.cpp

   1 /*
   2  * This file is part of jSpeed.
   3  *
   4  * jSpeed 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 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * jSpeed is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with jSpeed.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18
  19 #include <QtCore/QDebug>
  20 #include "location.h"
  21
  22 namespace
  23 {
  24     static const double KM_MULTIPLIER = 1.0;
  25     static const double MILE_MULTIPLIER = 0.621371192;
  26 }
  27
  28 Location::Unit Location::unit_ = Location::KM;
  29
  30 Location::Location(QObject* parent): QObject(parent), started_(false),
  31 control_(0), device_(0)
  32 {
  33     g_type_init();
  34 }
  35
  36 Location::~Location()
  37 {
  38     end();
  39 }
  40
  41 void Location::start()
  42 {
  43     control_ = location_gpsd_control_get_default();
  44     device_ = (LocationGPSDevice*) g_object_new(LOCATION_TYPE_GPS_DEVICE, NULL);
  45
  46     g_object_set(G_OBJECT(control_),
  47                  "preferred-method", LOCATION_METHOD_USER_SELECTED,
  48                  "preferred-interval", LOCATION_INTERVAL_DEFAULT,
  49                  NULL);
  50
  51     g_signal_connect(control_, "error-verbose", G_CALLBACK(onError), this);
  52     g_signal_connect(device_, "changed", G_CALLBACK(onChanged), this);
  53
  54     location_gpsd_control_start(control_);
  55
  56     started_ = true;
  57 }
  58
  59 void Location::end()
  60 {
  61     if(!started_)
  62     {
  63         return;
  64     }
  65
  66     location_gpsd_control_stop(control_);
  67
  68     g_object_unref(device_);
  69     device_ = 0;
  70     g_object_unref(control_);
  71     control_ = 0;
  72
  73     started_ = false;
  74 }
  75
  76 bool Location::hasFix() const
  77 {
  78     if(!started_)
  79     {
  80         return false;
  81     }
  82
  83     return (device_->status == LOCATION_GPS_DEVICE_STATUS_FIX);
  84 }
  85
  86 double Location::getSignalStrength() const
  87 {
  88     if(!hasFix())
  89     {
  90         qDebug() << "No fix";
  91         return 0.0;
  92     }
  93
  94     if(device_->satellites_in_view == 0)
  95     {
  96         return 0.0;
  97     }
  98
  99     double val = (device_->satellites_in_use / static_cast<double>(device_->satellites_in_view)) * 100.0;
 100
 101     if(val > 100.0)
 102     {
 103         val = 100.0;
 104     }
 105
 106     return val;
 107 }
 108
 109 void Location::setUnit(Location::Unit unit)
 110 {
 111     unit_ = unit;
 112 }
 113
 114 Location::Unit Location::getUnit()
 115 {
 116     return unit_;
 117 }
 118
 119 double Location::getUnitMultiplier()
 120 {
 121     if(unit_ == MILE)
 122     {
 123         return MILE_MULTIPLIER;
 124     }
 125
 126     return KM_MULTIPLIER;
 127 }
 128
 129 void Location::onChanged(LocationGPSDevice *device, gpointer data)
 130 {
 131     if(device && device->fix &&
 132        !(device->fix->fields & LOCATION_GPS_DEVICE_NONE_SET))
 133     {
 134
 135         Fix fix;
 136         fix.unit = unit_;
 137         fix.time = device->fix->time;
 138         fix.ept = device->fix->ept;
 139
 140         if (device->fix->fields & LOCATION_GPS_DEVICE_LATLONG_SET)
 141         {
 142             fix.latitude = device->fix->latitude;
 143             fix.longitude = device->fix->longitude;
 144             fix.eph = device->fix->eph;
 145         }
 146
 147         if(device->fix->fields & LOCATION_GPS_DEVICE_ALTITUDE_SET)
 148         {
 149             fix.altitude = device->fix->altitude;
 150             fix.epv = device->fix->epv;
 151         }
 152
 153         if(device->fix->fields & LOCATION_GPS_DEVICE_SPEED_SET)
 154         {
 155             fix.kmSpeed = device->fix->speed;
 156             fix.speed = device->fix->speed * getUnitMultiplier();
 157             fix.eps = device->fix->eps;
 158         }
 159
 160         if(device->fix->fields & LOCATION_GPS_DEVICE_TRACK_SET)
 161         {
 162             fix.track = device->fix->track;
 163             fix.epd = device->fix->epd;
 164         }
 165
 166         if(device->fix->fields & LOCATION_GPS_DEVICE_CLIMB_SET)
 167         {
 168             fix.climb = device->fix->climb;
 169             fix.epc = device->fix->epc;
 170         }
 171
 172         Location* meh = (Location*) data;
 173         meh->emit locationChanged(fix);
 174     }
 175 }
 176
 177 void Location::onError(LocationGPSDControl *control, LocationGPSDControlError error, gpointer data)
 178 {
 179     Q_UNUSED(control);
 180
 181     Error err = SYSTEM_ERROR;
 182
 183     switch(error)
 184     {
 185     case LOCATION_ERROR_USER_REJECTED_DIALOG:
 186         err = USER_REJECTED_DIALOG;
 187         break;
 188     case LOCATION_ERROR_USER_REJECTED_SETTINGS:
 189         err = USER_REJECTED_SETTINGS;
 190         break;
 191     case LOCATION_ERROR_BT_GPS_NOT_AVAILABLE:
 192         err = GPS_NOT_AVAILABLE;
 193         break;
 194     case LOCATION_ERROR_METHOD_NOT_ALLOWED_IN_OFFLINE_MODE:
 195         err = NOT_ALLOWED_IN_OFFLINE_MODE;
 196         break;
 197     case LOCATION_ERROR_SYSTEM:
 198         err = SYSTEM_ERROR;
 199         break;
 200     }
 201
 202     Location* meh = (Location*) data;
 203     meh->emit locationError(err);
 204 }
 205
 206 Location::Fix::Fix()
 207 {
 208     unit = KM;
 209     kmSpeed = 0.0;
 210     time = 0.0;
 211     ept = 0.0;
 212     latitude = 0.0;
 213     longitude = 0.0;
 214     eph = 0.0;
 215     altitude = 0.0;
 216     epv = 0.0;
 217     track = 0.0;
 218     epd = 0.0;
 219     speed = 0.0;
 220     eps = 0.0;
 221     climb = 0.0;
 222     epc = 0.0;
 223 }