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    40 ****************************************************************************/

    41 

    42 #include "qgeopositioninfosource_maemo5_p.h"

    43 #include "liblocationwrapper_p.h"

    44 

    45 using namespace std;

    46 

    47 QTM_BEGIN_NAMESPACE

    48 

    49 QGeoPositionInfoSourceMaemo::QGeoPositionInfoSourceMaemo(QObject *parent) 

    50     : QGeoPositionInfoSource(parent)

    51 {

    52     // default values

    53     availableMethods = SatellitePositioningMethods;

    54     

    55     timerInterval = DEFAULT_UPDATE_INTERVAL;

    56     updateTimer = new QTimer(this);

    57     updateTimer->setSingleShot(true);

    58     connect(updateTimer, SIGNAL(timeout()), this, SLOT(newPositionUpdate()));

    59 

    60     requestTimer = new QTimer(this);

    61     requestTimer->setSingleShot(true);

    62     connect(requestTimer, SIGNAL(timeout()), this, SLOT(requestTimeoutElapsed()));

    63 

    64     errorOccurred = false;

    65     errorSent = false;

    66 

    67     positionInfoState = QGeoPositionInfoSourceMaemo::Undefined;

    68 }

    69 

    70 int QGeoPositionInfoSourceMaemo::init()

    71 {

    72     if (LiblocationWrapper::instance()->inited()) {

    73         connect(LiblocationWrapper::instance(), SIGNAL(error()), this, SLOT(error()));

    74         return INIT_OK;

    75     } else {

    76         return INIT_FAILED;

    77     }

    78 }

    79 

    80 QGeoPositionInfo QGeoPositionInfoSourceMaemo::lastKnownPosition(bool fromSatellitePositioningMethodsOnly) const

    81 {

    82     return (LiblocationWrapper::instance()->lastKnownPosition(fromSatellitePositioningMethodsOnly));

    83 }

    84 

    85 QGeoPositionInfoSource::PositioningMethods QGeoPositionInfoSourceMaemo::supportedPositioningMethods() const

    86 {

    87     return availableMethods;

    88 }

    89 

    90 void QGeoPositionInfoSourceMaemo::setUpdateInterval(int msec)

    91 {

    92     bool updateTimerInterval = false;

    93 

    94     if (positionInfoState & QGeoPositionInfoSourceMaemo::PowersaveActive)

    95         if (positionInfoState & QGeoPositionInfoSourceMaemo::Stopped)

    96             updateTimerInterval = true;

    97 

    98     if (!msec) {

    99         timerInterval = MINIMUM_UPDATE_INTERVAL;

   100         QGeoPositionInfoSource::setUpdateInterval(0);

   101     } else {

   102         timerInterval = (msec < MINIMUM_UPDATE_INTERVAL) ? MINIMUM_UPDATE_INTERVAL : msec;

   103         QGeoPositionInfoSource::setUpdateInterval(timerInterval);

   104     }

   105 

   106     if (timerInterval >= POWERSAVE_THRESHOLD)

   107         positionInfoState |= QGeoPositionInfoSourceMaemo::PowersaveActive;

   108     else

   109         positionInfoState &= ~QGeoPositionInfoSourceMaemo::PowersaveActive;

   110 

   111     // If powersave has been active when new update interval has been set,

   112     // ensure that timer is started.

   113     if(updateTimerInterval)

   114         startLocationDaemon();

   115 

   116     // Ensure that new timer interval is taken into use immediately.

   117     activateTimer();

   118 }

   119 

   120 void QGeoPositionInfoSourceMaemo::setPreferredPositioningMethods(PositioningMethods sources)

   121 {

   122     Q_UNUSED(sources)

   123     return;

   124 }

   125 

   126 int QGeoPositionInfoSourceMaemo::minimumUpdateInterval() const

   127 {

   128     return MINIMUM_UPDATE_INTERVAL;

   129 }

   130 

   131 // public slots:

   132 void QGeoPositionInfoSourceMaemo::startUpdates()

   133 {

   134     startLocationDaemon();

   135 

   136     // Ensure that powersave is selected, if stopUpdates() has been called,

   137     // but selected update interval is still greater than POWERSAVE_THRESHOLD.

   138     if (timerInterval >= POWERSAVE_THRESHOLD)

   139         positionInfoState |= QGeoPositionInfoSourceMaemo::PowersaveActive;

   140 

   141     activateTimer();

   142 }

   143 

   144 void QGeoPositionInfoSourceMaemo::stopUpdates()

   145 {

   146     positionInfoState &= ~QGeoPositionInfoSourceMaemo::PowersaveActive;

   147     

   148     if (!(positionInfoState & QGeoPositionInfoSourceMaemo::RequestActive)) {

   149         updateTimer->stop();

   150         if (LiblocationWrapper::instance()->isActive())

   151             LiblocationWrapper::instance()->stop();

   152     }

   153 

   154     errorOccurred = false;

   155     errorSent = false;

   156 

   157     positionInfoState &= ~QGeoPositionInfoSourceMaemo::Started;

   158     positionInfoState |= QGeoPositionInfoSourceMaemo::Stopped;

   159 }

   160 

   161 void QGeoPositionInfoSourceMaemo::requestUpdate(int timeout)

   162 {

   163     int timeoutForRequest = 0;

   164 

   165     if (!timeout) {

   166         if (LiblocationWrapper::instance()->isActive())

   167             // If GPS is active, assume quick fix.

   168             timeoutForRequest = DEFAULT_UPDATE_INTERVAL;

   169         else

   170             // Otherwise reserve longer time to get a fix.

   171             timeoutForRequest = POWERSAVE_POWERON_PERIOD;

   172     } else if (timeout < MINIMUM_UPDATE_INTERVAL) {

   173         if (positionInfoState & QGeoPositionInfoSourceMaemo::RequestActive)

   174             return;

   175 

   176         emit updateTimeout();

   177         return;

   178     } else {

   179         timeoutForRequest = timeout;

   180     }

   181 

   182     positionInfoState |= QGeoPositionInfoSourceMaemo::RequestActive;

   183 

   184     if (!(LiblocationWrapper::instance()->isActive()))

   185         LiblocationWrapper::instance()->start();

   186 

   187     activateTimer();

   188     requestTimer->start(timeoutForRequest);

   189 }

   190 

   191 void QGeoPositionInfoSourceMaemo::newPositionUpdate()

   192 {

   193     if (LiblocationWrapper::instance()->fixIsValid()) {

   194         errorOccurred = false;

   195         errorSent = false;

   196 

   197         if (positionInfoState & QGeoPositionInfoSourceMaemo::RequestActive) {

   198             positionInfoState &= ~QGeoPositionInfoSourceMaemo::RequestActive;

   199             requestTimer->stop();

   200 

   201             if (positionInfoState & QGeoPositionInfoSourceMaemo::Stopped)

   202                 if (LiblocationWrapper::instance()->isActive())

   203                     LiblocationWrapper::instance()->stop();

   204 

   205             // Ensure that requested position fix is emitted even though

   206             // powersave is active and GPS would normally be off.

   207             if ((positionInfoState & QGeoPositionInfoSourceMaemo::PowersaveActive) &&

   208                (positionInfoState & QGeoPositionInfoSourceMaemo::Stopped)) {

   209                 emit positionUpdated(LiblocationWrapper::instance()->position());

   210             }

   211         }

   212 

   213         // Make sure that if update is triggered when waking up, there

   214         // is no false position update.

   215         if (!((positionInfoState & QGeoPositionInfoSourceMaemo::PowersaveActive) &&

   216              (positionInfoState & QGeoPositionInfoSourceMaemo::Stopped)))

   217             emit positionUpdated(LiblocationWrapper::instance()->position());

   218     } else {

   219         // if an error occurs when we are updating periodically and we haven't 

   220         // sent an error since the last fix...

   221         if (!(positionInfoState & QGeoPositionInfoSourceMaemo::RequestActive) && 

   222             errorOccurred && !errorSent) {

   223             errorSent = true;

   224             // we need to emit the updateTimeout signal

   225             emit updateTimeout();

   226         }

   227     }

   228     activateTimer();

   229 }

   230 

   231 void QGeoPositionInfoSourceMaemo::requestTimeoutElapsed()

   232 {

   233     updateTimer->stop();

   234     emit updateTimeout();

   235 

   236     positionInfoState &= ~QGeoPositionInfoSourceMaemo::RequestActive;

   237 

   238     if (positionInfoState & QGeoPositionInfoSourceMaemo::Stopped)

   239         if (LiblocationWrapper::instance()->isActive())

   240             LiblocationWrapper::instance()->stop();   

   241 

   242     activateTimer();

   243 }

   244 

   245 void QGeoPositionInfoSourceMaemo::error()

   246 {

   247     errorOccurred = true;

   248 }

   249 

   250 void QGeoPositionInfoSourceMaemo::activateTimer() {

   251     if (positionInfoState & QGeoPositionInfoSourceMaemo::RequestActive) {

   252         updateTimer->start(MINIMUM_UPDATE_INTERVAL);

   253         return;

   254     }

   255     

   256     if (positionInfoState & QGeoPositionInfoSourceMaemo::PowersaveActive) {

   257         if (positionInfoState & QGeoPositionInfoSourceMaemo::Started) {

   258             // Cannot call stopUpdates() here since we want to keep powersave

   259             // active.

   260             if (LiblocationWrapper::instance()->isActive())

   261                 LiblocationWrapper::instance()->stop();

   262             updateTimer->start(timerInterval - POWERSAVE_POWERON_PERIOD);

   263             errorOccurred = false;

   264             errorSent = false;

   265 

   266             positionInfoState &= ~QGeoPositionInfoSourceMaemo::Started;

   267             positionInfoState |= QGeoPositionInfoSourceMaemo::Stopped;

   268         } else if (positionInfoState & QGeoPositionInfoSourceMaemo::Stopped) {

   269             startLocationDaemon();

   270             updateTimer->start(POWERSAVE_POWERON_PERIOD);

   271         }

   272         return;

   273     }

   274 

   275     if (positionInfoState & QGeoPositionInfoSourceMaemo::Started)

   276         updateTimer->start(timerInterval);

   277 }

   278 

   279 void QGeoPositionInfoSourceMaemo::startLocationDaemon() {

   280     if (!(LiblocationWrapper::instance()->isActive()))

   281         LiblocationWrapper::instance()->start();

   282     positionInfoState |= QGeoPositionInfoSourceMaemo::Started;

   283     positionInfoState &= ~QGeoPositionInfoSourceMaemo::Stopped;

   284 }

   285 

   286 #include "moc_qgeopositioninfosource_maemo5_p.cpp"

   287 QTM_END_NAMESPACE

   288