QGeoPositionInfoSource problem. I tried everything I could.

[sotmg]

Hi.

I want to know the GPS coordinates of the cellphone's current location.

Accuracy is not important to me so any possible method to aquire the location is accepted as long as it is availabe in Qt.

I read the wikis and articles regarding this and also searched the forums for such problems but couldn't find anything that helps my program.

I downloaded some example in one of the wikis and it didn't work too.

I need to use the GPS coordinates indoor most of the time.

I have a Nokia C6-01.

Ovi Maps works fine both outdoors and indoors.

Here is the header file:

#ifndef GPS_H_
#define GPS_H_

#include <QGeoPositionInfo>
#include <QGeoPositionInfoSource>

QTM_USE_NAMESPACE

class GPS : QObject
{
Q_OBJECT

public:
  GPS();
  ~GPS();

public slots:
  void
  positionUpdated(const QGeoPositionInfo &info);
  
  void
  updateTimeout();

private:
  QGeoPositionInfoSource *mvp_source;
  QGeoCoordinate mv_coordinate;
};

#endif /* GPS_H_ */

Here is the source:

#include "GPS.h"

GPS::GPS()
{
  this->mvp_source = QGeoPositionInfoSource::createDefaultSource(this);
  this->mvp_source->setPreferredPositioningMethods(QGeoPositionInfoSource::NonSatellitePositioningMethods);

  connect(this->mvp_source, SIGNAL(positionUpdated(QGeoPositionInfo)), this, SLOT(positionUpdated(QGeoPositionInfo)));
  connect(this->mvp_source, SIGNAL(updateTimeout()), this, SLOT(updateTimeout()));

  this->mvp_source->requestUpdate();
}

GPS::~GPS() {}

void GPS::positionUpdated(const QGeoPositionInfo &info)
{
  if (info.isValid())
      this->mv_coordinate = info.coordinate();
}

void GPS::updateTimeout()
{
  switch (this->mvp_source->preferredPositioningMethods())
    {
  case QGeoPositionInfoSource::SatellitePositioningMethods:
    this->mvp_source->setPreferredPositioningMethods(QGeoPositionInfoSource::NonSatellitePositioningMethods);
    break;

  case QGeoPositionInfoSource::NonSatellitePositioningMethods:
    this->mvp_source->setPreferredPositioningMethods(QGeoPositionInfoSource::SatellitePositioningMethods);
    break;

  default:
    this->mvp_source->setPreferredPositioningMethods(QGeoPositionInfoSource::SatellitePositioningMethods);
    break;
    }

  this->mvp_source->requestUpdate(1000 * 30);
}

Here is the project file:

TEMPLATE = app
TARGET = X
QT += core \
    gui \
    network
HEADERS += GPS.h \
    X.h
SOURCES += GPS.cpp \
    X.rss \
    X_reg.rss \
    main.cpp \
    X.cpp
FORMS += X.ui
RESOURCES += Resource.qrc
CONFIG += mobility \
    systeminfo
TRANSLATIONS = X.ts
MOBILITY += location \
    sensors
symbian: { 
    TARGET.UID3 = 0x00000000
    VERSION = 1.0.0
    ICON = Pixmap/Icon128.svg
    MMP_RULES += DEBUGGABLE_UDEBONLY
    vendorInfo = "%{\"X\"}" \
        ":\"X\""
    myDeployment.pkg_prerules += vendorInfo
    TARGET.CAPABILITY = Location \
        NetworkServices \
        ReadUserData \
        WriteUserData \
        ReadDeviceData \
        WriteDeviceData
    autoStartBlock = "SOURCEPATH ." \
        "START RESOURCE X.rss" \
        "END"
    MMP_RULES += autoStartBlock
    deployRscFile = "\"$${EPOCROOT}epoc32/data/X.rsc\" - \"C:/private/X/import/[X].rsc\""
    deployFiles.pkg_postrules += deployRscFile
    pixmapFiles.sources = Pixmap/*
    pixmapFiles.path = .
    DEPLOYMENT += deployFiles
    DEPLOYMENT += pixmapFiles
}

I have a valid PublisherID and development certificates.

The App works fine except for the GPS coordinates part.

[vineet.jain]

Try switching to Network-based GPS from your device settings in the Location application of the device, if its not already On, also try switching to other methods like A-GPS etc.

[sotmg]

I already tried changing options there in various ways but nothing worked.

I think the problem isn't there because Ovi Map works fine.

Note:
Forgot to tell in my last post that in the emulator positionUpdated is emited but when debugging on device or running the release inside the device it doesn't get emited.

[vineet.jain]

Try with the suggestion given here, though its for N900 , but the scenario is same: http://stackoverflow.com/questions/3...ut-not-on-n900

[sotmg]

The suggestion there was to use positionUpdated instead of lastKnownPosition to get the GPS coordinates reading.

I am already doing that.

I read that post twice incase there were some clues to try something else I didn't try yet. found nothing usefull.

[sotmg]

Being surrounded by tall buildings and no internet (WiFi/3G) available was the cause of my problem.

Problem is FIXED.

Thanks for the help.