How to get the Latitude and Longitude of the mobile in QT ??

[naufalahad]

Hi All,
I am new to Qt i am in need of getting the latitude and longitude of the mobile.
I had searched this below website but i am unable to get the desired result!!

http://www.developer.nokia.com/Commu...location_in_Qt

I tried it by editing and also downloaded the zip file and run but i could not find the any solution.

If anyone comes up with an answer will be highly appreciated!!!!!

Thanks in advance and Regards,
Naufal.A

[savaj]

What do you get in result?

Note that GPS receiver may receive poor data in closed environment(Or in weather with dense cloud). You will get better data in open space (outside office or terrace).

[rahulvala]

What device are you using ? What are the errors ? How you are using the code ?

regards,
rahul

[naufalahad]

What device are you using ? What are the errors ? How you are using the code ?

Hi Rahulvala,
I am using C7 nokia phone,before that i have a doubt, that i did not try it installing in mobile phone, i tried only in simulator.
Whether it would work properly??? or else i have to install and check it out??

I did not get any error , i am getting a white screen with a dialog box displaying the no. of satellite monitors!!!

Thanks in advance and Regards,
Naufal.A

[naufalahad]

What do you get in result?

Note that GPS receiver may receive poor data in closed environment(Or in weather with dense cloud). You will get better data in open space (outside office or terrace).

Hi Savaj,
I am using c7 mobile but i did not install and checked it out ... i tried only in Qt software
Here is the main.cpp code in which i get an error stating geoPositionInfo was not decalred and i cannot call the function from main.cpp to mainwindow.cpp

int main(int argc, char *argv[])
{
QApplication app(argc, argv);

MainWindow mainWindow;
mainWindow.startGPS();
mainWindow.positionUpdated(geoPositionInfo);

// mainWindow.setOrientation(MainWindow::ScreenOrientationAuto);
mainWindow.showExpanded();
return app.exec();
}


Thanks in advance and Regards,
Naufal.A

[rahulvala]

Ya, sure ,It should work ,and that code was checked and run in the device.

Try to check in your device,

[naufalahad]

Hi Rahulvala,
I will check out and let you know in sometime!!!

Thanks a lot and Regards,
Naufal.A

[naufalahad]

Ya, sure ,It should work ,and that code was checked and run in the device.

Try to check in your device,

Hi Rahulvala,
I am getting errors while building and creating a sis file.
I am not able find out those errors and also sis file is not created!!!!

These are the errors which i get when i give build:
F:\rarfiles\QtMobilityLocation\LocationAPIExample\src\mainwindow.cpp:1: In file included from F:/rarfiles/QtMobilityLocation/LocationAPIExample/src/mainwindow.cpp:1:
F:\rarfiles\QtMobilityLocation\LocationAPIExample\src\mainwindow.h:4: error: QtCore/QPointer: No such file or directory
:-1: error: Recipe compile failed with exit code 1.
:-1: Running command: C:/QtSDK/Symbian/tools/gcce4/bin/arm-none-symbianelf-g++.exe -O0 -g -gdwarf-2 -fexceptions -Wall -Wno-unknown-pragmas -march=armv5te -mapcs -mthumb-interwork -c -mthumb -D__MARM_THUMB__ -mfloat-abi=soft -fvisibility-inlines-hidden -x c++ -Wno-ctor-dtor-privacy -D__MARM_INTERWORK__ -D__SUPPORT_CPP_EXCEPTIONS__ -D_UNICODE -D__SYMBIAN32__ -D__EPOC32__ -D__MARM__ -D__EABI__ '-D__PRODUCT_INCLUDE__="C:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/epoc32/include/feature_settings.hrh"' -DUNICODE -DQT_KEYPAD_NAVIGATION -DQT_SOFTKEYS_ENABLED -DQT_USE_MATH_H_FLOATS -DQT_WEBKIT_LIB -DQT_GUI_LIB -DQT_CORE_LIB -D__MARM_ARMV5__ -D__GCCE_4__ -D__GCCE_4_4__ -D_DEBUG -D__GCCE__ -D__EXE__ -D__SYMBIAN_STDCPP_SUPPORT__ -include C:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/epoc32/include/gcce/gcce.h -IF:/rarfiles/QtMobilityLocation/LocationAPIExample/src -IF:/rarfiles/QtMobilityLocation/LocationAPIExample -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474C:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/include/QtCore -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474C:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/include/QtGui -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474C:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/include/QtWebKit -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474C:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/include -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474C:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/mkspecs/common/symbian -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/epoc32/include -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/epoc32/include/stdapis -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/epoc32/include/stdapis/sys -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/epoc32/include/mw -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/epoc32/include/platform/mw -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/epoc32/include/platform -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/epoc32/include/platform/loc -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/epoc32/include/platform/mw/loc -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/epoc32/include/platform/loc/sc -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/epoc32/include/platform/mw/loc/sc -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/epoc32/include/stdapis/stlportv5 -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474C:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/include/QtXmlPatterns -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474C:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/include/QtNetwork -IF:/rarfiles/QtMobilityLocation/LocationAPIExample/moc -IF:/rarfiles/QtMobilityLocation/LocationAPIExample/src -IF:/rarfiles/QtMobilityLocation/LocationAPIExample/ui -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/epoc32/include -IC:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/epoc32/include/stdapis -MD -MF C:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/epoc32/build/locationapiexample/c_542cab462d0bec16/LocationAPIExample_exe/armv5/udeb/mainwindow.o.d -o C:/QtSDK/Symbian/SDKs/SymbianSR1Qt474/epoc32/build/locationapiexample/c_542cab462d0bec16/LocationAPIExample_exe/armv5/udeb/mainwindow.o F:/rarfiles/QtMobilityLocation/LocationAPIExample/src/mainwindow.cpp
In file included from F:/rarfiles/QtMobilityLocation/LocationAPIExample/src/mainwindow.cpp:1:
F:/rarfiles/QtMobilityLocation/LocationAPIExample/src/mainwindow.h:4: fatal error: QtCore/QPointer: No such file or directory
compilation terminated.
F:\rarfiles\QtMobilityLocation\LocationAPIExample\src\main.cpp:1: In file included from F:/rarfiles/QtMobilityLocation/LocationAPIExample/src/main.cpp:1:
F:\rarfiles\QtMobilityLocation\LocationAPIExample\src\mainwindow.h:4: error: QtCore/QPointer: No such file or directory
:-1: error: Recipe compile failed with exit code 1.
F:\rarfiles\QtMobilityLocation\LocationAPIExample\moc\..\src\mainwindow.h:4: error: QtCore/QPointer: No such file or directory
:-1: error: Recipe compile failed with exit code 1.
:-1: error: The make-engine exited with errors.

Thanks and Regards,
Naufal.A

[rahulvala]

your project and source of Qt SDK , both are in different directory, create project in the directory where Qt SDK is installed.

then check again.

regards,
rahul

[naufalahad]

Hi Rahulvala,
Ya i got the sis file when storing the file in the same directory and i will check for the result!!!!!
Thanks a lotttt

Thanks and Regards,
Naufal.A

[naufalahad]

Hi Rahulvala,
Can i know what will be the output???
i am getting a blank screen and nothing else in that page!!!!
if you know the resultant output kindly tell me ..

Thanks and Regards,
Naufal.A

[naufalahad]

Hi,
I had tried using the below link and i am unable to retrieve any values from that ..

http://www.developer.nokia.com/Commu...location_in_Qt

Can i know how to get the latitude and longitude values that should be displayed in ie, messagebox or something else!

Kindly anyone help me in getting me a solution for it.

Thanks in advance and Regards,
Naufal.A

[naufalahad]

Hi,
This is my .h and .cpp files.
May i know what is the error and problem in this???
Can anyone solve these

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QtGui/QMainWindow>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
Q_OBJECT
public:
enum ScreenOrientation {
ScreenOrientationLockPortrait,
ScreenOrientationLockLandscape,
ScreenOrientationAuto
};

explicit MainWindow(QWidget *parent = 0);
virtual ~MainWindow();

// Note that this will only have an effect on Symbian and Fremantle.
void setOrientation(ScreenOrientation orientation);

void showExpanded();

private slots:
void on_pushButton_clicked();

private:
Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H


QGeoPositionInfo.h


#include <QGeoPositionInfo>
#include <QGeoPositionInfoSource>


#include <QDebug>

#include <QPointer>

// QtMobility namespace
QTM_USE_NAMESPACE

class MainWindow : public QMainWindow
{
Q_OBJECT

public slots:
/**
* Called when the current position is updated.
*/
void positionUpdated(QGeoPositionInfo geoPositionInfo);

public:
/**
* Obtains the location data source and starts listening for position
* changes.
*/
void startGPS();

private:
QPointer<QGeoPositionInfoSource> locationDataSource;
QGeoPositionInfo myPositionInfo;
}

main.cpp


#include "mainwindow.h"

#include <QtGui/QApplication>

int main(int argc, char *argv[])
{
QApplication app(argc, argv);

MainWindow mainWindow;
mainWindow.setOrientation(MainWindow::ScreenOrientationAuto);
mainWindow.showExpanded();

return app.exec();
}

mainwindow.cpp


#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "qgeopositioninfo.h"

#include <QtCore/QCoreApplication>

MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent), ui(new Ui::MainWindow)
{
ui->setupUi(this);
}

MainWindow::~MainWindow()
{
delete ui;
}

void MainWindow::setOrientation(ScreenOrientation orientation)
{
#if defined(Q_OS_SYMBIAN)
// If the version of Qt on the device is < 4.7.2, that attribute won't work
if (orientation != ScreenOrientationAuto) {
const QStringList v = QString::fromAscii(qVersion()).split(QLatin1Char('.'));
if (v.count() == 3 && (v.at(0).toInt() << 16 | v.at(1).toInt() << 8 | v.at(2).toInt()) < 0x040702) {
qWarning("Screen orientation locking only supported with Qt 4.7.2 and above");
return;
}
}
#endif // Q_OS_SYMBIAN

Qt::WidgetAttribute attribute;
switch (orientation) {
#if QT_VERSION < 0x040702
// Qt < 4.7.2 does not yet have the Qt::WA_*Orientation attributes
case ScreenOrientationLockPortrait:
attribute = static_cast<Qt::WidgetAttribute>(128);
break;
case ScreenOrientationLockLandscape:
attribute = static_cast<Qt::WidgetAttribute>(129);
break;
default:
case ScreenOrientationAuto:
attribute = static_cast<Qt::WidgetAttribute>(130);
break;
#else // QT_VERSION < 0x040702
case ScreenOrientationLockPortrait:
attribute = Qt::WA_LockPortraitOrientation;
break;
case ScreenOrientationLockLandscape:
attribute = Qt::WA_LockLandscapeOrientation;
break;
default:
case ScreenOrientationAuto:
attribute = Qt::WA_AutoOrientation;
break;
#endif // QT_VERSION < 0x040702
};
setAttribute(attribute, true);
}

void MainWindow::showExpanded()
{
#if defined(Q_OS_SYMBIAN) || defined(Q_WS_SIMULATOR)
showFullScreen();
#elif defined(Q_WS_MAEMO_5)
showMaximized();
#else
show();
#endif
}

void MainWindow:n_pushButton_clicked()
{
QGeoPositionInfo *ge = new QGeoPositionInfo;
ge->startGPS();
}

QGeoPositionInfo.cpp


#include "qgeopositioninfo.h"
#include "ui_qgeopositioninfo.h"
#include <QGeoCoordinate>

QGeoPositionInfo::QGeoPositionInfo(QWidget *parent) :
QWidget(parent),
ui(new Ui::QGeoPositionInfo)
{
ui->setupUi(this);
}

QGeoPositionInfo::~QGeoPositionInfo()
{
delete ui;
}



void QGeoPositionInfo::startGPS()
{
// Obtain the location data source if it is not obtained already
if (!locationDataSource)
{
locationDataSource =
QGeoPositionInfoSource::createDefaultSource(this);
// Whenever the location data source signals that the current
// position is updated, the positionUpdated function is called
connect(locationDataSource, SIGNAL(positionUpdated(QGeoPositionInfo)),
this, SLOT(positionUpdated(QGeoPositionInfo)));

// Start listening for position updates
locationDataSource->startUpdates();
}
}

void QGeoPositionInfo:ositionUpdated(QGeoPositionInfo geoPositionInfo)
{
if (geoPositionInfo.isValid())
{
// We've got the position. No need to continue the listening.
locationDataSource->stopUpdates();

// Save the position information into a member variable
myPositionInfo = geoPositionInfo;

// Get the current location as latitude and longitude
QGeoCoordinate geoCoordinate = geoPositionInfo.coordinate();
qreal latitude = geoCoordinate.latitude();
qreal longitude = geoCoordinate.longitude();
qDebug() << QString("Latitude: %1 Longitude: %2").arg(latitude).arg(longitude);
}
}

[naufalahad]

Hi,
As already stated, i am getting only blank screen while running on both simulator and also in mobile phone.
I had tried implementing in a new application and also different methods but i am unable to get the result than blank screen.

This is the link below where i have downloaded the .zip file and tried running the application.

http://www.developer.nokia.com/docum...cation/05.html

I need some help on what to do and how to get the latitude and longitude of the current location.
The UI is also empty and i cannot able to find out or create any message box to display it.

Can anyone come up with an solution will be very much appreciated!!!

Thanks in advance and regards,
Naufal.A

[mahbub_s60]

Hi,
I just copied the following code from the map demo example (part of mobility example) It should work.
It will gives you the latitude and longiture that you can show in notes or dialog what ever..

QGeoPositionInfoSource * positionSource = QGeoPositionInfoSource::createDefaultSource(this);

if (!positionSource) {
// some...
} else {
positionSource->setUpdateInterval(1000);
connect(positionSource, SIGNAL(positionUpdated(QGeoPositionInfo)),
this, SLOT(updateMyPosition(QGeoPositionInfo)));
positionSource->startUpdates();
}
}




void MainWindow::updateMyPosition(QGeoPositionInfo info)
{
qDebug() << " MainWindow::updateMyPosition" ;
if (info.isValid()) {
QGeoCoordinate coord = info.coordinate();
double latitude = coord.latitude();
double longitude = coord.longitude();

qDebug() << latitude;
qDebug() << longitude;
}
}