Cascades Development

[xhotkey]

Based on https://developer.blackberry.com/cascades/documentation/device_platform/location/index.html, I tried to build the following codes:

/*
 * GPSinfo.h
 *
 *  Created on: Sep 18, 2012
 *      Author: CNTEXIE
 */
//  To start receiving position information,
//  create a default QGeoPositionInfoSource object,
//  connect its positionUpdated() signal to a slot
//  on your receiving object, configure the
//  DefaultGeoPositionSource instance
//  (setPreferredPositioningMethods(),
//  setUpdateInterval())
//  and then invoke startUpdates(). The
//  slot on your receiving object will be
//  invoked as close to the desired update
//  interval as possible, and will be passed
//  the position information in a GeoPosition instance.
#ifndef GPSINFO_H_
#define GPSINFO_H_

#include <QtLocationSubset/QGeoAddress>
#include <QtLocationSubset/QGeoCoordinate>
#include <QtLocationSubset/QGeoPlace>
#include <QtLocationSubset/QGeoPositionInfo>
#include <QtLocationSubset/QGeoPositionInfoSource>
#include <QtLocationSubset/QGeoSatelliteInfo>
#include <QtLocationSubset/QGeoSatelliteInfoSource>
#include <QtLocationSubset/QGeoSearchManager>
#include <QtLocationSubset/QGeoSearchManagerEngine>
#include <QtLocationSubset/QGeoSearchReply>
#include <QtLocationSubset/QNmeaPositionInfoSource>

using namespace bb::cascades;
using namespace std;

class GPSinfo: public QObject {
Q_OBJECT
public:
	GPSinfo();
	virtual ~GPSinfo();
private Q_SLOTS:
	void positionUpdated(const QGeoPositionInfo &info);
};

#endif /* GPSINFO_H_ */

/*
 * GPSinfo.cpp
 *
 *  Created on: Sep 18, 2012
 *      Author: CNTEXIE
 */

#include "GPSinfo.h"
using namespace bb::cascades;

GPSinfo::GPSinfo(QObject *parent = 0) :
		QObject(parent) {
	QGeoPositionInfoSource *source =
			QGeoPositionInfoSource::createDefaultSource(this);
	if (source) {
		connect(source, SIGNAL(positionUpdated(QGeoPositionInfo)), this,
				SLOT(positionUpdated(QGeoPositionInfo)));
		source->setPreferredPositioningMethods(
				PositioningMethod::SatellitePositioningMethods);
		source->setUpdateInterval(1000);
		source->setProperty("backgroundMode", true);
		source->startUpdates();
	}
}
void GPSinfo::positionUpdated(const QGeoPositionInfo &info) {
	// Here's where you can do something with the device's position
	qDebug() << "Position updated:" << info;
}

GPSinfo::~GPSinfo() {
	// TODO Auto-generated destructor stub
}

 The results are:

../src/GPSinfo.h:43:29: error: 'QGeoPositionInfo' does not name a type
../src/GPSinfo.h:43:47: error: ISO C++ forbids declaration of 'info' with no type [-fpermissive]
cc: C:/bbndk/host_10_0_6_1/win32/x86/usr/lib/gcc/i486-pc-nto-qnx8.0.0/4.6.3/cc1plus caught signal 1
make[2]: Leaving directory `C:/Users/CNTEXIE/ndk-10.0.6-workspace/xGPSmaster/x86'
make[2]: *** [o-g/.obj/app.o] Error 1
make[1]: Leaving directory `C:/Users/CNTEXIE/ndk-10.0.6-workspace/xGPSmaster/x86'
make[1]: *** [debug] Error 2
make: *** [Simulator-Debug] Error 2

Can some one help?

[kylefowler · Accepted solution]

Add this line..

using namespace QtMobilitySubset;

and have this added to your .pro file
LIBS += -lQtLocationSubset

[Bluenoser]

I am having the same problem. Here is my code.

#ifndef GPSINFO_H_
#define GPSINFO_H_

#include <QObject>
#include <QtLocationSubset/QGeoPositionInfo>
#include <QtLocationSubset/QGeoPositionInfoSource>

using namespace QtMobilitySubset;

class GPSInfo: public QObject
{
	Q_OBJECT

public:
	GPSInfo(QObject *parent);
	~GPSInfo();

private Q_SLOTS:
	void positionUpdated(const QGeoPositionInfo &info);

};

#endif /* GPSINFO_H_ */

#include "gpsinfo.h"

GPSInfo::GPSInfo(QObject *parent = 0) : QObject(parent) {
	QGeoPositionInfoSource *source = QGeoPositionInfoSource::createDefaultSource(this);
	if (source) {
		connect(source, SIGNAL(positionUpdated(QGeoPositionInfo)), this, SLOT(positionUpdated(QGeoPositionInfo)));
		source->setPreferredPositioningMethods(PositioningMethod::SatellitePositioningMethods);
		source->setUpdateInterval(1000);
		source->setProperty("backgroundMode", true);
		source->startUpdates();
	}
}

void positionUpdated(const QGeoPositionInfo &info) {
	// Here's where you can do something with the device's position
}

GPSInfo::~GPSInfo() {
	// TODO Auto-generated destructor stub
}

 I have included LIBS += -lQtLocationSubset into the .PRO file.

I am getting the following errors.

../src/gpsinfo.cpp:11:2: error: 'QGeoPositionInfoSource' was not declared in this scope
../src/gpsinfo.cpp:11:26: error: 'source' was not declared in this scope
../src/gpsinfo.cpp:11:35: error: 'QGeoPositionInfoSource' is not a class or namespace
../src/gpsinfo.cpp:14:42: error: 'PositioningMethod' has not been declared

It would be nice for the code sample at https://developer.blackberry.com/cascades/documentation/device_platform/location/ was a little nicer and  worked. How about making it a sample app?

[Bluenoser · Accepted solution]

Solved it.

The code sample is just that, a sample. You cannot use it as a basis for your code. This code compiles.

#ifndef GPSINFO_H_
#define GPSINFO_H_

#include <QObject>
#include <QtLocationSubset/QGeoPositionInfo>
#include <QtLocationSubset/QGeoPositionInfoSource>

using namespace QtMobilitySubset;

class GPSInfo: public QObject
{
	Q_OBJECT

public:
	GPSInfo(QObject *parent = 0);
	~GPSInfo();

private Q_SLOTS:
	void positionUpdated(const QGeoPositionInfo &info);

};

#endif /* GPSINFO_H_ */

#include "gpsinfo.hpp"

#include <QSettings>

GPSInfo::GPSInfo(QObject *parent) : QObject(parent) {

    QSettings settings;

	QGeoPositionInfoSource *source = QGeoPositionInfoSource::createDefaultSource(this);
	if (source) {
		connect(source, SIGNAL(positionUpdated(QGeoPositionInfo)), this, SLOT(positionUpdated(QGeoPositionInfo)));
		source->setPreferredPositioningMethods(QGeoPositionInfoSource::SatellitePositioningMethods);
		source->setUpdateInterval(1000);
		source->setProperty("backgroundMode", true);
		source->startUpdates();
	}
}

void positionUpdated(const QGeoPositionInfo &info) {
	// Here's where you can do something with the device's position
}

GPSInfo::~GPSInfo() {
	// TODO Auto-generated destructor stub
}

[xhotkey]

So the key is:

QGeoPositionInfoSource::SatellitePositioningMethods

 not:

PositioningMethod:atellitePositioningMethods