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Code Examples Sensors API: Difference between revisions
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'''English''' [[Code Examples Sensors API Spanish|Spanish]] | {{Cleanup | reason=Auto-imported from ExpressionEngine.}} | ||
'''English''' [[Code Examples Sensors API Spanish|Spanish]] | |||
[[Category:Developing with Qt::QtMobility]] | |||
= Overview = | = Overview = | ||
This page points to and provides quick overviews of existing code examples using the | This page points to and provides quick overviews of existing code examples using the [http://doc.qt.nokia.com/qtmobility-1.1.0/sensors-api.html Sensors API], one of the suite of Qt Mobilty APIs. | ||
== Fall detector == | == Fall detector == | ||
The | The [http://wiki.forum.nokia.com/index.php/Qt_Mobility_example_application:_Fall_Detector Fall Detector example] from Forum Nokia uses the accelerometer in a mobile device to detect if the user has fallen, then uses the | ||
* | * [http://doc.qt.nokia.com/qtmobility-1.1.0/location-overview.html Location API] to get the user's location | ||
* the | * the [http://doc.qt.nokia.com/qtmobility-1.1.0/contacts.html Contacts API] to store and access an email address to be notified in the event of a fall | ||
* and the | * and the [http://doc.qt.nokia.com/qtmobility-1.1.0/messaging.html Messaging API ] to send an email notification with photo attachment. | ||
[[Image:http://www.forum.nokia.com/piazza/wiki/images/1/15/Falldetector--screens.png?20100324100739|Fall Dector Screen Shot]] | [[Image:http://www.forum.nokia.com/piazza/wiki/images/1/15/Falldetector--screens.png?20100324100739|Fall Dector Screen Shot]] | ||
Here's the code snippet for the fall detector using the Sensors API: | |||
<code>#include | <code> | ||
#include <QAccelerometer> | |||
// Neccessary for Qt Mobility API usage | // Neccessary for Qt Mobility API usage | ||
QTM_USE_NAMESPACE | |||
class AccelerationInfo : public QObject, public QAccelerometerFilter | class AccelerationInfo : public QObject, public QAccelerometerFilter | ||
{ | |||
Q_OBJECT | |||
public: | public: | ||
AccelerationInfo(QObject* parent = 0) : QObject(parent) | AccelerationInfo(QObject* parent = 0) : QObject(parent) | ||
{ | |||
m_sensor = new QAccelerometer(this); | |||
m_sensor->addFilter(this); | |||
m_sensor->start(); | |||
} | |||
private slots: | private slots: | ||
// Override of QAcclerometerFilter::filter(QAccelerometerReading*) | // Override of QAcclerometerFilter::filter(QAccelerometerReading*) | ||
void filter(QAccelerometerReading* reading) | |||
{ | |||
qreal x = reading->x(); | |||
qreal y = reading->y(); | |||
qreal z = reading->z(); | |||
// Process acceleration sensor readings … | // Process acceleration sensor readings … | ||
qDebug( | qDebug("Current device acceleration: x=%f y=%f z=%f", x, y, z); | ||
} | |||
private: | private: | ||
QAccelerometer* m_sensor; | QAccelerometer* m_sensor; | ||
}; | |||
</code> | </code> | ||
Line 45: | Line 64: | ||
== Use accelerometer to control an Open GL-ES 3D model == | == Use accelerometer to control an Open GL-ES 3D model == | ||
This sensors tutorial from | This sensors tutorial from [http://www.mobileqt.de/wiki/daten_des_accelerometer_sensors_mit_einem_opengl_objekt_verknuepfen Mobile Qt-Entwicklung] (Mobile Qt Development) shows the accelerometer in an N900 manipulating a 3D model created using Open GL. The [http://www.mobileqt.de/wiki/daten_des_accelerometer_sensors_mit_einem_opengl_objekt_verknuepfen descriptive text is in German], but all [http://www.mobileqt.de/tutorials/6/glsensordemo-0.1.zip the code is available in a downloadable package] and this [http://www.youtube.com/watch?v=uJpw0yeHJl8 demo video] shows you how it works. | ||
Here is the relevant accelerometer code: | Here is the relevant accelerometer code: | ||
<code>GLWidget::GLWidget(QWidget *parent) : | <code> | ||
GLWidget::GLWidget(QWidget *parent) : | |||
QGLWidget(parent) | |||
{ | { | ||
setWindowTitle(tr("Sensor-GL-Demo")); | |||
makeCurrent(); | |||
setAttribute(Qt::WA_PaintOnScreen); | setAttribute(Qt::WA_PaintOnScreen); | ||
setAttribute(Qt::WA_NoSystemBackground); | |||
setAutoBufferSwap(false); | |||
xRot = 0; | xRot = 0; | ||
yRot = 0; | |||
zRot = 0; | |||
_rotationSensorAvailable = false; | _rotationSensorAvailable = false; | ||
_rotationSensor = new QtMobility::QAccelerometer(this); | |||
_rotationSensor->connect(); | |||
if (!_rotationSensor->isAvailable()) { | |||
qWarning("No acceleration sensor available!"); | |||
} else { | |||
_rotationSensorAvailable = true; | |||
_rotationSensor->setSignalEnabled(false); // we get the values from the sensor itself | |||
_rotationSensor->setUpdateInterval(100); // as quickly as possible | |||
_rotationSensor->start(); | |||
} | |||
QTimer *timer = new QTimer(this); | QTimer *timer = new QTimer(this); | ||
timer->setInterval(10); | |||
QObject::connect(timer, SIGNAL (timeout()), this, SLOT (updateGL())); | |||
timer->start(); | |||
showFullScreen(); | |||
} | |||
</code> |
Latest revision as of 07:26, 17 May 2017
This article may require cleanup to meet the Qt Wiki's quality standards. Reason: Auto-imported from ExpressionEngine. Please improve this article if you can. Remove the {{cleanup}} tag and add this page to Updated pages list after it's clean. |
English Spanish
Overview
This page points to and provides quick overviews of existing code examples using the Sensors API, one of the suite of Qt Mobilty APIs.
Fall detector
The Fall Detector example from Forum Nokia uses the accelerometer in a mobile device to detect if the user has fallen, then uses the
- Location API to get the user's location
- the Contacts API to store and access an email address to be notified in the event of a fall
- and the Messaging API to send an email notification with photo attachment.
Fall Dector Screen Shot Here's the code snippet for the fall detector using the Sensors API:
#include <QAccelerometer>
// Neccessary for Qt Mobility API usage
QTM_USE_NAMESPACE
class AccelerationInfo : public QObject, public QAccelerometerFilter
{
Q_OBJECT
public:
AccelerationInfo(QObject* parent = 0) : QObject(parent)
{
m_sensor = new QAccelerometer(this);
m_sensor->addFilter(this);
m_sensor->start();
}
private slots:
// Override of QAcclerometerFilter::filter(QAccelerometerReading*)
void filter(QAccelerometerReading* reading)
{
qreal x = reading->x();
qreal y = reading->y();
qreal z = reading->z();
// Process acceleration sensor readings …
qDebug("Current device acceleration: x=%f y=%f z=%f", x, y, z);
}
private:
QAccelerometer* m_sensor;
};
Use accelerometer to control an Open GL-ES 3D model
This sensors tutorial from Mobile Qt-Entwicklung (Mobile Qt Development) shows the accelerometer in an N900 manipulating a 3D model created using Open GL. The descriptive text is in German, but all the code is available in a downloadable package and this demo video shows you how it works.
Here is the relevant accelerometer code:
GLWidget::GLWidget(QWidget *parent) :
QGLWidget(parent)
{
setWindowTitle(tr("Sensor-GL-Demo"));
makeCurrent();
setAttribute(Qt::WA_PaintOnScreen);
setAttribute(Qt::WA_NoSystemBackground);
setAutoBufferSwap(false);
xRot = 0;
yRot = 0;
zRot = 0;
_rotationSensorAvailable = false;
_rotationSensor = new QtMobility::QAccelerometer(this);
_rotationSensor->connect();
if (!_rotationSensor->isAvailable()) {
qWarning("No acceleration sensor available!");
} else {
_rotationSensorAvailable = true;
_rotationSensor->setSignalEnabled(false); // we get the values from the sensor itself
_rotationSensor->setUpdateInterval(100); // as quickly as possible
_rotationSensor->start();
}
QTimer *timer = new QTimer(this);
timer->setInterval(10);
QObject::connect(timer, SIGNAL (timeout()), this, SLOT (updateGL()));
timer->start();
showFullScreen();
}