QAltimeterReading

Since: 1.3

#include <QtSensors/QAltimeterReading>

QtSensors

The QAltimeterReading class holds readings from the altimeter sensor.

The altitude is reported in meters relative to mean sea level.

On BlackBerry, the altimeter uses a combination of pressure and location to determine the altitude, as using pressure alone would yield to inaccurate results due to changes in air pressure caused by the weather. The location information is used to compensate for the weather. This requires that the user has enabled location services in the global settings.


Overview

Inheritance

QSensorReading
QAltimeterReading

Properties Index

qrealaltitude [read-only]
QtMobility::qtimestamptimestamp [read-only]Inherited

Public Functions Index

qrealaltitude () const
voidsetAltitude (qreal altitude)
voidsetTimestamp (qtimestamp timestamp)Inherited
qtimestamptimestamp () const Inherited
QVariantvalue (int index) const Inherited
intvalueCount () const Inherited

Protected Functions Index

Only has inherited protected functions

virtual voidcopyValuesFrom (QSensorReading *other)Inherited
QScopedPointer< QSensorReadingPrivate > *d_ptr ()Inherited
QSensorReading (QObject *parent, QSensorReadingPrivate *d)Inherited

Properties

qreal altitude[read-only]

The altitude in meters relative to mean sea level.

QtMobility::qtimestamp timestampInherited[read-only]

the timestamp of the reading.

Returns the timestamp of the reading.

See also:

qtimestamp

Since:

1.0

,

1.0

Public Functions

qreal altitude ()

void setAltitude (
  • qrealaltitude)

Sets the altitude to altitude.

void setTimestamp (Inherited

Sets the timestamp of the reading.

Since:

1.0

qtimestamp timestamp ()Inherited

QVariant value (
  • intindex)
Inherited

Returns the value of the property at index.

Note that this function is slower than calling the data function directly.

Here is an example of getting a property via the different mechanisms available.

Accessing directly provides the best performance but requires compile-time knowledge of the data you are accessing.

QAccelerometerReading *reading = ...;
qreal x = reading->x();

You can also access a property by name. To do this you must call QObject::property().

qreal x = reading->property("x").value<qreal>();

Finally, you can access values via numeric index.

qreal x = reading->value(0).value<qreal>();

Note that value() can only access properties declared with Q_PROPERTY() in sub-classes of QSensorReading.

See also:

valueCount(), QObject::property()

Since:

1.0

int valueCount ()Inherited

Returns the number of extra properties that the reading has.

Note that this does not count properties declared in QSensorReading.

As an example, this returns 3 for QAccelerometerReading because there are 3 properties defined in that class.
Since:

1.0

Protected Functions

(Only has inherited protected functions)

virtual void copyValuesFrom (Inherited

QScopedPointer< QSensorReadingPrivate > * d_ptr ()Inherited

QSensorReading (
  • QObject *parent,
  • QSensorReadingPrivate *d )
Inherited

Last modified: 2014-03-13

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