/Qt 5.11

QGeoPositionInfo Class

The QGeoPositionInfo class contains information gathered on a global position, direction and velocity at a particular point in time. More...

Header: #include <QGeoPositionInfo>
qmake: QT += positioning
Since: Qt 5.2

Public Types

enum Attribute { Direction, GroundSpeed, VerticalSpeed, MagneticVariation, HorizontalAccuracy, VerticalAccuracy }

Public Functions

QGeoPositionInfo(const QGeoCoordinate &coordinate, const QDateTime &timestamp)
QGeoPositionInfo(const QGeoPositionInfo &other)
QGeoPositionInfo(QGeoPositionInfoPrivate &dd)
qreal attribute(QGeoPositionInfo::Attribute attribute) const
QGeoCoordinate coordinate() const
bool hasAttribute(QGeoPositionInfo::Attribute attribute) const
bool isValid() const
void removeAttribute(QGeoPositionInfo::Attribute attribute)
void setAttribute(QGeoPositionInfo::Attribute attribute, qreal value)
void setCoordinate(const QGeoCoordinate &coordinate)
void setTimestamp(const QDateTime &timestamp)
QDateTime timestamp() const
bool operator!=(const QGeoPositionInfo &other) const
QGeoPositionInfo & operator=(const QGeoPositionInfo &other)
bool operator==(const QGeoPositionInfo &other) const
QDataStream & operator<<(QDataStream &stream, QGeoPositionInfo::Attribute attr)
QDataStream & operator<<(QDataStream &stream, const QGeoPositionInfo &info)
QDataStream & operator>>(QDataStream &stream, QGeoPositionInfo::Attribute &attr)
QDataStream & operator>>(QDataStream &stream, QGeoPositionInfo &info)

Detailed Description

The QGeoPositionInfo class contains information gathered on a global position, direction and velocity at a particular point in time.

A QGeoPositionInfo contains, at a minimum, a geographical coordinate and a timestamp. It may also have heading and speed measurements as well as estimates of the accuracy of the provided data.

See also QGeoPositionInfoSource.

Member Type Documentation

enum QGeoPositionInfo::Attribute

Defines the attributes for positional information.

Constant Value Description
QGeoPositionInfo::Direction 0 The bearing measured in degrees clockwise from true north to the direction of travel.
QGeoPositionInfo::GroundSpeed 1 The ground speed, in meters/sec.
QGeoPositionInfo::VerticalSpeed 2 The vertical speed, in meters/sec.
QGeoPositionInfo::MagneticVariation 3 The angle between the horizontal component of the magnetic field and true north, in degrees. Also known as magnetic declination. A positive value indicates a clockwise direction from true north and a negative value indicates a counter-clockwise direction.
QGeoPositionInfo::HorizontalAccuracy 4 The accuracy of the provided latitude-longitude value, in meters.
QGeoPositionInfo::VerticalAccuracy 5 The accuracy of the provided altitude value, in meters.

Member Function Documentation


Creates an invalid QGeoPositionInfo object.

See also isValid().

QGeoPositionInfo::QGeoPositionInfo(const QGeoCoordinate &coordinate, const QDateTime &timestamp)

Creates a QGeoPositionInfo for the given coordinate and timestamp.

QGeoPositionInfo::QGeoPositionInfo(const QGeoPositionInfo &other)

Creates a QGeoPositionInfo with the values of other.

QGeoPositionInfo::QGeoPositionInfo(QGeoPositionInfoPrivate &dd)

Default constructs an instance of QGeoPositionInfo.


Destroys a QGeoPositionInfo object.

qreal QGeoPositionInfo::attribute(QGeoPositionInfo::Attribute attribute) const

Returns the value of the specified attribute as a qreal value.

Returns NaN if the value has not been set.

The function hasAttribute() should be used to determine whether or not a value has been set for an attribute.

See also hasAttribute() and setAttribute().

QGeoCoordinate QGeoPositionInfo::coordinate() const

Returns the coordinate for this position.

Returns an invalid coordinate if no coordinate has been set.

See also setCoordinate().

bool QGeoPositionInfo::hasAttribute(QGeoPositionInfo::Attribute attribute) const

Returns true if the specified attribute is present for this QGeoPositionInfo object.

bool QGeoPositionInfo::isValid() const

Returns true if the timestamp() and coordinate() values are both valid.

See also QGeoCoordinate::isValid() and QDateTime::isValid().

void QGeoPositionInfo::removeAttribute(QGeoPositionInfo::Attribute attribute)

Removes the specified attribute and its value.

void QGeoPositionInfo::setAttribute(QGeoPositionInfo::Attribute attribute, qreal value)

Sets the value for attribute to value.

See also attribute().

void QGeoPositionInfo::setCoordinate(const QGeoCoordinate &coordinate)

Sets the coordinate for this position to coordinate.

See also coordinate().

void QGeoPositionInfo::setTimestamp(const QDateTime &timestamp)

Sets the date and time at which this position was reported to timestamp.

The timestamp must be in UTC time.

See also timestamp().

QDateTime QGeoPositionInfo::timestamp() const

Returns the date and time at which this position was reported, in UTC time.

Returns an invalid QDateTime if no date/time value has been set.

See also setTimestamp().

bool QGeoPositionInfo::operator!=(const QGeoPositionInfo &other) const

Returns true if any of this object's values are not the same as those of other.

QGeoPositionInfo &QGeoPositionInfo::operator=(const QGeoPositionInfo &other)

Assigns the values from other to this QGeoPositionInfo.

bool QGeoPositionInfo::operator==(const QGeoPositionInfo &other) const

Returns true if all of this object's values are the same as those of other.

Related Non-Members

QDataStream &operator<<(QDataStream &stream, QGeoPositionInfo::Attribute attr)

Writes the given attr enumeration to the specified stream.

See also Serializing Qt Data Types.

QDataStream &operator<<(QDataStream &stream, const QGeoPositionInfo &info)

Writes the given info to the specified stream.

See also Serializing Qt Data Types.

QDataStream &operator>>(QDataStream &stream, QGeoPositionInfo::Attribute &attr)

Reads an attribute enumeration from the specified stream info the given attr.

See also Serializing Qt Data Types.

QDataStream &operator>>(QDataStream &stream, QGeoPositionInfo &info)

Reads a coordinate from the specified stream into the given info.

See also Serializing Qt Data Types.

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Licensed under the GNU Free Documentation License, Version 1.3.