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 |
This class was introduced in Qt 5.2.
Public Types
| enum | Attribute { Direction, GroundSpeed, VerticalSpeed, MagneticVariation, HorizontalAccuracy, VerticalAccuracy } |
Public Functions
| QGeoPositionInfo(const QGeoPositionInfo &other) | |
| QGeoPositionInfo(const QGeoCoordinate &coordinate, const QDateTime ×tamp) | |
| QGeoPositionInfo() | |
| QGeoPositionInfo & | operator=(const QGeoPositionInfo &other) |
| ~QGeoPositionInfo() | |
| qreal | attribute(Attribute attribute) const |
| QGeoCoordinate | coordinate() const |
| bool | hasAttribute(Attribute attribute) const |
| bool | isValid() const |
| void | removeAttribute(Attribute attribute) |
| void | setAttribute(Attribute attribute, qreal value) |
| void | setCoordinate(const QGeoCoordinate &coordinate) |
| void | setTimestamp(const QDateTime ×tamp) |
| QDateTime | timestamp() const |
| bool | operator!=(const QGeoPositionInfo &other) const |
| bool | operator==(const QGeoPositionInfo &other) const |
Related Non-Members
| 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
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
QGeoPositionInfo::QGeoPositionInfo(const QGeoPositionInfo &other)
Creates a QGeoPositionInfo with the values of other.
QGeoPositionInfo::QGeoPositionInfo(const QGeoCoordinate &coordinate, const QDateTime ×tamp)
Creates a QGeoPositionInfo for the given coordinate and timestamp.
QGeoPositionInfo::QGeoPositionInfo()
Creates an invalid QGeoPositionInfo object.
See also isValid().
QGeoPositionInfo &QGeoPositionInfo::operator=(const QGeoPositionInfo &other)
Assigns the values from other to this QGeoPositionInfo.
QGeoPositionInfo::~QGeoPositionInfo()
Destroys a QGeoPositionInfo object.
qreal QGeoPositionInfo::attribute(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(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(Attribute attribute)
Removes the specified attribute and its value.
void QGeoPositionInfo::setAttribute(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 ×tamp)
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.
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.