|
|
              
QGeoPositionInfo Class ReferenceThe QGeoPositionInfo class contains information gathered on a global position, direction and velocity at a particular point in time. More... #include <QGeoPositionInfo> Public Types
Public Functions
Related Non-Members
Detailed DescriptionThe 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
|
| Constant | Value | Description |
|---|---|---|
| QGeoPositionInfo::Direction | 0 | The bearing to true north from the direction of travel, in degrees. |
| QGeoPositionInfo::GroundSpeed | 1 | The ground speed, in metres/sec. |
| QGeoPositionInfo::VerticalSpeed | 2 | The vertical speed, in metres/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 metres. |
| QGeoPositionInfo::VerticalAccuracy | 5 | The accuracy of the provided altitude value, in metres. |
Member Function Documentation
QGeoPositionInfo::QGeoPositionInfo ()
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 ()
Destroys a QGeoPositionInfo object.
qreal QGeoPositionInfo::attribute ( Attribute attribute ) const
Returns the value of the specified attribute as a qreal value.
Returns -1 if the value has not been set, although this may also be a legitimate value for some attributes.
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 & 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, const QGeoPositionInfo & info )
Writes the given info to the specified stream.
See also Format of the QDataStream Operators.
QDataStream & operator>> ( QDataStream & stream, QGeoPositionInfo & info )
Reads a coordinate from the specified stream into the given info.
See also Format of the QDataStream Operators.