QGeoCircle Class
The QGeoCircle class defines a circular geographic area. More...
| Header: | #include <QGeoCircle> |
| qmake: | QT += positioning |
| Since: | Qt 5.2 |
| Inherits: | QGeoShape |
This class was introduced in Qt 5.2.
Properties
Public Functions
| QGeoCircle(const QGeoShape &other) | |
| QGeoCircle(const QGeoCircle &other) | |
| QGeoCircle(const QGeoCoordinate ¢er, qreal radius = -1.0) | |
| QGeoCircle() | |
| QGeoCircle & | operator=(const QGeoCircle &other) |
| ~QGeoCircle() | |
| QGeoCoordinate | center() const |
| void | extendCircle(const QGeoCoordinate &coordinate) |
| qreal | radius() const |
| void | setCenter(const QGeoCoordinate ¢er) |
| void | setRadius(qreal radius) |
| QString | toString() const |
| void | translate(double degreesLatitude, double degreesLongitude) |
| QGeoCircle | translated(double degreesLatitude, double degreesLongitude) const |
| bool | operator!=(const QGeoCircle &other) const |
| bool | operator==(const QGeoCircle &other) const |
Detailed Description
The circle is defined in terms of a QGeoCoordinate which specifies the center of the circle and a qreal which specifies the radius of the circle in meters.
The circle is considered invalid if the center coordinate is invalid or if the radius is less than zero.
This class is a Q_GADGET since Qt 5.5. It can be directly used from C++ and QML.
Property Documentation
center : QGeoCoordinate
This property holds the center coordinate for the geo circle.
The circle is considered invalid if this property contains an invalid coordinate.
A default constructed QGeoCircle uses an invalid QGeoCoordinate as center.
While this property is introduced in Qt 5.5, the related accessor functions exist since the first version of this class.
This property was introduced in Qt 5.5.
Access functions:
radius : qreal
This property holds the circle radius in meters.
The circle is considered invalid if this property is negative.
By default, the radius is initialized with -1.
While this property is introduced in Qt 5.5, the related accessor functions exist since the first version of this class.
This property was introduced in Qt 5.5.
Access functions:
Member Function Documentation
QGeoCircle::QGeoCircle(const QGeoShape &other)
Constructs a new geo circle from the contents of other.
QGeoCircle::QGeoCircle(const QGeoCircle &other)
Constructs a new geo circle from the contents of other.
QGeoCircle::QGeoCircle(const QGeoCoordinate ¢er, qreal radius = -1.0)
Constructs a new geo circle centered at center and with a radius of radius meters.
QGeoCircle::QGeoCircle()
Constructs a new, invalid geo circle.
QGeoCircle &QGeoCircle::operator=(const QGeoCircle &other)
Assigns other to this geo circle and returns a reference to this geo circle.
QGeoCircle::~QGeoCircle()
Destroys this geo circle.
QGeoCoordinate QGeoCircle::center() const
Returns the center coordinate of this geo circle. Equivalent to QGeoShape::center().
Note: Getter function for property center.
See also setCenter().
void QGeoCircle::extendCircle(const QGeoCoordinate &coordinate)
Extends the geo circle to also cover the coordinate coordinate
Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.
This function was introduced in Qt 5.9.
qreal QGeoCircle::radius() const
Returns the radius in meters of this geo circle.
Note: Getter function for property radius.
See also setRadius().
void QGeoCircle::setCenter(const QGeoCoordinate ¢er)
Sets the center coordinate of this geo circle to center.
Note: Setter function for property center.
See also center().
void QGeoCircle::setRadius(qreal radius)
Sets the radius in meters of this geo circle to radius.
Note: Setter function for property radius.
See also radius().
QString QGeoCircle::toString() const
Returns the geo circle properties as a string.
Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.
This function was introduced in Qt 5.5.
void QGeoCircle::translate(double degreesLatitude, double degreesLongitude)
Translates this geo circle by degreesLatitude northwards and degreesLongitude eastwards.
Negative values of degreesLatitude and degreesLongitude correspond to southward and westward translation respectively.
Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.
QGeoCircle QGeoCircle::translated(double degreesLatitude, double degreesLongitude) const
Returns a copy of this geo circle translated by degreesLatitude northwards and degreesLongitude eastwards.
Negative values of degreesLatitude and degreesLongitude correspond to southward and westward translation respectively.
Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.
See also translate().
bool QGeoCircle::operator!=(const QGeoCircle &other) const
Returns whether this geo circle is not equal to other.
bool QGeoCircle::operator==(const QGeoCircle &other) const
Returns whether this geo circle is equal to other.