The QGeoPolygon class defines a geographic polygon. 更多...
| 头： | #include <QGeoPolygon> |
| qmake: | QT += positioning |
| Since: | Qt 5.10 |
| 继承： | QGeoShape |
| QGeoPolygon () | |
| QGeoPolygon (const QList<QGeoCoordinate> & path ) | |
| QGeoPolygon (const QGeoPolygon & other ) | |
| QGeoPolygon (const QGeoShape & other ) | |
| ~QGeoPolygon () | |
| void | addCoordinate (const QGeoCoordinate & coordinate ) |
| void | addHole (const QVariant & holePath ) |
| void | addHole (const QList<QGeoCoordinate> & holePath ) |
| bool | containsCoordinate (const QGeoCoordinate & coordinate ) const |
| QGeoCoordinate | coordinateAt (int index ) const |
| const QVariantList | hole (int index ) const |
| const QList<QGeoCoordinate> | holePath (int index ) const |
| int | holesCount () const |
| void | insertCoordinate (int index , const QGeoCoordinate & coordinate ) |
| double | length (int indexFrom = 0, int indexTo = -1) const |
| const QList<QGeoCoordinate> & | path () const |
| void | removeCoordinate (const QGeoCoordinate & coordinate ) |
| void | removeCoordinate (int index ) |
| void | removeHole (int index ) |
| void | replaceCoordinate (int index , const QGeoCoordinate & coordinate ) |
| void | setPath (const QList<QGeoCoordinate> & path ) |
| int | size () const |
| QString | toString () const |
| void | translate (double degreesLatitude , double degreesLongitude ) |
| QGeoPolygon | translated (double degreesLatitude , double degreesLongitude ) const |
| bool | operator!= (const QGeoPolygon & other ) const |
| QGeoPolygon & | operator= (const QGeoPolygon & other ) |
| bool | operator== (const QGeoPolygon & other ) const |
| const QMetaObject | staticMetaObject |
| QVariantList | perimeter () const |
| void | setPerimeter (const QVariantList & path ) |
The QGeoPolygon class defines a geographic polygon.
The polygon is defined by an ordered list of QGeoCoordinates representing its perimeter.
Each two adjacent elements in this list are intended to be connected together by the shortest line segment of constant bearing passing through both elements. This type of connection can cross the date line in the longitudinal direction, but never crosses the poles.
This is relevant for the calculation of the bounding box returned by QGeoShape::boundingGeoRectangle () for this shape, which will have the latitude of the top left corner set to the maximum latitude in the path point set. Similarly, the latitude of the bottom right corner will be the minimum latitude in the path point set.
This class is a Q_GADGET . It can be directly used from C++ and QML .
Constructs a new, empty geo polygon.
Constructs a new geo polygon from a list of coordinates.
Constructs a new geo polygon from the contents of other .
Constructs a new geo polygon from the contents of other .
Destroys this polygon.
追加 coordinate to the polygon.
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
设置 path for a hole inside the polygon. The hole is a QVariant 包含 QList < QGeoCoordinate >.
该函数在 Qt 5.12 引入。
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
Overloaded method. Sets the path for a hole inside the polygon. The hole is a QList < QGeoCoordinate >.
该函数在 Qt 5.12 引入。
Returns true if the polygon's perimeter contains coordinate as one of the elements.
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
Returns the coordinate at index .
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
返回 QVariant 包含 QVariant 包含 QList < QGeoCoordinate > which represents the hole at index.
该函数在 Qt 5.12 引入。
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
返回 QList < QGeoCoordinate > which represents the hole at index .
该函数在 Qt 5.12 引入。
Returns the number of holes.
该函数在 Qt 5.12 引入。
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
插入 coordinate at the specified index .
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
Returns the length of the polygon's perimeter, in meters, from the element indexFrom to the element indexTo . The length is intended to be the sum of the shortest distances for each pair of adjacent points.
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
Returns all the elements of the polygon's boundary.
另请参阅 setPath ().
[protected]
QVariantList
QGeoPolygon::
perimeter
() const
Returns all the elements of the polygon's perimeter.
This function was introduced in QtPositioning 5.12.
另请参阅 setPerimeter ().
Removes the last occurrence of coordinate from the polygon.
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
Removes element at position index from the polygon.
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
Removes element at position index from the holes QList .
该函数在 Qt 5.12 引入。
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
Replaces the path element at the specified index with coordinate .
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
设置 polygon 's boundary from a list of coordinates.
另请参阅 path ().
[protected]
void
QGeoPolygon::
setPerimeter
(const
QVariantList
&
path
)
Sets all the elements of the polygon's perimeter.
This function was introduced in QtPositioning 5.12.
另请参阅 perimeter ().
Returns the number of elements in the polygon.
该函数在 Qt 5.10 引入。
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
Returns the geo polygon properties as a string.
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
Translates this geo polygon by degreesLatitude northwards and degreesLongitude eastwards.
Negative values of degreesLatitude and degreesLongitude correspond to southward and westward translation respectively.
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
Returns a copy of this geo polygon translated by degreesLatitude northwards and degreesLongitude eastwards.
Negative values of degreesLatitude and degreesLongitude correspond to southward and westward translation respectively.
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
另请参阅 translate ().
Returns whether this geo polygon is not equal to other .
赋值 other to this geo polygon and returns a reference to this geo polygon.
Returns whether this geo polygon is equal to other .