The QGeoPath class defines a geographic path. 更多...
| 头： | #include <QGeoPath> |
| qmake: | QT += positioning |
| Since: | Qt 5.9 |
| 继承： | QGeoShape |
| QGeoPath () | |
| QGeoPath (const QList<QGeoCoordinate> & path , const qreal & width = 0.0) | |
| QGeoPath (const QGeoPath & other ) | |
| QGeoPath (const QGeoShape & other ) | |
| ~QGeoPath () | |
| void | addCoordinate (const QGeoCoordinate & coordinate ) |
| bool | containsCoordinate (const QGeoCoordinate & coordinate ) const |
| QGeoCoordinate | coordinateAt (int index ) 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 | replaceCoordinate (int index , const QGeoCoordinate & coordinate ) |
| void | setPath (const QList<QGeoCoordinate> & path ) |
| void | setWidth (const qreal & width ) |
| QString | toString () const |
| void | translate (double degreesLatitude , double degreesLongitude ) |
| QGeoPath | translated (double degreesLatitude , double degreesLongitude ) const |
| qreal | width () const |
| bool | operator!= (const QGeoPath & other ) const |
| QGeoPath & | operator= (const QGeoPath & other ) |
| bool | operator== (const QGeoPath & other ) const |
The QGeoPath class defines a geographic path.
The path is defined by an ordered list of QGeoCoordinates.
Each two adjacent elements in the path 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 dateline 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 .
This property holds the list of coordinates for the geo path.
The path is both invalid and empty if it contains no coordinate.
A default constructed QGeoPath is therefore invalid.
访问函数：
| const QList<QGeoCoordinate> & | path () const |
| void | setPath (const QList<QGeoCoordinate> & path ) |
访问函数：
| qreal | width () const |
| void | setWidth (const qreal & width ) |
Constructs a new, empty geo path.
Constructs a new geo path from a list of coordinates ( path and width ).
Constructs a new geo path from the contents of other .
Constructs a new geo path from the contents of other .
Destroys this path.
追加 coordinate to the path.
Returns true if the path contains coordinate as one of the elements.
Returns the coordinate at index .
插入 coordinate at the specified index .
Returns the length of the path, 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.
Returns all the elements. Equivalent to QGeoShape::center (). The center coordinate, in case of a QGeoPath , is the center of its bounding box.
注意： Getter 函数对于特性 path .
另请参阅 setPath ().
Removes the last occurrence of coordinate from the path.
Removes element at position index from the path.
Replaces the path element at the specified index with coordinate .
Returns the geo path properties as a string.
Translates this geo path by degreesLatitude northwards and degreesLongitude eastwards.
Negative values of degreesLatitude and degreesLongitude correspond to southward and westward translation respectively.
Returns a copy of this geo path translated by degreesLatitude northwards and degreesLongitude eastwards.
Negative values of degreesLatitude and degreesLongitude correspond to southward and westward translation respectively.
另请参阅 translate ().
Returns the width of the path, in meters. This information is used in the contains method The default value is 0.
注意： Getter 函数对于特性 width .
另请参阅 setWidth ().
Returns whether this geo path is not equal to other .
赋值 other to this geo path and returns a reference to this geo path.
Returns whether this geo path is equal to other .
