Part Class
A mutable collection of Segments that together define the shape of a part in a multipart geometry under construction. More...
| Header: | #include <Part> |
| Since: | Esri::ArcGISRuntime 100.0 |
| Inherits: | Object |
Public Functions
| Part(const SpatialReference &spatialReference, QObject *parent = nullptr) | |
| ~Part() | |
| int | addPoint(const Point &point) |
| int | addPoint(double x, double y) |
| int | addPoint(double x, double y, double z) |
| void | addPoints(const QList<Point> &points) |
| int | addSegment(const Segment &segment) |
| Point | endPoint() const |
| int | endPointIndexFromSegmentIndex(int segmentIndex) const |
| void | insertPoint(int pointIndex, const Point &point) |
| void | insertPoint(int pointIndex, double x, double y) |
| void | insertPoint(int pointIndex, double x, double y, double z) |
| void | insertSegment(int segmentIndex, const Segment &segment) |
| bool | isEmpty() const |
| Point | point(int pointIndex) const |
| int | pointCount() const |
| ImmutablePointCollection | points() const |
| void | removeAll() |
| void | removePoint(int pointIndex) |
| void | removeSegment(int segmentIndex) |
| Segment | segment(int segmentIndex) const |
| int | segmentCount() const |
| int | segmentIndexFromEndPointIndex(int pointIndex) const |
| void | segmentIndexFromPointIndex(int pointIndex, int &outStartPointSegmentIndex, int &outEndPointSegmentIndex) const |
| int | segmentIndexFromStartPointIndex(int pointIndex) const |
| void | setPoint(int pointIndex, const Point &point) |
| void | setSegment(int segmentIndex, const Segment &segment) |
| SpatialReference | spatialReference() const |
| Point | startPoint() const |
| int | startPointIndexFromSegmentIndex(int segmentIndex) const |
- 31 public functions inherited from QObject
Additional Inherited Members
- 1 property inherited from QObject
- 1 public slot inherited from QObject
- 1 signal inherited from Esri::ArcGISRuntime::Object
- 2 signals inherited from QObject
- 1 public variable inherited from QObject
- 10 static public members inherited from QObject
- 9 protected functions inherited from QObject
- 2 protected variables inherited from QObject
Detailed Description
A mutable collection of Segments that together define the shape of a part in a multipart geometry under construction.
This class is used in Polygon and Polyline constructors, and by the MultipartBuilder parts() method.
Use the inherited methods to define and change the shape of the geometry by adding, removing, or changing its segments. Additionally, the addPoint and removePoint point-based helper methods allow you to work with points that represent the vertices of the part, instead of working with segments.
The spatial reference of any geometry added to a part must match that of the part, or be unspecified (in which case the geometry is assumed to have the same SpatialReference as the part). Added geometries are not reprojected.
Member Function Documentation
Part::Part(const SpatialReference &spatialReference, QObject *parent = nullptr)
Constructor that takes a spatialReference and an optional parent.
Part::~Part()
Destructor.
int Part::addPoint(const Point &point)
Adds a new point to the end of the part.
A new line segment will be added to connect the new point to the previous point. The points in the part are the start and end points of segments. If this is the first point in an empty segment, a single closed segment is added using the same start and end point. Adding a second point will update this line segment to gain a distinct end point. Adding a third or more points will add new line segments.
Returns the index where the point was added or -1 on error.
int Part::addPoint(double x, double y)
Add a new point to the end of the part by specifying the point's x, and y coordinates.
A new line segment will be added to connect the new point to the previous point. The points in the part are the start and end points of segments. If this is the first point in an empty segment, a single closed segment is added using the same start and end point. Adding a second point will update this line segment to gain a distinct end point. Adding a third or more points will add new line segments.
Returns the index where the point was added or -1 on error.
int Part::addPoint(double x, double y, double z)
Adds a new point to the end of the part by specifying the point's x, y, and z coordinates.
A new line segment will be added to connect the new point to the previous point. The points in the part are the start and end points of segments. If this is the first point in an empty segment, a single closed segment is added using the same start and end point. Adding a second point will update this line segment to gain a distinct end point. Adding a third or more points will add new line segments.
void Part::addPoints(const QList<Point> &points)
Adds a list of points to the part.
This function was introduced in Esri::ArcGISRuntime 100.1.
int Part::addSegment(const Segment &segment)
A new segment is added to the end.
If the start point of the segment matches the previous end point, the segment will share this point. The count of points will increase by 1 if the segment connects, or 2 points if it is disconnected. A more efficient way to add LineSegments to a part is to use one of the addPoint methods. For example Part::addPoint.
Returns the index where the Segment was added or -1 on error.
Point Part::endPoint() const
Gets the end point of this part.
int Part::endPointIndexFromSegmentIndex(int segmentIndex) const
Gets the point index of the end point of the segment with the given segmentIndex.
Returns -1 on error or invalid index.
void Part::insertPoint(int pointIndex, const Point &point)
Inserts a point into the part at the specified pointIndex.
Line segments will be added to connect the point to adjacent segments. The point index can be equal to the point count and this is equivalent to adding a point to the end of the collection. The points in the part are the start and end points of segments. An existing segment connecting the point before or after the point index is removed. Inserting a new point will insert new line segments connecting the adjacent points.
void Part::insertPoint(int pointIndex, double x, double y)
Inserts a point specified by its x and y coordinates into the part at the specified pointIndex.
Line segments will be added to connect the point to adjacent segments. The point index can be equal to the point count and this is equivalent to adding a point to the end of the collection. The points in the part are the start and end points of segments. An existing segment connecting the point before or after the point index is removed. Inserting a new point will insert new line segments connecting the adjacent points.
void Part::insertPoint(int pointIndex, double x, double y, double z)
Inserts a point specified by its x, y, and z coordinates into the part at the specified pointIndex.
Line segments will be added to connect the point to adjacent segments. The point index can be equal to the point count and this is equivalent to adding a point to the end of the collection. The points in the part are the start and end points of segments. An existing segment connecting the point before or after the point index is removed. Inserting a new point will insert new line segments connecting the adjacent points.
void Part::insertSegment(int segmentIndex, const Segment &segment)
Inserts a segment at segmentIndex.
bool Part::isEmpty() const
Gets whether this Part is empty.
Returns true if the Part contains no segments or points.
Point Part::point(int pointIndex) const
Gets the point at pointIndex.
Returns an empty Point object if the index is not valid.
See also setPoint().
int Part::pointCount() const
Gets the number of points in this Part.
ImmutablePointCollection Part::points() const
Gets the points of the ImmutablePart as an ImmutablePointCollection.
void Part::removeAll()
Removes all the points and segments.
void Part::removePoint(int pointIndex)
Removes the point at pointIndex.
void Part::removeSegment(int segmentIndex)
Removes the segment at segmentIndex.
Segment Part::segment(int segmentIndex) const
Gets the Segment at segmentIndex.
Returns the Segment or an empty Segment if the index isn't valid.
See also setSegment().
int Part::segmentCount() const
Gets the segment count of the Part.
Returns the number of segments.
int Part::segmentIndexFromEndPointIndex(int pointIndex) const
Gets the index of the segment whose end point index is pointIndex.
Returns the segment point index or -1 on error or invalid index.
void Part::segmentIndexFromPointIndex(int pointIndex, int &outStartPointSegmentIndex, int &outEndPointSegmentIndex) const
Gets the segment start and end indices from the given pointIndex.
- outStartPointSegmentIndex - The index of the segment that begins at pointIndex.
- outEndPointSegmentIndex - The index of the segment that ends at pointIndex.
On error, the values will be set to -1.
int Part::segmentIndexFromStartPointIndex(int pointIndex) const
Gets the segment index from the start point index pointIndex.
Returns the segment point index or -1 on error or invalid index.
void Part::setPoint(int pointIndex, const Point &point)
Reassigns the point at pointIndex to point.
See also point().
void Part::setSegment(int segmentIndex, const Segment &segment)
Reassigns the segment at segmentIndex to segment.
See also segment().
SpatialReference Part::spatialReference() const
Gets the spatial reference of this Part.
Point Part::startPoint() const
Gets the start point of this part.
int Part::startPointIndexFromSegmentIndex(int segmentIndex) const
Gets the point index of the start point of the segment with the given segmentIndex.
Returns -1 on error or invalid index.