QGIS API Documentation  2.18.3-Las Palmas (77b8c3d)
qgscurvepolygonv2.h
Go to the documentation of this file.
1 /***************************************************************************
2  qgscurvepolygonv2.h
3  -------------------
4  begin : September 2014
5  copyright : (C) 2014 by Marco Hugentobler
6  email : marco at sourcepole dot ch
7  ***************************************************************************/
8 
9 /***************************************************************************
10  * *
11  * This program is free software; you can redistribute it and/or modify *
12  * it under the terms of the GNU General Public License as published by *
13  * the Free Software Foundation; either version 2 of the License, or *
14  * (at your option) any later version. *
15  * *
16  ***************************************************************************/
17 
18 #ifndef QGSCURVEPOLYGONV2_H
19 #define QGSCURVEPOLYGONV2_H
20 
21 #include "qgssurfacev2.h"
22 
23 class QgsPolygonV2;
24 
31 class CORE_EXPORT QgsCurvePolygonV2: public QgsSurfaceV2
32 {
33  public:
38 
39  virtual QString geometryType() const override { return "CurvePolygon"; }
40  virtual int dimension() const override { return 2; }
41  virtual QgsCurvePolygonV2* clone() const override;
42  void clear() override;
43 
44  virtual bool fromWkb( QgsConstWkbPtr wkb ) override;
45  virtual bool fromWkt( const QString& wkt ) override;
46 
47  int wkbSize() const override;
48  unsigned char* asWkb( int& binarySize ) const override;
49  QString asWkt( int precision = 17 ) const override;
50  QDomElement asGML2( QDomDocument& doc, int precision = 17, const QString& ns = "gml" ) const override;
51  QDomElement asGML3( QDomDocument& doc, int precision = 17, const QString& ns = "gml" ) const override;
52  QString asJSON( int precision = 17 ) const override;
53 
54  //surface interface
55  virtual double area() const override;
56  virtual double perimeter() const override;
57  QgsPolygonV2* surfaceToPolygon() const override;
58  virtual QgsAbstractGeometryV2* boundary() const override;
59 
60  //curve polygon interface
61  int numInteriorRings() const;
62  const QgsCurveV2* exteriorRing() const;
63  const QgsCurveV2* interiorRing( int i ) const;
68  virtual QgsPolygonV2* toPolygon( double tolerance = M_PI_2 / 90, SegmentationToleranceType toleranceType = MaximumAngle ) const;
69 
77  virtual void setExteriorRing( QgsCurveV2* ring );
78 
80  void setInteriorRings( const QList<QgsCurveV2*>& rings );
82  virtual void addInteriorRing( QgsCurveV2* ring );
84  bool removeInteriorRing( int nr );
85 
86  virtual void draw( QPainter& p ) const override;
88  bool transformZ = false ) override;
89  void transform( const QTransform& t ) override;
90 
91  virtual bool insertVertex( QgsVertexId position, const QgsPointV2& vertex ) override;
92  virtual bool moveVertex( QgsVertexId position, const QgsPointV2& newPos ) override;
93  virtual bool deleteVertex( QgsVertexId position ) override;
94 
95  virtual QgsCoordinateSequenceV2 coordinateSequence() const override;
96  virtual int nCoordinates() const override;
97  double closestSegment( const QgsPointV2& pt, QgsPointV2& segmentPt, QgsVertexId& vertexAfter, bool* leftOf, double epsilon ) const override;
98  bool nextVertex( QgsVertexId& id, QgsPointV2& vertex ) const override;
99 
100  bool hasCurvedSegments() const override;
104  QgsAbstractGeometryV2* segmentize( double tolerance = M_PI_2 / 90, SegmentationToleranceType toleranceType = MaximumAngle ) const override;
105 
110  double vertexAngle( QgsVertexId vertex ) const override;
111 
112  virtual int vertexCount( int /*part*/ = 0, int ring = 0 ) const override;
113  virtual int ringCount( int /*part*/ = 0 ) const override { return ( nullptr != mExteriorRing ) + mInteriorRings.size(); }
114  virtual int partCount() const override { return ringCount() > 0 ? 1 : 0; }
115  virtual QgsPointV2 vertexAt( QgsVertexId id ) const override;
116 
117  virtual bool addZValue( double zValue = 0 ) override;
118  virtual bool addMValue( double mValue = 0 ) override;
119  virtual bool dropZValue() override;
120  virtual bool dropMValue() override;
121 
122  protected:
123 
126 
127  virtual QgsRectangle calculateBoundingBox() const override;
128 };
129 
130 #endif // QGSCURVEPOLYGONV2_H
A rectangle specified with double values.
Definition: qgsrectangle.h:35
virtual bool dropMValue()=0
Drops any measure values which exist in the geometry.
virtual QgsPolygonV2 * surfaceToPolygon() const =0
virtual QgsCoordinateSequenceV2 coordinateSequence() const =0
Retrieves the sequence of geometries, rings and nodes.
virtual int dimension() const override
Returns the inherent dimension of the geometry.
virtual QgsAbstractGeometryV2 & operator=(const QgsAbstractGeometryV2 &geom)
SegmentationToleranceType
Segmentation tolerance as maximum angle or maximum difference between approximation and circle...
TransformDirection
Enum used to indicate the direction (forward or inverse) of the transform.
virtual QString asJSON(int precision=17) const =0
Returns a GeoJSON representation of the geometry.
Abstract base class for all geometries.
virtual bool dropZValue()=0
Drops any z-dimensions which exist in the geometry.
virtual int wkbSize() const =0
Returns the size of the WKB representation of the geometry.
virtual int nCoordinates() const
Returns the number of nodes contained in the geometry.
#define M_PI_2
Definition: util.cpp:45
virtual bool addMValue(double mValue=0)=0
Adds a measure to the geometry, initialized to a preset value.
virtual int partCount() const override
Returns count of parts contained in the geometry.
virtual void clear()=0
Clears the geometry, ie reset it to a null geometry.
Polygon geometry type.
Definition: qgspolygonv2.h:29
virtual QString geometryType() const override
Returns a unique string representing the geometry type.
Utility class for identifying a unique vertex within a geometry.
virtual QgsRectangle calculateBoundingBox() const
Default calculator for the minimal bounding box for the geometry.
virtual bool fromWkb(QgsConstWkbPtr wkb)=0
Sets the geometry from a WKB string.
Point geometry type, with support for z-dimension and m-values.
Definition: qgspointv2.h:34
virtual bool hasCurvedSegments() const
Returns true if the geometry contains curved segments.
virtual unsigned char * asWkb(int &binarySize) const =0
Returns a WKB representation of the geometry.
virtual bool addZValue(double zValue=0)=0
Adds a z-dimension to the geometry, initialized to a preset value.
virtual QDomElement asGML3(QDomDocument &doc, int precision=17, const QString &ns="gml") const =0
Returns a GML3 representation of the geometry.
virtual bool nextVertex(QgsVertexId &id, QgsPointV2 &vertex) const =0
Returns next vertex id and coordinates.
virtual bool fromWkt(const QString &wkt)=0
Sets the geometry from a WKT string.
virtual int ringCount(int=0) const override
virtual QgsAbstractGeometryV2 * boundary() const =0
Returns the closure of the combinatorial boundary of the geometry (ie the topological boundary of the...
virtual double vertexAngle(QgsVertexId vertex) const =0
Returns approximate angle at a vertex.
QList< QgsCurveV2 * > mInteriorRings
virtual bool deleteVertex(QgsVertexId position)=0
Deletes a vertex within the geometry.
virtual bool insertVertex(QgsVertexId position, const QgsPointV2 &vertex)=0
Inserts a vertex into the geometry.
virtual int vertexCount(int part=0, int ring=0) const =0
virtual int ringCount(int part=0) const =0
virtual double area() const
Returns the area of the geometry.
Class for doing transforms between two map coordinate systems.
virtual QString asWkt(int precision=17) const =0
Returns a WKT representation of the geometry.
virtual void draw(QPainter &p) const =0
Draws the geometry using the specified QPainter.
double ANALYSIS_EXPORT leftOf(Point3D *thepoint, Point3D *p1, Point3D *p2)
Returns whether &#39;thepoint&#39; is left or right of the line from &#39;p1&#39; to &#39;p2&#39;.
Curve polygon geometry type.
virtual QDomElement asGML2(QDomDocument &doc, int precision=17, const QString &ns="gml") const =0
Returns a GML2 representation of the geometry.
virtual double perimeter() const
Returns the perimeter of the geometry.
virtual QgsAbstractGeometryV2 * clone() const =0
Clones the geometry by performing a deep copy.
Abstract base class for curved geometry type.
Definition: qgscurvev2.h:32
virtual bool moveVertex(QgsVertexId position, const QgsPointV2 &newPos)=0
Moves a vertex within the geometry.
virtual double closestSegment(const QgsPointV2 &pt, QgsPointV2 &segmentPt, QgsVertexId &vertexAfter, bool *leftOf, double epsilon) const =0
Searches for the closest segment of the geometry to a given point.
virtual QgsAbstractGeometryV2 * segmentize(double tolerance=M_PI/180., SegmentationToleranceType toleranceType=MaximumAngle) const
Returns a version of the geometry without curves.
virtual void transform(const QgsCoordinateTransform &ct, QgsCoordinateTransform::TransformDirection d=QgsCoordinateTransform::ForwardTransform, bool transformZ=false)=0
Transforms the geometry using a coordinate transform.
virtual QgsPointV2 vertexAt(QgsVertexId id) const =0
Returns the point corresponding to a specified vertex id.
QgsCurveV2 * mExteriorRing