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qgslinestringv2.h
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1 /***************************************************************************
2  qgslinestringv2.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 QGSLINESTRINGV2_H
19 #define QGSLINESTRINGV2_H
20 
21 #include "qgscurvev2.h"
22 #include "qgswkbptr.h"
23 #include <QPolygonF>
24 
31 class CORE_EXPORT QgsLineStringV2: public QgsCurveV2
32 {
33  public:
35  ~QgsLineStringV2();
36 
37  virtual QString geometryType() const override { return "LineString"; }
38  virtual int dimension() const override { return 1; }
39  virtual QgsAbstractGeometryV2* clone() const override;
40  virtual void clear() override;
41 
42  virtual bool fromWkb( const unsigned char* wkb ) override;
43  void fromWkbPoints( QgsWKBTypes::Type type, const QgsConstWkbPtr& wkb );
44  virtual bool fromWkt( const QString& wkt ) override;
45 
46  int wkbSize() const override;
47  unsigned char* asWkb( int& binarySize ) const override;
48  QString asWkt( int precision = 17 ) const override;
49  QDomElement asGML2( QDomDocument& doc, int precision = 17, const QString& ns = "gml" ) const override;
50  QDomElement asGML3( QDomDocument& doc, int precision = 17, const QString& ns = "gml" ) const override;
51  QString asJSON( int precision = 17 ) const override;
52 
53  //curve interface
54  virtual double length() const override;
55  virtual QgsPointV2 startPoint() const override;
56  virtual QgsPointV2 endPoint() const override;
57  virtual QgsLineStringV2* curveToLine() const override;
58 
59  int numPoints() const override;
60  QgsPointV2 pointN( int i ) const;
61  void points( QList<QgsPointV2>& pt ) const override;
62 
63  void setPoints( const QList<QgsPointV2>& points );
64  void append( const QgsLineStringV2* line );
65 
66  void draw( QPainter& p ) const override;
67  void transform( const QgsCoordinateTransform& ct ) override;
68  void transform( const QTransform& t ) override;
69 
70  void addToPainterPath( QPainterPath& path ) const override;
71  void drawAsPolygon( QPainter& p ) const override;
72 
73  const QPolygonF& qPolygonF() const { return mCoords; }
74 
75  virtual bool insertVertex( const QgsVertexId& position, const QgsPointV2& vertex ) override;
76  virtual bool moveVertex( const QgsVertexId& position, const QgsPointV2& newPos ) override;
77  virtual bool deleteVertex( const QgsVertexId& position ) override;
78  void addVertex( const QgsPointV2& pt );
79 
80  double closestSegment( const QgsPointV2& pt, QgsPointV2& segmentPt, QgsVertexId& vertexAfter, bool* leftOf, double epsilon ) const override;
81  bool pointAt( int i, QgsPointV2& vertex, QgsVertexId::VertexType& type ) const override;
82 
83  void sumUpArea( double& sum ) const override;
84 
86  void close();
87 
88  private:
89  QPolygonF mCoords;
90  QVector<double> mZ;
91  QVector<double> mM;
92 
93  void importVerticesFromWkb( const QgsConstWkbPtr& wkb );
94 };
95 
96 #endif // QGSLINESTRINGV2_H
const QPolygonF & qPolygonF() const
virtual int dimension() const override
Returns the inherent dimension of the geometry.
virtual bool moveVertex(const QgsVertexId &position, const QgsPointV2 &newPos)=0
Moves a vertex within the geometry.
virtual double length() const
Returns the length (or perimeter for area geometries) of the geometry.
virtual void points(QList< QgsPointV2 > &pt) const =0
Returns a list of points within the curve.
virtual QString asJSON(int precision=17) const =0
Returns a GeoJSON representation of the geometry.
virtual void addToPainterPath(QPainterPath &path) const =0
Adds a curve to a painter path.
Abstract base class for all geometries.
virtual int wkbSize() const =0
Returns the size of the WKB representation of the geometry.
virtual bool insertVertex(const QgsVertexId &position, const QgsPointV2 &vertex)=0
Inserts a vertex into the geometry.
virtual void clear()=0
Clears the geometry, ie reset it to a null geometry.
virtual int numPoints() const =0
Returns the number of points in the curve.
virtual bool pointAt(int i, QgsPointV2 &vertex, QgsVertexId::VertexType &type) const =0
Returns the point and vertex id of a point within the curve.
Utility class for identifying a unique vertex within a geometry.
Line string geometry type.
virtual bool fromWkb(const unsigned char *wkb)=0
Sets the geometry from a WKB string.
Point geometry type.
Definition: qgspointv2.h:29
virtual unsigned char * asWkb(int &binarySize) const =0
Returns a WKB representation of the geometry.
virtual QString geometryType() const override
Returns a unique string representing the geometry type.
virtual QDomElement asGML3(QDomDocument &doc, int precision=17, const QString &ns="gml") const =0
Returns a GML3 representation of the geometry.
virtual bool fromWkt(const QString &wkt)=0
Sets the geometry from a WKT string.
virtual void sumUpArea(double &sum) const =0
Calculates the area of the curve.
virtual bool deleteVertex(const QgsVertexId &position)=0
Deletes a vertex within the geometry.
virtual QgsLineStringV2 * curveToLine() const =0
Returns a new line string geometry corresponding to a segmentized approximation of the curve...
virtual QgsPointV2 endPoint() const =0
Returns the end point of the curve.
virtual void transform(const QgsCoordinateTransform &ct)=0
Transforms the geometry using a coordinate transform.
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 QgsPointV2 startPoint() const =0
Returns the starting point of the curve.
virtual void draw(QPainter &p) const =0
Draws the geometry using the specified QPainter.
virtual void drawAsPolygon(QPainter &p) const =0
Draws the curve as a polygon on the specified QPainter.
double ANALYSIS_EXPORT leftOf(Point3D *thepoint, Point3D *p1, Point3D *p2)
Returns whether 'thepoint' is left or right of the line from 'p1' to 'p2'.
virtual QDomElement asGML2(QDomDocument &doc, int precision=17, const QString &ns="gml") const =0
Returns a GML2 representation 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 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.