Abstract base class for curved geometry type. More...

#include <qgscurvev2.h>

Inheritance diagram for QgsCurveV2:

Public Member Functions
	QgsCurveV2 ()

virtual	~QgsCurveV2 ()

virtual void	addToPainterPath (QPainterPath &path) const =0
	Adds a curve to a painter path. More...

virtual void	coordinateSequence (QList< QList< QList< QgsPointV2 > > > &coord) const override
	Retrieves the sequence of geometries, rings and nodes. More...

virtual QgsLineStringV2 *	curveToLine () const =0
	Returns a new line string geometry corresponding to a segmentized approximation of the curve. More...

virtual void	drawAsPolygon (QPainter &p) const =0
	Draws the curve as a polygon on the specified QPainter. More...

virtual QgsPointV2	endPoint () const =0
	Returns the end point of the curve. More...

virtual bool	isClosed () const
	Returns true if the curve is closed. More...

virtual bool	isRing () const
	Returns true if the curve is a ring. More...

virtual bool	nextVertex (QgsVertexId &id, QgsPointV2 &vertex) const override
	Returns next vertex id and coordinates. More...

virtual int	numPoints () const =0
	Returns the number of points in the curve. More...

virtual int	partCount () const override

virtual bool	pointAt (int i, QgsPointV2 &vertex, QgsVertexId::VertexType &type) const =0
	Returns the point and vertex id of a point within the curve. More...

virtual void	points (QList< QgsPointV2 > &pt) const =0
	Returns a list of points within the curve. More...

virtual int	ringCount (int=0) const override

QgsAbstractGeometryV2 *	segmentize () const override
	Returns a version of the geometry without curves. More...

virtual QgsPointV2	startPoint () const =0
	Returns the starting point of the curve. More...

virtual void	sumUpArea (double &sum) const =0
	Calculates the area of the curve. More...

virtual QgsPointV2	vertexAt (const QgsVertexId &id) const override
	Returns the point corresponding to a specified vertex id. More...

virtual int	vertexCount (int=0, int=0) const override

Public Member Functions inherited from QgsAbstractGeometryV2
	QgsAbstractGeometryV2 ()

	QgsAbstractGeometryV2 (const QgsAbstractGeometryV2 &geom)

virtual	~QgsAbstractGeometryV2 ()

virtual bool	addMValue (double mValue=0)=0
	Adds a measure to the geometry, initialized to a preset value. More...

virtual bool	addZValue (double zValue=0)=0
	Adds a z-dimension to the geometry, initialized to a preset value. More...

virtual double	area () const
	Returns the area of the geometry. More...

virtual QDomElement	asGML2 (QDomDocument &doc, int precision=17, const QString &ns="gml") const =0
	Returns a GML2 representation of the geometry. More...

virtual QDomElement	asGML3 (QDomDocument &doc, int precision=17, const QString &ns="gml") const =0
	Returns a GML3 representation of the geometry. More...

virtual QString	asJSON (int precision=17) const =0
	Returns a GeoJSON representation of the geometry. More...

virtual unsigned char *	asWkb (int &binarySize) const =0
	Returns a WKB representation of the geometry. More...

virtual QString	asWkt (int precision=17) const =0
	Returns a WKT representation of the geometry. More...

QgsRectangle	boundingBox () const
	Returns the minimal bounding box for the geometry. More...

virtual QgsRectangle	calculateBoundingBox () const
	Calculates the minimal bounding box for the geometry. More...

virtual QgsPointV2	centroid () const
	Returns the centroid of the geometry. More...

virtual void	clear ()=0
	Clears the geometry, ie reset it to a null geometry. More...

virtual QgsAbstractGeometryV2 *	clone () const =0
	Clones the geometry by performing a deep copy. More...

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. More...

virtual bool	deleteVertex (const QgsVertexId &position)=0
	Deletes a vertex within the geometry. More...

virtual int	dimension () const =0
	Returns the inherent dimension of the geometry. More...

virtual void	draw (QPainter &p) const =0
	Draws the geometry using the specified QPainter. More...

virtual bool	fromWkb (const unsigned char *wkb)=0
	Sets the geometry from a WKB string. More...

virtual bool	fromWkt (const QString &wkt)=0
	Sets the geometry from a WKT string. More...

virtual QString	geometryType () const =0
	Returns a unique string representing the geometry type. More...

virtual bool	hasCurvedSegments () const
	Returns true if the geometry contains curved segments. More...

virtual bool	insertVertex (const QgsVertexId &position, const QgsPointV2 &vertex)=0
	Inserts a vertex into the geometry. More...

bool	is3D () const
	Returns true if the geometry is 3D and contains a z-value. More...

bool	isEmpty () const
	Returns true if the geometry is empty. More...

bool	isMeasure () const
	Returns true if the geometry contains m values. More...

virtual double	length () const
	Returns the length of the geometry. More...

virtual bool	moveVertex (const QgsVertexId &position, const QgsPointV2 &newPos)=0
	Moves a vertex within the geometry. More...

int	nCoordinates () const
	Returns the number of nodes contained in the geometry. More...

virtual QgsAbstractGeometryV2 &	operator= (const QgsAbstractGeometryV2 &geom)

virtual double	perimeter () const
	Returns the perimeter of the geometry. More...

virtual void	transform (const QgsCoordinateTransform &ct, QgsCoordinateTransform::TransformDirection d=QgsCoordinateTransform::ForwardTransform)=0
	Transforms the geometry using a coordinate transform. More...

virtual void	transform (const QTransform &t)=0
	Transforms the geometry using a QTransform object. More...

virtual double	vertexAngle (const QgsVertexId &vertex) const =0
	Returns approximate rotation angle for a vertex. More...

virtual int	wkbSize () const =0
	Returns the size of the WKB representation of the geometry. More...

QgsWKBTypes::Type	wkbType () const
	Returns the WKB type of the geometry. More...

QString	wktTypeStr () const
	Returns the WKT type string of the geometry. More...

Additional Inherited Members
Protected Member Functions inherited from QgsAbstractGeometryV2
void	setZMTypeFromSubGeometry (const QgsAbstractGeometryV2 *subggeom, QgsWKBTypes::Type baseGeomType)
	Updates the geometry type based on whether sub geometries contain z or m values. More...

Static Protected Member Functions inherited from QgsAbstractGeometryV2
static bool	readWkbHeader (QgsConstWkbPtr &wkbPtr, QgsWKBTypes::Type &wkbType, bool &endianSwap, QgsWKBTypes::Type expectedType)
	Reads a WKB header and tests its validity. More...

Protected Attributes inherited from QgsAbstractGeometryV2
QgsRectangle	mBoundingBox

QgsWKBTypes::Type	mWkbType

Detailed Description

Abstract base class for curved geometry type.

Note: added in QGIS 2.10

Definition at line 32 of file qgscurvev2.h.

Constructor & Destructor Documentation

QgsCurveV2::QgsCurveV2 ( )

Definition at line 21 of file qgscurvev2.cpp.

QgsCurveV2::~QgsCurveV2 ( )

virtual

Definition at line 24 of file qgscurvev2.cpp.

Member Function Documentation

virtual void QgsCurveV2::addToPainterPath ( QPainterPath & path ) const

pure virtual

Adds a curve to a painter path.

Implemented in QgsCircularStringV2, QgsCompoundCurveV2, and QgsLineStringV2.

void QgsCurveV2::coordinateSequence ( QList< QList< QList< QgsPointV2 > > > & coord ) const

overridevirtual

Retrieves the sequence of geometries, rings and nodes.

Parameters

coord destination for coordinate sequence.

Implements QgsAbstractGeometryV2.

Definition at line 45 of file qgscurvev2.cpp.

virtual QgsLineStringV2* QgsCurveV2::curveToLine ( ) const

pure virtual

Returns a new line string geometry corresponding to a segmentized approximation of the curve.

Implemented in QgsCircularStringV2, QgsCompoundCurveV2, and QgsLineStringV2.

virtual void QgsCurveV2::drawAsPolygon ( QPainter & p ) const

pure virtual

Draws the curve as a polygon on the specified QPainter.

Parameters

p	destination QPainter

Implemented in QgsCircularStringV2, QgsCompoundCurveV2, and QgsLineStringV2.

virtual QgsPointV2 QgsCurveV2::endPoint ( ) const

pure virtual

Returns the end point of the curve.

See also: startPoint

Implemented in QgsCircularStringV2, QgsCompoundCurveV2, and QgsLineStringV2.

bool QgsCurveV2::isClosed ( ) const

virtual

Returns true if the curve is closed.

Definition at line 27 of file qgscurvev2.cpp.

bool QgsCurveV2::isRing ( ) const

virtual

Returns true if the curve is a ring.

Definition at line 40 of file qgscurvev2.cpp.

bool QgsCurveV2::nextVertex	(	QgsVertexId &	id,
		QgsPointV2 &	vertex
	)		const

overridevirtual

Returns next vertex id and coordinates.

Parameters

id	initial value should be the starting vertex id. The next vertex id will be stored in this variable if found.
vertex	container for found node

Returns: false if at end

Implements QgsAbstractGeometryV2.

Definition at line 55 of file qgscurvev2.cpp.

virtual int QgsCurveV2::numPoints ( ) const

pure virtual

Returns the number of points in the curve.

Implemented in QgsCompoundCurveV2, QgsLineStringV2, and QgsCircularStringV2.

virtual int QgsCurveV2::partCount ( ) const

inlineoverridevirtual

Implements QgsAbstractGeometryV2.

Definition at line 94 of file qgscurvev2.h.

virtual bool QgsCurveV2::pointAt	(	int	i,
		QgsPointV2 &	vertex,
		QgsVertexId::VertexType &	type
	)		const

pure virtual

Returns the point and vertex id of a point within the curve.

Implemented in QgsCircularStringV2, QgsCompoundCurveV2, and QgsLineStringV2.

virtual void QgsCurveV2::points ( QList< QgsPointV2 > & pt ) const

pure virtual

Returns a list of points within the curve.

Implemented in QgsCircularStringV2, QgsLineStringV2, and QgsCompoundCurveV2.

virtual int QgsCurveV2::ringCount ( int = 0 ) const

inlineoverridevirtual

Implements QgsAbstractGeometryV2.

Definition at line 93 of file qgscurvev2.h.

QgsAbstractGeometryV2 * QgsCurveV2::segmentize ( ) const

overridevirtual

Returns a version of the geometry without curves.

Caller takes ownership of the returned geometry.

Reimplemented from QgsAbstractGeometryV2.

Definition at line 80 of file qgscurvev2.cpp.

virtual QgsPointV2 QgsCurveV2::startPoint ( ) const

pure virtual

Returns the starting point of the curve.

See also: endPoint

Implemented in QgsCircularStringV2, QgsCompoundCurveV2, and QgsLineStringV2.

virtual void QgsCurveV2::sumUpArea ( double & sum ) const

pure virtual

Calculates the area of the curve.

Derived classes should override this to return the correct area of the curve.

Implemented in QgsCircularStringV2, QgsCompoundCurveV2, and QgsLineStringV2.

QgsPointV2 QgsCurveV2::vertexAt ( const QgsVertexId & id ) const

overridevirtual

Returns the point corresponding to a specified vertex id.

Implements QgsAbstractGeometryV2.

Definition at line 85 of file qgscurvev2.cpp.

virtual int QgsCurveV2::vertexCount	(	int	= `0`,
		int	= `0`
	)		const

inlineoverridevirtual

Implements QgsAbstractGeometryV2.

Definition at line 92 of file qgscurvev2.h.

The documentation for this class was generated from the following files:

/tmp/buildd/qgis-2.12.0+99unstable/src/core/geometry/qgscurvev2.h
/tmp/buildd/qgis-2.12.0+99unstable/src/core/geometry/qgscurvev2.cpp

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation