QgsSpatialIndex Class Reference

#include <qgsspatialindex.h>

Public Member Functions
	QgsSpatialIndex ()
	constructor - creates R-tree More...
	QgsSpatialIndex (const QgsSpatialIndex &other)
	copy constructor More...
	~QgsSpatialIndex ()
	destructor finalizes work with spatial index More...
QgsSpatialIndex &	operator= (const QgsSpatialIndex &other)
	implement assignment operator More...
bool	insertFeature (const QgsFeature &f)
	add feature to index More...
bool	deleteFeature (const QgsFeature &f)
	remove feature from index More...
QList< QgsFeatureId >	intersects (QgsRectangle rect) const
	returns features that intersect the specified rectangle More...
QList< QgsFeatureId >	nearestNeighbor (QgsPoint point, int neighbors) const
	returns nearest neighbors (their count is specified by second parameter) More...
int	refs () const
	get reference count - just for debugging! More...

Protected Member Functions
bool	featureInfo (const QgsFeature &f, SpatialIndex::Region &r, QgsFeatureId &id)

Static Protected Member Functions
static SpatialIndex::Region	rectToRegion (QgsRectangle rect)

Private Attributes
QSharedDataPointer < QgsSpatialIndexData >	d

Detailed Description

Definition at line 44 of file qgsspatialindex.h.

Constructor & Destructor Documentation

QgsSpatialIndex::QgsSpatialIndex

(

)

constructor - creates R-tree

Definition at line 132 of file qgsspatialindex.cpp.

QgsSpatialIndex::QgsSpatialIndex

(

const QgsSpatialIndex &

other

)

copy constructor

Definition at line 137 of file qgsspatialindex.cpp.

QgsSpatialIndex::~QgsSpatialIndex

(

)

destructor finalizes work with spatial index

Definition at line 142 of file qgsspatialindex.cpp.

Member Function Documentation

bool QgsSpatialIndex::deleteFeature

(

const QgsFeature &

f

)

remove feature from index

Definition at line 206 of file qgsspatialindex.cpp.

References d, featureInfo(), and FID_TO_NUMBER.

bool QgsSpatialIndex::featureInfo ( const QgsFeature &  f, SpatialIndex::Region &  r, QgsFeatureId &  id  )

protected

Definition at line 163 of file qgsspatialindex.cpp.

References QgsGeometry::boundingBox(), QgsFeature::geometry(), QgsFeature::id(), and rectToRegion().

Referenced by deleteFeature(), and insertFeature().

bool QgsSpatialIndex::insertFeature

(

const QgsFeature &

f

)

add feature to index

Definition at line 175 of file qgsspatialindex.cpp.

References d, featureInfo(), FID_TO_NUMBER, and QgsDebugMsg.

Referenced by QgsPointSample::addSamplePoints(), QgsTransectSample::createSample(), QgsOverlayAnalyzer::intersection(), and QgsPointDisplacementRenderer::renderFeature().

QList< QgsFeatureId > QgsSpatialIndex::intersects

(

QgsRectangle

rect

)

const

returns features that intersect the specified rectangle

Definition at line 217 of file qgsspatialindex.cpp.

References d, and rectToRegion().

Referenced by QgsOverlayAnalyzer::intersectFeature(), QgsTransectSample::otherTransectWithinDistance(), and QgsPointDisplacementRenderer::renderFeature().

QList< QgsFeatureId > QgsSpatialIndex::nearestNeighbor	(	QgsPoint	point,
		int	neighbors
	)		const

returns nearest neighbors (their count is specified by second parameter)

Definition at line 229 of file qgsspatialindex.cpp.

References d, QgsPoint::x(), and QgsPoint::y().

Referenced by QgsPointSample::checkMinDistance().

QgsSpatialIndex & QgsSpatialIndex::operator=

(

const QgsSpatialIndex &

other

)

implement assignment operator

Definition at line 146 of file qgsspatialindex.cpp.

References d.

Region QgsSpatialIndex::rectToRegion ( QgsRectangle  rect )

staticprotected

Definition at line 153 of file qgsspatialindex.cpp.

References QgsRectangle::xMaximum(), QgsRectangle::xMinimum(), QgsRectangle::yMaximum(), and QgsRectangle::yMinimum().

Referenced by featureInfo(), and intersects().

int QgsSpatialIndex::refs

(

)

const

get reference count - just for debugging!

Definition at line 244 of file qgsspatialindex.cpp.

References d.

Member Data Documentation

QSharedDataPointer<QgsSpatialIndexData> QgsSpatialIndex::d

private

Definition at line 93 of file qgsspatialindex.h.

Referenced by deleteFeature(), insertFeature(), intersects(), nearestNeighbor(), operator=(), and refs().

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

• /tmp/buildd/qgis-2.4.0+unstable1/src/core/qgsspatialindex.h
• /tmp/buildd/qgis-2.4.0+unstable1/src/core/qgsspatialindex.cpp