QgsSpatialIndex Class Reference

#include <qgsspatialindex.h>

List of all members.

Public Member Functions
	QgsSpatialIndex ()
	create new spatial index that will be stored in memory
	~QgsSpatialIndex ()
	destructor finalizes work with spatial index
bool	insertFeature (QgsFeature &f)
	add feature to index
bool	deleteFeature (QgsFeature &f)
	remove feature from index
QList< QgsFeatureId >	intersects (QgsRectangle rect)
	returns features that intersect the specified rectangle
QList< QgsFeatureId >	nearestNeighbor (QgsPoint point, int neighbors)
	returns nearest neighbors (their count is specified by second parameter)
Protected Member Functions
SpatialIndex::Region	rectToRegion (QgsRectangle rect)
bool	featureInfo (QgsFeature &f, SpatialIndex::Region &r, QgsFeatureId &id)
Private Attributes
SpatialIndex::IStorageManager *	mStorageManager
	storage manager
SpatialIndex::StorageManager::IBuffer *	mStorage
	buffer for index data
SpatialIndex::ISpatialIndex *	mRTree
	R-tree containing spatial index.

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Detailed Description

Definition at line 41 of file qgsspatialindex.h.

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Constructor & Destructor Documentation

QgsSpatialIndex::QgsSpatialIndex

(

)

create new spatial index that will be stored in memory

create new spatial index that stores its data on disk constructor - creates R-tree

Definition at line 51 of file qgsspatialindex.cpp.

QgsSpatialIndex::~QgsSpatialIndex

(

)

destructor finalizes work with spatial index

Definition at line 75 of file qgsspatialindex.cpp.

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Member Function Documentation

bool QgsSpatialIndex::deleteFeature

(

QgsFeature &

f

)

remove feature from index

Definition at line 133 of file qgsspatialindex.cpp.

References FID_TO_NUMBER.

bool QgsSpatialIndex::featureInfo	(	QgsFeature &	f,
		SpatialIndex::Region &	r,
		QgsFeatureId &	id
	)		[protected]

Definition at line 92 of file qgsspatialindex.cpp.

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

bool QgsSpatialIndex::insertFeature

(

QgsFeature &

f

)

add feature to index

Definition at line 103 of file qgsspatialindex.cpp.

References FID_TO_NUMBER, and QgsDebugMsg.

Referenced by QgsPointDisplacementRenderer::createDisplacementGroups(), and QgsOverlayAnalyzer::intersection().

QList< QgsFeatureId > QgsSpatialIndex::intersects

(

QgsRectangle

rect

)

returns features that intersect the specified rectangle

Definition at line 144 of file qgsspatialindex.cpp.

Referenced by QgsPointDisplacementRenderer::createDisplacementGroups(), and QgsOverlayAnalyzer::intersectFeature().

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

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

Definition at line 156 of file qgsspatialindex.cpp.

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

Region QgsSpatialIndex::rectToRegion

(

QgsRectangle

rect

)

[protected]

Definition at line 82 of file qgsspatialindex.cpp.

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

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Member Data Documentation

SpatialIndex::ISpatialIndex* QgsSpatialIndex::mRTree [private]

R-tree containing spatial index.

Definition at line 95 of file qgsspatialindex.h.

SpatialIndex::StorageManager::IBuffer* QgsSpatialIndex::mStorage [private]

buffer for index data

Definition at line 92 of file qgsspatialindex.h.

SpatialIndex::IStorageManager* QgsSpatialIndex::mStorageManager [private]

storage manager

Definition at line 89 of file qgsspatialindex.h.

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

• src/core/qgsspatialindex.h
• src/core/qgsspatialindex.cpp