qgsspatialindex.h

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/***************************************************************************
    qgsspatialindex.h  - wrapper class for spatial index library
    ----------------------
    begin                : December 2006
    copyright            : (C) 2006 by Martin Dobias
    email                : wonder.sk at gmail dot com
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef QGSSPATIALINDEX_H
#define QGSSPATIALINDEX_H


#include "qgis_sip.h"

// forward declaration
namespace SpatialIndex SIP_SKIP
{
  class IStorageManager;
  class ISpatialIndex;
  class Region;
  class Point;

  namespace StorageManager
  {
    class IBuffer;
  }
}

class QgsFeedback;
class QgsFeature;
class QgsRectangle;
class QgsPointXY;

#include "qgis_core.h"
#include "qgis_sip.h"
#include <QList>
#include <QSharedDataPointer>

#include "qgsfeature.h"

class QgsSpatialIndexData;
class QgsFeatureIterator;
class QgsFeatureSource;

class CORE_EXPORT QgsSpatialIndex
{

  public:

    /* creation of spatial index */

    QgsSpatialIndex();

    explicit QgsSpatialIndex( const QgsFeatureIterator &fi, QgsFeedback *feedback = nullptr );

    explicit QgsSpatialIndex( const QgsFeatureSource &source, QgsFeedback *feedback = nullptr );

    QgsSpatialIndex( const QgsSpatialIndex &other );

    ~QgsSpatialIndex();

    QgsSpatialIndex &operator=( const QgsSpatialIndex &other );

    /* operations */

    bool insertFeature( const QgsFeature &feature );

    bool insertFeature( QgsFeatureId id, const QgsRectangle &bounds );

    bool deleteFeature( const QgsFeature &feature );


    /* queries */

    QList<QgsFeatureId> intersects( const QgsRectangle &rectangle ) const;

    QList<QgsFeatureId> nearestNeighbor( const QgsPointXY &point, int neighbors ) const;

    /* debugging */

    QAtomicInt SIP_PYALTERNATIVETYPE( int ) refs() const;

  private:

    static SpatialIndex::Region rectToRegion( const QgsRectangle &rect );

    static bool featureInfo( const QgsFeature &f, SpatialIndex::Region &r, QgsFeatureId &id ) SIP_SKIP;

    static bool featureInfo( const QgsFeature &f, QgsRectangle &rect, QgsFeatureId &id );

    friend class QgsFeatureIteratorDataStream; // for access to featureInfo()

  private:

    QSharedDataPointer<QgsSpatialIndexData> d;

};

#endif