qgsgeometryvalidator.h

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/***************************************************************************
  qgsgeometryvalidator.h - geometry validation thread
  -------------------------------------------------------------------
Date                 : 03.01.2012
Copyright            : (C) 2012 by Juergen E. Fischer
email                : jef at norbit dot de
 ***************************************************************************
 *                                                                         *
 *   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 QGSGEOMETRYVALIDATOR_H
#define QGSGEOMETRYVALIDATOR_H
 
#include "qgis_core.h"
#include "qgis_sip.h"
#include "qgsgeometry.h"
 
#include <QThread>
 
class QgsCurvePolygon;

class CORE_EXPORT QgsGeometryValidator : public QThread
{
    Q_OBJECT
 
  public:
    QgsGeometryValidator( const QgsGeometry &geometry, QVector<QgsGeometry::Error> *errors = nullptr, Qgis::GeometryValidationEngine method = Qgis::GeometryValidationEngine::QgisInternal );
    ~QgsGeometryValidator() override;
 
    void run() override;
    void stop();

    static void validateGeometry( const QgsGeometry &geometry, QVector<QgsGeometry::Error> &errors SIP_OUT, Qgis::GeometryValidationEngine method = Qgis::GeometryValidationEngine::QgisInternal );

    static Qgis::GeometryValidationEngine defaultValidationEngine();
 
  signals:

    void errorFound( const QgsGeometry::Error &error );

    void validationFinished( const QString &summary );
 
  public slots:
    void addError( const QgsGeometry::Error & );
 
  private:
    void validatePolyline( int i, const QgsLineString *line, bool ring = false );
    void validatePolygon( int partIndex, const QgsCurvePolygon *polygon );
    void checkRingIntersections( int partIndex0, int ringIndex0, const QgsCurve *ring0, int partIndex1, int ringIndex1, const QgsCurve *ring1 );
    double distLine2Point( double px, double py, QgsVector v, double qX, double qY );
    bool intersectLines( double px, double py, QgsVector v, double qx, double qy, QgsVector w, double &sX, double &sY );
    bool ringInRing( const QgsCurve *inside, const QgsCurve *outside );
    bool pointInRing( const QgsCurve *ring, double pX, double pY );
 
    QgsGeometry mGeometry;
    QVector<QgsGeometry::Error> *mErrors;
    bool mStop = false;
    int mErrorCount = 0;
    Qgis::GeometryValidationEngine mMethod = Qgis::GeometryValidationEngine::QgisInternal;
};
 
#endif