Quantum GIS API Documentation  1.8
src/core/qgsgeometryvalidator.h
Go to the documentation of this file.
00001 /***************************************************************************
00002   qgsgeometryvalidator.h - geometry validation thread
00003   -------------------------------------------------------------------
00004 Date                 : 03.01.2012
00005 Copyright            : (C) 2012 by Juergen E. Fischer
00006 email                : jef at norbit dot de
00007  ***************************************************************************
00008  *                                                                         *
00009  *   This program is free software; you can redistribute it and/or modify  *
00010  *   it under the terms of the GNU General Public License as published by  *
00011  *   the Free Software Foundation; either version 2 of the License, or     *
00012  *   (at your option) any later version.                                   *
00013  *                                                                         *
00014  ***************************************************************************/
00015 
00016 #ifndef QGSGEOMETRYVALIDATOR_H
00017 #define QGSGEOMETRYVALIDATOR_H
00018 
00019 #include <QThread>
00020 #include "qgsgeometry.h"
00021 
00022 class CORE_EXPORT QgsGeometryValidator : public QThread
00023 {
00024     Q_OBJECT;
00025 
00026   public:
00028     QgsGeometryValidator( QgsGeometry *g, QList<QgsGeometry::Error> *errors = 0 );
00029     ~QgsGeometryValidator();
00030 
00031     void run();
00032     void stop();
00033 
00037     static void validateGeometry( QgsGeometry *g, QList<QgsGeometry::Error> &errors );
00038 
00039   signals:
00040     void errorFound( QgsGeometry::Error );
00041 
00042   public slots:
00043     void addError( QgsGeometry::Error );
00044 
00045   private:
00046     void validatePolyline( int i, QgsPolyline polyline, bool ring = false );
00047     void validatePolygon( int i, const QgsPolygon &polygon );
00048     void checkRingIntersections( int p0, int i0, const QgsPolyline &ring0, int p1, int i1, const QgsPolyline &ring1 );
00049     double distLine2Point( QgsPoint p, QgsVector v, QgsPoint q );
00050     bool intersectLines( QgsPoint p, QgsVector v, QgsPoint q, QgsVector w, QgsPoint &s );
00051     bool ringInRing( const QgsPolyline &inside, const QgsPolyline &outside );
00052     bool pointInRing( const QgsPolyline &ring, const QgsPoint &p );
00053 
00054     QgsGeometry mG;
00055     QList<QgsGeometry::Error> *mErrors;
00056     bool mStop;
00057     int mErrorCount;
00058 }; // class QgsGeometryValidator
00059 
00060 #endif
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Defines