qgscoordinatetransform.h

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/***************************************************************************
               qgscoordinatetransform.h  - Coordinate Transforms
               ------------------------
    begin                : Dec 2004
    copyright            : (C) 2004 Tim Sutton
    email                : tim at linfiniti.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 QGSCOORDINATETRANSFORM_H
#define QGSCOORDINATETRANSFORM_H
 
#include <QExplicitlySharedDataPointer>
 
#include "qgsconfig.h"
#include "qgis_core.h"
#include "qgis_sip.h"
#include "qgscoordinatereferencesystem.h"
#include "qgscoordinatetransformcontext.h"
 
class QgsCoordinateTransformPrivate;
class QgsPointXY;
class QgsRectangle;
class QPolygonF;
class QgsProject;
 
class CORE_EXPORT QgsCoordinateTransform
{
 
  public:
 
    enum TransformDirection
    {
      ForwardTransform,     
      ReverseTransform      
    };
 
    QgsCoordinateTransform();
 
    explicit QgsCoordinateTransform( const QgsCoordinateReferenceSystem &source,
                                     const QgsCoordinateReferenceSystem &destination,
                                     const QgsCoordinateTransformContext &context );
 
    explicit QgsCoordinateTransform( const QgsCoordinateReferenceSystem &source,
                                     const QgsCoordinateReferenceSystem &destination,
                                     const QgsProject *project );
 
    explicit QgsCoordinateTransform( const QgsCoordinateReferenceSystem &source,
                                     const QgsCoordinateReferenceSystem &destination,
                                     int sourceDatumTransformId,
                                     int destinationDatumTransformId );
 
    QgsCoordinateTransform( const QgsCoordinateTransform &o );
 
    QgsCoordinateTransform &operator=( const QgsCoordinateTransform &o );
 
    ~QgsCoordinateTransform();
 
    bool isValid() const;
 
    void setSourceCrs( const QgsCoordinateReferenceSystem &crs );
 
    void setDestinationCrs( const QgsCoordinateReferenceSystem &crs );
 
    void setContext( const QgsCoordinateTransformContext &context );
 
    QgsCoordinateTransformContext context() const;
 
    QgsCoordinateReferenceSystem sourceCrs() const;
 
    QgsCoordinateReferenceSystem destinationCrs() const;
 
    QgsPointXY transform( const QgsPointXY &point, TransformDirection direction = ForwardTransform ) const SIP_THROW( QgsCsException );
 
    QgsPointXY transform( double x, double y, TransformDirection direction = ForwardTransform ) const;
 
    QgsRectangle transformBoundingBox( const QgsRectangle &rectangle, TransformDirection direction = ForwardTransform, bool handle180Crossover = false ) const SIP_THROW( QgsCsException );
 
    void transformInPlace( double &x, double &y, double &z, TransformDirection direction = ForwardTransform ) const SIP_THROW( QgsCsException );
 
    void transformInPlace( float &x, float &y, double &z, TransformDirection direction = ForwardTransform ) const SIP_SKIP;
 
    void transformInPlace( float &x, float &y, float &z, TransformDirection direction = ForwardTransform ) const SIP_SKIP;
 
    void transformInPlace( QVector<float> &x, QVector<float> &y, QVector<float> &z,
                           TransformDirection direction = ForwardTransform ) const SIP_SKIP;
 
    void transformInPlace( QVector<double> &x, QVector<double> &y, QVector<double> &z,
                           TransformDirection direction = ForwardTransform ) const SIP_SKIP;
 
    void transformPolygon( QPolygonF &polygon, TransformDirection direction = ForwardTransform ) const SIP_THROW( QgsCsException );
 
    QgsRectangle transform( const QgsRectangle &rectangle, TransformDirection direction = ForwardTransform ) const SIP_THROW( QgsCsException );
 
    void transformCoords( int numPoint, double *x, double *y, double *z, TransformDirection direction = ForwardTransform ) const SIP_THROW( QgsCsException );
 
    bool isShortCircuited() const;
 
    QString coordinateOperation() const;
 
    QgsDatumTransform::TransformDetails instantiatedCoordinateOperationDetails() const;
 
    void setCoordinateOperation( const QString &operation ) const;
 
    void setAllowFallbackTransforms( bool allowed );
 
    bool allowFallbackTransforms() const;
 
    void setBallparkTransformsAreAppropriate( bool appropriate );
 
    void disableFallbackOperationHandler( bool disabled );
 
    bool fallbackOperationOccurred() const;
 
    Q_DECL_DEPRECATED int sourceDatumTransformId() const SIP_DEPRECATED;
 
    Q_DECL_DEPRECATED void setSourceDatumTransformId( int datumId ) SIP_DEPRECATED;
 
    Q_DECL_DEPRECATED int destinationDatumTransformId() const SIP_DEPRECATED;
 
    Q_DECL_DEPRECATED void setDestinationDatumTransformId( int datumId ) SIP_DEPRECATED;
 
#ifndef SIP_RUN
 
    static void invalidateCache( bool disableCache = false );
#else
 
    static void invalidateCache( bool disableCache SIP_PYARGREMOVE = false );
#endif
 
    double scaleFactor( const QgsRectangle &referenceExtent ) const;
 
#ifdef SIP_RUN
    SIP_PYOBJECT __repr__();
    % MethodCode
    QString str = QStringLiteral( "<QgsCoordinateTransform: %1 to %2>" ).arg( sipCpp->sourceCrs().isValid() ? sipCpp->sourceCrs().authid() : QStringLiteral( "NULL" ),
                  sipCpp->destinationCrs().isValid() ? sipCpp->destinationCrs().authid() : QStringLiteral( "NULL" ) );
    sipRes = PyUnicode_FromString( str.toUtf8().constData() );
    % End
#endif
 
#ifndef SIP_RUN
 
    static void setCustomMissingRequiredGridHandler( const std::function< void( const QgsCoordinateReferenceSystem &sourceCrs,
        const QgsCoordinateReferenceSystem &destinationCrs,
        const QgsDatumTransform::GridDetails &grid )> &handler );
 
    static void setCustomMissingPreferredGridHandler( const std::function< void( const QgsCoordinateReferenceSystem &sourceCrs,
        const QgsCoordinateReferenceSystem &destinationCrs,
        const QgsDatumTransform::TransformDetails &preferredOperation,
        const QgsDatumTransform::TransformDetails &availableOperation )> &handler );
 
    static void setCustomCoordinateOperationCreationErrorHandler( const std::function< void( const QgsCoordinateReferenceSystem &sourceCrs,
        const QgsCoordinateReferenceSystem &destinationCrs,
        const QString &error )> &handler );
 
    static void setCustomMissingGridUsedByContextHandler( const std::function< void( const QgsCoordinateReferenceSystem &sourceCrs,
        const QgsCoordinateReferenceSystem &destinationCrs,
        const QgsDatumTransform::TransformDetails &desiredOperation )> &handler );
 
 
    static void setFallbackOperationOccurredHandler( const std::function< void( const QgsCoordinateReferenceSystem &sourceCrs,
        const QgsCoordinateReferenceSystem &destinationCrs,
        const QString &desiredOperation )> &handler );
 
#endif
 
#ifndef SIP_RUN
#if PROJ_VERSION_MAJOR>=6
  protected:
    friend class QgsProjContext;
 
    // Only meant to be called by QgsProjContext::~QgsProjContext()
    static void removeFromCacheObjectsBelongingToCurrentThread( void *pj_context );
#endif
#endif
  private:
 
    mutable QExplicitlySharedDataPointer<QgsCoordinateTransformPrivate> d;
 
    QgsCoordinateTransformContext mContext;
 
#ifdef QGISDEBUG
    bool mHasContext = false;
#endif
 
    mutable QString mLastError;
    bool mBallparkTransformsAreAppropriate = false;
    bool mDisableFallbackHandler = false;
    mutable bool mFallbackOperationOccurred = false;
 
#if PROJ_VERSION_MAJOR>=6
    bool setFromCache( const QgsCoordinateReferenceSystem &src,
                       const QgsCoordinateReferenceSystem &dest,
                       const QString &coordinateOperationProj, bool allowFallback );
#else
    bool setFromCache( const QgsCoordinateReferenceSystem &src,
                       const QgsCoordinateReferenceSystem &dest,
                       int srcDatumTransform,
                       int destDatumTransform );
#endif
    void addToCache();
 
    // cache
    static QReadWriteLock sCacheLock;
    static QMultiHash< QPair< QString, QString >, QgsCoordinateTransform > sTransforms; //same auth_id pairs might have different datum transformations
    static bool sDisableCache;
 
 
    static std::function< void( const QgsCoordinateReferenceSystem &sourceCrs,
                                const QgsCoordinateReferenceSystem &destinationCrs,
                                const QString &desiredOperation )> sFallbackOperationOccurredHandler;
 
};
 
#ifndef SIP_RUN
inline std::ostream &operator << ( std::ostream &os, const QgsCoordinateTransform &r )
{
  QString mySummary( QStringLiteral( "\n%%%%%%%%%%%%%%%%%%%%%%%%\nCoordinate Transform def begins:" ) );
  mySummary += QLatin1String( "\n\tInitialized? : " );
  //prevent warnings
  if ( r.isValid() )
  {
    //do nothing this is a dummy
  }
 
#if 0
  if ( r.isValid() )
  {
    mySummary += "Yes";
  }
  else
  {
    mySummary += "No";
  }
  mySummary += "\n\tShort Circuit?  : ";
  if ( r.isShortCircuited() )
  {
    mySummary += "Yes";
  }
  else
  {
    mySummary += "No";
  }
 
  mySummary += "\n\tSource Spatial Ref Sys  : ";
  if ( r.sourceCrs() )
  {
    mySummary << r.sourceCrs();
  }
  else
  {
    mySummary += "Undefined";
  }
 
  mySummary += "\n\tDest Spatial Ref Sys  : ";
  if ( r.destCRS() )
  {
    mySummary << r.destCRS();
  }
  else
  {
    mySummary += "Undefined";
  }
#endif
 
  mySummary += QLatin1String( "\nCoordinate Transform def ends \n%%%%%%%%%%%%%%%%%%%%%%%%\n" );
  return os << mySummary.toLocal8Bit().data() << std::endl;
}
#endif
 
 
#endif // QGSCOORDINATETRANSFORM_H