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qgsfeature.cpp
1661 lines (1568 loc) · 41.4 KB
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qgsfeature.cpp
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/***************************************************************************
qgsfeature.cpp - Spatial Feature Implementation
--------------------------------------
Date : 09-Sep-2003
Copyright : (C) 2003 by Gary E.Sherman
email : sherman at mrcc.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. *
* *
***************************************************************************/
/* $Id$ */
#include "qgsfeature.h"
#include "qgsrect.h"
#include <iostream>
#include <cfloat>
#ifdef WIN32
#include <limits>
#endif
#include <cstring>
#include <assert.h>
/** \class QgsFeature
* \brief Encapsulates a spatial feature with attributes
*/
//! Constructor
QgsFeature::QgsFeature()
: mFid(0),
mGeometry(0),
mOwnsGeometry(0),
mValid(false),
mDirty(0)
{
// NOOP
}
QgsFeature::QgsFeature(int id, QString const & typeName )
: mFid(id),
mGeometry(0),
mOwnsGeometry(0),
mValid(false),
mDirty(0),
mTypeName(typeName)
{
// NOOP
}
QgsFeature::QgsFeature( QgsFeature const & rhs,
std::map<int,std::map<QString,QString> > & changedAttributes,
std::map<int, QgsGeometry> & changedGeometries )
: mFid( rhs.mFid ),
fieldNames( rhs.fieldNames ),
mValid( rhs.mValid ),
mDirty( rhs.mDirty ),
mTypeName( rhs.mTypeName )
{
// Copy the attributes over.
if ( changedAttributes.find(mFid) == changedAttributes.end() )
{
// copy attributes purely from rhs feature
attributes = rhs.attributes;
}
else
{
attributes.clear();
// TODO copy attributes from rhs feature with override from changedAttributes
for (std::vector<QgsFeatureAttribute>::iterator iter = attributes.begin();
iter != attributes.end();
++iter)
{
// See if we have a changed attribute for this field
if (
changedAttributes[mFid].find( iter->fieldName() ) ==
changedAttributes[mFid].end()
)
{
// No, copy from rhs feature
attributes.push_back(changedAttributes[mFid][ iter->fieldName() ]);
}
else
{
// Yes, copy from changedAttributes
attributes.push_back(QgsFeatureAttribute(iter->fieldName(),
changedAttributes[mFid][ iter->fieldName() ]
));
}
}
}
// Copy the geometry over
if ( changedGeometries.find(mFid) == changedGeometries.end() )
{
// copy geometry purely from rhs feature
if ( rhs.mGeometry )
{
mGeometry = new QgsGeometry( *(rhs.mGeometry) );
mOwnsGeometry = TRUE;
}
else
{
mGeometry = 0;
mOwnsGeometry = FALSE;
}
}
else
{
// deep-copy geometry purely from changedGeometries
mGeometry = new QgsGeometry(changedGeometries[mFid]);
mOwnsGeometry = TRUE;
}
}
QgsFeature::QgsFeature( QgsFeature const & rhs )
: mFid( rhs.mFid ),
attributes( rhs.attributes ),
fieldNames( rhs.fieldNames ),
mValid( rhs.mValid ),
mDirty( rhs.mDirty ),
mTypeName( rhs.mTypeName )
{
// copy embedded geometry
if ( rhs.mGeometry )
{
mGeometry = new QgsGeometry( *(rhs.mGeometry) );
mOwnsGeometry = TRUE;
}
else
{
mGeometry = 0;
mOwnsGeometry = FALSE;
}
}
QgsFeature & QgsFeature::operator=( QgsFeature const & rhs )
{
if ( &rhs == this )
{ return *this; }
mFid = rhs.mFid ;
mDirty = rhs.mDirty ;
attributes = rhs.attributes ;
fieldNames = rhs.fieldNames ;
mValid = rhs.mValid ;
mTypeName = rhs.mTypeName;
// copy embedded geometry
if ( rhs.mGeometry )
{
mGeometry = new QgsGeometry( *(rhs.mGeometry) );
mOwnsGeometry = TRUE;
}
else
{
mGeometry = 0;
mOwnsGeometry = FALSE;
}
return *this;
} // QgsFeature::operator=( QgsFeature const & rhs )
//! Destructor
QgsFeature::~QgsFeature()
{
// Destruct the attached geometry only if we still own it.
if ( (mOwnsGeometry) && (mGeometry) )
{
delete mGeometry;
}
}
/**
* Get the feature id for this feature
* @return Feature id
*/
int QgsFeature::featureId() const
{
return mFid;
}
/**
* Get the attributes for this feature.
* @return A std::map containing the field name/value mapping
*/
const std::vector < QgsFeatureAttribute > &QgsFeature::attributeMap()
{
#ifdef QGISDEBUG
// std::cout << "QgsFeature::attributeMap: Returning attributes"
// << "." << std::endl;
#endif
return attributes;
}
/**
* Add an attribute to the map
*/
void QgsFeature::addAttribute(QString const& field, QString const & value, bool numeric)
{
attributes.push_back(QgsFeatureAttribute(field, value, numeric));
}
/**Deletes an attribute and its value*/
void QgsFeature::deleteAttribute(const QString& name)
{
for(std::vector<QgsFeatureAttribute>::iterator iter=attributes.begin();iter!=attributes.end();++iter)
{
if(iter->fieldName()==name)
{
attributes.erase(iter);
break;
}
}
}
/**Changes an existing attribute value
@param name attribute name
@param newval new value*/
void QgsFeature::changeAttributeValue(const QString& name, const QString& newval)
{
for(std::vector<QgsFeatureAttribute>::iterator iter=attributes.begin();iter!=attributes.end();++iter)
{
if(iter->fieldName()==name)
{
iter->setFieldValue(newval);
break;
}
}
}
void QgsFeature::changeAttributeName(const QString& name, const QString& newname)
{
// TODO: This was added for Paste Transformations, but as this is called per transfer,
// per feature pasted, this can get inefficient. It may be worth calculating once per
// paste action and caching for each subsequent feature in that paste action.
for(std::vector<QgsFeatureAttribute>::iterator iter=attributes.begin();iter!=attributes.end();++iter)
{
if(iter->fieldName()==name)
{
iter->setFieldName(newname);
break;
}
}
}
/**
* Get the fields for this feature
* @return A std::map containing field position (index) and field name
*/
const std::map < int, QString > &QgsFeature::fields()
{
#ifdef QGISDEBUG
std::cout << "QgsFeature::fields: Returning fieldNames." << std::endl;
#endif
return fieldNames;
}
QgsGeometry * QgsFeature::geometry()
{
return mGeometry;
}
QgsGeometry * QgsFeature::geometryAndOwnership()
{
mOwnsGeometry = FALSE;
return mGeometry;
}
unsigned char * QgsFeature::getGeometry() const
{
return mGeometry->wkbBuffer();
/*#ifdef QGISDEBUG
std::cout << "QgsFeature::getGeometry: mDirty is " << mDirty
<< ", feature address:" << this << "." << std::endl;
#endif
if (mDirty)
{
#ifdef QGISDEBUG
std::cout << "QgsFeature::getGeometry: getting modified geometry for " << featureId() << "." << std::endl;
#endif
return modifiedGeometry;
}
else
{
#ifdef QGISDEBUG
std::cout << "QgsFeature::getGeometry: getting committed geometry for " << featureId() << "." << std::endl;
#endif
return geometry;
} */
}
/*
unsigned char * QgsFeature::getCommittedGeometry() const
{
// TODO: Store modifiedGeometry per-edit.
// Otherwise we may have memory problems with very large geometries
// as we currently have to keep a full copy of both geometries in memory
#ifdef QGISDEBUG
std::cout << "QgsFeature::getCommittedGeometry: doing for " << featureId() << "." << std::endl;
#endif
return geometry;
}
unsigned char * QgsFeature::getModifiedGeometry() const
{
// TODO: Store modifiedGeometry per-edit.
// Otherwise we may have memory problems with very large geometries
// as we currently have to keep a full copy of both geometries in memory
#ifdef QGISDEBUG
std::cout << "QgsFeature::getCommittedGeometry: doing for " << featureId() << "." << std::endl;
#endif
return modifiedGeometry;
}*/
size_t QgsFeature::getGeometrySize() const
{
if (mGeometry)
{
return mGeometry->wkbSize();
}
else
{
return 0;
}
}
/*
size_t QgsFeature::getCommittedGeometrySize() const
{
return geometrySize;
}
size_t QgsFeature::getModifiedGeometrySize() const
{
return modifiedGeometrySize;
}
*/
/**
* Return well known text representation of this feature
*/
QString const & QgsFeature::wellKnownText() const
{
if (mGeometry)
{
return mGeometry->wkt();
}
else
{
static QString emptyString("");
return emptyString; // TODO: Test for mGeometry in all functions of this class
}
/*
if(mWKT.isNull())
{
exportToWKT();
}
return mWKT;*/
}
/** Set the feature id
*/
void QgsFeature::setFeatureId(int id)
{
mFid = id;
}
QString const & QgsFeature::typeName() const
{
return mTypeName;
} // QgsFeature::typeName
/** sets the feature's type name
*/
void QgsFeature::typeName( QString const & typeName )
{
mTypeName = typeName;
} // QgsFeature::typeName
void QgsFeature::setGeometry(QgsGeometry& geom)
{
// Destruct the attached geometry only if we still own it, before assigning new one.
if ( (mOwnsGeometry) && (mGeometry) )
{
delete mGeometry;
mGeometry = 0;
}
mGeometry = new QgsGeometry(geom);
mOwnsGeometry = TRUE;
}
/** Set the pointer to the feature geometry
*/
void QgsFeature::setGeometryAndOwnership(unsigned char *geom, size_t length)
{
// Destruct the attached geometry only if we still own it, before assigning new one.
if ( (mOwnsGeometry) && (mGeometry) )
{
delete mGeometry;
mGeometry = 0;
}
mGeometry = new QgsGeometry();
mGeometry->setWkbAndOwnership(geom, length);
mOwnsGeometry = TRUE;
}
// /** Set the pointer to the modified feature geometry
// */
// void QgsFeature::setModifiedGeometry(unsigned char *geom, size_t length)
// {
// // delete any existing WKB geometry before assigning new one
// if ( modifiedGeometry )
// {
// delete [] modifiedGeometry;
// }
//
// #ifdef QGISDEBUG
// std::cout << "QgsFeature::setModifiedGeometry: setting modified geometry for " << featureId() << "." << std::endl;
// #endif
//
// modifiedGeometry = geom;
// modifiedGeometrySize = length;
// mDirty = TRUE;
//
// #ifdef QGISDEBUG
// std::cout << "QgsFeature::setModifiedGeometry: modifiedGeometrySize = " << modifiedGeometrySize
// << ", mDirty = " << mDirty << "." << std::endl;
// #endif
// #ifdef QGISDEBUG
// exportToWKT(geometry);
// std::cout << "QgsFeature::setModifiedGeometry: Original: " << mWKT << "." << std::endl;
// #endif
// #ifdef QGISDEBUG
// exportToWKT(modifiedGeometry);
// std::cout << "QgsFeature::setModifiedGeometry: Modified: " << mWKT << "." << std::endl;
// #endif
//
// }
// bool QgsFeature::insertVertexBefore(double x, double y, int beforeVertex, int atRing, int atItem)
// {
//
// #ifdef QGISDEBUG
// std::cout << "QgsFeature::insertVertexBefore: Entered with "
// << "x " << x << ", y " << y
// << "beforeVertex " << beforeVertex << ", atRing " << atRing << ", atItem"
// << " " << atItem
// << "." << std::endl;
// #endif
//
// // make sure we're using the latest version
// unsigned char * localGeometry = getGeometry();
// size_t localGeometrySize = getGeometrySize();
//
// if (localGeometry)
// {
// int wkbType;
// // double *x,*y;
//
// memcpy(&wkbType, (localGeometry+1), sizeof(int));
// switch (wkbType)
// {
// case QGis::WKBPoint:
// {
// // Meaningless
// return FALSE;
// break;
// }
// case QGis::WKBLineString:
// {
// unsigned char *ptr;
// int *nPoints;
// int idx;
//
// #ifdef QGISDEBUG
// std::cout << "QgsFeature::insertVertexBefore: in QGis::WKBLineString." << std::endl;
// #endif
//
// // get number of points in the line
// ptr = localGeometry + 5; // now at localGeometry.numPoints
// nPoints = (int *) ptr;
//
// /*
// #ifdef QGISDEBUG
// std::cout << "QgsFeature::insertVertexBefore: old number of points is "
// << (*nPoints)
// << "." << std::endl;
// #endif
// */
// // silently adjust any overflow "beforeVertex" values to mean
// // "append to end of string"
// if (*nPoints < beforeVertex)
// {
// beforeVertex = *nPoints; // beforeVertex is 0 based, *nPoints is 1 based
// }
//
// // create new geometry expanded by 2 doubles
// unsigned char *newWKB = new unsigned char[localGeometrySize + 16];
// memset(newWKB, '\0', localGeometrySize + 16); // just in case
// /*
// #ifdef QGISDEBUG
// std::cout << "QgsFeature::insertVertexBefore: newWKB at " << newWKB << "." << std::endl;
// #endif
//
//
// #ifdef QGISDEBUG
// std::cout << "QgsFeature::insertVertexBefore: done initial newWKB of "
// << (localGeometrySize + 16)
// << " bytes." << std::endl;
// #endif
// */
// // copy section before splice
// memcpy(newWKB, localGeometry, 9 + (16 * beforeVertex) );
// /*
// #ifdef QGISDEBUG
// std::cout << "QgsFeature::insertVertexBefore: done pre memcpy of "
// << (9 + (16 * beforeVertex))
// << " bytes." << std::endl;
// #endif
// #ifdef QGISDEBUG
// exportToWKT(newWKB);
// std::cout << "QgsFeature::insertVertexBefore: newWKB: " << mWKT << "." << std::endl;
// #endif
// */
// // adjust number of points
// (*nPoints)++;
// ptr = newWKB + 5; // now at newWKB.numPoints
// memcpy(ptr, nPoints, 4);
// /*
// #ifdef QGISDEBUG
// std::cout << "QgsFeature::insertVertexBefore: new number of points is "
// << (*nPoints)
// << "." << std::endl;
// #endif
// */
//
// // copy vertex to be spliced
// ptr += 4; // now at newWKB.points[]
// #ifdef QGISDEBUG
// // std::cout << "QgsFeature::insertVertexBefore: ptr at " << ptr << "." << std::endl;
// #endif
// ptr += (16 * beforeVertex);
// #ifdef QGISDEBUG
// // std::cout << "QgsFeature::insertVertexBefore: going to add x " << x << "." << std::endl;
// // std::cout << "QgsFeature::insertVertexBefore: ptr at " << ptr << ", going to add x " << x << "." << std::endl;
// #endif
// memcpy(ptr, &x, 8);
// // memcpy(ptr, x, 8);
// ptr += 8;
// #ifdef QGISDEBUG
// // std::cout << "QgsFeature::insertVertexBefore: going to add y " << y << "." << std::endl;
// // std::cout << "QgsFeature::insertVertexBefore: ptr at " << ptr << ", going to add y " << y << "." << std::endl;
// #endif
// memcpy(ptr, &y, 8);
// // memcpy(ptr, y, 8);
// ptr += 8;
//
// /*
// #ifdef QGISDEBUG
// exportToWKT(newWKB);
// std::cout << "QgsFeature::insertVertexBefore: newWKB: " << mWKT << "." << std::endl;
// #endif
// */
//
// // copy section after splice
// memcpy(ptr, localGeometry + 9 + (16 * beforeVertex), (16 * (*nPoints - beforeVertex)) );
//
// /*
// #ifdef QGISDEBUG
// std::cout << "QgsFeature::insertVertexBefore: done post memcpy of "
// << (16 * (*nPoints - beforeVertex))
// << " bytes." << std::endl;
// #endif
// */
// #ifdef QGISDEBUG
// exportToWKT(newWKB);
// std::cout << "QgsFeature::insertVertexBefore: newWKB: " << mWKT << "." << std::endl;
// #endif
//
// // set new geomtry to this object
// setModifiedGeometry(newWKB, localGeometrySize + 16);
//
// break;
// }
// case QGis::WKBPolygon:
// {
// // TODO
// return false;
// break;
// }
// case QGis::WKBMultiPoint:
// {
// // TODO
// return false;
// break;
// }
//
// case QGis::WKBMultiLineString:
// {
// // TODO
// return false;
// break;
// }
//
// case QGis::WKBMultiPolygon:
// {
// // TODO
// return false;
// break;
// }
// default:
// #ifdef QGISDEBUG
// qWarning("error: feature type not recognized in QgsFeature::insertVertexBefore");
// #endif
// return false;
// break;
// }
//
// #ifdef QGISDEBUG
// std::cout << "QgsFeature::insertVertexBefore: Exiting successfully." << std::endl;
// #endif
//
// return true;
//
// }
// else
// {
// #ifdef QGISDEBUG
// qWarning("error: no geometry pointer in QgsFeature::insertVertexBefore");
// #endif
// return false;
// }
//
//
//
// }
//
//
// bool QgsFeature::moveVertexAt(double x, double y, int atVertex, int atRing, int atItem)
// {
// }
//
//
// bool QgsFeature::vertexAt(double &x, double &y, int atVertex, int atRing, int atItem) const
// {
// #ifdef QGISDEBUG
// std::cout << "QgsFeature::vertexAt: Entered with "
// << "atVertex " << atVertex << ", atRing " << atRing << ", atItem"
// << " " << atItem
// << "." << std::endl;
// #endif
//
// if(geometry)
// {
// int wkbType;
//
// memcpy(&wkbType, (geometry+1), sizeof(int));
// switch (wkbType)
// {
// case QGis::WKBPoint:
// {
// // TODO
// return FALSE;
// break;
// }
// case QGis::WKBLineString:
// {
// unsigned char *ptr;
// int *nPoints;
// int idx;
//
// // get number of points in the line
// ptr = geometry + 5; // now at geometry.numPoints
// nPoints = (int *) ptr;
//
// #ifdef QGISDEBUG
// std::cout << "QgsFeature::vertexAt: Number of points in WKBLineString is " << *nPoints
// << "." << std::endl;
// #endif
//
// // silently adjust any overflow "atVertex" values to mean
// // "append to end of string"
// if (*nPoints <= atVertex)
// {
// atVertex = (*nPoints - 1); // atVertex is 0 based, *nPoints is 1 based
// }
//
// // copy the vertex coordinates
// ptr = geometry + 9 + (atVertex * 16);
// memcpy(&x, ptr, 8);
// ptr += 8;
// memcpy(&y, ptr, 8);
//
// #ifdef QGISDEBUG
// std::cout << "QgsFeature::vertexAt: Point is (" << x << ", " << y << ")"
// << "." << std::endl;
// #endif
//
// break;
// }
// case QGis::WKBPolygon:
// {
// // TODO
// return false;
// break;
// }
// case QGis::WKBMultiPoint:
// {
// // TODO
// return false;
// break;
// }
//
// case QGis::WKBMultiLineString:
// {
// // TODO
// return false;
// break;
// }
//
// case QGis::WKBMultiPolygon:
// {
// // TODO
// return false;
// break;
// }
// default:
// #ifdef QGISDEBUG
// qWarning("error: feature type not recognized in QgsFeature::vertexAt");
// #endif
// return false;
// break;
// }
//
// #ifdef QGISDEBUG
// std::cout << "QgsFeature::vertexAt: Exiting TRUE." << std::endl;
// #endif
//
// return true;
//
// }
// else
// {
// #ifdef QGISDEBUG
// qWarning("error: no geometry pointer in QgsFeature::vertexAt");
// #endif
// return false;
// }
//
//
// }
bool QgsFeature::isValid() const
{
return mValid;
}
void QgsFeature::setValid(bool validity)
{
mValid = validity;
}
bool QgsFeature::isDirty() const
{
return mDirty;
}
void QgsFeature::resetDirty()
{
mDirty = FALSE;
}
// bool QgsFeature::intersects(QgsRect* r) const
// {
// bool returnval=false;
//
// geos::GeometryFactory *gf = new geos::GeometryFactory();
// geos::WKTReader *wktReader = new geos::WKTReader(gf);
// geos::Geometry *geosGeom = wktReader->read( qstrdup(wellKnownText()) );
//
// //write the selection rectangle to wkt by hand
// QString rectwkt="POLYGON((";
// rectwkt+=QString::number(r->xMin(),'f',3);
// rectwkt+=" ";
// rectwkt+=QString::number(r->yMin(),'f',3);
// rectwkt+=",";
// rectwkt+=QString::number(r->xMax(),'f',3);
// rectwkt+=" ";
// rectwkt+=QString::number(r->yMin(),'f',3);
// rectwkt+=",";
// rectwkt+=QString::number(r->xMax(),'f',3);
// rectwkt+=" ";
// rectwkt+=QString::number(r->yMax(),'f',3);
// rectwkt+=",";
// rectwkt+=QString::number(r->xMin(),'f',3);
// rectwkt+=" ";
// rectwkt+=QString::number(r->yMax(),'f',3);
// rectwkt+=",";
// rectwkt+=QString::number(r->xMin(),'f',3);
// rectwkt+=" ";
// rectwkt+=QString::number(r->yMin(),'f',3);
// rectwkt+="))";
//
// geos::Geometry *geosRect = wktReader->read( qstrdup(rectwkt) );
// if(geosGeom->intersects(geosRect))
// {
// returnval=true;
// }
//
// delete geosGeom;
// delete geosRect;
// delete gf;
// delete wktReader;
// return returnval;
// }
//
//
// bool QgsFeature::exportToWKT(unsigned char * geom) const
// {
// if(geom)
// {
// int wkbType;
// double *x,*y;
//
// mWKT="";
// memcpy(&wkbType, (geom+1), sizeof(int));
// switch (wkbType)
// {
// case QGis::WKBPoint:
// {
// mWKT+="POINT(";
// x = (double *) (geom + 5);
// mWKT+=QString::number(*x,'f',3);
// mWKT+=" ";
// y = (double *) (geom + 5 + sizeof(double));
// mWKT+=QString::number(*y,'f',3);
// mWKT+=")";
// break;
// }
// case QGis::WKBLineString:
// {
// unsigned char *ptr;
// int *nPoints;
// int idx;
//
// mWKT+="LINESTRING(";
// // get number of points in the line
// ptr = geom + 5;
// nPoints = (int *) ptr;
// ptr = geom + 1 + 2 * sizeof(int);
// for (idx = 0; idx < *nPoints; ++idx)
// {
// if(idx!=0)
// {
// mWKT+=", ";
// }
// x = (double *) ptr;
// mWKT+=QString::number(*x,'f',3);
// mWKT+=" ";
// ptr += sizeof(double);
// y = (double *) ptr;
// mWKT+=QString::number(*y,'f',3);
// ptr += sizeof(double);
// }
// mWKT+=")";
// break;
// }
// case QGis::WKBPolygon:
// {
// unsigned char *ptr;
// int idx, jdx;
// int *numRings, *nPoints;
//
// mWKT+="POLYGON(";
// // get number of rings in the polygon
// numRings = (int *)(geom + 1 + sizeof(int));
// if (!(*numRings)) // sanity check for zero rings in polygon
// {
// break;
// }
// int *ringStart; // index of first point for each ring
// int *ringNumPoints; // number of points in each ring
// ringStart = new int[*numRings];
// ringNumPoints = new int[*numRings];
// ptr = geom+1+2*sizeof(int); // set pointer to the first ring
// for (idx = 0; idx < *numRings; idx++)
// {
// if(idx!=0)
// {
// mWKT+=",";
// }
// mWKT+="(";
// // get number of points in the ring
// nPoints = (int *) ptr;
// ringNumPoints[idx] = *nPoints;
// ptr += 4;
//
// for(jdx=0;jdx<*nPoints;jdx++)
// {
// if(jdx!=0)
// {
// mWKT+=",";
// }
// x = (double *) ptr;
// mWKT+=QString::number(*x,'f',3);
// mWKT+=" ";
// ptr += sizeof(double);
// y = (double *) ptr;
// mWKT+=QString::number(*y,'f',3);
// ptr += sizeof(double);
// }
// mWKT+=")";
// }
// mWKT+=")";
// delete [] ringStart;
// delete [] ringNumPoints;
// break;
// }
// case QGis::WKBMultiPoint:
// {
// unsigned char *ptr;
// int idx;
// int *nPoints;
//
// mWKT+="MULTIPOINT(";
// nPoints=(int*)(geom+5);
// ptr=geom+5+sizeof(int);
// for(idx=0;idx<*nPoints;++idx)
// {
// if(idx!=0)
// {
// mWKT+=", ";
// }
// x = (double *) (ptr);
// mWKT+=QString::number(*x,'f',3);
// mWKT+=" ";
// ptr+=sizeof(double);
// y= (double *) (ptr);
// mWKT+=QString::number(*y,'f',3);
// ptr+=sizeof(double);
// }
// mWKT+=")";
// break;
// }
//
// case QGis::WKBMultiLineString:
// {
// unsigned char *ptr;
// int idx, jdx, numLineStrings;
// int *nPoints;
//
// mWKT+="MULTILINESTRING(";
// numLineStrings = (int) (geom[5]);
// ptr = geom + 9;
// for (jdx = 0; jdx < numLineStrings; jdx++)
// {