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qgsspatialquery.cpp
executable file
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qgsspatialquery.cpp
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/***************************************************************************
qgsspatialquery.cpp
-------------------
begin : Dec 29, 2009
copyright : (C) 2009 by Diego Moreira And Luiz Motta
email : moreira.geo at gmail.com And motta.luiz at gmail.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: qgsspatialquery.cpp 15141 2011-02-08 13:34:43Z jef $ */
#include <QMessageBox>
#include <qgsvectordataprovider.h>
#include <qgsfeature.h>
#include "qgsgeometrycoordinatetransform.h"
#include "qgsspatialquery.h"
QgsSpatialQuery::QgsSpatialQuery( MngProgressBar *pb )
{
mPb = pb;
mUseTargetSelection = mUseReferenceSelection = false;
} // QgsSpatialQuery::QgsSpatialQuery(MngProgressBar *pb)
QgsSpatialQuery::~QgsSpatialQuery()
{
delete mReaderFeaturesTarget;
} // QgsSpatialQuery::~QgsSpatialQuery()
void QgsSpatialQuery::setSelectedFeaturesTarget( bool useSelected )
{
mUseTargetSelection = useSelected;
} // void QgsSpatialQuery::setSelectedFeaturesTarget(bool useSelected)
void QgsSpatialQuery::setSelectedFeaturesReference( bool useSelected )
{
mUseReferenceSelection = useSelected;
} // void QgsSpatialQuery::setSelectedFeaturesReference(bool useSelected)
void QgsSpatialQuery::runQuery( QSet<int> & qsetIndexResult, QSet<int> & qsetIndexInvalidTarget, QSet<int> & qsetIndexInvalidReference,
int relation, QgsVectorLayer* lyrTarget, QgsVectorLayer* lyrReference )
{
setQuery( lyrTarget, lyrReference );
// Create Spatial index for Reference - Set mIndexReference
mPb->setFormat( QObject::tr( "Processing 1/2 - %p%" ) );
int totalStep = mUseReferenceSelection
? mLayerReference->selectedFeatureCount()
: ( int )( mLayerReference->featureCount() );
mPb->init( 1, totalStep );
setSpatialIndexReference( qsetIndexInvalidReference ); // Need set mLayerReference before
// Make Query
mPb->setFormat( QObject::tr( "Processing 2/2 - %p%" ) );
totalStep = mUseTargetSelection
? mLayerTarget->selectedFeatureCount()
: ( int )( mLayerTarget->featureCount() );
mPb->init( 1, totalStep );
execQuery( qsetIndexResult, qsetIndexInvalidTarget, relation );
} // QSet<int> QgsSpatialQuery::runQuery( int relation)
QMap<QString, int>* QgsSpatialQuery::getTypesOperations( QgsVectorLayer* lyrTarget, QgsVectorLayer* lyrReference )
{
/* Relations from OGC document (obtain in February 2010)
06-103r3_Candidate_Implementation_Specification_for_Geographic_Information_-_Simple_feature_access_-_Part_1_Common_Architecture_v1.2.0.pdf
(P)oint, (L)ine and (A)rea
Target Geometry(P,L,A) / Reference Geometry (P,L,A)
dim -> Dimension of geometry
Relations:
1) Intersects and Disjoint: All
2) Touches: P/L P/A L/L L/A A/A
dimReference > dimTarget OR dimReference = dimTarget if dimReference > 0
3) Crosses: P/L P/A L/L L/A
dimReference > dimTarget OR dimReference = dimTarget if dimReference = 1
4) Within: P/L P/A L/A A/A
dimReference > dimTarget OR dimReference = dimTarget if dimReference = 2
5) Equals: P/P L/L A/A
dimReference = dimTarget
6) Overlaps: P/P L/L A/A
dimReference = dimTarget
7) Contains: L/P A/P A/L A/A
dimReference < dimTarget OR dimReference = dimTarget if dimReference = 2
*/
QMap<QString, int> * operations = new QMap<QString, int>;
operations->insert( QObject::tr( "Intersects" ), Intersects );
operations->insert( QObject::tr( "Disjoint" ), Disjoint );
short int dimTarget = 0, dimReference = 0;
dimTarget = dimensionGeometry( lyrTarget->geometryType() );
dimReference = dimensionGeometry( lyrReference->geometryType() );
if ( dimReference > dimTarget )
{
operations->insert( QObject::tr( "Touches" ), Touches );
operations->insert( QObject::tr( "Crosses" ), Crosses );
operations->insert( QObject::tr( "Within" ), Within );
}
else if ( dimReference < dimTarget )
{
operations->insert( QObject::tr( "Contains" ), Contains );
}
else // dimReference == dimTarget
{
operations->insert( QObject::tr( "Equals" ), Equals );
operations->insert( QObject::tr( "Overlaps" ), Overlaps );
switch ( dimReference )
{
case 0:
break;
case 1:
operations->insert( QObject::tr( "Touches" ), Touches );
operations->insert( QObject::tr( "Crosses" ), Crosses );
break;
case 2:
operations->insert( QObject::tr( "Touches" ), Touches );
operations->insert( QObject::tr( "Within" ), Within );
operations->insert( QObject::tr( "Contains" ), Contains );
}
}
return operations;
} // QMap<QString, int>* QgsSpatialQuery::getTypesOperators(QgsVectorLayer* lyrTarget, QgsVectorLayer* lyrReference)
short int QgsSpatialQuery::dimensionGeometry( QGis::GeometryType geomType )
{
int dimGeom = 0;
switch ( geomType )
{
case QGis::Point:
dimGeom = 0;
break;
case QGis::Line:
dimGeom = 1;
break;
case QGis::Polygon:
dimGeom = 2;
break;
default:
Q_ASSERT( 0 );
break;
}
return dimGeom;
} // int QgsSpatialQuery::dimensionGeometry(QGis::GeometryType geomType)
void QgsSpatialQuery::setQuery( QgsVectorLayer *layerTarget, QgsVectorLayer *layerReference )
{
mLayerTarget = layerTarget;
mReaderFeaturesTarget = new QgsReaderFeatures( mLayerTarget, mUseTargetSelection );
mLayerReference = layerReference;
} // void QgsSpatialQuery::setQuery (QgsVectorLayer *layerTarget, QgsVectorLayer *layerReference)
bool QgsSpatialQuery::hasValidGeometry( QgsFeature &feature )
{
if ( ! feature.isValid() )
{
return false;
}
QgsGeometry *geom = feature.geometry();
if ( NULL == geom )
{
return false;
}
if ( geom->isGeosEmpty() || !geom->isGeosValid() )
{
return false;
}
return true;
} // bool QgsSpatialQuery::hasValidGeometry(QgsFeature &feature)
void QgsSpatialQuery::setSpatialIndexReference( QSet<int> & qsetIndexInvalidReference )
{
QgsReaderFeatures * readerFeaturesReference = new QgsReaderFeatures( mLayerReference, mUseReferenceSelection );
QgsFeature feature;
int step = 1;
while ( readerFeaturesReference->nextFeature( feature ) )
{
mPb->step( step++ );
if ( ! hasValidGeometry( feature ) )
{
qsetIndexInvalidReference.insert( feature.id() );
continue;
}
mIndexReference.insertFeature( feature );
}
delete readerFeaturesReference;
} // void QgsSpatialQuery::setSpatialIndexReference()
void QgsSpatialQuery::execQuery( QSet<int> & qsetIndexResult, QSet<int> & qsetIndexInvalidTarget, int relation )
{
bool ( QgsGeometry::* operation )( QgsGeometry * );
switch ( relation )
{
case Disjoint:
operation = &QgsGeometry::disjoint;
break;
case Equals:
operation = &QgsGeometry::equals;
break;
case Touches:
operation = &QgsGeometry::touches;
break;
case Overlaps:
operation = &QgsGeometry::overlaps;
break;
case Within:
operation = &QgsGeometry::within;
break;
case Contains:
operation = &QgsGeometry::contains;
break;
case Crosses:
operation = &QgsGeometry::crosses;
break;
case Intersects:
operation = &QgsGeometry::intersects;
break;
default:
qWarning( "undefined operation" );
return;
}
// Transform referencer Target = Reference
QgsGeometryCoordinateTransform *coordinateTransform = new QgsGeometryCoordinateTransform();
coordinateTransform->setCoordinateTransform( mLayerTarget, mLayerReference );
// Set function for populate result
void ( QgsSpatialQuery::* funcPopulateIndexResult )( QSet<int> &, int, QgsGeometry *, bool ( QgsGeometry::* )( QgsGeometry * ) );
funcPopulateIndexResult = ( relation == Disjoint )
? &QgsSpatialQuery::populateIndexResultDisjoint
: &QgsSpatialQuery::populateIndexResult;
QgsFeature featureTarget;
QgsGeometry * geomTarget;
int step = 1;
while ( mReaderFeaturesTarget->nextFeature( featureTarget ) )
{
mPb->step( step++ );
if ( ! hasValidGeometry( featureTarget ) )
{
qsetIndexInvalidTarget.insert( featureTarget.id() );
continue;
}
geomTarget = featureTarget.geometry();
coordinateTransform->transform( geomTarget );
( this->*funcPopulateIndexResult )( qsetIndexResult, featureTarget.id(), geomTarget, operation );
}
delete coordinateTransform;
} // QSet<int> QgsSpatialQuery::execQuery( QSet<int> & qsetIndexResult, int relation)
void QgsSpatialQuery::populateIndexResult(
QSet<int> &qsetIndexResult, int idTarget, QgsGeometry * geomTarget,
bool ( QgsGeometry::* op )( QgsGeometry * ) )
{
QList<int> listIdReference;
listIdReference = mIndexReference.intersects( geomTarget->boundingBox() );
if ( listIdReference.count() == 0 )
{
return;
}
QgsFeature featureReference;
QgsGeometry * geomReference;
QList<int>::iterator iterIdReference = listIdReference.begin();
for ( ; iterIdReference != listIdReference.end(); iterIdReference++ )
{
mLayerReference->featureAtId( *iterIdReference, featureReference );
geomReference = featureReference.geometry();
if (( geomTarget->*op )( geomReference ) )
{
qsetIndexResult.insert( idTarget );
break;
}
}
} // void QgsSpatialQuery::populateIndexResult(...
void QgsSpatialQuery::populateIndexResultDisjoint(
QSet<int> &qsetIndexResult, int idTarget, QgsGeometry * geomTarget,
bool ( QgsGeometry::* op )( QgsGeometry * ) )
{
QList<int> listIdReference;
listIdReference = mIndexReference.intersects( geomTarget->boundingBox() );
if ( listIdReference.count() == 0 )
{
qsetIndexResult.insert( idTarget );
return;
}
QgsFeature featureReference;
QgsGeometry * geomReference;
QList<int>::iterator iterIdReference = listIdReference.begin();
bool addIndex = true;
for ( ; iterIdReference != listIdReference.end(); iterIdReference++ )
{
mLayerReference->featureAtId( *iterIdReference, featureReference );
geomReference = featureReference.geometry();
if ( !( geomTarget->*op )( geomReference ) )
{
addIndex = false;
break;
}
}
if ( addIndex )
{
qsetIndexResult.insert( idTarget );
}
} // void QgsSpatialQuery::populateIndexResultDisjoint( ...