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testqgsmaptoolidentifyaction.cpp
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testqgsmaptoolidentifyaction.cpp
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/***************************************************************************
testqgsmaptoolidentifyaction.cpp
--------------------------------
Date : 2016-02-14
Copyright : (C) 2016 by Nyall Dawson
Email : nyall dot dawson at gmail dot 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. *
* *
***************************************************************************/
#include "qgstest.h"
#include "qgsapplication.h"
#include "qgsvectorlayer.h"
#include "qgsrasterlayer.h"
#include "qgsfeature.h"
#include "qgsgeometry.h"
#include "qgsvectordataprovider.h"
#include "qgsproject.h"
#include "qgsmapcanvas.h"
#include "qgsunittypes.h"
#include "qgsmaptoolidentifyaction.h"
#include "qgssettings.h"
#include "qgstestutils.h"
#include "cpl_conv.h"
class TestQgsMapToolIdentifyAction : public QObject
{
Q_OBJECT
public:
TestQgsMapToolIdentifyAction()
: canvas( 0 )
{}
private slots:
void initTestCase(); // will be called before the first testfunction is executed.
void cleanupTestCase(); // will be called after the last testfunction was executed.
void init(); // will be called before each testfunction is executed.
void cleanup(); // will be called after every testfunction.
void lengthCalculation(); //test calculation of derived length attributes
void perimeterCalculation(); //test calculation of derived perimeter attribute
void areaCalculation(); //test calculation of derived area attribute
void identifyRasterFloat32(); // test pixel identification and decimal precision
void identifyRasterFloat64(); // test pixel identification and decimal precision
void identifyInvalidPolygons(); // test selecting invalid polygons
private:
QgsMapCanvas *canvas = nullptr;
QString testIdentifyRaster( QgsRasterLayer *layer, double xGeoref, double yGeoref );
QList<QgsMapToolIdentify::IdentifyResult> testIdentifyVector( QgsVectorLayer *layer, double xGeoref, double yGeoref );
// Release return with delete []
unsigned char *
hex2bytes( const char *hex, int *size )
{
QByteArray ba = QByteArray::fromHex( hex );
unsigned char *out = new unsigned char[ba.size()];
memcpy( out, ba.data(), ba.size() );
*size = ba.size();
return out;
}
// TODO: make this a QgsGeometry member...
QgsGeometry geomFromHexWKB( const char *hexwkb )
{
int wkbsize;
unsigned char *wkb = hex2bytes( hexwkb, &wkbsize );
QgsGeometry geom;
// NOTE: QgsGeometry takes ownership of wkb
geom.fromWkb( wkb, wkbsize );
return geom;
}
};
void TestQgsMapToolIdentifyAction::initTestCase()
{
QgsApplication::init();
QgsApplication::initQgis();
// Set up the QgsSettings environment
QCoreApplication::setOrganizationName( QStringLiteral( "QGIS" ) );
QCoreApplication::setOrganizationDomain( QStringLiteral( "qgis.org" ) );
QCoreApplication::setApplicationName( QStringLiteral( "QGIS-TEST" ) );
QgsApplication::showSettings();
// enforce C locale because the tests expect it
// (decimal separators / thousand separators)
QLocale::setDefault( QLocale::c() );
}
void TestQgsMapToolIdentifyAction::cleanupTestCase()
{
QgsApplication::exitQgis();
}
void TestQgsMapToolIdentifyAction::init()
{
canvas = new QgsMapCanvas();
}
void TestQgsMapToolIdentifyAction::cleanup()
{
delete canvas;
}
void TestQgsMapToolIdentifyAction::lengthCalculation()
{
QgsSettings s;
s.setValue( QStringLiteral( "/qgis/measure/keepbaseunit" ), true );
//create a temporary layer
std::unique_ptr< QgsVectorLayer> tempLayer( new QgsVectorLayer( QStringLiteral( "LineString?crs=epsg:3111&field=pk:int&field=col1:double" ), QStringLiteral( "vl" ), QStringLiteral( "memory" ) ) );
QVERIFY( tempLayer->isValid() );
QgsFeature f1( tempLayer->dataProvider()->fields(), 1 );
f1.setAttribute( QStringLiteral( "pk" ), 1 );
f1.setAttribute( QStringLiteral( "col1" ), 0.0 );
QgsPolyline line3111;
line3111 << QgsPointXY( 2484588, 2425722 ) << QgsPointXY( 2482767, 2398853 );
QgsGeometry line3111G = QgsGeometry::fromPolyline( line3111 ) ;
f1.setGeometry( line3111G );
tempLayer->dataProvider()->addFeatures( QgsFeatureList() << f1 );
// set project CRS and ellipsoid
QgsCoordinateReferenceSystem srs( 3111, QgsCoordinateReferenceSystem::EpsgCrsId );
canvas->setDestinationCrs( srs );
canvas->setExtent( f1.geometry().boundingBox() );
QgsProject::instance()->setCrs( srs );
QgsProject::instance()->setEllipsoid( QStringLiteral( "WGS84" ) );
QgsProject::instance()->setDistanceUnits( QgsUnitTypes::DistanceMeters );
QgsPointXY mapPoint = canvas->getCoordinateTransform()->transform( 2484588, 2425722 );
std::unique_ptr< QgsMapToolIdentifyAction > action( new QgsMapToolIdentifyAction( canvas ) );
QList<QgsMapToolIdentify::IdentifyResult> result = action->identify( mapPoint.x(), mapPoint.y(), QList<QgsMapLayer *>() << tempLayer.get() );
QCOMPARE( result.length(), 1 );
QString derivedLength = result.at( 0 ).mDerivedAttributes[tr( "Length" )];
double length = derivedLength.remove( ',' ).split( ' ' ).at( 0 ).toDouble();
QGSCOMPARENEAR( length, 26932.2, 0.1 );
//check that project units are respected
QgsProject::instance()->setDistanceUnits( QgsUnitTypes::DistanceFeet );
result = action->identify( mapPoint.x(), mapPoint.y(), QList<QgsMapLayer *>() << tempLayer.get() );
QCOMPARE( result.length(), 1 );
derivedLength = result.at( 0 ).mDerivedAttributes[tr( "Length" )];
length = derivedLength.remove( ',' ).split( ' ' ).at( 0 ).toDouble();
QGSCOMPARENEAR( length, 88360.1, 0.1 );
//test unchecked "keep base units" setting
s.setValue( QStringLiteral( "/qgis/measure/keepbaseunit" ), false );
result = action->identify( mapPoint.x(), mapPoint.y(), QList<QgsMapLayer *>() << tempLayer.get() );
QCOMPARE( result.length(), 1 );
derivedLength = result.at( 0 ).mDerivedAttributes[tr( "Length" )];
length = derivedLength.remove( ',' ).split( ' ' ).at( 0 ).toDouble();
QGSCOMPARENEAR( length, 16.735, 0.001 );
}
void TestQgsMapToolIdentifyAction::perimeterCalculation()
{
QgsSettings s;
s.setValue( QStringLiteral( "/qgis/measure/keepbaseunit" ), true );
//create a temporary layer
std::unique_ptr< QgsVectorLayer> tempLayer( new QgsVectorLayer( QStringLiteral( "Polygon?crs=epsg:3111&field=pk:int&field=col1:double" ), QStringLiteral( "vl" ), QStringLiteral( "memory" ) ) );
QVERIFY( tempLayer->isValid() );
QgsFeature f1( tempLayer->dataProvider()->fields(), 1 );
f1.setAttribute( QStringLiteral( "pk" ), 1 );
f1.setAttribute( QStringLiteral( "col1" ), 0.0 );
QgsPolyline polygonRing3111;
polygonRing3111 << QgsPointXY( 2484588, 2425722 ) << QgsPointXY( 2482767, 2398853 ) << QgsPointXY( 2520109, 2397715 ) << QgsPointXY( 2520792, 2425494 ) << QgsPointXY( 2484588, 2425722 );
QgsPolygon polygon3111;
polygon3111 << polygonRing3111;
QgsGeometry polygon3111G = QgsGeometry::fromPolygon( polygon3111 ) ;
f1.setGeometry( polygon3111G );
tempLayer->dataProvider()->addFeatures( QgsFeatureList() << f1 );
// set project CRS and ellipsoid
QgsCoordinateReferenceSystem srs( 3111, QgsCoordinateReferenceSystem::EpsgCrsId );
canvas->setDestinationCrs( srs );
canvas->setExtent( f1.geometry().boundingBox() );
QgsProject::instance()->setCrs( srs );
QgsProject::instance()->setEllipsoid( QStringLiteral( "WGS84" ) );
QgsProject::instance()->setDistanceUnits( QgsUnitTypes::DistanceMeters );
QgsPointXY mapPoint = canvas->getCoordinateTransform()->transform( 2484588, 2425722 );
std::unique_ptr< QgsMapToolIdentifyAction > action( new QgsMapToolIdentifyAction( canvas ) );
QList<QgsMapToolIdentify::IdentifyResult> result = action->identify( mapPoint.x(), mapPoint.y(), QList<QgsMapLayer *>() << tempLayer.get() );
QCOMPARE( result.length(), 1 );
QString derivedPerimeter = result.at( 0 ).mDerivedAttributes[tr( "Perimeter" )];
double perimeter = derivedPerimeter.remove( ',' ).split( ' ' ).at( 0 ).toDouble();
QCOMPARE( perimeter, 128289.074 );
//check that project units are respected
QgsProject::instance()->setDistanceUnits( QgsUnitTypes::DistanceFeet );
result = action->identify( mapPoint.x(), mapPoint.y(), QList<QgsMapLayer *>() << tempLayer.get() );
QCOMPARE( result.length(), 1 );
derivedPerimeter = result.at( 0 ).mDerivedAttributes[tr( "Perimeter" )];
perimeter = derivedPerimeter.remove( ',' ).split( ' ' ).at( 0 ).toDouble();
QGSCOMPARENEAR( perimeter, 420896.0, 0.1 );
//test unchecked "keep base units" setting
s.setValue( QStringLiteral( "/qgis/measure/keepbaseunit" ), false );
result = action->identify( mapPoint.x(), mapPoint.y(), QList<QgsMapLayer *>() << tempLayer.get() );
QCOMPARE( result.length(), 1 );
derivedPerimeter = result.at( 0 ).mDerivedAttributes[tr( "Perimeter" )];
perimeter = derivedPerimeter.remove( ',' ).split( ' ' ).at( 0 ).toDouble();
QGSCOMPARENEAR( perimeter, 79.715, 0.001 );
}
void TestQgsMapToolIdentifyAction::areaCalculation()
{
QgsSettings s;
s.setValue( QStringLiteral( "/qgis/measure/keepbaseunit" ), true );
//create a temporary layer
std::unique_ptr< QgsVectorLayer> tempLayer( new QgsVectorLayer( QStringLiteral( "Polygon?crs=epsg:3111&field=pk:int&field=col1:double" ), QStringLiteral( "vl" ), QStringLiteral( "memory" ) ) );
QVERIFY( tempLayer->isValid() );
QgsFeature f1( tempLayer->dataProvider()->fields(), 1 );
f1.setAttribute( QStringLiteral( "pk" ), 1 );
f1.setAttribute( QStringLiteral( "col1" ), 0.0 );
QgsPolyline polygonRing3111;
polygonRing3111 << QgsPointXY( 2484588, 2425722 ) << QgsPointXY( 2482767, 2398853 ) << QgsPointXY( 2520109, 2397715 ) << QgsPointXY( 2520792, 2425494 ) << QgsPointXY( 2484588, 2425722 );
QgsPolygon polygon3111;
polygon3111 << polygonRing3111;
QgsGeometry polygon3111G = QgsGeometry::fromPolygon( polygon3111 ) ;
f1.setGeometry( polygon3111G );
tempLayer->dataProvider()->addFeatures( QgsFeatureList() << f1 );
// set project CRS and ellipsoid
QgsCoordinateReferenceSystem srs( 3111, QgsCoordinateReferenceSystem::EpsgCrsId );
canvas->setDestinationCrs( srs );
canvas->setExtent( f1.geometry().boundingBox() );
QgsProject::instance()->setCrs( srs );
QgsProject::instance()->setEllipsoid( QStringLiteral( "WGS84" ) );
QgsProject::instance()->setAreaUnits( QgsUnitTypes::AreaSquareMeters );
QgsPointXY mapPoint = canvas->getCoordinateTransform()->transform( 2484588, 2425722 );
std::unique_ptr< QgsMapToolIdentifyAction > action( new QgsMapToolIdentifyAction( canvas ) );
QList<QgsMapToolIdentify::IdentifyResult> result = action->identify( mapPoint.x(), mapPoint.y(), QList<QgsMapLayer *>() << tempLayer.get() );
QCOMPARE( result.length(), 1 );
QString derivedArea = result.at( 0 ).mDerivedAttributes[tr( "Area" )];
double area = derivedArea.remove( ',' ).split( ' ' ).at( 0 ).toDouble();
QGSCOMPARENEAR( area, 1009089817.0, 1.0 );
//check that project units are respected
QgsProject::instance()->setAreaUnits( QgsUnitTypes::AreaSquareMiles );
result = action->identify( mapPoint.x(), mapPoint.y(), QList<QgsMapLayer *>() << tempLayer.get() );
QCOMPARE( result.length(), 1 );
derivedArea = result.at( 0 ).mDerivedAttributes[tr( "Area" )];
area = derivedArea.remove( ',' ).split( ' ' ).at( 0 ).toDouble();
QGSCOMPARENEAR( area, 389.6117, 0.001 );
//test unchecked "keep base units" setting
s.setValue( QStringLiteral( "/qgis/measure/keepbaseunit" ), false );
QgsProject::instance()->setAreaUnits( QgsUnitTypes::AreaSquareFeet );
result = action->identify( mapPoint.x(), mapPoint.y(), QList<QgsMapLayer *>() << tempLayer.get() );
QCOMPARE( result.length(), 1 );
derivedArea = result.at( 0 ).mDerivedAttributes[tr( "Area" )];
area = derivedArea.remove( ',' ).split( ' ' ).at( 0 ).toDouble();
QGSCOMPARENEAR( area, 389.6117, 0.001 );
}
// private
QString TestQgsMapToolIdentifyAction::testIdentifyRaster( QgsRasterLayer *layer, double xGeoref, double yGeoref )
{
std::unique_ptr< QgsMapToolIdentifyAction > action( new QgsMapToolIdentifyAction( canvas ) );
QgsPointXY mapPoint = canvas->getCoordinateTransform()->transform( xGeoref, yGeoref );
QList<QgsMapToolIdentify::IdentifyResult> result = action->identify( mapPoint.x(), mapPoint.y(), QList<QgsMapLayer *>() << layer );
if ( result.length() != 1 )
return QLatin1String( "" );
return result[0].mAttributes[QStringLiteral( "Band 1" )];
}
// private
QList<QgsMapToolIdentify::IdentifyResult>
TestQgsMapToolIdentifyAction::testIdentifyVector( QgsVectorLayer *layer, double xGeoref, double yGeoref )
{
std::unique_ptr< QgsMapToolIdentifyAction > action( new QgsMapToolIdentifyAction( canvas ) );
QgsPointXY mapPoint = canvas->getCoordinateTransform()->transform( xGeoref, yGeoref );
QList<QgsMapToolIdentify::IdentifyResult> result = action->identify( mapPoint.x(), mapPoint.y(), QList<QgsMapLayer *>() << layer );
return result;
}
void TestQgsMapToolIdentifyAction::identifyRasterFloat32()
{
//create a temporary layer
QString raster = QStringLiteral( TEST_DATA_DIR ) + "/raster/test.asc";
// By default the QgsRasterLayer forces AAIGRID_DATATYPE=Float64
CPLSetConfigOption( "AAIGRID_DATATYPE", "Float32" );
std::unique_ptr< QgsRasterLayer> tempLayer( new QgsRasterLayer( raster ) );
CPLSetConfigOption( "AAIGRID_DATATYPE", nullptr );
QVERIFY( tempLayer->isValid() );
canvas->setExtent( QgsRectangle( 0, 0, 7, 1 ) );
QCOMPARE( testIdentifyRaster( tempLayer.get(), 0.5, 0.5 ), QString( "-999.9" ) );
QCOMPARE( testIdentifyRaster( tempLayer.get(), 1.5, 0.5 ), QString( "-999.987" ) );
// More than 6 significant digits for corresponding value in .asc:
// precision loss in Float32
QCOMPARE( testIdentifyRaster( tempLayer.get(), 2.5, 0.5 ), QString( "1.234568" ) ); // in .asc file : 1.2345678
QCOMPARE( testIdentifyRaster( tempLayer.get(), 3.5, 0.5 ), QString( "123456" ) );
// More than 6 significant digits: no precision loss here for that particular value
QCOMPARE( testIdentifyRaster( tempLayer.get(), 4.5, 0.5 ), QString( "1234567" ) );
// More than 6 significant digits: no precision loss here for that particular value
QCOMPARE( testIdentifyRaster( tempLayer.get(), 5.5, 0.5 ), QString( "-999.9876" ) );
// More than 6 significant digits for corresponding value in .asc:
// precision loss in Float32
QCOMPARE( testIdentifyRaster( tempLayer.get(), 6.5, 0.5 ), QString( "1.234568" ) ); // in .asc file : 1.2345678901234
}
void TestQgsMapToolIdentifyAction::identifyRasterFloat64()
{
//create a temporary layer
QString raster = QStringLiteral( TEST_DATA_DIR ) + "/raster/test.asc";
std::unique_ptr< QgsRasterLayer> tempLayer( new QgsRasterLayer( raster ) );
QVERIFY( tempLayer->isValid() );
canvas->setExtent( QgsRectangle( 0, 0, 7, 1 ) );
QCOMPARE( testIdentifyRaster( tempLayer.get(), 0.5, 0.5 ), QString( "-999.9" ) );
QCOMPARE( testIdentifyRaster( tempLayer.get(), 1.5, 0.5 ), QString( "-999.987" ) );
QCOMPARE( testIdentifyRaster( tempLayer.get(), 2.5, 0.5 ), QString( "1.2345678" ) );
QCOMPARE( testIdentifyRaster( tempLayer.get(), 3.5, 0.5 ), QString( "123456" ) );
QCOMPARE( testIdentifyRaster( tempLayer.get(), 4.5, 0.5 ), QString( "1234567" ) );
QCOMPARE( testIdentifyRaster( tempLayer.get(), 5.5, 0.5 ), QString( "-999.9876" ) );
QCOMPARE( testIdentifyRaster( tempLayer.get(), 6.5, 0.5 ), QString( "1.2345678901234" ) );
}
void TestQgsMapToolIdentifyAction::identifyInvalidPolygons()
{
//create a temporary layer
std::unique_ptr< QgsVectorLayer > memoryLayer( new QgsVectorLayer( QStringLiteral( "Polygon?field=pk:int" ), QStringLiteral( "vl" ), QStringLiteral( "memory" ) ) );
QVERIFY( memoryLayer->isValid() );
QgsFeature f1( memoryLayer->dataProvider()->fields(), 1 );
f1.setAttribute( QStringLiteral( "pk" ), 1 );
// This geometry is an invalid polygon (3 distinct vertices).
// GEOS reported invalidity: Points of LinearRing do not form a closed linestring
f1.setGeometry( geomFromHexWKB(
"010300000001000000030000000000000000000000000000000000000000000000000024400000000000000000000000000000244000000000000024400000000000000000"
) );
// TODO: check why we need the ->dataProvider() part, since
// there's a QgsVectorLayer::addFeatures method too
//memoryLayer->addFeatures( QgsFeatureList() << f1 );
memoryLayer->dataProvider()->addFeatures( QgsFeatureList() << f1 );
canvas->setExtent( QgsRectangle( 0, 0, 10, 10 ) );
QList<QgsMapToolIdentify::IdentifyResult> identified;
identified = testIdentifyVector( memoryLayer.get(), 4, 6 );
QCOMPARE( identified.length(), 0 );
identified = testIdentifyVector( memoryLayer.get(), 6, 4 );
QCOMPARE( identified.length(), 1 );
QCOMPARE( identified[0].mFeature.attribute( "pk" ), QVariant( 1 ) );
}
QGSTEST_MAIN( TestQgsMapToolIdentifyAction )
#include "testqgsmaptoolidentifyaction.moc"