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Forgot begin-end fields

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uclaros 2020-12-27 12:52:10 +02:00 committed by Nyall Dawson
parent 43e673a143
commit 2242c1f4c2
1 changed files with 16 additions and 1 deletions
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17
src/analysis/processing/qgsalgorithmpointstopaths.cpp
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@ -157,7 +157,17 @@ QVariantMap QgsPointsToPathsAlgorithm::processAlgorithm( const QVariantMap &para
QStringList requiredFields = QStringList( orderExpression.referencedColumns().values() );
orderExpression.prepare( &expressionContext );
QVariant::Type orderFieldType = QVariant::String;
QgsFields outputFields = QgsFields();
if ( orderExpression.isField() )
{
const int orderFieldIndex = source->fields().indexFromName( orderExpression.referencedColumns().values().first() );
orderFieldType = source->fields().field( orderFieldIndex ).type();
}
outputFields.append( QgsField( "begin", orderFieldType ) );
outputFields.append( QgsField( "end", orderFieldType ) );
const QString groupExpressionString = parameterAsString( parameters, QStringLiteral( "GROUP_EXPRESSION" ), context );
QgsExpression groupExpression = groupExpressionString.isEmpty() ? QgsExpression( QString( "true" ) ) : QgsExpression( groupExpressionString );
if ( groupExpression.hasParserError() )
@ -276,6 +286,8 @@ QVariantMap QgsPointsToPathsAlgorithm::processAlgorithm( const QVariantMap &para
QgsFeature outputFeature;
QgsAttributes attrs;
attrs.append( hit.value().first().first );
attrs.append( hit.value().last().first );
attrs.append( hit.key() );
outputFeature.setGeometry( QgsGeometry::fromPolyline( pathPoints ) );
outputFeature.setAttributes( attrs );
@ -288,6 +300,9 @@ QVariantMap QgsPointsToPathsAlgorithm::processAlgorithm( const QVariantMap &para
if ( !textFile.open( QIODevice::WriteOnly | QIODevice::Text ) )
throw QgsProcessingException( QObject::tr( "Cannot open file for writing " ) + filename );
QgsDistanceArea da = QgsDistanceArea();
da.setSourceCrs( source->sourceCrs(), context.transformContext() );
da.setEllipsoid( context.ellipsoid() );
QTextStream out( &textFile );
out << QString( "angle=Azimuth\n"
"heading=Coordinate_System\n"
@ -299,7 +314,7 @@ QVariantMap QgsPointsToPathsAlgorithm::processAlgorithm( const QVariantMap &para
for ( int i = 1; i < pathPoints.size(); ++i )
{
const double angle = pathPoints.at( i - 1 ).azimuth( pathPoints.at( i ) );
const double distance = pathPoints.at( i - 1 ).distance( pathPoints.at( i ) );
const double distance = da.measureLine( pathPoints.at( i - 1 ), pathPoints.at( i ) );
out << QString( "%1;%2;90\n" ).arg( angle ).arg( distance );
}
}