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qgsalgorithmdxfexport.cpp
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qgsalgorithmdxfexport.cpp
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/***************************************************************************
qgsalgorithmdxfexport.cpp
---------------------
Date : September 2020
Copyright : (C) 2020 by Alexander Bruy
Email : alexander dot bruy 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 "qgsalgorithmdxfexport.h"
#include "qgsprocessingparameterdxflayers.h"
#include "qgsdxfexport.h"
///@cond PRIVATE
QString QgsDxfExportAlgorithm::name() const
{
return QStringLiteral( "dxfexport" );
}
QString QgsDxfExportAlgorithm::displayName() const
{
return QObject::tr( "Export DXF" );
}
QStringList QgsDxfExportAlgorithm::tags() const
{
return QObject::tr( "layer,export,dxf,cad" ).split( ',' );
}
QString QgsDxfExportAlgorithm::group() const
{
return QObject::tr( "Vector general" );
}
QString QgsDxfExportAlgorithm::groupId() const
{
return QStringLiteral( "vectorgeneral" );
}
QString QgsDxfExportAlgorithm::shortHelpString() const
{
return QObject::tr( "Exports layers to DXF file." );
}
QgsDxfExportAlgorithm *QgsDxfExportAlgorithm::createInstance() const
{
return new QgsDxfExportAlgorithm();
}
void QgsDxfExportAlgorithm::initAlgorithm( const QVariantMap & )
{
addParameter( new QgsProcessingParameterDxfLayers( QStringLiteral( "LAYERS" ), QObject::tr( "Input layers" ) ) );
addParameter( new QgsProcessingParameterEnum( QStringLiteral( "SYMBOLOGY_MODE" ), QObject::tr( "Symbology mode" ), QStringList() << QObject::tr( "No symbology" ) << QObject::tr( "Feature symbology" ) << QObject::tr( "Symbol layer symbology" ), false, 0 ) );
addParameter( new QgsProcessingParameterScale( QStringLiteral( "SYMBOLOGY_SCALE" ), QObject::tr( "Symbology scale" ), 1000000 ) );
addParameter( new QgsProcessingParameterEnum( QStringLiteral( "ENCODING" ), QObject::tr( "Encoding" ), QgsDxfExport::encodings() ) );
addParameter( new QgsProcessingParameterCrs( QStringLiteral( "CRS" ), QObject::tr( "CRS" ), QStringLiteral( "EPSG:4326" ) ) );
addParameter( new QgsProcessingParameterBoolean( QStringLiteral( "USE_LAYER_TITLE" ), QObject::tr( "Use layer title as name" ), false ) );
addParameter( new QgsProcessingParameterBoolean( QStringLiteral( "FORCE_2D" ), QObject::tr( "Force 2D output" ), false ) );
addParameter( new QgsProcessingParameterBoolean( QStringLiteral( "MTEXT" ), QObject::tr( "Export labels as MTEXT element" ), true ) );
addParameter( new QgsProcessingParameterFileDestination( QStringLiteral( "OUTPUT" ), QObject::tr( "DXF" ), QObject::tr( "DXF Files" ) + " (*.dxf *.DXF)" ) );
}
QVariantMap QgsDxfExportAlgorithm::processAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback *feedback )
{
QgsMapSettings mapSettings;
mapSettings.setDestinationCrs( context.project()->crs() );
mapSettings.setTransformContext( context.transformContext() );
QList<QgsVectorLayer *> mapLayers;
QVariant layersVariant = parameters.value( parameterDefinition( QStringLiteral( "LAYERS" ) )->name() );
const QList<QgsDxfExport::DxfLayer> layers = QgsProcessingParameterDxfLayers::parameterAsLayers( layersVariant, context );
for ( const QgsDxfExport::DxfLayer &layer : layers )
{
if ( !layer.layer() )
throw QgsProcessingException( QObject::tr( "Unknown input layer" ) );
mapLayers.push_back( layer.layer() );
}
QgsDxfExport::SymbologyExport symbologyMode = static_cast< QgsDxfExport::SymbologyExport >( parameterAsInt( parameters, QStringLiteral( "SYMBOLOGY_MODE" ), context ) );
double symbologyScale = parameterAsDouble( parameters, QStringLiteral( "SYMBOLOGY_SCALE" ), context );
QString encoding = QgsDxfExport::encodings().at( parameterAsInt( parameters, QStringLiteral( "ENCODING" ), context ) );
QgsCoordinateReferenceSystem crs = parameterAsCrs( parameters, QStringLiteral( "CRS" ), context );
bool useLayerTitle = parameterAsBool( parameters, QStringLiteral( "USE_LAYER_TITLE" ), context );
bool useMText = parameterAsBool( parameters, QStringLiteral( "MTEXT" ), context );
bool force2D = parameterAsBool( parameters, QStringLiteral( "FORCE_2D" ), context );
QString outputFile = parameterAsFileOutput( parameters, QStringLiteral( "OUTPUT" ), context );
QgsDxfExport dxfExport;
dxfExport.setMapSettings( mapSettings );
dxfExport.addLayers( layers );
dxfExport.setSymbologyScale( symbologyScale );
dxfExport.setSymbologyExport( symbologyMode );
dxfExport.setLayerTitleAsName( useLayerTitle );
dxfExport.setDestinationCrs( crs );
dxfExport.setForce2d( force2D );
QgsDxfExport::Flags flags = QgsDxfExport::Flags();
if ( useMText )
flags = flags | QgsDxfExport::FlagNoMText;
dxfExport.setFlags( flags );
QFile dxfFile( outputFile );
switch ( dxfExport.writeToFile( &dxfFile, encoding ) )
{
case QgsDxfExport::ExportResult::Success:
feedback->pushInfo( QObject::tr( "DXF export completed" ) );
break;
case QgsDxfExport::ExportResult::DeviceNotWritableError:
feedback->reportError( QObject::tr( "DXF export failed, device is not writable" ), true );
break;
case QgsDxfExport::ExportResult::InvalidDeviceError:
feedback->reportError( QObject::tr( "DXF export failed, the device is invalid" ), true );
break;
case QgsDxfExport::ExportResult::EmptyExtentError:
feedback->reportError( QObject::tr( "DXF export failed, the extent could not be determined" ), true );
break;
}
QVariantMap outputs;
outputs.insert( QStringLiteral( "OUTPUT" ), outputFile );
return outputs;
}