C++ (Cpp) createClassesの例

コード例 #1

ファイル: qgsalgorithmreclassifybylayer.cpp プロジェクト: anitagraser/QGIS

QVariantMap QgsReclassifyAlgorithmBase::processAlgorithm( const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback *feedback )
{
  QVector< QgsReclassifyUtils::RasterClass > classes = createClasses( mBoundsType, parameters, context, feedback );

  QgsReclassifyUtils::reportClasses( classes, feedback );
  QgsReclassifyUtils::checkForOverlaps( classes, feedback );

  const QString outputFile = parameterAsOutputLayer( parameters, QStringLiteral( "OUTPUT" ), context );
  QFileInfo fi( outputFile );
  const QString outputFormat = QgsRasterFileWriter::driverForExtension( fi.suffix() );

  std::unique_ptr< QgsRasterFileWriter > writer = qgis::make_unique< QgsRasterFileWriter >( outputFile );
  writer->setOutputProviderKey( QStringLiteral( "gdal" ) );
  writer->setOutputFormat( outputFormat );
  std::unique_ptr<QgsRasterDataProvider > provider( writer->createOneBandRaster( mDataType, mNbCellsXProvider, mNbCellsYProvider, mExtent, mCrs ) );
  if ( !provider )
    throw QgsProcessingException( QObject::tr( "Could not create raster output: %1" ).arg( outputFile ) );
  if ( !provider->isValid() )
    throw QgsProcessingException( QObject::tr( "Could not create raster output %1: %2" ).arg( outputFile, provider->error().message( QgsErrorMessage::Text ) ) );

  provider->setNoDataValue( 1, mNoDataValue );

  QgsReclassifyUtils::reclassify( classes, mInterface.get(), mBand, mExtent, mNbCellsXProvider, mNbCellsYProvider, provider.get(), mNoDataValue, mUseNoDataForMissingValues,
                                  feedback );

  QVariantMap outputs;
  outputs.insert( QStringLiteral( "OUTPUT" ), outputFile );
  return outputs;
}

コード例 #2

ファイル: dataplot.cpp プロジェクト: ndtmike/Aggralinx

DataPlot::DataPlot( QWidget* )
{
    createClasses();
    SetPlotParameters();
    SetGridParameters();
    SetCurveParameters();
    SetRCurveParameters();

    plotDataPoints<< QPointF (0.0,0.0);
}