qgsrangefieldformatter.cpp

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/***************************************************************************
  qgsrangefieldformatter.cpp - QgsRangeFieldFormatter
 
 ---------------------
 begin                : 01/02/2018
 copyright            : (C) 2018 by Alessandro Pasotti
 email                : elpaso at itopen dot it
 ***************************************************************************
 *                                                                         *
 *   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 "qgsrangefieldformatter.h"
 
#include "qgsapplication.h"
#include "qgsfield.h"
#include "qgssettings.h"
#include "qgsvariantutils.h"
#include "qgsvectorlayer.h"
 
#include <QLocale>
#include <QString>
 
using namespace Qt::StringLiterals;
 
QString QgsRangeFieldFormatter::id() const
{
  return u"Range"_s;
}
 
QString QgsRangeFieldFormatter::representValue( QgsVectorLayer *layer, int fieldIndex, const QVariantMap &config, const QVariant &cache, const QVariant &value ) const
{
  Q_UNUSED( cache )
  Q_UNUSED( config )
 
  if ( QgsVariantUtils::isNull( value ) )
  {
    return QgsApplication::nullRepresentation();
  }
 
  QString result;
 
  const QgsField field = layer->fields().at( fieldIndex );
 
  if ( field.type() == QMetaType::Type::Double &&
       config.contains( u"Precision"_s ) &&
       value.isValid( ) )
  {
    bool ok;
    const double val( value.toDouble( &ok ) );
    if ( ok )
    {
      const int precision( config[ u"Precision"_s ].toInt( &ok ) );
      if ( ok )
      {
        // TODO: make the format configurable!
        result = QLocale().toString( val, 'f', precision );
      }
    }
  }
  else if ( ( field.type() == QMetaType::Type::Int ) &&
            value.isValid( ) )
  {
    bool ok;
    const double val( value.toInt( &ok ) );
    if ( ok )
    {
      result =  QLocale().toString( val, 'f', 0 );
    }
  }
  else if ( ( field.type() == QMetaType::Type::LongLong ) &&
            value.isValid( ) )
  {
    bool ok;
    const double val( value.toLongLong( &ok ) );
    if ( ok )
    {
      result =  QLocale().toString( val, 'f', 0 );
    }
  }
  else
  {
    result = value.toString();
  }
  return result;
}