DlgValidatorNumber.cpp

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/******************************************************************************************************
 * (C) 2014 markummitchell@github.com. This file is part of Engauge Digitizer, which is released      *
 * under GNU General Public License version 2 (GPLv2) or (at your option) any later version. See file *
 * LICENSE or go to gnu.org/licenses for details. Distribution requires prior written permission.     *
 ******************************************************************************************************/
 
#include "DlgValidatorNumber.h"
#include "Logger.h"
#include <QDoubleValidator>
#include <QLocale>
 
DlgValidatorNumber::DlgValidatorNumber(CoordScale coordScale,
                                       const QLocale &locale,
                                       QObject *parent) :
  DlgValidatorAbstract(parent),
  m_coordScale (coordScale),
  m_locale (locale)
{
  qCInfo(ENGAUGE_LOG) << "DlgValidatorNumber::DlgValidatorNumber";
}
 
QValidator::State DlgValidatorNumber::validate (QString &input,
                                                int &pos) const
{
  // First do standard check
  QDoubleValidator validator;
  validator.setLocale (m_locale);
  QValidator::State state = validator.validate (input,
                                                pos);
  if (state == QValidator::Acceptable) {
 
    if (m_coordScale == COORD_SCALE_LOG) {
      if (m_locale.toDouble (input) < 0.0) {
 
        // Cannot allow negative number
        state = QValidator::Invalid;
 
      } if (m_locale.toDouble (input) == 0.0) {
 
        // Treat as a leading zero, which is legal
        state = QValidator::Intermediate;
      }
    }
  }
 
  return state;
}