QSettingsHelper.h

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2019 ISIS Rutherford Appleton Laboratory UKRI,
//     NScD Oak Ridge National Laboratory, European Spallation Source
//     & Institut Laue - Langevin
// SPDX - License - Identifier: GPL - 3.0 +
#pragma once
 
#include <QMetaType>
#include <QSettings>
#include <QString>
#include <QStringList>
#include <QVariant>
#include <map>
#include <string>
#include <typeinfo>
 
namespace MantidQt {
namespace MantidWidgets {
namespace QSettingsHelper {
 
template <typename T> T getSetting(std::string const &settingGroup, std::string const &settingName) {
  QSettings settings;
  settings.beginGroup(QString::fromStdString(settingGroup));
  auto const settingValue = settings.value(QString::fromStdString(settingName));
  settings.endGroup();
 
  return settingValue.value<T>();
}
 
template <typename T> std::map<std::string, T> getSettingsAsMap(std::string const &settingGroup) {
  std::map<std::string, T> settingsMap;
  QSettings settings;
  settings.beginGroup(QString::fromStdString(settingGroup));
  QStringList settingNames = settings.allKeys();
  std::string templateTypeName = typeid(T).name();
  for (auto &settingName : settingNames) {
    if (settingName.endsWith("/type")) {
      std::string settingTypeName = settings.value(settingName).toString().toStdString();
      if (settingTypeName == templateTypeName) {
        auto settingValueName = settingName.replace(QString("/type"), QString("/value"));
        auto setting = settings.value(settingValueName);
        auto strippedSettingName = settingName.remove(QString("/value"));
        settingsMap[strippedSettingName.toStdString()] = setting.value<T>();
      }
    }
  }
  settings.endGroup();
 
  return settingsMap;
}
 
template <typename T> void setSetting(std::string const &settingGroup, std::string const &settingName, T const &value) {
  QSettings settings;
  settings.beginGroup(QString::fromStdString(settingGroup));
  settings.setValue(QString::fromStdString(settingName).append("/value"), value);
  settings.setValue(QString::fromStdString(settingName).append("/type"), typeid(value).name());
  settings.endGroup();
}
 
} // namespace QSettingsHelper
} // namespace MantidWidgets
} // namespace MantidQt