supercell-wx/scwx-qt/source/scwx/qt/settings/settings_variable.hpp

#pragma once

#include <functional>
#include <memory>
#include <string>

namespace scwx
{
namespace qt
{
namespace settings
{

template<class T>
class SettingsVariable
{
public:
   explicit SettingsVariable(const std::string& name);
   ~SettingsVariable();

   SettingsVariable(const SettingsVariable&)            = delete;
   SettingsVariable& operator=(const SettingsVariable&) = delete;

   SettingsVariable(SettingsVariable&&) noexcept;
   SettingsVariable& operator=(SettingsVariable&&) noexcept;

   std::string name() const;

   T            GetValue() const;
   bool         SetValue(const T& value);
   virtual bool SetValueOrDefault(const T& value);
   void         SetValueToDefault();

   bool StageValue(const T& value);
   void Commit();

   virtual bool Validate(const T& value) const;

   T GetDefault() const;

   void SetDefault(const T& value);
   void SetMinimum(const T& value);
   void SetMaximum(const T& value);
   void SetValidator(std::function<bool(const T&)> validator);

private:
   class Impl;
   std::unique_ptr<Impl> p;
};

#ifdef SETTINGS_VARIABLE_IMPLEMENTATION
template class SettingsVariable<bool>;
template class SettingsVariable<int64_t>;
template class SettingsVariable<std::string>;

// Containers are not to be used directly
template class SettingsVariable<std::vector<int64_t>>;
#endif

} // namespace settings
} // namespace qt
} // namespace scwx