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#ifndef GUI_ISTATESETTINGS_H
#define GUI_ISTATESETTINGS_H
#include <concepts>
namespace GUI
{
template <class W>
class IStateSettings
{
public:
virtual void saveState(const W* widget) = 0;
virtual void restoreState(W* widget) const = 0;
};
template <class W>
class [[nodiscard]] StateSaver final
{
public:
StateSaver(IStateSettings<W>& s, W* w) : m_Settings{s}, m_Widget{w}
{
m_Settings.restoreState(m_Widget);
}
StateSaver(const StateSaver<W>&) = delete;
StateSaver(StateSaver<W>&&) = delete;
~StateSaver() { m_Settings.saveState(m_Widget); }
StateSaver<W>& operator=(const StateSaver<W>&) = delete;
StateSaver<W>& operator=(StateSaver<W>&&) = delete;
private:
IStateSettings<W>& m_Settings;
W* m_Widget;
};
template <class W, class I = IStateSettings<W>>
StateSaver(I&, W*) -> StateSaver<W>;
} // namespace GUI
#endif // GUI_ISTATESETTINGS_H
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