Add unit settings

scwx-qt/source/scwx/qt/settings/unit_settings.hpp

@@ -0,0 +1,43 @@
+#pragma once
+
+#include <scwx/qt/settings/settings_category.hpp>
+#include <scwx/qt/settings/settings_variable.hpp>
+
+#include <memory>
+#include <string>
+
+namespace scwx
+{
+namespace qt
+{
+namespace settings
+{
+
+class UnitSettings : public SettingsCategory
+{
+public:
+   explicit UnitSettings();
+   ~UnitSettings();
+
+   UnitSettings(const UnitSettings&)            = delete;
+   UnitSettings& operator=(const UnitSettings&) = delete;
+
+   UnitSettings(UnitSettings&&) noexcept;
+   UnitSettings& operator=(UnitSettings&&) noexcept;
+
+   SettingsVariable<std::string>& accumulation_units() const;
+   SettingsVariable<std::string>& echo_tops_units() const;
+   SettingsVariable<std::string>& speed_units() const;
+
+   static UnitSettings& Instance();
+
+   friend bool operator==(const UnitSettings& lhs, const UnitSettings& rhs);
+
+private:
+   class Impl;
+   std::unique_ptr<Impl> p;
+};
+
+} // namespace settings
+} // namespace qt
+} // namespace scwx