UI

Add dial and thermo

src/UI/UI_dial.hpp

@@ -0,0 +1,21 @@
+#pragma once
+#include "UI_item.hpp"
+
+#define UI_DIAL_TYPE std::string("UI_dial")
+
+class UI_dial : public UI_item
+{
+    public:
+        UI_dial(std::string id, std::string text, Color fg_color, Color bg_color, double min, double max, double value);
+        UI_dial(const json& j);
+
+        void set_value(double value) override;
+        double value() const;
+
+        void from_json(const json& j) override;
+        json to_json() const override;
+    private:
+        double m_min;
+        double m_max;
+        double m_value;
+};