Better organization.

include/gui/gui.hpp

@@ -0,0 +1,32 @@
+#ifndef BILLYSHEET_GUI_HPP
+#define BILLYSHEET_GUI_HPP
+
+#include <filesystem>
+
+namespace fs = std::filesystem;
+
+namespace gui {
+
+	class GuiData;
+
+	class Gui final {
+	private:
+		GuiData &data;
+
+		fs::path font;
+
+		bool initialized{ false };
+	public:
+		Gui() = delete;
+
+		explicit Gui(GuiData &data);
+
+		~Gui() noexcept;
+
+		void render_gui();
+
+		void render_gpu() const;
+	};
+}
+
+#endif //BILLYSHEET_GUI_HPP