First cut of pulling out the relevant parts of my original game to make a little framework.

src/gui/loot_ui.hpp

@@ -0,0 +1,37 @@
+#pragma once
+#include "gui/guecstra.hpp"
+#include <SFML/Graphics/RenderWindow.hpp>
+#include <SFML/Graphics/Font.hpp>
+#include <guecs/ui.hpp>
+#include "events.hpp"
+#include "game/inventory.hpp"
+
+namespace gui {
+  class LootUI {
+    public:
+      bool active = false;
+      guecs::UI $gui;
+      DinkyECS::Entity $temp_loot = DinkyECS::NONE;
+      DinkyECS::Entity $target = DinkyECS::NONE;
+
+      LootUI();
+
+      void set_target(DinkyECS::Entity entity) {
+        $target = entity;
+      }
+
+      void init();
+      void update();
+      void render(sf::RenderWindow& window);
+      void update_level();
+      bool mouse(float x, float y, guecs::Modifiers mods);
+      void make_button(const std::string &name, const std::wstring& label, game::Event event);
+
+      void remove_slot(guecs::Entity slot_id);
+      bool place_slot(guecs::Entity gui_id, DinkyECS::Entity world_entity);
+      void add_loose_item(DinkyECS::Entity entity);
+      void drop_item(DinkyECS::Entity item_id);
+      bool occupied(guecs::Entity gui_id);
+      void swap(guecs::Entity gui_a, guecs::Entity gui_b);
+  };
+}