Can now drag an item out of inventory and drop on the ground, then pick it back up, and put it in a loot container, and then back again. Still buggy but working for now.

gui/dnd_loot.cpp

@@ -114,6 +114,8 @@ namespace gui {
       case MOUSE_DROP: {
         auto& grab = $status_ui.$gui.get<guecs::GrabSource>(*$grab_source);
         grab.commit();
+        bool dropped = $status_ui.drop_item(grab.world_entity);
+        dbc::check(dropped, "DROP FAILED!");
         END(Event::CLOSE);
        } break;
       default:

gui/fsm.cpp

@@ -68,6 +68,8 @@ namespace gui {
     $mini_map.init($main_ui.$overlay_ui.$gui);
 
     run_systems();
+
+    this_crap_must_die();
     state(State::IDLE);
   }
 
@@ -430,7 +432,8 @@ namespace gui {
           event(Event::START_COMBAT);
           break;
         case eGUI::ENEMY_SPAWN:
-          $main_ui.update_level($level);
+          $main_ui.$rayview.update_level($level);
+          $main_ui.dirty();
           run_systems();
           break;
         case eGUI::NO_NEIGHBORS:
@@ -514,4 +517,10 @@ namespace gui {
 
     run_systems();
   }
+
+  void FSM::this_crap_must_die() {
+    auto torch_id = System::spawn_item($level, "TORCH_BAD");
+    auto hand_l = $status_ui.$gui.entity("hand_l");
+    $status_ui.place_slot(hand_l, torch_id);
+  }
 }

gui/fsm.hpp

@@ -79,5 +79,6 @@ namespace gui {
       void handle_world_events();
       void next_level();
       void debug_render();
+      void this_crap_must_die();
   };
 }

gui/status_ui.cpp

@@ -4,6 +4,7 @@
 #include "rand.hpp"
 #include <fmt/xchar.h>
 #include "gui/guecstra.hpp"
+#include "systems.hpp"
 
 namespace gui {
   using namespace guecs;
@@ -85,7 +86,7 @@ namespace gui {
     init();
   }
 
-  bool StatusUI::place_slot(DinkyECS::Entity gui_id, DinkyECS::Entity world_entity) {
+  bool StatusUI::place_slot(guecs::Entity gui_id, DinkyECS::Entity world_entity) {
     if($level.world->has<components::Sprite>(world_entity)) {
       auto& sprite = $level.world->get<components::Sprite>(world_entity);
       $gui.set_init<guecs::Sprite>(gui_id, {sprite.name});
@@ -101,7 +102,11 @@ namespace gui {
     }
   }
 
-  void StatusUI::remove_slot(DinkyECS::Entity slot_id) {
+  bool StatusUI::drop_item(DinkyECS::Entity item_id) {
+    return System::drop_item($level, item_id);
+  }
+
+  void StatusUI::remove_slot(guecs::Entity slot_id) {
     if(contents.contains(slot_id)) {
       contents.erase(slot_id);
       $gui.remove<guecs::GrabSource>(slot_id);

gui/status_ui.hpp

@@ -12,7 +12,7 @@ namespace gui {
     public:
       guecs::UI $gui;
       GameLevel $level;
-      std::unordered_map<DinkyECS::Entity, DinkyECS::Entity> contents;
+      std::unordered_map<guecs::Entity, DinkyECS::Entity> contents;
       ritual::UI $ritual_ui;
 
       StatusUI(GameLevel level);
@@ -23,7 +23,8 @@ namespace gui {
       void update();
       bool mouse(float x, float y, bool hover);
 
-      void remove_slot(DinkyECS::Entity slot_id);
-      bool place_slot(DinkyECS::Entity gui_id, DinkyECS::Entity world_entity);
+      void remove_slot(guecs::Entity slot_id);
+      bool place_slot(guecs::Entity gui_id, DinkyECS::Entity world_entity);
+      bool drop_item(DinkyECS::Entity item_id);
   };
 }

systems.cpp

@@ -460,3 +460,35 @@ std::shared_ptr<sf::Shader> System::sprite_effect(GameLevel &level, DinkyECS::En
     return nullptr;
   }
 }
+
+DinkyECS::Entity System::spawn_item(GameLevel& level, const std::string& name) {
+  Config config("assets/items.json");
+  auto& item_config = config[name];
+  auto item_id = level.world->entity();
+  level.world->set<InventoryItem>(item_id, {1, item_config});
+  components::configure_entity(*level.world, item_id, item_config["components"]);
+
+  return item_id;
+}
+
+bool System::drop_item(GameLevel& level, DinkyECS::Entity item) {
+  auto& world = *level.world;
+  auto& map = *level.map;
+  auto& collision = *level.collision;
+
+  auto player = world.get_the<Player>();
+  auto player_pos = world.get<Position>(player.entity);
+
+  // doesn't compass already avoid walls?
+  for(matrix::box it{map.walls(), player_pos.location.x, player_pos.location.y, 1}; it.next();) {
+    Position pos{it.x, it.y};
+    if(map.can_move(pos.location) && !collision.occupied(pos.location)) {
+      world.set<Position>(item, pos);
+      collision.insert(pos.location, item);
+      level.world->send<Events::GUI>(Events::GUI::ENEMY_SPAWN, item, {});
+      return true;
+    }
+  }
+
+  return false;
+}

systems.hpp

@@ -18,6 +18,8 @@ namespace System {
   void device(DinkyECS::World &world, DinkyECS::Entity actor, DinkyECS::Entity item);
   void plan_motion(DinkyECS::World& world, Point move_to);
   std::wstring draw_map(GameLevel level, size_t view_x, size_t view_y, int compass_dir);
+  DinkyECS::Entity spawn_item(GameLevel& level, const std::string& name);
+  bool drop_item(GameLevel& level, DinkyECS::Entity item);
 
   void enemy_ai(GameLevel &level);
   void combat(GameLevel &level, int attack_id);