You can grab stuff off the ground and put in your inventory but it doesn't show the sprite while you do it yet.

gui/dnd_loot.cpp

@@ -1,3 +1,4 @@
+#define FSM_DEBUG 1
 #include "gui/guecstra.hpp"
 #include "gui/dnd_loot.hpp"
 #include "gui/uisystems.hpp"
@@ -19,6 +20,7 @@ namespace gui {
       FSM_STATE(DNDState, LOOTING, ev, data);
       FSM_STATE(DNDState, LOOT_GRAB, ev, data);
       FSM_STATE(DNDState, INV_GRAB, ev, data);
+      FSM_STATE(DNDState, ITEM_PICKUP, ev, data);
       FSM_STATE(DNDState, END, ev);
     default:
       dbc::log(fmt::format("event received with data but state={} is not handled", int($state)));
@@ -105,15 +107,35 @@ namespace gui {
     }
   }
 
-  void DNDLoot::END(Event ev) {
+  void DNDLoot::ITEM_PICKUP(Event ev, std::any data) {
     using enum Event;
 
     switch(ev) {
+      case INV_SELECT:
+        if(UISystem::loot_drop($loot_ui.$gui,
+              $status_ui.$gui, $grab_source, data))
+        {
+          state(DNDState::END);
+        }
+        break;
       case LOOT_ITEM:
-        $loot_ui.active = true;
-        $grab_source = std::nullopt;
-        state(DNDState::LOOTING);
+        dbc::log("PUT IT BACK!");
         break;
+      default:
+         handle_mouse(ev, $loot_ui.$gui);
+    }
+  }
+
+  void DNDLoot::END(Event ev) {
+    using enum Event;
+
+    switch(ev) {
+      case LOOT_ITEM: {
+          // NOTE: if > 1 items, go to LOOT_OPEN instead
+          auto gui_id = $loot_ui.$gui.entity("item_0");
+          $grab_source = UISystem::loot_grab($loot_ui.$gui, gui_id);
+          if($grab_source) state(DNDState::ITEM_PICKUP);
+        } break;
       case LOOT_OPEN:
         $loot_ui.active = true;
         $grab_source = std::nullopt;
@@ -144,6 +166,7 @@ namespace gui {
       case MOUSE_DRAG:
       case MOUSE_MOVE: {
            if($grab_source) {
+             fmt::println("MOVING that thing");
              auto& source = gui.get<guecs::GrabSource>(*$grab_source);
              source.move($window.mapPixelToCoords($router.position));
            }

gui/dnd_loot.hpp

@@ -11,7 +11,8 @@ namespace gui {
     LOOTING=101,
     LOOT_GRAB=102,
     INV_GRAB=103,
-    END=104
+    ITEM_PICKUP=104,
+    END=105
   };
 
   class DNDLoot : public DeadSimpleFSM<DNDState, Event> {
@@ -33,6 +34,7 @@ namespace gui {
       void LOOT_GRAB(Event ev, std::any data);
       void INV_GRAB(Event ev, std::any data);
       void END(Event ev);
+      void ITEM_PICKUP(Event ev, std::any data);
       void handle_mouse(Event ev, guecs::UI& gui);
       void mouse_action(bool hover);
       sf::Vector2f mouse_position();