From 1b653c7c1a3e6c5d7b2739f881ea6b11ca46cd3b Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Fri, 30 Oct 2015 00:11:35 +0300
Subject: Allow add item by drag&drop into npc inventory to exact position.

---
 src/gui/widgets/itemcontainer.cpp |  5 +++--
 src/gui/windows/npcdialog.cpp     |  2 +-
 src/inventory.cpp                 | 42 ++++++++++++++++++++++++++++-----------
 src/inventory.h                   |  3 ++-
 4 files changed, 36 insertions(+), 16 deletions(-)

diff --git a/src/gui/widgets/itemcontainer.cpp b/src/gui/widgets/itemcontainer.cpp
index 8fc8b09e4..fec14b814 100644
--- a/src/gui/widgets/itemcontainer.cpp
+++ b/src/gui/widgets/itemcontainer.cpp
@@ -631,8 +631,9 @@ void ItemContainer::mouseReleased(MouseEvent &event)
             inventory = PlayerInfo::getInventory();
             if (inventory)
             {
-                mInventory->addVirtualItem(inventory->getItem(
-                    dragDrop.getTag()));
+                mInventory->addVirtualItem(
+                    inventory->getItem(dragDrop.getTag()),
+                    getSlotIndex(event.getX(), event.getY()));
             }
             return;
         }
diff --git a/src/gui/windows/npcdialog.cpp b/src/gui/windows/npcdialog.cpp
index 5cc538e34..f601c6405 100644
--- a/src/gui/windows/npcdialog.cpp
+++ b/src/gui/windows/npcdialog.cpp
@@ -542,7 +542,7 @@ void NpcDialog::action(const ActionEvent &event)
     else if (eventId == "add")
     {
         if (inventoryWindow)
-            mInventory->addVirtualItem(inventoryWindow->getSelectedItem());
+            mInventory->addVirtualItem(inventoryWindow->getSelectedItem(), 0);
     }
     else if (eventId.find("skin_") == 0)
     {
diff --git a/src/inventory.cpp b/src/inventory.cpp
index eecaacd6c..c91a7411a 100644
--- a/src/inventory.cpp
+++ b/src/inventory.cpp
@@ -362,24 +362,42 @@ int Inventory::findIndexByTag(const int tag) const
     return -1;
 }
 
-void Inventory::addVirtualItem(const Item *const item)
+void Inventory::addVirtualItem(const Item *const item,
+                               int index)
 {
     if (item && !PlayerInfo::isItemProtected(item->getId()))
     {
         if (findIndexByTag(item->getInvIndex()) != -1)
             return;
 
-        const int index = addItem(item->getId(),
-            item->getType(),
-            1,
-            1,
-            item->getColor(),
-            item->getIdentified(),
-            item->getDamaged(),
-            item->getFavorite(),
-            Equipm_false,
-            Equipped_false);
-            Item *const item2 = getItem(index);
+        if (index >= 0 && index < mSize && mItems[index] == nullptr)
+        {
+            setItem(index,
+                item->getId(),
+                item->getType(),
+                1,
+                1,
+                item->getColor(),
+                item->getIdentified(),
+                item->getDamaged(),
+                item->getFavorite(),
+                Equipm_false,
+                Equipped_false);
+        }
+        else
+        {
+            index = addItem(item->getId(),
+                item->getType(),
+                1,
+                1,
+                item->getColor(),
+                item->getIdentified(),
+                item->getDamaged(),
+                item->getFavorite(),
+                Equipm_false,
+                Equipped_false);
+        }
+        Item *const item2 = getItem(index);
         if (item2)
             item2->setTag(item->getInvIndex());
     }
diff --git a/src/inventory.h b/src/inventory.h
index e20010c23..1d1f49ebe 100644
--- a/src/inventory.h
+++ b/src/inventory.h
@@ -174,7 +174,8 @@ class Inventory final
 
         int findIndexByTag(const int tag) const;
 
-        void addVirtualItem(const Item *const item);
+        void addVirtualItem(const Item *const item,
+                            int index);
 
     protected:
         typedef std::list<InventoryListener*> InventoryListenerList;
-- 
cgit v1.2.3-70-g09d2