Exit drag-and-drop if dragged item is deleted (Fixes #3097)

apps/openmw/mwgui/draganddrop.cpp

@@ -121,6 +121,12 @@ void DragAndDrop::drop(ItemModel *targetModel, ItemView *targetView)
     mSourceView->update();
 }
 
+void DragAndDrop::onFrame()
+{
+    if (mIsOnDragAndDrop && mItem.mBase.getRefData().getCount() == 0)
+        finish();
+}
+
 void DragAndDrop::finish()
 {
     mIsOnDragAndDrop = false;

apps/openmw/mwgui/draganddrop.hpp

@@ -29,6 +29,7 @@ namespace MWGui
 
         void startDrag (int index, SortFilterItemModel* sortModel, ItemModel* sourceModel, ItemView* sourceView, int count);
         void drop (ItemModel* targetModel, ItemView* targetView);
+        void onFrame();
 
         void finish();
     };

apps/openmw/mwgui/windowmanagerimp.cpp

@@ -876,11 +876,7 @@ namespace MWGui
             MWBase::StateManager::State_NoGame)
             return;
 
-        if (mDragAndDrop->mIsOnDragAndDrop)
-        {
-            assert(mDragAndDrop->mDraggedWidget);
-            mDragAndDrop->mDraggedWidget->setPosition(MyGUI::InputManager::getInstance().getMousePosition());
-        }
+        mDragAndDrop->onFrame();
 
         updateMap();