- const shared_ptr<RowItem> first_row_item(
- _drag_row_items.front().first);
- for (const auto &r : _drag_row_items) {
- const shared_ptr<RowItem> row_item(r.first);
- assert(row_item);
-
- if (row_item->owner() != first_row_item->owner())
- return;
- }
+ RowItemOwner *item_owner = nullptr;
+ for (shared_ptr<RowItem> r : _view)
+ if (r->dragging()) {
+ if (!item_owner)
+ item_owner = r->owner();
+ else if(item_owner != r->owner())
+ return;
+ }
+
+ if (!item_owner)
+ return;