+
+using std::shared_ptr;
+using std::vector;
+
+namespace pv {
+namespace view {
+
+const vector< shared_ptr<RowItem> >& RowItemOwner::child_items() const
+{
+ return _items;
+}
+
+void RowItemOwner::clear_child_items()
+{
+ for (auto &i : _items) {
+ assert(i->owner() == this);
+ i->set_owner(nullptr);
+ }
+ _items.clear();
+}
+
+void RowItemOwner::add_child_item(std::shared_ptr<RowItem> item)
+{
+ assert(!item->owner());
+ item->set_owner(this);
+ _items.push_back(item);
+}
+
+void RowItemOwner::remove_child_item(std::shared_ptr<RowItem> item)
+{
+ assert(item->owner() == this);
+ item->set_owner(nullptr);
+ auto iter = std::find(_items.begin(), _items.end(), item);
+ assert(iter != _items.end());
+ _items.erase(iter);
+}
+
+} // view
+} // pv