QGraphicsItem: parentItem() ou parentWidget()

class GraphicsItem : public anax::Component
{
public:
    GraphicsItem() = default;

    ///
    /// \brief GraphicsItem
    /// \param _item
    ///
    /// GraphicsItem takes ownership of _item
    ///

    GraphicsItem(QGraphicsItem* _item) : item(_item) {}
    ~GraphicsItem()
    {
        if (item != nullptr)
        {
            if (item->parentItem() == 0)
            {
                delete item;
            }
        }
    }

    QGraphicsItem* item{};
};