This is a project from university, I have to make a “paint” and now I am stuck at making copying and pasting. shape is an abstract class from which other real shapes like Rectangle and Circle are inherited.

    std::shared_ptr<shape> m_selectedShape = nullptr;
    std::shared_ptr<shape> m_copiedShape = nullptr;

        ...
        else if ((event->key() == Qt::Key_C) && (event->modifiers() == Qt::ControlModifier)){
            if(m_selectedShape != nullptr){
                m_copiedShape = m_selectedShape;
            }

            update();
        }
        else if ((event->key() == Qt::Key_V) && (event->modifiers() == Qt::ControlModifier)){
            if(m_copiedShape != nullptr){
                //How?
            }

            update();
        }
        ...

I tried using make_shared but as the shared_ptr are shape, which is an abstract class, I can not.