setdata

// I have a class as follows (the MyTreeItem class does not inherit QObject).

class MyTreeItem
{
    // ...
};

Q_DECLARE_METATYPE(MyTreeItem)

// I'm trying to add an item to my treeview, but not sure how to construct this class with
// QVariant which is what QVariant::setData takes ...

    bool QAbstractItemModel::setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole)

// And here is how I'm trying to add an item to my tree ...

    QList<QVariant> name;
    name << new_name << "";

    const QModelIndex parent = treeModel->index(0, 0);

    MyTreeItem *newItem = new MyTreeItem(name);

    treeModel->insertRow(0, parent);

    treeModel->setData(treeModel->index(0, 0, parent), QVariant(newItem));

/* The error I get in setData above is ...

error: use of deleted function ‘QVariant::QVariant(void*)’ treeModel->setData(treModel->index(0, 0, parent), QVariant(newItem));
                ^

*/