Trouble with Qtreeview and QCheckboxes

[denumbaone]

I'm trying to get checkboxes into my treeview and can't quite get it to work. I've looked around and can't find anything to solve my problem. I've attached the code that I have so far, but doesn't work:

QTreeWidgetItem *cities = new QTreeWidgetItem(treeWidget);
cities->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
cities->setText(0, tr("Places"));
 
(new QTreeWidgetItem(cities))->setText(0, tr("USA Cities"));

QTreeWidgetItem *cities = new QTreeWidgetItem(treeWidget);
cities->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
cities->setText(0, tr("Places"));

(new QTreeWidgetItem(cities))->setText(0, tr("USA Cities"));

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Thank you in advance for your help