connect not working with manually created object

QObject::connect isn't working for me if I create the object in C++. It does work if I add it in QT designer though. Doesn't make sense. What am I doing wrong?

CPP:

Code:

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QTableView *tableWidget = new QTableView(this);
tableWidget->setObjectName(QString::fromUtf8("tableView"));
tableWidget->setModel(&model);
tableWidget->setAttribute(Qt::WA_DeleteOnClose, true);
tableWidget->setSelectionMode(QAbstractItemView::SingleSelection);
tableWidget->setSelectionBehavior(QAbstractItemView::SelectColumns);
QObject::connect(tableWidget, SIGNAL(clicked(QModelIndex)), this, SLOT(on_tableView_clicked(QModelIndex)));

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Header file:

Code:

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public slots:
		void on_tableView_clicked(QModelIndex idx);

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When I run it it says:

Quote:

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QMetaObject::connectSlotsByName: No matching signal for on_tableView_clicked(QModelIndex)

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I see the problem. It works if click a cell in the table, but not the column header, which is what I want. Is there a signal for this?

Found it, it's sectionClicked on the horizontalHeader()