C++ Qt QTableWidget Checkbox get state and location

How to get state of all checkbox and get row and column of checked? Onclick PushButton function.

    QTableWidget *t = ui->tableWidget;
    t->setRowCount(2);
    t->setColumnCount(2);

    QStringList tableHeader;
    tableHeader<<"item01"<<"item02";
    t->setHorizontalHeaderLabels(tableHeader);

    for (int i = 0; i < t->rowCount(); i++) {
        for (int j = 0; j < t->columnCount(); j++) {
            QWidget *pWidget = new QWidget();
            QHBoxLayout *pLayout = new QHBoxLayout(pWidget);
            QCheckBox *pCheckBox = new QCheckBox();
            pLayout->setAlignment(Qt::AlignCenter);
            pLayout->setContentsMargins(0,0,0,0);
            pLayout->addWidget(pCheckBox);
            pWidget->setLayout(pLayout);
            t->setCellWidget(i, j, pWidget);
        }
    }

And when I clicked the button, I need get all selected elements with rows, columns of each.

void Widget::on_pushButton_clicked()
{

    // Code here    

    // For example: Selected ["item01", 2]
}