QTableView and QCheckBox how to select cell value?

Question

Qt

There is a code that draws a QTableView and checkboxes are drawn in the first column in a cycle, and rows are loaded in the second column. I need to copy the lines that are selected by the checkbox. I read about diligates, but did not find what I need.
here is the code

QFile file("test.txt");
    if (file.open(QIODevice::ReadOnly | QIODevice::Text)) {

        QTextStream str(&file);

        quint64 linecount = 0x00;

        QString line;
        QDataStream in;
        
        while (!str.atEnd()) {
            itemCheck = new QStandardItem();
            itemCheck->setCheckable(true);
            iModel->setItem(linecount, 0, itemCheck);
            
            QString line = str.readLine();
            item = new QStandardItem(line);
            iModel->setItem(linecount, 1, item);
            linecount++;
        }

        
        tabl->setModel(iModel);
        tabl->resizeColumnsToContents();
        tabl->resizeRowsToContents();
    }

Answer 1

the delegate is responsible for the visual part of the table.
you need to redefine your table model.
In the general case, you override the setData method in the model, which edits your data structure, and there you then get the data of the required column or row.