Qtablewidgetitem characters that are not numbers can also be entered when editing by default. How

Qtablewidgetitem characters that are not numbers can also be entered when editing by default. How do I set a number that is not a numeric input? Qtablewidgetitem Default

Qtablewidgetitem characters that are not numbers can also be entered when editing by default. How do I set a number that is not a numeric input?
Qtablewidgetitem characters that are not numbers can also be entered when editing by default. How do I set a number that is not a numeric input?

[Workaround]
Qregexp ipregexp = Qregexp ("(2[0-4]\\d|25[0-5]|[ 01]?\\d\\d?) \\.) {4} ");
Qregexpvalidator *ipregexpvalidator = new Qregexpvalidator (ipregexp, this);
Iplineedit->setvalidator (Ipregexpvalidator);
Iplineedit->setinputmask ("000.000.000.000;");


This is the authentication method for IP you just change it. I never tried.
[Workaround]
LZ according to your requirements, I disguised the realization of the next, the idea is: first let the cell input any character, and then in judgment! If you do not determine the number, set the cell to: 0!
Processing judgment in cell cellchanged ();
The code is as follows:

C + + code

void mainwindow::on_tablewidget_cellchanged (int row, int column) {    if (column = = 1) return;    qtablewidgetitem* item = Ui->tablewidget->item (Row,column);    if (!item) return;    QString str = Item->text ();    Qregexp RxS ("^ ([1-9][0-9]*) $");    if (!rxs.exactmatch (str))    {        qmessagebox::about (this,tr ("Waring"), TR ("Please input diagtal");        Item->settext (QString ("0"));}    }

Qtablewidgetitem characters that are not numbers can also be entered when editing by default. How