please help me .. How Disable Move Focus / Cursor when Invalid input value ?

Hi All,
Please Helpme
I try create QtableWidget and QitemDelegate . ( QLineEdit )
how stop move cursor / focus when invalid input ? in QlineEdit
??

Probably, the easiest is to just setFlags on all the other cells:

Code:

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void DisableAllExceptOne(QTableWidget & tbl, const QTableWidgetItem & allowed)
{
    for (int i = 0; i < tbl.rowCount(); i++)
        for (int j = 0; j < tbl.columnCount(); j++)
            if (!(tbl.item(i, j)->row() == allowed.row() &&
                  tbl.item(i, j)->column() == allowed.column()))
                tbl.item(i, j)->setFlags(Qt::NoItemFlags);
}
 
int main(int argc, char * argv[])
{
    QApplication a(argc, argv);
 
    QTableWidget tbl;
    tbl.setRowCount(1);
    tbl.setColumnCount(3);
 
    QTableWidgetItem * item1 = new QTableWidgetItem("ONE");
    tbl.setItem(0, 0, item1);
 
    QTableWidgetItem * item2 = new QTableWidgetItem("TWO");
    tbl.setItem(0, 1, item2);
 
    QTableWidgetItem * item3 = new QTableWidgetItem("THREE");
    tbl.setItem(0, 2, item3);
 
    DisableAllExceptOne(tbl, *item1);
    tbl.show();
 
    return a.exec();
}

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great i'll try ..