updating a column rows (condition Barcode) using QMap<QString,Int>

[Proton Phoenix]

Hi ~~
I have a problem Scanning Barcodes ... I want when the user scan a product twice or more it i will add +1 to the quantity column of that product (Barcode,QR Code) each time even if the user scan it and scan other products and he scan it again ..
note: i don't have problem receiving data from barcode scanner

QMap<QString,int> countOfStrings;


     for(int i=0;i<BarcodeScanValues.count();i++)
     {
         countOfStrings[BarcodeScanValues[i]]++;
     }
qDebug()<<countOfStrings;

    qDebug()<<countOfStrings.values();

    qDebug()<<countOfStrings.keys();

    ProductCounter=countOfStrings.values();  // QStringList
    productBarcode=countOfStrings.keys();

/* 
("7613036309493", "4600680000640", "8133578000377", "7613036445818", "7613036445818")


QMap(("4600680000640", 1)("8133578000377", 1)("7613036309493", 1)("7613036445818", 2))


(1, 1, 1, 2)
("4600680000640", "6133978000377", "7613036309493", "7613036445818")

*/

any idea about this algorithm how to use this to update QTablewidget ? many thanks <3
![](

this picture is quite similar to the one i have only i don't have widget all are QTablewidget cells and i have a Barcode column so the algorithm should find the barcode inside the table if it's already exist it add +1 to it's row quantity and it update the price ...
any advices? or i must save as temp database? then updating values?

[ChrisW67]

QTableWidget maintains an internal QAbstractItemModel that contains the data that is being presented. You can use QAbstractItemModel::match() to find the QModelIndex of items matching a value. So, something like this (untested):

QAbstractItemModel *model = tableWidget->model();

QModelIndex startIndex = model->index(0, barcodeColumnNumber);
QModelIndexList matches = model->match(startIndex, Qt::EditRole, barcodeValue, 1, Qt::MatchExactly);
if (matches.count() > 0) {
  QModelIndex match = matches.at(0);
  match = match.siblingAtColumn(countColumn);
  int count = match.data(Qt::EditRole).toInt() + 1;
  model->setData(match, count);
}

[Proton Phoenix]

Thank You so much Bro You Are Life Save I wish All the best happy life for you <3

note : it works better than i ever imagine <3