Question

If I load a text file into a QTextStream, how would I then populate a TableWidget with its data? The text file is tab delimited. Here is what I have so far:

void MainWindow::startParsing()
{
            QStringList stringList;

            int countRows;

             QTextStream in(&textFile);
             QString line;
             if (textFile.open(QIODevice::ReadOnly))
             {
             do
             {
                 line = in.readLine();
                 stringList << line.split("\t", QString::SkipEmptyParts);
             }
             while (!in.atEnd());
             }

             QSet<QString> set = stringList.toSet();
             foreach (const QString &value, set)
                 qDebug() << value;


            countRows = stringList.count();

            //--- define the table's shape ---
            ui->tableWidget_inputPreview->setRowCount(countRows);
            ui->tableWidget_inputPreview->setColumnCount(6);

            //--- create the horizontal (column) headers ---
            QStringList horzHeaders;
            horzHeaders << "HostName" << "Host IP" << "Area" << "Host Interface"
                        << "Router to Ext Network" << "Ext Routes";
            ui->tableWidget_inputPreview->setHorizontalHeaderLabels( horzHeaders );

            //--- create the vertical (row) headers ---
            QStringList vertHeaders;
            ui->tableWidget_inputPreview->setVerticalHeaderLabels( vertHeaders );

            //--- populate the table widget with data from txt file ---

            // TODO: insert data into table
}

Here is a sample of the text file that I’m working with:

#TEST 1                 
#HostName   HostIP  Area    Host Interface  Router to Ext NW    Number of Ext Routes
test1   9.1.1.1 0.0.0.0         
OMG_LOL_101 128.12.101.2    0.0.0.0         
OMG_LOL_102 128.12.102.9    0.0.0.0 128.112.102.9   128.112.102.10  100
WTF_BBQ_149 128.20.180.2    0.0.0.0                 

#HITL 2                 
#HostName   HostIP  Area    Host Interface  Router to Ext NW    Number of Ext Routes
test2   9.1.1.2 0.0.0.0         
WTF_BBQ_111 128.15.110.2    0.0.0.0         
WTF_BBQ_112 128.15.111.2    0.0.0.0         
WTF_BBQ_113 128.15.112.2    0.0.0.0 128.115.112.9   128.115.112.10  100

Answer 1

QTextStream in(&file);
QList< QStringList > lists;
QString line;
do {
    line = in.readLine();
    lists << line.split("\t");
} while (!line.isNull())

// Set the table size (assuming the rows are all the same length).
tableWidget.setRowCount( lists.size() );
tableWidget.setColumnCount( lists[0].size() );

for ( int row = 0; row < lists.size(); ++row ) {
    for ( int column = 0; column < lists[row].size(); ++column ) {
        tableWidget.setItem(row, column, new QTableWidgetItem(lists[row][column]));
    }
}