Hello friends,

I try a little routine to fill up a tableview from a textfile.

Qt Code: 
  1. //**************************************************************************
  2. void Window::openFileInTable(const QModelIndex & index )
  3. //**************************************************************************
  4. {
  5.  
  6.     int digits[6];
  7.     int iSegCount(0);
  8.     int iCopyFLines(0);
  9.     QString selectedFile;
  10. 	if ( index.isValid())
  11. 	{
  12. 		 selectedFile = model->filePath( index );
  13. 		 selectedFile.replace(QString("/"),QString("\\"));
  14.         bodyEdit->clear();
  15.         bodyEdit->append(selectedFile);
  16.  
  17.         QFile file(selectedFile);
  18.         if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
  19.             return;
  20.         int fileLines(1);
  21.         QTextStream InputDataFile(&file);
  22.         while (!InputDataFile.atEnd()) {
  23.             InputDataFile.readLine();
  24.             fileLines++;
  25.          }
  26.         file.close();
  27.         QTextStream InputDataFile(&file);
  28.         if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
  29.             return;
  30.         QStringList buffer_list;
  31.         QString Delimiter(";");
  32.         tableModel = new QStandardItemModel;
  33.         tableModel->setRowCount(0) ;
  34.         int Max_Number_of_Columns(36);
  35.         int Max_Number_of_Lines(0);
  36.         tableModel->setColumnCount(Max_Number_of_Columns + 3) ;
  37.         progressDialog->setMaximum(fileLines);
  38.         for(iSegCount=0;iSegCount<6;iSegCount++){digits[iSegCount]=0;}
  39.         QString buf;
  40.         while (!InputDataFile.atEnd())
  41.         {
  42.             buf = InputDataFile.readLine();
  43.             buffer_list = buf.split(Delimiter);
  44.  
  45.             for (int column = 0; column <= Max_Number_of_Columns; column ++)
  46.             {
  47.                 QStandardItem * item = new QStandardItem(buffer_list[column]);
  48.                 tableModel->setItem(Max_Number_of_Lines, column, item) ;
  49.             }
  50.             Max_Number_of_Lines++;
  51.             progressDialog->setLabelText(tr("Transfer %1...").arg(selectedFile));
  52.             progressDialog->setWindowModality(Qt::WindowModal);
  53.             progressDialog->setValue(Max_Number_of_Lines);
  54.  
  55.         }
  56.         iCopyFLines=Max_Number_of_Lines;
  57.         iSegCount = 0;
  58.                     do {
  59.                         digits[iSegCount++] = iCopyFLines % 10;
  60.                     } while ((iCopyFLines /= 10) > 0);
  61.             progressCountEiner->setNumber(digits[0]);
  62.             progressCountZehner->setNumber(digits[1]);
  63.             progressCountHunderter->setNumber(digits[2]);
  64.             progressCountTausender->setNumber(digits[3]);
  65.             progressCountZehnTausender->setNumber(digits[4]);
  66.             progressCountHundertTausender->setNumber(digits[5]);
  67.  
  68.         progressDialog->setValue(fileLines);
  69.         trackView->setAutoFillBackground(true);
  70.         trackView->setAlternatingRowColors(true);
  71.         trackView->resizeColumnsToContents();
  72.         trackView->setModel(tableModel);
  73.         trackView->show() ;
  74.     }
  75.  
  76. }
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What I detect is that the bigger the textfile is the greater the memory consumption is.

The problem I think is the for loop:
Qt Code: 
  1. for (int column = 0; column <= Max_Number_of_Columns; column ++)
  2.             {
  3.                 QStandardItem * item = new QStandardItem(buffer_list[column]);
  4.                 tableModel->setItem(Max_Number_of_Lines, column, item) ;
  5.             }
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Have somebody a tip to filling up my tableview with better performance or lower memory consumption ..???