Hello!
In my program this function below is called once when I opened.
It read the file and updates the QLabel "title" with setText().

Qt Code: 
  1. void Mpl::updateFiles()
  2. {
  3.  
  4.     QFile file("mpl.dat");
  5.     if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
  6.          return;
  7.  
  8.      QTextStream in(&file);
  9.      QApplication::setOverrideCursor(Qt::WaitCursor);
  10.      while (!in.atEnd()) {
  11.          QString line = in.readLine();
  12.          uplist << line;
  13.      }
  14.      QApplication::restoreOverrideCursor();
  15.      file.close();
  16.      if (uplist.count() == 3){
  17.        title->setText(uplist.at(0));
  18.        path = uplist.at(1);
  19.        path2 = uplist.at(2);
  20.      }else{
  21.         QMessageBox::warning(this, "Error reading File",
  22.                                   "The file should contain: name of the project and paths.");
  23.      }
  24. }
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In the programme it is possible to change the file "mpl.dat". Then the user can click a QPushButton and call updateFiles () again. But the upgrade of QLabel "title" does not occur.
Someone help me, please?
Thanks