Hi, I'm new to programming in Qt and I'm having problems using the TableWidget. I first initialize the QTableWidget pointer in my MainWindow constructor to have a number of rows and columns, but once I try to initialize selected items in a loop, it doesn't work. I tried disabling the sorting option but it didn't help either. I tried setting a single item outside the loop and it worked fine. Here's the code:

Qt Code: 
  1. MainWindow::MainWindow(QWidget *parent) :
  2.     QMainWindow(parent),
  3.     ui(new Ui::MainWindow)
  4. {
  5.     ui->setupUi(this);
  6.     this->showMaximized();
  7.     tab = new QTableWidget(10,10, this);
  8.     this->setCentralWidget(tab);
  9.     tab->setSortingEnabled(false);
  10. }
  11.  
  12. void MainWindow::on_actionShow_dialog_window_triggered()
  13. {
  14.     foreach( QTableWidgetItem *i, tab->selectedItems() )
  15.     {
  16.         if(i)
  17.         {
  18.             i->setText("AAAA");
  19.         }
  20.         else
  21.         {
  22.             tab->setItem(i->row(), i->column(),  new QTableWidgetItem( "BBB" ));
  23.         }
  24.  
  25.     }
  26.     tab->setItem(3, 3, new QTableWidgetItem( "CCC" ) );
  27. }
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Is it just one of those things that can't be done in a loop? How should I load some data out of a file and put it inside the table properly?