Qt Code: 
  1. void MainWindow::getFormdetails()
  2.  {
  3.       fd = new formDialog();
  5.  
  6.       if(fd->exec() == 1)
  7.      {
  8.          data = fd->returnFormdata();
  9.          qDebug() << data;
  10.        }
  11.  }
  12.  
  13. formDialog::formDIalog()
  14. {
  15.   connect(okButton, SIGNAL(clicked()), this, SLOT(formFieldCheck()));
  16.    //connect(okButton, SIGNAL(clicked()), this, SLOT(accept()));
  17.    connect(cancelButton, SIGNAL(clicked()), this, SLOT(reject()));
  18. }
  19. void formDialog::formFieldCheck()
  20. {
  21.      if(formLedit[0]->text().isEmpty() || formLedit[1]->text().isEmpty())
  22.         {  QMessageBox::information(this, tr("Empty Field"),
  23.                                     tr("Please enter a name."));
  24.  
  25.             }
  26.         else {list.append(formLedit[0]->text());
  27.             list.append(formLedit[1]->text());
  28.             list.append(age->text());
  29.             list.append(gender->currentText());
  30.             accept(); // Call accept here
  31.             //this->hide();
  32.     }
  33. }
  34.  
  35. QStringList formDialog::returnFormdata()
  36. {
  37.     return list;
  38. }
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