I hope that 'll be useful .
That's Code I use to filter JPG & set the path @ a Label :

Qt Code: 
  1. QFileDialog::Options options;
  2.  
  3.          options |= QFileDialog::DontUseNativeDialog;
  4.          QString selectedFilter;
  5.  
  6.          QString fileName = QFileDialog::getOpenFileName(this,
  7.                                  tr("Open"),
  8.                                  formTwo.lblSelectedFilePath->text(),
  9.                                  tr("JPEG (*.JPG)"),
  10.                                  &selectedFilter,
  11.                                  options);
  12.  
  13.  
  14.           if (!fileName.isEmpty())
  15.          formTwo.lblSelectedFilePath->setText(fileName);
To copy to clipboard, switch view to plain text mode