Save file

/! [9]
bool MainWindow::save()
//! [9] //! [10]
{
    if (curFile.isEmpty()) {
        return saveAs();
    } else {
        return saveFile(curFile);
    }
}
//! [10]

//! [11]
bool MainWindow::saveAs()
//! [11] //! [12]
{
    QString fileName = QFileDialog::getSaveFileName(this);
    if (fileName.isEmpty())
        return false;

    return saveFile(fileName);
}