// cUConvMainWindow class constructor
//--------------------------------------------------------------------------------------
cUConvMainWindow::cUConvMainWindow(QWidget *parent, Qt::WFlags flags)
    : QMainWindow(parent, flags)
{
    ....

    loadWindowState();

        ....
}

//--------------------------------------------------------------------------------------
void cUConvMainWindow::closeEvent(QCloseEvent * event)   // closeEvent catcher - control of unsaved data
{
    saveWindowState();

    event->accept();
    qApp->exit();
}

//--------------------------------------------------------------------------------------
void cUConvMainWindow::loadWindowState()         // Load and apply window size etc
{
    QSettings settingsFile( "config.ini", QSettings::IniFormat );
    QPoint pos = settingsFile.value("Layout/Pos", QPoint(-1, -1)).toPoint();
    QSize size = settingsFile.value("Layout/Size", QSize(320, 240)).toSize();
    bool maximized = settingsFile.value("Layout/Maximized", false).toBool();

    resize(size);

    if( pos == QPoint(-1,-1) ) {
        QRect r( 0, 0, width(), height() );        // Window rectangle
        move(QApplication::desktop()->screenGeometry().center() - r.center());
    }
    else
        move(pos);

    if( maximized )
        setWindowState(windowState() ^ Qt::WindowMaximized);

    int stateNum = settingsFile.value("Layout/StateNum", 0).toInt();
    QByteArray stateArray = settingsFile.value(QString("Layout/StateData%1").arg(stateNum)).toByteArray();
    restoreState(stateArray, stateNum);
}

//--------------------------------------------------------------------------------------
void cUConvMainWindow::saveWindowState()         // Save window size etc
{
    QSettings settingsFile( "config.ini", QSettings::IniFormat );
    settingsFile.setValue("Layout/Maximized", isMaximized());
    if( !isMaximized() ) {
        settingsFile.setValue("Layout/Pos", pos());
        settingsFile.setValue("Layout/Size", size());
    }

    int stateNum = 0;
    QByteArray stateArray = saveState(stateNum);
    settingsFile.setValue(QString("Layout/StateData%1").arg(stateNum), stateArray);
}