QGraphicsView::scale not working

[Dadi]

Hi,

I implemented the code below.
The initial GUI is correct but when I later call to ‘m_pView->scale’ then it is not working, the scale is not changing and nothing happens.
Any idea what I did wrong?

class AppMainWnd : public QMainWindow
{
    QGraphicsScene* m_pScene;
    QGraphicsView* m_pView;
}

AppMainWnd::AppMainWnd()
{
    // ...    
    m_pView = new QGraphicsView(this);
    m_pScene = new QGraphicsScene(this);

    m_pView->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    m_pView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

    m_pView->setScene(m_pScene);
    ui->verticalLayout->setParent(m_pView); // verticalLayout is of type QVBoxLayout*
    setCentralWidget(m_pView);

    QWidget* pMainDisplay = CreateMainDisplay();

    m_pView->setViewport(pMainDisplay);
    ui->verticalLayout->setAlignment(Qt::AlignCenter);
    ui->verticalLayout->addWidget(pMainDisplay);
    // ...    
}

void AppMainWnd::ScaleUI(double dFactor)
{
    m_pView->scale(dFactor, dFactor); // This does NOT work
}