QScrollArea issue inside an embedded widget

[xtingray]

Hi,
I'm using a QScrollArea object to contain a set of widgets inside a QDialog instance. Everything works fine, but the QScrollArea doesn't show neither the horizontal or vertical scrollbars when it should. The funny part is that the viewport works fine as I test the code from a touch screen. I mean, the QScrollArea is working although I can't see the scrollbars. Why they are not visible? What I am missing?
This is my code. I appreciate any hint:

Dialog::Dialog(QWidget *parent) : QDialog(parent) 
{
    setStyleSheet("QDialog { background-color: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop:0 rgb(100, 100, 100), stop:1 rgb(30, 30, 30)); }");

    QScrollArea *workArea = new QScrollArea;
    workArea->setWidgetResizable(true);
    workArea->setSizeAdjustPolicy(QAbstractScrollArea::AdjustToContents);

    workArea->setWidget(bigPanel());

    QBoxLayout *innerLayout = new QVBoxLayout;
    innerLayout->addWidget(workArea);
    
    QWidget *innerWidget = new QWidget;
    innerWidget->setLayout(innerLayout);

    QHBoxLayout *globalLayout = new QHBoxLayout;
    globalLayout->addWidget(innerWidget);
    setLayout(globalLayout); 
}

QWidget * Dialog::bigPanel()
{
    QWidget *widget = new QWidget;
    QVBoxLayout *contentLayout = new QVBoxLayout;
   
    contentLayout->addWidget(...);
    ...
    ...
    contentLayout->addWidget(...);
    contentLayout->addWidget(...);

    widget->setLayout(contentLayout);
    return widget;
}

[jsulm]

@xtingray Did you try to set Qt::ScrollBarAlwaysOn via http://doc.qt.io/qt-5.7/qabstractscrollarea.html#horizontalScrollBarPolicy-prop and http://doc.qt.io/qt-5.7/qabstractscrollarea.html#verticalScrollBarPolicy-prop? Qt::ScrollBarAsNeeded is the default but maybe it's not set for some reason?

[xtingray]

@jsulm Looking for any kind of quick solution I tried:

1. To add manually scrollbars using setVerticalScrollBar(QScrollBar *) and setHorizontalScrollBar(QScrollBar *)
2. To set both scrrollbar policies manually using setHorizontalScrollBarPolicy(Qt::ScrollBarPolicy) and setHorizontalScrollBarPolicy(Qt::ScrollBarPolicy) and setting both as Qt::ScrollBarAlwaysOn to force them to show up

With no luck :(

Now, what is the funny thing? If I set the QScrollArea object in the external widget, the scrollbars show up and work perfectly. I mean, my problem seems to be related to the fact that I am setting the QScrollArea as part of a QWidget embedded inside another one. Is that a restriction for the QScrollArea class? What I am doing wrong?