How to disable wheelEvent()

[Markus]

Dear All,

I want do disable the wheelEvent for QComboBox, QDoubleSpinBox, and QSpinBox. (They live inside a QWidget which itself lies in a QFrame).

I tried setFocusPolicy(Qt::ClickFocus or even Qt::NoFocus) but it does not make a difference. As soon as I am with the mouse over those objects the wheelEvent will manipulate them.

Any idea how to stop the wheelEvent without subclassing all the classes?

Thanks
Markus

[Lykurg]

Subclassing Or simply install an event filter on that widgets.

[JacquesBaniaque]

Like it was said install an event filter and handle (or simply not handle) Wheel events by yourself

void SomeClass::initializeStuff()
{
    m_combo = new QComboBox(this);
    m_combo->installEventFilter(this);
}
 
bool SomeClass::eventFilter(QObject *obj, QEvent *event)
{
    if(event->type() == QEvent::Wheel && obj == m_combo)
    {
        qDebug() << "Wheel event blocked";
        return true;
    }
    return false;
}

void SomeClass::initializeStuff()
{
    m_combo = new QComboBox(this);
    m_combo->installEventFilter(this);
}

bool SomeClass::eventFilter(QObject *obj, QEvent *event)
{
    if(event->type() == QEvent::Wheel && obj == m_combo)
    {
        qDebug() << "Wheel event blocked";
        return true;
    }
    return false;
}

To copy to clipboard, switch view to plain text mode 

[Markus]

Danke!

the event filter works great