QComboBox: preventing mouse wheel without subclassing

[Alexey Serebryakov]

Is it possible disable mouse wheel event in QComboBox without subclassing and overriding wheelEvent() method?

Thanks a lot.

[eyllanesc]

@Alexey-Serebryakov Use a eventfilter:

#include <QApplication>
#include <QComboBox>
#include <QPointer>
#include <QWidget>

class Helper: public QObject{
public:
    Helper(QWidget *widget): QObject(widget){
        m_widget = widget;
        m_widget->installEventFilter(this);
    }
    bool eventFilter(QObject *watched, QEvent *event){
        if(watched == m_widget && event->type() == QEvent::Wheel)
            return true;
        return QObject::eventFilter(watched, event);
    }
private:
    QPointer<QWidget> m_widget;
};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QComboBox w;
    w.addItems({"item1", "item2", "item3", "item4"});
    w.show();
    new Helper(&w);
    return a.exec();
}