#include <QMouseEvent>
...

bool AWS::eventFilter(QObject *obj, QEvent *event)
{
    if (event->type() == QEvent::MouseButtonPress) {
            QMouseEvent *mouseEvent = static_cast<QMouseEvent *>(event);
            if(mouseEvent->button() == Qt::RightButton)
                qDebug("MouseButtonPress == Qt::RightButton");
             return true;
         } 
         else {
             // standard event processing
             return QObject::eventFilter(obj, event);
         }
}