Guesture for widgets

[Andy314]

Hello,
I develop a app for a tablet. Until now I use only the click-event of the widgets (buttons). Now I need a more advanced user interface : Processing of Long-touch and swipe left/right events.
It is not really clear form me how to implement this. I found that I must overwrite the event function like below.

bool MyWidget::event(QEvent *event)
 {
     if (event->type() == QEvent::Gesture)
         return gestureEvent(static_cast<QGestureEvent*>(event));
     return QWidget::event(event);
 }

Does this mean that the standard widgets do not support gestures in general and I must subclass all widgets and take this new widget for my projects?