mousePressEvent of QWidget gets called even though QTabletEvent was accepted [Qt 5.4.2]

In a QWidget derived class object with implemented tabletEvent(QTabletEvent *event) and mousePressEvent(QMouseEvent *event), the mousePressEvent gets called every time tabletEvent gets called with type QTabletEvent::TabletPress. According to the Qt documentation, this should not happen:

"The event handler QWidget::tabletEvent() receives TabletPress, TabletRelease and TabletMove events. Qt will first send a tablet event, then if it is not accepted by any widget, it will send a mouse event."

Here are the mousePressEvent() and tabletEvent() functions of the attached example project:

void TabletWidget::tabletEvent(QTabletEvent *event)

void TabletWidget::mousePressEvent(QMouseEvent *event)

The output generated if I press any button of the Wacom Intuos CTH-680S-DEIT is:

tabletEvent: 92
mousePressEvent
tabletEvent: 87
tabletEvent: 87
tabletEvent: 87
tabletEvent: 87
tabletEvent: 93

So first the tabletEvent gets called, and even though I accept the event, mousePressEvent gets called anyway. Every following tabletEvent is of type QTabletEvent::TabletMove and the last one is QTabletEvent::TabletRelease. From the Qt documentation:

QEvent::TabletMove 87
QEvent::TabletPress 92
QEvent::TabletRelease 93

I have tested this on Mac OS 10.10.3 and Windows 7 with the same result.