how can make the widget not fetches native window system events

[duduqq]

I have a fullscreen transparent QWidget ,I can paint and draw in this widget.now I want the widget not fetches native window system event,and when I clicked I can open the file in the desktop which under this widget,how can I do that ,I set the QEvent::setAccept(false) ,but it do not work,and I overwrite the QApplication::x11eventfilter and QWidget::x11event(XEvent )and not work.Can you help me.