OS X: QMacNativeWidget: When this covers the entire parent view then it will not pass on unhandled mouse events to the parent view

QMacNativeWidget: When this covers the entire parent view then it will not pass on unhandled mouse events to the parent view. This means for example if a QMacNativeWidget covers a NSTextView that the underlying text view does not get focus when clicked on and thus it does not have keyboard focus.