When a widget's palette has different brushes in Active / Inactive
color groups, or it is pixmap based, multiple paint events are
triggered. This leads to unpredictable, double entries in
QWidgetRepaintManager::dirtyWidgetList().
This patch overrides event() of all test widgets and ignores
activation / deactivation events in order to make the entries of
QWidgetRepaintManager::dirtyWidgetList() predictable.
Pick-to: 6.4
Change-Id: I164d7ab4148551590ac3c50fcc3b9f98c5ac0535
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
58b1984efc