When mixing QML and C++, it's possible to clear focus in QGraphicsScene by calling QGraphicsScene::setFocusItem(0). When doing so, QDeclarativeItem::hasActiveFocus() will return true if the declarative item or one of its descendents has (ever) had focus. This is because the function checks if the item has a focusItem(), but not if it actually has focus. QGraphicsItem::hasFocus() works and returns the correct value.

See also https://bugreports.qt.nokia.com/browse/QTCOMPONENTS-1183