add a QGraphicsScene::focusItemChanged() signal

I've placed some widgets in a QGraphicsView that allow for editing (e.g. QLineEdit, QTextEdit, or in my case some rich text editors based off QWebView). I also have a top level Edit menu with standard actions like Copy, Delete, Select All, etc. I'd like to be able to enable/disable these menu actions when the focus changes. Unfortuantely qApp->focusWidget returns a pointer to the QGraphicsView, not the widgets in the graphics scene, when the user clicks on one of these widgets. This isn't a problem since i can drill through the QGraphicsView to get at the embedded widget like so:

QWidget* res = qApp->focusWidget();
QGraphicsView* graphicsView = qobject_cast<QGraphicsView *>(res);
QGraphicsScene* scene = graphicsView->scene();
QGraphicsItem* focusItem = scene->focusItem();
QGraphicsWidget* focusWidget = focusItem->topLevelWidget();
QGraphicsProxyWidget* proxyWidget = qobject_cast<QGraphicsProxyWidget *>(focusWidget);
QWidget* widget = proxyWidget->widget();

here's the problem, I can only detect a focus even change occuring when the user clicks on the graphics view, not when an particular item in the view actually gets focus (by which I can detect using the above code). That said, this could be made slight better if a signal was added to QGraphicsScene:

void QGraphicsScene::focusItemChanged() signal;

A better solution would be for QApplication to notify me that a focus change has taken place when the user clicks on various editable widgets within the graphics view itself, thus making it unnecessary to manually connect to yet another signal on the fly when a graphics view gets focus.

...or is there a way to already do all this?