QGraphicsScene and Extended Selection of items

[totem]

I'm stuck with the following problem :

I have a scene with several QGraphicsItems-derived instances. I make a first selection, then I want to extend it using CTRL-key and rubber band. The problem is that QGraphicsView does not seem to support extended selection due to following code :

in qgraphicsview.cpp :

void QGraphicsView::mousePressEvent(QMouseEvent *event)
{
 
// ...
 
#ifndef QT_NO_RUBBERBAND
    if (d->dragMode == QGraphicsView::RubberBandDrag && !d->rubberBanding) {
        if (d->sceneInteractionAllowed) {
            // Rubberbanding is only allowed in interactive mode.
            event->accept();
            d->rubberBanding = true;
            d->rubberBandRect = QRect();
            if (d->scene) {
                // Initiating a rubber band always clears the selection.
                d->scene->clearSelection();
            }
        }
    } else
#endif
 
// ...
}

void QGraphicsView::mousePressEvent(QMouseEvent *event)
{

// ...

#ifndef QT_NO_RUBBERBAND
    if (d->dragMode == QGraphicsView::RubberBandDrag && !d->rubberBanding) {
        if (d->sceneInteractionAllowed) {
            // Rubberbanding is only allowed in interactive mode.
            event->accept();
            d->rubberBanding = true;
            d->rubberBandRect = QRect();
            if (d->scene) {
                // Initiating a rubber band always clears the selection.
                d->scene->clearSelection();
            }
        }
    } else
#endif

// ...
}

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As you see, "Initiating a rubber band always clears the selection". So I tried to overload my scene's clearSelection() method to have my word on it, but unfortunately it's not a virtual method and thus it's not called.

I'd prefer a check at scene's level, not at item's level (indeed, i could check for QApplication::keyboardModifiers() in the itemChange() method of each item, but it's kinda intrusive)

Anybody faced the same problem ?

Thanks in advance for your answers

[aamer4yu]

but u can override mousePressEvent ,,, cant you ?

[totem]

Do you mean i should copy the contents of QGraphicsView::mousePressEvent() in my custom View ?
I'm afraid I can't access the private part of the view, the one obtained using Q_D()... And thus not able to initialize rubber band

I will try and let you know, thank you for your idea