"Smooth" Scrolling, QGraphicsView

[nearlyNERD]

Hey,

I've a problem:

Every time, my "main"-item hits another, my QGraphicsView should "scroll" to / center on my main-item: (y-coord)

if(!scene()->collidingItems(this).isEmpty())
    {
                   emit newKollision(positiony);
    }

if(!scene()->collidingItems(this).isEmpty())
    {
                   emit newKollision(positiony);
    }

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VerticalScrollBar = this->verticalScrollBar();
QObject::connect(mouse, SIGNAL(newKollision(int)), this, SLOT(ScrollBarSetValue(int)));

VerticalScrollBar = this->verticalScrollBar();
QObject::connect(mouse, SIGNAL(newKollision(int)), this, SLOT(ScrollBarSetValue(int)));

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void GraphWidget::ScrollBarSetValue(int value)
{
    VerticalScrollBar->setValue(value-400);
}

void GraphWidget::ScrollBarSetValue(int value)
{
    VerticalScrollBar->setValue(value-400);
}

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VerticalScrollBar->scroll(...., ...) doesn't work -> there appears a gray background, when I call this function.

This works well, but there is no smooth scrolling to the y-position of the item, of course...

So, has anybody an idea, how to implement smooth scrolling on a QGraphicsView, if I want to set my y-value in the application (no MouseEvent)

Thanks