Problem with QGraphicsView/Scene coordinates

[Andrewshkovskii]

Hello all!
I have problem with changing position for QGraphicsTextItem's on QGraphicsView/Scene. I want pos them at upper left corner, here is the source of my method :

void Model::setUpGraphicScene(QStandardItemModel *model,int size)
{
    static QFont font("Times",9);
    int x = - this->vrptr->geometry().width(); //vrptr - pointer to QGraphicsView
    int y= - (this->vrptr->geometry().height()/2);
    QGraphicsItem * item;
    static QFontMetrics fn (font);
    static int yGrow = fn.height() - 3;
    this->visualResultModel->clear();//visualResultModel  is a QGraphicsScene
    item= visualResultModel->addText(model->horizontalHeaderItem(0)->text(),font);
    item->setPos(x,y);
    for(int i=1;i<size;++i)
    {
        item= visualResultModel->addText(model->horizontalHeaderItem(i)->text(),font);
        item->setPos(x,y+yGrow);
        y=item->pos().y();
    }
}

void Model::setUpGraphicScene(QStandardItemModel *model,int size)
{
    static QFont font("Times",9);
    int x = - this->vrptr->geometry().width(); //vrptr - pointer to QGraphicsView
    int y= - (this->vrptr->geometry().height()/2);
    QGraphicsItem * item;
    static QFontMetrics fn (font);
    static int yGrow = fn.height() - 3;
    this->visualResultModel->clear();//visualResultModel  is a QGraphicsScene
    item= visualResultModel->addText(model->horizontalHeaderItem(0)->text(),font);
    item->setPos(x,y);
    for(int i=1;i<size;++i)
    {
        item= visualResultModel->addText(model->horizontalHeaderItem(i)->text(),font);
        item->setPos(x,y+yGrow);
        y=item->pos().y();
    }
}

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here is result :

i.e. there is scrolling appears, why?
Thanks.
And sorry for my bad english