Problem with QGraphicsWidget - resizeEvent doesn't call

Hi.
I have code like:

Code:

---

class GraphItem : public QGraphicsWidget
{
         virtual void resizeEvent(QGraphicsSceneResizeEvent* event)
        {
            //it doesn't call
         }
}
 
 
 
class Form : public QGraphicsWidget
{
 
public:
 
	Form()
	{
		GraphItem* item1 = new GraphItem;
		GraphItem* item2 = new GraphItem;
		GraphItem* item3 = new GraphItem;
 
		QGraphicsLinearLayout* layout = new QGraphicsLinearLayout;
		layout->addItem(item3);
		layout->addItem(item3);
		layout->addItem(item3);
 
		setLayout(layout);
         };
}
 
class GraphWidget : public QGraphicsView
{
  QGraphicsScene* scene = new QGraphicsScene;
  Form* form = new Form;
  scene->addItem(form);
  setScene(scene);
 }
 
void GraphWidget::resizeEvent(QResizeEvent* event)
{
	setSceneRect(0,0,geometry().width(),geometry().height());
	form->setGeometry(0,0,geometry().width(),geometry().height());
	QWidget::resizeEvent(event);
}

---

Could somebody explain why resizeEvent doesn't call and how to fix it?