#include <QApplication>
#include <QtGui>
#include <QGraphicsRectItem>
#include <QGraphicsScene>
#include <QGraphicsView>
#include <QMainWindow>
#include <limits>

class MyItem : public QGraphicsRectItem
{
public:
	MyItem() :
		QGraphicsRectItem(0, 0, std::numeric_limits<int>::max(), 50) {
		setBrush(QBrush(Qt::red));
	}

	virtual void paint(QPainter *painter,
					   const QStyleOptionGraphicsItem * /* option */, QWidget * /* widget */ = 0)
	{
		painter->setBrush(brush());
		painter->drawRect(rect());
		static uint c = 0;
		qWarning() << "DRAW #" << ++c;
	}
};

class MainWindow : public QMainWindow
{
	QGraphicsScene* _scene;
	QGraphicsView* _view;
public:
	MainWindow(QWidget *parent = 0)
		: QMainWindow(parent)
	{
		_scene = new QGraphicsScene(this);
		_view = new QGraphicsView(_scene, this);
		setCentralWidget(_view);

		_scene->addLine(0, -50, 0, 250);
		_scene->addRect(0, 100, std::numeric_limits<int>::max() / 10, 50, QPen(), QBrush(Qt::yellow));

		_scene->addItem(new MyItem());
		
		_scene->setSceneRect(-1000, -50, static_cast<qreal>(std::numeric_limits<int>::max()) * 1.1, 250);

		//_view->scale(1.1, 1.0); // Overflow of viewport rect of MyItem (red rectangle)
		//_view->scale(2.0, 1.0);
		_view->scale(10., 1.0); // Overflow for yellow and red rectangle
	}
};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}