QGraphicsScene changes visible area when scenerect changes

[ThomasS0]

Hi,
when i click into the graphicsView with the following example a QGraphicsEllipseItem will be added.
My problem is that the already existing QGraphicsEllipseItems seem to "mov"e each time when a new item is added.
I want the visible are of the scene to be fixed.

When i set the scene rect to a fixed rect, the items stay in position, but then the scene rect is not correct.
I want the sceneRect to include all items and thad the visible area of the scene stays fixed when i add new items.

Can anyone help?

#include <QGraphicsScene>
#include <QGraphicsView>
#include <QApplication>
#include <QGraphicsEllipseItem>
#include <QMouseEvent>
#include <QPointF>
 
class MyView : public QGraphicsView {
public:
	void mousePressEvent(QMouseEvent *event) {
	QPointF pos = mapToScene(event->pos());
		scene()->addItem(new QGraphicsEllipseItem(pos.x()-5,pos.y()-5,10,10));
	}
};
 
int main(int argc, char **argv) {
 
	QApplication app(argc, argv);
 
	QGraphicsScene scene;
	MyView v;
	v.setScene(&scene);
	v.show();
 
	return app.exec();
 
}

#include <QGraphicsScene>
#include <QGraphicsView>
#include <QApplication>
#include <QGraphicsEllipseItem>
#include <QMouseEvent>
#include <QPointF>

class MyView : public QGraphicsView {
public:
	void mousePressEvent(QMouseEvent *event) {
	QPointF pos = mapToScene(event->pos());
		scene()->addItem(new QGraphicsEllipseItem(pos.x()-5,pos.y()-5,10,10));
	}
};

int main(int argc, char **argv) {

	QApplication app(argc, argv);

	QGraphicsScene scene;
	MyView v;
	v.setScene(&scene);
	v.show();

	return app.exec();

}

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