Position of Items in QGraphicsScene/QGraphicsView

[StefanK2]

Hello,

I have a problem with the position of Items in QGraphicsScenes.

I wrote this simple program for testing, I made the ui with the designer:

int main(int argc, char *argv[])
{
	QApplication app(argc, argv);
 
	Form form;
 
	QGraphicsScene scene;
 
	scene.setSceneRect(0, 0, form.graphicsView->width(), form.graphicsView->height());
 
	scene.addRect(0, 0, 10, 10, QPen(), QBrush(QColor(Qt::black)));
 
	form.graphicsView->setScene(&scene);
	form.graphicsView->fitInView(scene.sceneRect());
 
	form.show();
 
	return app.exec();
}

int main(int argc, char *argv[])
{
	QApplication app(argc, argv);

	Form form;

	QGraphicsScene scene;

	scene.setSceneRect(0, 0, form.graphicsView->width(), form.graphicsView->height());

	scene.addRect(0, 0, 10, 10, QPen(), QBrush(QColor(Qt::black)));

	form.graphicsView->setScene(&scene);
	form.graphicsView->fitInView(scene.sceneRect());

	form.show();

	return app.exec();
}

To copy to clipboard, switch view to plain text mode 

When I run this program the RectItem somewhere in the view, not at the position (0,0).

Where is the error in this code, I thought fitInView() manipulates the view in a way that the sceneRect is scaled to the right size.