How to use the QGraphicsView's translate() function?

Question

here i have a scene and a associated view ,then i hava a position in the scene coordinates.I want to set the center of the viewport with the position.How can i do it? I try

Answer 1

I used the following workaround:

QTransform old_transform = transform();

QRectF scene_rect = scene()->sceneRect();
QRectF new_scene_rect(scene_rect.x()-translation.x(),
                      scene_rect.y()-translation.y(),
                      scene_rect.width(),scene_rect.height());
scene()->setSceneRect(new_scene_rect);

setTransform(old_transform);

The transform part was necessary since otherwise it resets scaling.

This solution is essentially forcing it to change where it is allowed look at, which it is far from elegant.

I hope that somebody else comes up with a clean answer that allows to actually use the translate method as intended.

Note that I use Qt 4.85, might be different with newer versions.