@jsulm said in Drawing QRubberBands with variabe size, but fixed aspect ratio: how to do it?:

rubberBand->setGeometry(QRect(origin, event->pos()).normalized());

Thanks. It is indeed as easy as you indicated!
Regards
Bertwim

haven't looked because I had no reason to use it, but some graphics APIs have a ValueOfPixel() function to get the attributes of an on-screen pixel. Seems of limited use though, since it is assumed that if you put down a pixel in the first place then you should know how you rendered it. FWIW, if your QPainter is rendering to a pixmap/bitmap then you should be able to get the rendered value from that backing.

Hey, not sure if you found the solution yet. But you can try this:

QGraphicsPixmapItem *pixmapItem = new QGraphicsPixmapItem; pixmapItem->setPixmap(QPixmap(":/images/pixmap.png")); _scene->addItem(pixmapItem); pixmapItem->setRotation(pixmapItem->rotation() + 45.0); QGraphicsRectItem *boundingRect = new QGraphicsRectItem(pixmapItem->sceneBoundingRect()); QPen outlinePen; outlinePen.setWidth(2); outlinePen.setColor(Qt::red); boundingRect->setPen(outlinePen); _scene->addItem(boundingRect);

I believe what you want is the sceneBoundingRect() and not the boundingRect().

Then please provide a minimal compilable example that shows the behaviour.

@onurcevik Did you ever figure the solution for this? Working on it now

That's exactly what I have been looking for! I definitely searched for the wrong terms.
Thank you for your help. Very appreciated.

@p3c0 You can upvote answer if you find it useful ;)