Den mån 25 feb. 2019 kl 19:54 skrev Patrick Stinson <patrickk...@gmail.com>: > > How can I animate the viewable scene rect of a QGraphicsView using screen > coordinates? This means animating both center pos and scale. This is similar > to Google Earth where the map scrolls and zooms smoothly from one point to > another. I have searched for an answer for this several times in the last > couple of years with little success. > > The use case is that I use QGraphicsView::fitInView to show the bounding rect > of all visible items. Then some items are hidden and I want to animate > zooming/scrolling to fit the new bounding rect of all the items. > > Simply setting up one animation to periodically call > QGraphicsView::centerOn() and another to call QGraphicsView::scale() doesn't > work because calling one displaces the values of the other as the > interpolation progresses. > > Thoughts? This seems like a pretty essential use case for QGraphicsView.
It was quite some time since I worked with QGV/QGS, but can't you just have your animation update a QTransform and set that on the view with setTransform? Elvis > > Thanks! > -Patrick > _______________________________________________ > Interest mailing list > Interest@qt-project.org > https://lists.qt-project.org/listinfo/interest _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
