On 8 August 2018 at 15:49, Patrick Stinson <patrickk...@gmail.com> wrote: > Thanks for the reply. I am just particularly dense in this sort of cognitive > operation (something about flipping symbolic representations like in > fractional arithmetic) and might do well with just a bit of code or pseudo > code. Do you think you might provide some?
I haven't done graphics stuff in a while (unfortunately), but this should be as simple as: scene_xform = item->sceneTransform(); local_xform = next_parent->sceneTransform().inverted() * scene_xform; item.setTransform(local_xform); item.setScale(1.0); item.setRotation(0.0); item.setParentItem(next_parent); AFAIR, QGI's rotation and scale need to be reset b/c they are combined with QGI's transform() Hope this help! Chris > > Thanks! > >> On Aug 7, 2018, at 6:24 PM, Christian Gagneraud <chg...@gmail.com> wrote: >> >> On 8 August 2018 at 11:08, Patrick Stinson <patrickk...@gmail.com> wrote: >>> Hello! >>> >>> I am trying to change the parent of a QGraphicsItem without it appearing to >>> move or change size on the scene. Both the item, old parent, and new have >>> arbitrary scale values set. How can this be done? >> >> If you grab the item's sceneTransform() before re-parenting, you >> should be able to deduce it's new local transform from it's new parent >> sceneTransform(). >> >> >>> >>> Thanks! >>> _______________________________________________ >>> Interest mailing list >>> Interest@qt-project.org >>> http://lists.qt-project.org/mailman/listinfo/interest > _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
