Hi list, While attempting to port an application to Qt 6, I've hit a dead end. In the Qt 5 code we use the QStyleOptionGraphicsItem::matrix value in the paint override in order to determine the current view scaling, and then generate images using the corresponding dpi. We do this to avoid unnecessary work -- if the view is scaled out to 50%, then it's pointless generating the images at the same number of pixels as when the view is scaled to 100%.
Now, in qt 6 QStyleOptionGraphicsItem::matrix has been removed, and I am struggling to find any alternative approach to handling this situation. There's horrible hacks you can do where you could retrieve views using QGraphicsScene::views(), but that method only works if a scene is used in a single view... because otherwise you still have no way of knowing from QGraphicsItem::paint exactly WHICH view the item is currently being painted for. (I can't use the "widget" argument of QGraphicsItem::paint because a QGraphicsEffect is set for the item, so the widget argument is always a nullptr value). How can this situation be handled in Qt 6? Nyall _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
