Hello, Yes, you are wrong.
I've just found that Qt 5.12.12 does not have this issue. So, it seems it's a bug and I've created bug report: https://bugreports.qt.io/browse/QTBUG-124574. On Thu, Apr 18, 2024 at 11:05 PM Elvis Stansvik <elvst...@gmail.com> wrote: > Den tors 18 apr. 2024 17:11Alexander Dyagilev <alervd...@gmail.com> skrev: > >> Well, I was able to reproduce the issue. >> 1. Launch app. >> 2. Change system zoom settings from 100% to 125%. >> 3. Done. The issue is here. After restarting app - issue is not >> reproduced. >> So, just a guess, on 2-monitor system this zoom settings changes at >> runtime (maybe app is started initially on some monitor and then moves to >> another one with different zoom setting). >> *Question is*: is it possible to disable this auto-zoom thing for a >> particular image or at least globally? >> > > I dont think so. You need to query the device pixel ratio of the screen > your widget is currently displayed on and re-rasterize your SVG to the > appropriate pixel dimensions. You also need to listen for events indicating > a change in device pixel ratio (i.e. user changing their system > preferences) and indicating your widget was moved to another monitor where > the ratio is different, and do the same if that happens. At least that's my > understanding. > > We do the same in our app in places where we paint in physical pixels and > i think this is par for the course for DPI-aware Qt applications. > > I could be wrong. > > Elvis > > >> On Thu, Apr 18, 2024 at 9:52 PM Alexander Dyagilev <alervd...@gmail.com> >> wrote: >> >>> Hello, >>> >>> The user with the issue has two monitors connected to his PC. *Weird >>> thing* is that SVG is loaded properly on one monitor (2K) and >>> improperly on another one (FullHD). How can this be? Only Qt authors can >>> probably shed some light on this issue :) >>> >>> >>> On Thu, Apr 18, 2024 at 11:24 AM Alexander Dyagilev <alervd...@gmail.com> >>> wrote: >>> >>>> Image as it's displayed on the user's machine: >>>> >>>> [image: image.png] >>>> >>>> >>>> On Thu, Apr 18, 2024 at 11:21 AM Alexander Dyagilev < >>>> alervd...@gmail.com> wrote: >>>> >>>>> I forgot to mention that this happens at least with Qt 6.4.3 and 6.6.2 >>>>> (or 6.6.3 I don't remember exactly). We use this code to load the image: >>>>> >>>>> import QtQuick 2.12 >>>>> >>>>> Image >>>>> { >>>>> property double zoom: 1.0 >>>>> >>>>> readonly property int preferredWidth: sameHiddenImg.implicitWidth >>>>> * zoom >>>>> readonly property int preferredHeight: >>>>> sameHiddenImg.implicitHeight * zoom >>>>> >>>>> // it works buggy under e.g. Retina displays without this >>>>> width: preferredWidth >>>>> height: preferredHeight >>>>> >>>>> // it works buggy under e.g. Retina displays without this >>>>> sourceSize: Qt.size(width, height) >>>>> >>>>> Image >>>>> { >>>>> id: sameHiddenImg >>>>> visible: false >>>>> source: parent.source >>>>> } >>>>> } >>>>> >>>>> So, valid values for preferredWidth and preferredHeight are 93 and >>>>> 456. But for some rare users they are 116 and 570 accordingly. >>>>> >>>>> On Thu, Apr 18, 2024 at 11:16 AM Alexander Dyagilev < >>>>> alervd...@gmail.com> wrote: >>>>> >>>>>> Hello, >>>>>> >>>>>> A few of our users have issues with UI rendering. We SVG sprite to >>>>>> display some elements of our UI. This SVG has a size specified in it >>>>>> (93x456). And of course we rely on it. The issue is that sometimes it's >>>>>> loaded with 116x570 size due to some unknown reason. So it's like a >>>>>> different image and we can't use such a sprite properly anymore. >>>>>> >>>>>> What can be the cause of that? I've attached this sprite image. >>>>>> >>>>> _______________________________________________ >> Interest mailing list >> Interest@qt-project.org >> https://lists.qt-project.org/listinfo/interest >> >
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