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Widget jumps/flickers when hide another widget

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  • Christian EhrlicherC Offline
    Christian EhrlicherC Offline
    Christian Ehrlicher
    Lifetime Qt Champion
    wrote on last edited by
    #6

    Why do you expect that it works with an older version (except it would be a regression). Update to 5.15 and check again.

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    A 1 Reply Last reply
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    • Christian EhrlicherC Christian Ehrlicher

      Why do you expect that it works with an older version (except it would be a regression). Update to 5.15 and check again.

      A Offline
      A Offline
      Andeksan
      wrote on last edited by
      #7

      @Christian-Ehrlicher does not make sense to try because project uses Qt5.12.5.

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      • Christian EhrlicherC Offline
        Christian EhrlicherC Offline
        Christian Ehrlicher
        Lifetime Qt Champion
        wrote on last edited by
        #8

        Then you have to live with it. Neither 5.12.5 will be fixed nor looks it like a problem in your code.

        Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
        Visit the Qt Academy at https://academy.qt.io/catalog

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        • mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by
          #9

          Hi
          I tried with Qt 5.9.1 in linux and i cant get it to do it.
          alt text

          A 1 Reply Last reply
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          • mrjjM mrjj

            Hi
            I tried with Qt 5.9.1 in linux and i cant get it to do it.
            alt text

            A Offline
            A Offline
            Andeksan
            wrote on last edited by
            #10

            @mrjj, @Christian-Ehrlicher thanks for checking. i see that is not reproducible on your side.
            I did more checks: with qt 5.15.2 and 6.0.1 and on my side this bug is still presented. Also i tried on VM with KDE qt 5.12.8 only there it works normally.

            mrjjM 1 Reply Last reply
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            • A Andeksan

              @mrjj, @Christian-Ehrlicher thanks for checking. i see that is not reproducible on your side.
              I did more checks: with qt 5.15.2 and 6.0.1 and on my side this bug is still presented. Also i tried on VM with KDE qt 5.12.8 only there it works normally.

              mrjjM Offline
              mrjjM Offline
              mrjj
              Lifetime Qt Champion
              wrote on last edited by
              #11

              @Andeksan

              So even with 5.15.2 you see this on your systems?

              Also, the Latitude 7400 is not very old, is it ?

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              • mrjjM mrjj

                @Andeksan

                So even with 5.15.2 you see this on your systems?

                Also, the Latitude 7400 is not very old, is it ?

                A Offline
                A Offline
                Andeksan
                wrote on last edited by
                #12

                @mrjj yes i see this effect on 5.15.2 and 6.0.1. I would say Latitude 7400 is fresh.

                mrjjM 1 Reply Last reply
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                • A Andeksan

                  @mrjj yes i see this effect on 5.15.2 and 6.0.1. I would say Latitude 7400 is fresh.

                  mrjjM Offline
                  mrjjM Offline
                  mrjj
                  Lifetime Qt Champion
                  wrote on last edited by
                  #13

                  @Andeksan

                  Do they have anything in common gfx wise ?
                  Like both using intel driver or similar ?

                  It cant really be the app as its as basic as possible so i think it some sort
                  of gfx glitch but I also tried on old laptop that has 3d issues but
                  not even there i could get it to do it.

                  Looking at the video , it seems it has an extra redraw while the layout adjusts.

                  Im not really sure how we can work around it as not sure why we can see it in the video.

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                  • mrjjM mrjj

                    @Andeksan

                    Do they have anything in common gfx wise ?
                    Like both using intel driver or similar ?

                    It cant really be the app as its as basic as possible so i think it some sort
                    of gfx glitch but I also tried on old laptop that has 3d issues but
                    not even there i could get it to do it.

                    Looking at the video , it seems it has an extra redraw while the layout adjusts.

                    Im not really sure how we can work around it as not sure why we can see it in the video.

                    A Offline
                    A Offline
                    Andeksan
                    wrote on last edited by
                    #14

                    @mrjj yes both laptops use Intel UHD Graphics. it can be cause of this behavior. Before this post i tried to find similar discussions in the internet and there are of few of them. Seems to me this issue is kind of single cases and hardware/driver depended. I think, if i have spare time i will investigate it deeper.

                    mrjjM 1 Reply Last reply
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                    • A Andeksan

                      @mrjj yes both laptops use Intel UHD Graphics. it can be cause of this behavior. Before this post i tried to find similar discussions in the internet and there are of few of them. Seems to me this issue is kind of single cases and hardware/driver depended. I think, if i have spare time i will investigate it deeper.

                      mrjjM Offline
                      mrjjM Offline
                      mrjj
                      Lifetime Qt Champion
                      wrote on last edited by
                      #15

                      @Andeksan

                      well, it could be something like that.
                      It might not happen that often either.
                      At least, I could not get the demo code to show even trying around
                      different hardware.

                      1 Reply Last reply
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