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Bug with QTableView QSortFilterProxyModel and hidden columns

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  • B Offline
    B Offline
    Ben35
    wrote on 20 Mar 2018, 16:43 last edited by
    #1

    Hello all,

    I'm having a problem with hidden columns on a table. I have a feature that can hide some columns of my table, using the table setColumnHidden function. I also have a QSortFilterProxyModel on this table that I use for hiding some rows according to a context. So I implemented the filterAcceptsRow function in my QSortFilterProxyModel. When my context changes, I call an invalidate on my QSortFilterProxyModel to hide some rows.

    My problem is that often (this is not a reproducible bug every time), the invalidate call shows the columns that were hidden!

    I specify that I do not have any particular threading. Everything is in the main thread.

    Someone would have an idea about this bug ?!

    Thank you.

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    • V Offline
      V Offline
      VRonin
      wrote on 20 Mar 2018, 17:10 last edited by VRonin
      #2

      Strange bug.
      What's the source model? A custom one?
      The first thing I'd look at is if the source model either resets or the count of columns returns a number <= the index of the hidden column any time

      "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
      ~Napoleon Bonaparte

      On a crusade to banish setIndexWidget() from the holy land of Qt

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      • B Offline
        B Offline
        Ben35
        wrote on 20 Mar 2018, 17:29 last edited by Ben35
        #3

        Yes, it's a custom source model too. There is no reset of the model. Column counts also valid.

        Edit : I also have the impression that the display of hidden columns is only done if row1 has been hidden by the invalidate. Really strange. I have the feeling that it is a Qt bug ... :(

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        • S Offline
          S Offline
          SGaist
          Lifetime Qt Champion
          wrote on 20 Mar 2018, 21:26 last edited by
          #4

          Hi,

          Can you reproduce that with a minimal compilable example ?

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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          • C Offline
            C Offline
            Christian Ehrlicher
            Lifetime Qt Champion
            wrote on 22 Mar 2018, 16:23 last edited by Christian Ehrlicher
            #5

            When it happens with Qt5.9.4 or 5.10.0 (not sure about 5.10.1) then it's most likely QTBUG-65478

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            A 1 Reply Last reply 22 Mar 2018, 17:53
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            • C Christian Ehrlicher
              22 Mar 2018, 16:23

              When it happens with Qt5.9.4 or 5.10.0 (not sure about 5.10.1) then it's most likely QTBUG-65478

              A Offline
              A Offline
              aha_1980
              Lifetime Qt Champion
              wrote on 22 Mar 2018, 17:53 last edited by
              #6

              @Christian-Ehrlicher said in Bug with QTableView QSortFilterProxyModel and hidden columns:

              QTBUG-65478

              Most likely. For reference the complete link: https://bugreports.qt.io/browse/QTBUG-65478

              Qt has to stay free or it will die.

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