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Qt 5.15.0 QSettings values not reloaded

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  • A Offline
    A Offline
    ad5xj
    wrote on last edited by
    #7

    Yes, the problem exists both ways. I tried that before posting.

    Ken AD5XJ

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    • A ad5xj

      My environment is :
      Linux Mint 20
      Cinnamon 4.6.6
      Kernel 5.4.0-40-generic

      Qt: 5.15.0 QtCreator 4.12.4

      OK I think you are still not getting my question? Why does the reloaded values not correspond to the saved values even if the code is changed the way you indicate.

      SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #8

      @ad5xj said in Qt 5.15.0 QSettings values not reloaded:

      OK I think you are still not getting my question?

      I do get it. However, it's usually simpler to debug code that uses objects properly just in case there's some additional stuff done in for example the destructor of said class which was never called in your case.

      The next steps:

      • ensure that the paths are indeed the same in both cases (you never know when doing string manipulation)
      • check the content of the file (you likely already did)
      • do the write and read as two explicit steps using for example two buttons to call the two methods separately.
      • check the value of "name" on write
      • check the content returned on read before applying the conversion to QString.

      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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      • A Offline
        A Offline
        ad5xj
        wrote on last edited by
        #9

        All of the mentioned items have been checked numerous times. If any of those applied the application would not load a correct value on a restart.

        Ken AD5XJ

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        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #10

          Did you also try with the Qt version provided by your distribution ?

          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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          • A Offline
            A Offline
            ad5xj
            wrote on last edited by
            #11

            That is a giant step backward (v5.7).

            Ken AD5XJ

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            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #12

              This is just to determine whether this one works correctly which your code.

              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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              • A Offline
                A Offline
                ad5xj
                wrote on last edited by
                #13

                Everything works correctly with my code EXCEPT this one thing. You mentioned earlier it could be an issue with the way QSettings caches values. Is there a way to flush and reload the values?

                Ken AD5XJ

                Pablo J. RoginaP 1 Reply Last reply
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                • A ad5xj

                  Everything works correctly with my code EXCEPT this one thing. You mentioned earlier it could be an issue with the way QSettings caches values. Is there a way to flush and reload the values?

                  Pablo J. RoginaP Offline
                  Pablo J. RoginaP Offline
                  Pablo J. Rogina
                  wrote on last edited by
                  #14

                  @ad5xj said in Qt 5.15.0 QSettings values not reloaded:

                  Is there a way to flush and reload the values?

                  Documentation is your friend...

                  Upvote the answer(s) that helped you solve the issue
                  Use "Topic Tools" button to mark your post as Solved
                  Add screenshots via postimage.org
                  Don't ask support requests via chat/PM. Please use the forum so others can benefit from the solution in the future

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                  • A Offline
                    A Offline
                    ad5xj
                    wrote on last edited by
                    #15

                    I think you will find that I do a sync() after each settings write. That is not the problem.

                    Ken AD5XJ

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                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #16

                      Did you try to check the status of your QSettings ?

                      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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                      • A Offline
                        A Offline
                        ad5xj
                        wrote on last edited by
                        #17

                        Again. EVERYTHING works as it should EXCEPT the new values do not appear until an application restart. Otherwise, the new values would not be stored and restored on restart.

                        Ken AD5XJ

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                        • U Offline
                          U Offline
                          unficyp
                          wrote on last edited by
                          #18

                          Did you ever find a solution to this ?
                          I'm on QT 5.15.2 and i have the same problem ?

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                          • Christian EhrlicherC Offline
                            Christian EhrlicherC Offline
                            Christian Ehrlicher
                            Lifetime Qt Champion
                            wrote on last edited by
                            #19

                            Please provide a minimal, compilable example to reproduce the problem. There is no report about such an issue in the bugtracker until now.

                            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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