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Can't see Items List of QComboBox, when use showFullScreen

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  • mrjjM mrjj

    @Qingshui-Kong
    Hi
    Would be possible to test with newer/newest version of Qt ?

    Also, did full screen work at some point but stopped or this is from beginning ?

    Im wondering if it could be some sort of gfx driver issue or font rendering issue.

    Q Offline
    Q Offline
    Qingshui Kong
    wrote on last edited by
    #5

    @mrjj
    Hi,

    I haven't install newer version of Qt. So I can't test it now. Could you help to test that?

    Full screen doesn't work. At least, I haven't seen that it works. So I think this is from the beginning.

    If it is some sort of gfx driver issue or font rendering issue, how could I confirm it and how could I fix it?

    Thanks!

    mrjjM 1 Reply Last reply
    0
    • Q Qingshui Kong

      @mrjj
      Hi,

      I haven't install newer version of Qt. So I can't test it now. Could you help to test that?

      Full screen doesn't work. At least, I haven't seen that it works. So I think this is from the beginning.

      If it is some sort of gfx driver issue or font rendering issue, how could I confirm it and how could I fix it?

      Thanks!

      mrjjM Offline
      mrjjM Offline
      mrjj
      Lifetime Qt Champion
      wrote on last edited by mrjj
      #6

      @Qingshui-Kong
      hi
      well i tested with
      https://www.dropbox.com/s/3hlqg2hqm22m3gu/testfullscreen.zip?dl=0
      and it works as expected.
      Could You try same sample ?

      Well you can check if any new drivers are available for your gfx card if not already done. ( like from Intel or nvidia)

      Q 1 Reply Last reply
      1
      • mrjjM mrjj

        @Qingshui-Kong
        hi
        well i tested with
        https://www.dropbox.com/s/3hlqg2hqm22m3gu/testfullscreen.zip?dl=0
        and it works as expected.
        Could You try same sample ?

        Well you can check if any new drivers are available for your gfx card if not already done. ( like from Intel or nvidia)

        Q Offline
        Q Offline
        Qingshui Kong
        wrote on last edited by
        #7

        @mrjj
        Hi,

        Thank you very much!

        This sample works.

        Maybe, my program is a little complex. I should debug my program to find out the problem.

        mrjjM 1 Reply Last reply
        0
        • Q Qingshui Kong

          @mrjj
          Hi,

          Thank you very much!

          This sample works.

          Maybe, my program is a little complex. I should debug my program to find out the problem.

          mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by
          #8

          @Qingshui-Kong
          Hi
          ok, that is good news. \o/
          Its just a normal bug then.
          Do you start app at once in full screen or
          you toggle it ? ( like sample)

          Q 1 Reply Last reply
          1
          • mrjjM mrjj

            @Qingshui-Kong
            Hi
            ok, that is good news. \o/
            Its just a normal bug then.
            Do you start app at once in full screen or
            you toggle it ? ( like sample)

            Q Offline
            Q Offline
            Qingshui Kong
            wrote on last edited by
            #9

            @mrjj
            Hi

            I start app at once in full screen. I use w.showFullscreen() in the main() function.

            mrjjM 1 Reply Last reply
            0
            • Q Qingshui Kong

              @mrjj
              Hi

              I start app at once in full screen. I use w.showFullscreen() in the main() function.

              mrjjM Offline
              mrjjM Offline
              mrjj
              Lifetime Qt Champion
              wrote on last edited by
              #10

              @Qingshui-Kong
              hi
              ok, i tried with sample that way too but still there are items.
              So it seems its something in the real app code.
              if you just do // w.showFullscreen()
              then there is items visible ?
              How do you fill the items to the combobox. any chance they can be empty strings for some reason ?

              Q 1 Reply Last reply
              0
              • mrjjM mrjj

                @Qingshui-Kong
                hi
                ok, i tried with sample that way too but still there are items.
                So it seems its something in the real app code.
                if you just do // w.showFullscreen()
                then there is items visible ?
                How do you fill the items to the combobox. any chance they can be empty strings for some reason ?

                Q Offline
                Q Offline
                Qingshui Kong
                wrote on last edited by
                #11

                @mrjj
                Hi,
                Yes, there should be some bugs in my app code.

                If I use w.show() in the main function, it works.

                I am sure that I have fill the items to the combobox. And I can select them by clicking, even though I can't see them.

                1 Reply Last reply
                0
                • AndySA Offline
                  AndySA Offline
                  AndyS
                  Moderators
                  wrote on last edited by
                  #12

                  This is a known limitation on Windows, I suggest you have a look at https://doc.qt.io/qt-5/windows-issues.html#fullscreen-opengl-based-windows as that describes the problem in more detail and gives a solution which you can use.

                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                  Q 2 Replies Last reply
                  2
                  • AndySA AndyS

                    This is a known limitation on Windows, I suggest you have a look at https://doc.qt.io/qt-5/windows-issues.html#fullscreen-opengl-based-windows as that describes the problem in more detail and gives a solution which you can use.

                    Q Offline
                    Q Offline
                    Qingshui Kong
                    wrote on last edited by
                    #13

                    @AndyS

                    Thanks very much!

                    1 Reply Last reply
                    1
                    • AndySA AndyS

                      This is a known limitation on Windows, I suggest you have a look at https://doc.qt.io/qt-5/windows-issues.html#fullscreen-opengl-based-windows as that describes the problem in more detail and gives a solution which you can use.

                      Q Offline
                      Q Offline
                      Qingshui Kong
                      wrote on last edited by
                      #14

                      @AndyS

                      Hi AndyS,

                      Could you answer my another question?
                      Here is the link.
                      https://forum.qt.io/topic/95431/how-to-set-window-flags-for-qfiledialog

                      Thanks.

                      1 Reply Last reply
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