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QListWidget row size with a custom QListWidgetItem

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  • canellasC canellas

    @kshegunov

    The Item class
    alt text

    The screen on my cel, with sizePolicy set to Fixed in both dimensions:
    alt text

    And with setSizeHint(QSize(0, 150));

    kshegunovK Offline
    kshegunovK Offline
    kshegunov
    Moderators
    wrote on last edited by
    #8

    Okay, wait a bit. So you have a compound widget, does that widget have a layout? If it does you shouldn't need to do anything (even set the hint).

    Read and abide by the Qt Code of Conduct

    canellasC 1 Reply Last reply
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    • kshegunovK kshegunov

      Okay, wait a bit. So you have a compound widget, does that widget have a layout? If it does you shouldn't need to do anything (even set the hint).

      canellasC Offline
      canellasC Offline
      canellas
      wrote on last edited by canellas
      #9

      @kshegunov Yes, The first TextLabel and the text box by its side are grouped in a horizontal layout, as the Text Label and the text box below, and the whole Item class, sub class of QWidget, has a vertical layout.

      I wonder if the QListWidgetItem, or the list object should, somehow, have a layout defined.

      kshegunovK 1 Reply Last reply
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      • canellasC canellas

        @kshegunov Yes, The first TextLabel and the text box by its side are grouped in a horizontal layout, as the Text Label and the text box below, and the whole Item class, sub class of QWidget, has a vertical layout.

        I wonder if the QListWidgetItem, or the list object should, somehow, have a layout defined.

        kshegunovK Offline
        kshegunovK Offline
        kshegunov
        Moderators
        wrote on last edited by kshegunov
        #10

        Hm that's odd. If you have a vertical layout for the widget, I'd set the policy to expanding both directions. Aside from that it might be some peculiarity of the view ... but I haven't encountered it by now.

        I wonder if the QListWidgetItem, or the list object should, somehow, have a layout defined.

        It has a special way of laying out the items (implemented for the view itself).

        Read and abide by the Qt Code of Conduct

        canellasC 1 Reply Last reply
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        • kshegunovK kshegunov

          Hm that's odd. If you have a vertical layout for the widget, I'd set the policy to expanding both directions. Aside from that it might be some peculiarity of the view ... but I haven't encountered it by now.

          I wonder if the QListWidgetItem, or the list object should, somehow, have a layout defined.

          It has a special way of laying out the items (implemented for the view itself).

          canellasC Offline
          canellasC Offline
          canellas
          wrote on last edited by
          #11

          @kshegunov I set the sizePolicy to Expanding in horizontal and vertical dimensions, but the result was the same. I tried to remove the setSizeHint(QSize(0, 150));,and also the setSizeAdjustPolicy(QListWidget::AdjustToContents);, but with the same result.

          kshegunovK 1 Reply Last reply
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          • canellasC canellas

            @kshegunov I set the sizePolicy to Expanding in horizontal and vertical dimensions, but the result was the same. I tried to remove the setSizeHint(QSize(0, 150));,and also the setSizeAdjustPolicy(QListWidget::AdjustToContents);, but with the same result.

            kshegunovK Offline
            kshegunovK Offline
            kshegunov
            Moderators
            wrote on last edited by
            #12

            It's possible it may be a bug too. Can you prepare a minimal example that reproduces the behaviour? Btw, do you experience this only on the mobile device, when the screen is small?

            Read and abide by the Qt Code of Conduct

            canellasC 1 Reply Last reply
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            • kshegunovK kshegunov

              It's possible it may be a bug too. Can you prepare a minimal example that reproduces the behaviour? Btw, do you experience this only on the mobile device, when the screen is small?

              canellasC Offline
              canellasC Offline
              canellas
              wrote on last edited by
              #13

              @kshegunov Only in the mobile. When I run on a 14" notebook display, it works as expected, i.e., the row height and width expand and reduce according to the size of the window.

              I have the example ready. Where should I send it to?

              In time, thanks a lot for your time!

              kshegunovK 1 Reply Last reply
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              • canellasC canellas

                @kshegunov Only in the mobile. When I run on a 14" notebook display, it works as expected, i.e., the row height and width expand and reduce according to the size of the window.

                I have the example ready. Where should I send it to?

                In time, thanks a lot for your time!

                kshegunovK Offline
                kshegunovK Offline
                kshegunov
                Moderators
                wrote on last edited by
                #14

                Upload it where it's convenient. I'd try on my machine but I don't have any device on hand, so it might be a very limited test. For now my advice is to wait a bit so our other users can see and possibly offer insight, but you may need to post it (the example and description) as a bugreport. Don't hold your breath of it being fixed though, the widgets module isn't priority ...

                Read and abide by the Qt Code of Conduct

                canellasC 1 Reply Last reply
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                • kshegunovK kshegunov

                  Upload it where it's convenient. I'd try on my machine but I don't have any device on hand, so it might be a very limited test. For now my advice is to wait a bit so our other users can see and possibly offer insight, but you may need to post it (the example and description) as a bugreport. Don't hold your breath of it being fixed though, the widgets module isn't priority ...

                  canellasC Offline
                  canellasC Offline
                  canellas
                  wrote on last edited by
                  #15

                  @kshegunov I uploaded the project to https://www.dropbox.com/s/tx88huu23d5cfcm/untitled6.tar.gz?dl=0. It is a tar.gz file, if you do not mind.

                  Well, if it is a bug, that means big trouble to me, as I am using something similar in a customer application.

                  Again, thanks for your help and time!

                  kshegunovK 1 Reply Last reply
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                  • canellasC canellas

                    @kshegunov I uploaded the project to https://www.dropbox.com/s/tx88huu23d5cfcm/untitled6.tar.gz?dl=0. It is a tar.gz file, if you do not mind.

                    Well, if it is a bug, that means big trouble to me, as I am using something similar in a customer application.

                    Again, thanks for your help and time!

                    kshegunovK Offline
                    kshegunovK Offline
                    kshegunov
                    Moderators
                    wrote on last edited by kshegunov
                    #16

                    I took a peek at your code and I have artifacts when resizing the widget. But it's my bad. You can't do this the way you're trying to. Here:

                    This function should only be used to display static content in the place of a list widget item. If you want to display custom dynamic content or implement a custom editor widget, use QListView and subclass QItemDelegate instead.

                    So what you need to do is to rework your code to use a list view with a delegate.

                    Read and abide by the Qt Code of Conduct

                    canellasC 1 Reply Last reply
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                    • kshegunovK kshegunov

                      I took a peek at your code and I have artifacts when resizing the widget. But it's my bad. You can't do this the way you're trying to. Here:

                      This function should only be used to display static content in the place of a list widget item. If you want to display custom dynamic content or implement a custom editor widget, use QListView and subclass QItemDelegate instead.

                      So what you need to do is to rework your code to use a list view with a delegate.

                      canellasC Offline
                      canellasC Offline
                      canellas
                      wrote on last edited by
                      #17

                      @kshegunov I understand... well, I'll try, once more, to understand views, models and delegates, and how Qt implement them. 8)

                      The examples that come with QtCreator do not, as far as I could see, show how to insert in a Q*View a custom class object, and searching the web, I could not find an example either.

                      Do you know any link that shows how to implement it? I would not mind to take a few days to do it from scratch on my own, but I do not have a lot of time to fix the app.

                      Anyway, thanks a lot!!!

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