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Using QAbstractModel

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  • M Offline
    M Offline
    Mihaill
    wrote on last edited by
    #11

    @KroMignon said in Using QAbstractModel:

    Qt::UserRole

    It's not help me. Whot me need still fix ?

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

      Did you also fix emitSignalUpdateModel ?

      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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      • M Offline
        M Offline
        Mihaill
        wrote on last edited by
        #13

        @SGaist said in Using QAbstractModel:

        emitSignalUpdateModel

        Whot me need doing with emitSignalUpdateModel?

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        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #14

          Fix the roles values for 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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          • M Offline
            M Offline
            Mihaill
            wrote on last edited by
            #15

            I'm not understent whot you mean. Please write code example.

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

              As I explained and @KroMignon showed you, your enum values were wrong. You hard coded the same values in that method:

              @Mihaill said in Using QAbstractModel:

              void ModelRegistration::emitSignalUpdateModel()
              {
                  auto index = this->index(0);
                  emit dataChanged(index, index, QVector<int>{0,1,2});
              }
              
              

              Change them and use your enum values.

              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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              • M Offline
                M Offline
                Mihaill
                wrote on last edited by
                #17

                It is not work, and this too not work ```
                void ModelSchedule::emitSignalUpdateModel()
                {
                for (int q = 0; q < vectorDataRegistration.count(); q ++){
                auto index = this->index(q);
                QVector <int> roles;
                for (int i = Qt::UserRole; i < Qt::UserRole + 3; i++) {
                roles.append(i);
                }
                qDebug()<<"roles"<<roles;
                emit dataChanged(index, index, roles);
                }
                }

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                • SGaistS SGaist

                  I do not see any setData reimplementation.
                  Your DeviceRoles contains wrong values. These IDs are already in use by Qt in the Roles enum.

                  GrecKoG Offline
                  GrecKoG Offline
                  GrecKo
                  Qt Champions 2018
                  wrote on last edited by
                  #18

                  @SGaist said in Using QAbstractModel:

                  I do not see any setData reimplementation.
                  Your DeviceRoles contains wrong values. These IDs are already in use by Qt in the Roles enum.

                  @KroMignon said in Using QAbstractModel:

                  @Mihaill said in Using QAbstractModel:

                  But whot me need do? Need reimplement setData ?

                  You roles must starts with Qt::UserRole (cf. https://doc.qt.io/qt-5/qtquick-modelviewsdata-cppmodels.html#qabstractitemmodel-subclass)

                  So change your enumeration to:

                      enum DeviceRoles {
                          IdRole = Qt::UserRole,
                          NameRole,
                          IsDoneRole
                      }
                  

                  This is not important when using a QML View, the views use the role names anyway and do no depend on the default Qt roles such as DisplayRole.

                  As for @Mihaill , nowhere in your code is your underlying data changed. Where/how do you change it?

                  SGaistS M 2 Replies Last reply
                  0
                  • GrecKoG GrecKo

                    @SGaist said in Using QAbstractModel:

                    I do not see any setData reimplementation.
                    Your DeviceRoles contains wrong values. These IDs are already in use by Qt in the Roles enum.

                    @KroMignon said in Using QAbstractModel:

                    @Mihaill said in Using QAbstractModel:

                    But whot me need do? Need reimplement setData ?

                    You roles must starts with Qt::UserRole (cf. https://doc.qt.io/qt-5/qtquick-modelviewsdata-cppmodels.html#qabstractitemmodel-subclass)

                    So change your enumeration to:

                        enum DeviceRoles {
                            IdRole = Qt::UserRole,
                            NameRole,
                            IsDoneRole
                        }
                    

                    This is not important when using a QML View, the views use the role names anyway and do no depend on the default Qt roles such as DisplayRole.

                    As for @Mihaill , nowhere in your code is your underlying data changed. Where/how do you change it?

                    SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #19

                    @GrecKo said in Using QAbstractModel:

                    This is not important when using a QML View, the views use the role names anyway and do no depend on the default Qt roles such as DisplayRole.

                    AFAIK, the engine will request the role names which shall be associated with integer values so that when requesting them, the model does know what to return. Thus these values are still important to properly set otherwise your model will start serving wrong information to the view.

                    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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                    • GrecKoG GrecKo

                      @SGaist said in Using QAbstractModel:

                      I do not see any setData reimplementation.
                      Your DeviceRoles contains wrong values. These IDs are already in use by Qt in the Roles enum.

                      @KroMignon said in Using QAbstractModel:

                      @Mihaill said in Using QAbstractModel:

                      But whot me need do? Need reimplement setData ?

                      You roles must starts with Qt::UserRole (cf. https://doc.qt.io/qt-5/qtquick-modelviewsdata-cppmodels.html#qabstractitemmodel-subclass)

                      So change your enumeration to:

                          enum DeviceRoles {
                              IdRole = Qt::UserRole,
                              NameRole,
                              IsDoneRole
                          }
                      

                      This is not important when using a QML View, the views use the role names anyway and do no depend on the default Qt roles such as DisplayRole.

                      As for @Mihaill , nowhere in your code is your underlying data changed. Where/how do you change it?

                      M Offline
                      M Offline
                      Mihaill
                      wrote on last edited by
                      #20

                      @GrecKo said in Using QAbstractModel:

                      As for @Mihaill , nowhere in your code is your underlying data changed. Where/how do you change it?

                      I change data in QVector<RegistrationObject> vectorDataRegistration; and after use function emitSignalUpdateModel()

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