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  4. How to access QSqlRelationalModel from function?

How to access QSqlRelationalModel from function?

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  • P Panoss

    I found the guilty!!With the debugger.
    It's a combo box which calls the function at oncurrentIndexChanged event!
    This means that when a combo gets data from a model, the oncurrentIndexChanged event is called!!
    How can I fix this?

    mrjjM Offline
    mrjjM Offline
    mrjj
    Lifetime Qt Champion
    wrote on last edited by mrjj
    #22

    @Panoss
    I think its by design.
    When it get data, the current
    index is changed so its correct to
    emit the signal.
    Check current index before and after and see.

    Most likely its 100% correct and you might need to use other signal or
    wait until after the data load to set the connect.

    ps. Good work with debugger :)

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    • P Offline
      P Offline
      Panoss
      wrote on last edited by Panoss
      #23

      Can I do something like this?

      ui.type_search_cbo->cancelEventoncurrentIndexChanged;
      ui.type_search_cbo->setModel(model);
      ui.type_search_cbo->resetEventoncurrentIndexChanged;
      

      (nice code, eh?)

      mrjjM 1 Reply Last reply
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      • P Panoss

        Can I do something like this?

        ui.type_search_cbo->cancelEventoncurrentIndexChanged;
        ui.type_search_cbo->setModel(model);
        ui.type_search_cbo->resetEventoncurrentIndexChanged;
        

        (nice code, eh?)

        mrjjM Offline
        mrjjM Offline
        mrjj
        Lifetime Qt Champion
        wrote on last edited by
        #24

        @Panoss

        well i would prefer if you could just wait to connect the slots
        so its ok it says index changed.

        There is
        http://doc.qt.io/qt-5/qobject.html#blockSignals

        but again, you are fixing a symptom so it not the best.

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        • P Offline
          P Offline
          Panoss
          wrote on last edited by
          #25

          Yes, it works with block signals.
          So, this is not the correct remedy?

          How could I wait to connect the slots?
          I don't want just to fix the symptom, I want to do it properly.

          mrjjM 1 Reply Last reply
          0
          • P Panoss

            Yes, it works with block signals.
            So, this is not the correct remedy?

            How could I wait to connect the slots?
            I don't want just to fix the symptom, I want to do it properly.

            mrjjM Offline
            mrjjM Offline
            mrjj
            Lifetime Qt Champion
            wrote on last edited by
            #26

            @Panoss
            well where do you hook up the oncurrentIndexChanged signal?

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            • P Offline
              P Offline
              Panoss
              wrote on last edited by Panoss
              #27

              It's a slot for a combo:

              void RepairDevices::on_type_search_cbo_currentIndexChanged(int index)
              {
                  refresh_devices_search_tbl(); 
              }
              
              mrjjM 1 Reply Last reply
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              • P Panoss

                It's a slot for a combo:

                void RepairDevices::on_type_search_cbo_currentIndexChanged(int index)
                {
                    refresh_devices_search_tbl(); 
                }
                
                mrjjM Offline
                mrjjM Offline
                mrjj
                Lifetime Qt Champion
                wrote on last edited by mrjj
                #28

                @Panoss said in How to access QSqlRelationalModel from function?:

                Ah you are using the auto connect feature?
                you do not have connect( xxxx) , correct ?

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                • P Offline
                  P Offline
                  Panoss
                  wrote on last edited by Panoss
                  #29

                  No, I don't even know what autoconnect is.
                  I have no connect( xxxx) for this function.
                  (unless you 're meaning that this way, it 's autoconnected)

                  mrjjM 1 Reply Last reply
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                  • P Panoss

                    No, I don't even know what autoconnect is.
                    I have no connect( xxxx) for this function.
                    (unless you 're meaning that this way, it 's autoconnected)

                    mrjjM Offline
                    mrjjM Offline
                    mrjj
                    Lifetime Qt Champion
                    wrote on last edited by
                    #30

                    @Panoss

                    well it means it will hook it up if names matches.
                    QMetaObject::connectSlotsByName(MainWindow);
                    ( in setupUI)

                    just use blockSignals then. :)

                    1 Reply Last reply
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                    • P Offline
                      P Offline
                      Panoss
                      wrote on last edited by
                      #31

                      Thank you very much mrjj, you helped me A LOT!

                      mrjjM 1 Reply Last reply
                      1
                      • P Panoss

                        Thank you very much mrjj, you helped me A LOT!

                        mrjjM Offline
                        mrjjM Offline
                        mrjj
                        Lifetime Qt Champion
                        wrote on last edited by
                        #32

                        @Panoss
                        Np.
                        Thats why i lurk around here :)

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