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How to access QSqlRelationalModel from function?

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  • mrjjM mrjj

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

    refresh_devices_search_tbl

    who calls it ?
    Is it a slot for a button or how should it be called?

    P Offline
    P Offline
    Panoss
    wrote on last edited by Panoss
    #19

    It 'a a slot for two combo boxes and two textboxes.
    It 's called on textChanged and currentIndexChanged.
    (omg text and index of combos I think do get changed during form's load, e.g when they are mapped to the data mapper.)

    mrjjM 1 Reply Last reply
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    • P Panoss

      It 'a a slot for two combo boxes and two textboxes.
      It 's called on textChanged and currentIndexChanged.
      (omg text and index of combos I think do get changed during form's load, e.g when they are mapped to the data mapper.)

      mrjjM Offline
      mrjjM Offline
      mrjj
      Lifetime Qt Champion
      wrote on last edited by mrjj
      #20

      @Panoss
      well just check the
      connects and its should be clear why its not called.
      (connect return true / false)

      At some point you will also need to learn to use the debugger and set break points.
      Its THE BEST tool to find out what is happening and where program goes. :)

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      • P Offline
        P Offline
        Panoss
        wrote on last edited by Panoss
        #21

        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 1 Reply Last reply
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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
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                • 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. :)

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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
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                            • 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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