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  4. Error assigning values?!!

Error assigning values?!!

Scheduled Pinned Locked Moved C / C++ / MFC
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  • R raner

    oh yah, i do get the "This is the problem" message box..but what does it mean?;P

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    A Offline
    AlexO
    wrote on last edited by
    #6

    it means the GetActiveView() stopped worked in your program. Check carefully what it does (if you have source control check what it used to do)

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    • R raner

      i don't know how to see that the returned pointer is a CMy3027View*..but i've only one CView-derived class so i thought it should be?

      J Offline
      J Offline
      Joao Paulo Figueira
      wrote on last edited by
      #7

      Try to use a dynamic_cast. If the returned value is NULL, then the pointer is not of that class.

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      • A AlexO

        it means the GetActiveView() stopped worked in your program. Check carefully what it does (if you have source control check what it used to do)

        R Offline
        R Offline
        raner
        wrote on last edited by
        #8

        what is source control?...i thought it simply gets the MainFrame pointer and then the active view's pointer? anyway...i don't understand how GetActiveView() can just stop working?

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        • J Joao Paulo Figueira

          Try to use a dynamic_cast. If the returned value is NULL, then the pointer is not of that class.

          R Offline
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          raner
          wrote on last edited by
          #9

          How do i use dynamic_cast?...sorry,i've heard of it but i've never tried anything like that..

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          • R raner

            How do i use dynamic_cast?...sorry,i've heard of it but i've never tried anything like that..

            J Offline
            J Offline
            Joao Paulo Figueira
            wrote on last edited by
            #10

            Do this:

            pView = dynamic_cast<CMy3027View*>(pMF->GetActiveView());
            if(pView)
            m_numOfValues= pView->m_imageIndex;

            You might have to turn on the RTTI option in VC.

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            • J Joao Paulo Figueira

              Do this:

              pView = dynamic_cast<CMy3027View*>(pMF->GetActiveView());
              if(pView)
              m_numOfValues= pView->m_imageIndex;

              You might have to turn on the RTTI option in VC.

              R Offline
              R Offline
              raner
              wrote on last edited by
              #11

              It ran into exception handling error while executing pView = dynamic_cast(pMF->GetActiveView()); Anyway...is there a better way to obtain member variables of a CView class then?

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              • R raner

                It ran into exception handling error while executing pView = dynamic_cast(pMF->GetActiveView()); Anyway...is there a better way to obtain member variables of a CView class then?

                P Offline
                P Offline
                palbano
                wrote on last edited by
                #12

                good grief :mad: the code you posted is horribly wrong considering it was provided to you correctly

                "No matter where you go, there your are..." - Buckaoo Banzi

                -pete

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                • P palbano

                  good grief :mad: the code you posted is horribly wrong considering it was provided to you correctly

                  "No matter where you go, there your are..." - Buckaoo Banzi

                  -pete

                  R Offline
                  R Offline
                  raner
                  wrote on last edited by
                  #13

                  ;Poops...i mean i did run the right statement(that below) when i got an exception error. pView = dynamic_cast(pMF->GetActiveView());

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                  • R raner

                    ;Poops...i mean i did run the right statement(that below) when i got an exception error. pView = dynamic_cast(pMF->GetActiveView());

                    P Offline
                    P Offline
                    palbano
                    wrote on last edited by
                    #14

                    oh, u missed the "display this message as-is (no HTML)" check box. sorry :-O did you turn on the RTTI build option?

                    "No matter where you go, there your are..." - Buckaoo Banzi

                    -pete

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                    • P palbano

                      oh, u missed the "display this message as-is (no HTML)" check box. sorry :-O did you turn on the RTTI build option?

                      "No matter where you go, there your are..." - Buckaoo Banzi

                      -pete

                      R Offline
                      R Offline
                      raner
                      wrote on last edited by
                      #15

                      :-D i c i c yes i did enable it, under project->settings->c++ language...

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