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Signal isn't recognized after connecting it to a slot

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  • SGaistS SGaist

    Hi,

    Where/when is CalculateTimeStep called ?

    J Online
    J Online
    Jay_emissary
    wrote last edited by
    #3

    @SGaist CalculateTimeStep is being called in a header file. I figured that I wouldn't need the .cpp file since I'm only using three mini-functions throughout the entire class. Additionally, I could have classes inherit these functions later.

    CalculateTimeStep is called from a timer that's inside StartTimeStepTimer();

        void StartTimeStepTimer(){
            QTimer* updateTimer = new QTimer(this);
            QObject::connect(updateTimer, &QTimer::timeout, this, &TimeStep::CalculateTimeStep);
            updateTimer->start(FPSms); 
        }
    
    
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    • Christian EhrlicherC Offline
      Christian EhrlicherC Offline
      Christian Ehrlicher
      Lifetime Qt Champion
      wrote last edited by
      #4

      And where is StartTimeStepTimer() called?
      Please provide a minimal, compilable example to reproduce your problem.

      Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
      Visit the Qt Academy at https://academy.qt.io/catalog

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      • J Online
        J Online
        Jay_emissary
        wrote last edited by
        #5

        I'm sorry, but now that you've mentioned it and after taking another look at my code, I think the problem lies within the fact that I forgot to call StartTimeStepTimer in the initializer class, my bad. I would test to verify that, but unfortunately, I've come across another issue, and I can't compile without fixing it first. I haven't done anything to my project to cause an error like this, so I'm not sure what I can do to fix it... I've already tried reinstalling Qt Creator, but I can't seem to shake the error. Are you familiar with anything like this?

        image.png

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        • J Online
          J Online
          Jay_emissary
          wrote last edited by Jay_emissary
          #6

          As far as I know, the error from the image stems from the QGuiApplication file, which I've never touched. This one error is causing a domino effect, leading to about a hundred other ambiguous errors. Strangely, it's specific to this project, despite the fact that I haven't added anything to warrant an error like this. I've also tried cleaning and rebuilding the project from the IDE, but that also doesn't help. If I could get some help with this, I'd be ever so grateful.

          gameinitializer.h:3:10: In included file: no member named 'clock_t' in the global namespace; did you mean 'clockid_t'?
          ctime:60:11: error occurred here
          pthread.h:382:13: 'clockid_t' declared he

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          • J Online
            J Online
            Jay_emissary
            wrote last edited by
            #7

            I've just realized that the image I sent can be a little misleading, so I have a couple of other images, proving that the error doesn't just come from the game initializer class; no matter where I go in the project. The error always shows up somewhere at the top.

            image.png
            image.png

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            • Christian EhrlicherC Offline
              Christian EhrlicherC Offline
              Christian Ehrlicher
              Lifetime Qt Champion
              wrote last edited by
              #8

              Show the relevant header, maybe you added a using namespace or forgot the ; at the end of the class.

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              • Christian EhrlicherC Christian Ehrlicher

                Show the relevant header, maybe you added a using namespace or forgot the ; at the end of the class.

                J Online
                J Online
                Jay_emissary
                wrote last edited by Jay_emissary
                #9

                @Christian-Ehrlicher That's my problem. Because the error points to many different header files, it's hard to tell which one is truly relevant. Excuse me for using images, but there's too much code here, and because I'm a new user, Qt flags my posts as spam if there are too many characters.

                All the errors point to this file, which I never touch (it's engine related)
                e9a20f36-f82e-4adc-8c64-1dbf6d5071d9-image.png !

                the error that always appears at the top points to the engine-related header files in my project...
                d01a0973-4d90-4fb5-b459-285926244f51-image.png

                d006426d-cea6-4930-9ffb-71a5759cdab3-image.png

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                • Christian EhrlicherC Offline
                  Christian EhrlicherC Offline
                  Christian Ehrlicher
                  Lifetime Qt Champion
                  wrote last edited by
                  #10

                  Start over with a simple main.cpp

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                  Visit the Qt Academy at https://academy.qt.io/catalog

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                  • J Jay_emissary has marked this topic as solved
                  • Christian EhrlicherC Christian Ehrlicher

                    Start over with a simple main.cpp

                    J Online
                    J Online
                    Jay_emissary
                    wrote last edited by
                    #11

                    @Christian-Ehrlicher
                    Hey, so after a bit of research yesterday, I found that when you have a file names time.cpp/time.h in your project, Qt gets confused and throws this exact error. The files didn't show up in my Qt project manager, so I didn't realize that they were for some reason in my project, but as I was moving my files to a clean project like you suggested, I found that both time.cpp and time.h were sitting in my project files! I removed them and it worked perfectly. Thank you so much for the recommendation!

                    here's the stack overflow page I was reading yesterday
                    https://stackoverflow.com/questions/43813563/clock-t-and-clock-in-does-not-declared-in-this-scope-in-qt

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                    • Christian EhrlicherC Offline
                      Christian EhrlicherC Offline
                      Christian Ehrlicher
                      Lifetime Qt Champion
                      wrote last edited by
                      #12

                      This has nothing to do with Qt - you must not use a filename which is also used by the c or c++ system headers which you did.

                      Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
                      Visit the Qt Academy at https://academy.qt.io/catalog

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                      • Christian EhrlicherC Christian Ehrlicher

                        This has nothing to do with Qt - you must not use a filename which is also used by the c or c++ system headers which you did.

                        J Online
                        J Online
                        Jay_emissary
                        wrote last edited by
                        #13

                        @Christian-Ehrlicher Noted.

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