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    Can no longer build due to no matching function.

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    • D
      dejarked last edited by

      My Qt project has been running fine, and all the code was working. However I realised I had added an incorrect UI file as I needed one with a menu bar. I deleted the original UI file and replaced it. My code however was still somehow calling the original UI file. I cleaned the project and ran QMake on it, as well as retyping the code to call it and still had no luck. The project complied but it didn't use the right file and I had no idea where it was getting the old one from.

      I then took the user files out of the folder to see if that would force it to rebuild and rescan all the files. All that did however was give me an error. I removed the new user files and put the old ones back in and now it just throw up the error:

      • no matching function for call to 'Ui::behindlogin::setupUi(behindlogin* const)'

      and it can't compile. I need to hand the first version of my project in on Friday and I can't even get it to run anymore!

      1 Reply Last reply Reply Quote 0
      • SGaist
        SGaist Lifetime Qt Champion last edited by

        Hi and welcome to devnet,

        Did you delete the ui file + the corresponding header and source files ? Did you change any name in between ?

        Interested in AI ? www.idiap.ch
        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

        1 Reply Last reply Reply Quote 1
        • D
          dejarked last edited by

          Thanks for the reply, I deleted the UI file only. I kept the headers from the old file but when I replaced the file I kept all the names the same. I also deleted the call code for the UI file and retyped it.

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          • SGaist
            SGaist Lifetime Qt Champion last edited by

            Then, since you're in a hurry, the quick way: move these files out of the source tree, recreate your widget, copy back your custom code if you had any

            Interested in AI ? www.idiap.ch
            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

            D 1 Reply Last reply Reply Quote 1
            • D
              dejarked @SGaist last edited by dejarked

              @SGaist Is it fine to copy the GUI as well or should I remake that? As in all my labels and edits etc.

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              • SGaist
                SGaist Lifetime Qt Champion last edited by

                You can copy it, just check that all names are correct

                Interested in AI ? www.idiap.ch
                Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                D 1 Reply Last reply Reply Quote 1
                • D
                  dejarked @SGaist last edited by

                  @SGaist So, I just copied over all the code to a completely new project in a new folder and Qt is still throwing me the same error as in the original post.

                  1 Reply Last reply Reply Quote 0
                  • SGaist
                    SGaist Lifetime Qt Champion last edited by

                    Don't overwrite the new files with the content of the old one, just cherry-pick the modifications you made e.g. slot added etc.

                    Interested in AI ? www.idiap.ch
                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                    D 1 Reply Last reply Reply Quote 1
                    • D
                      dejarked @SGaist last edited by

                      @SGaist Right, I only copied the code from the old slots directly into the ones in the new project made by Qt, still getting the same error.

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                      • SGaist
                        SGaist Lifetime Qt Champion last edited by

                        So, recreating your widget from scratch in a new project and just copying the slot code gives you the same error ?

                        Interested in AI ? www.idiap.ch
                        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                        D 1 Reply Last reply Reply Quote 1
                        • D
                          dejarked @SGaist last edited by

                          @SGaist Yup, new folder, new project I created all new files in Qt added all my GUI back, followed to slot, then copied the code in and still get the same error

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                          • SGaist
                            SGaist Lifetime Qt Champion last edited by

                            Did you check that all names were matching ? Ui widget name vs C++ widget name ?

                            Interested in AI ? www.idiap.ch
                            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                            D 1 Reply Last reply Reply Quote 1
                            • D
                              dejarked @SGaist last edited by dejarked

                              @SGaist Right, sorry to be causing so many problems, but thank you for the help! Everything is working now, I missed some of the includes, however I can't use .setModal(true); on a new window opening because it's saying the class has no member called setModal

                                          behindlogin behindlogin;
                                          behindlogin.setModal(true);
                                          behindlogin.exec();
                                          connClose();
                              1 Reply Last reply Reply Quote 0
                              • SGaist
                                SGaist Lifetime Qt Champion last edited by

                                You're welcome !

                                setModal and exec are methods from QDialog. From what I understood you have a QMainWindow, no ?

                                Interested in AI ? www.idiap.ch
                                Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                D 1 Reply Last reply Reply Quote 1
                                • D
                                  dejarked @SGaist last edited by

                                  @SGaist Ahh yes, I've changed from a Dialog to a MainWindow as I wanted the menu bar at the top.

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                                  • SGaist
                                    SGaist Lifetime Qt Champion last edited by

                                    So problem solved ? :)

                                    Interested in AI ? www.idiap.ch
                                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                    D 1 Reply Last reply Reply Quote 1
                                    • D
                                      dejarked @SGaist last edited by

                                      @SGaist The code actually compiles now! Thank you, the only issue left is I've replaced the code with

                                                  behindlogin behindlogin;
                                                  behindlogin.show();
                                                  connClose();
                                      
                                      
                                      Which causes the window to open and them immediately close after
                                      1 Reply Last reply Reply Quote 0
                                      • SGaist
                                        SGaist Lifetime Qt Champion last edited by

                                        If you have something like:

                                        {
                                            behindlogin behindlogin;
                                            behindlogin.show();
                                            connClose();
                                        } <- behindlogin is destroyed here
                                        

                                        Interested in AI ? www.idiap.ch
                                        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                        D 1 Reply Last reply Reply Quote 1
                                        • D
                                          dejarked @SGaist last edited by

                                          @SGaist Right, so I've replaced it with

                                                          behindlogin *behindLogin;
                                          

                                          in the header file and then

                                                      behindLogin =new behindlogin(this);
                                                      behindLogin->show();
                                          

                                          in the main cpp file but it's saying that behindlogin does not name a type?

                                          JKSH 1 Reply Last reply Reply Quote 0
                                          • SGaist
                                            SGaist Lifetime Qt Champion last edited by

                                            Is behindlogin a member variable of a class ?

                                            Interested in AI ? www.idiap.ch
                                            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                            D 1 Reply Last reply Reply Quote 1
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