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[SOLVED] Saving custom user settings in Qt

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  • F Offline
    F Offline
    fs_tigre
    wrote on last edited by
    #16

    bq. error: no matching function for call to ‘MainWindow::setColor(QColor&)

    I do have that function!

    Sorry if I dont see the obvious.

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    • R Offline
      R Offline
      rishygupta
      wrote on last edited by
      #17

      is it possible QmlApplicationViewer can be used or manipulated in other class rather than main.

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      • A Offline
        A Offline
        andre
        wrote on last edited by
        #18

        [quote author="fs_tigre" date="1344421000"]bq. error: no matching function for call to ‘MainWindow::setColor(QColor&)

        I do have that function!

        Sorry if I dont see the obvious.
        [/quote]

        No, you don't have that function. From your error (my highlight):

        [quote author="fs_tigre" date="1344420694"]error: no matching function for call to 'MainWindow::setColor(QColor&)
        candidates are: void MainWindow::setColor(const QObject&)
        In member function 'void MainWindow::setColor(const QObject&)':
        [/quote]

        What makes you think QColor& is the same as a const QObject&?

        And, while we're at it: QObject cannot be copied, so you cannot use it as a function argument the way you do. Pass around pointers instead.

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        • F Offline
          F Offline
          fs_tigre
          wrote on last edited by
          #19

          Oh, I see, I do have setColor function but I'm passing a different parameter of what was specified in the header which makes it a completely different function. I was just using the code provided by Josué V. Herrera, and to be quite honest, if that's wrong I wont be able to find a solution or fix the problem. I do understand the error but I do not know the solution.

          Thanks

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          • A Offline
            A Offline
            andre
            wrote on last edited by
            #20

            Code people give you here on the forum is usually not mend to be used as-is. Often, it is "brain-to-terminal": something you quickly write down in the forum editor itself, untested and probably even not compiling. The idea of such code is that it is a teaching tool; a way of pointing you towards a solution, but often not the solution itself. Copy pasting such snippets is not learning, as it does not promote understanding. If you can only solve your issue by using completely ready-made code offered by others, then you have a serious problem that can only be solved by either really starting to study, or by shelling out some money to start paying a consultant to help you with your project.

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            • F Offline
              F Offline
              fs_tigre
              wrote on last edited by
              #21

              Understood, Thanks.

              I have said this a few times, I already took a c++ class, read a Qt book but some times is just hard to get everything understood in less than a year. I do programming as a hobby, I actually work full time as Mechanical Engineer.

              On this case I think my problem is a poor understanding of C++ in general but pass by reference and pointers are the main issue in this situation.

              I know I know, sorry for the time you guys wasted here.

              Thanks a lot for all of your previous help.

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              • F Offline
                F Offline
                fs_tigre
                wrote on last edited by
                #22

                I cannot believe it, it's working, after a few hours, I finally made this thing work.

                Made a few changes including, changing @inline void setColor(const QObject &myCurrentColor);@ to @void setColor(const QColor &myCurrentColor);@

                Even though it doesn't seem like I want to learn, I do, but sometimes it's hard, especially when you are not a programmer.

                Thanks a lot to all that helped.

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                • ? Offline
                  ? Offline
                  A Former User
                  wrote on last edited by
                  #23

                  I didn't say nothing about using inline functions in implementation files, because I was not sure why I always use it at headers. Obviously I read it in some book and now I do it without thinking.

                  I'm sorry about my mistake specifying QObject instead of QColor, as Andre said that was “brain-to-terminal”, just an example, a possible solution.

                  Glad to hear that finally you got it.

                  Note: I'm not sure if I should correct my snippet of code for future readers. I think this could break the sequence of the posts. Andre, what do you think about this?

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                  • A Offline
                    A Offline
                    astodolski
                    wrote on last edited by
                    #24

                    How would you format the color as a QColor entry in an INI type file?

                    I want to read in a value from the file to set the initial color

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                    • A Offline
                      A Offline
                      astodolski
                      wrote on last edited by
                      #25

                      How would you format the color as a QColor entry in an INI type file?

                      I want to read in a value from the file to set the initial color

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