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  4. [SOLVED] Invalid use of incomplete type 'class UI::MainWindow'
Forum Update on Monday, May 27th 2025

[SOLVED] Invalid use of incomplete type 'class UI::MainWindow'

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incomplete typemainwindowqt5.5header cpp qtinclude
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  • L Lorence
    22 Aug 2015, 18:36

    then the list must be pointer type
    yea, i edited my last reply

    it will be new ones and not the ones on screen.

    it is the ones on the screen, there will be a list of tiles on the screen and the user will choose what tiles they want to render

    *so
    std::array<Tile> should be std::array<Tile > or std::array<Tile &>
    so its the ones on screen and not new ones
    Yes you must at least use & as it must "point" to the real one.

    thanks!!!!!!!!

    all my problem is fixed :) I have not coded for weeks and C++ is already kicking me damit

    M Offline
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    mrjj
    Lifetime Qt Champion
    wrote on 22 Aug 2015, 18:38 last edited by mrjj
    #17

    @mrjj said:
    ok. Super :)

    and tile_list is the ones to choose from ?

    Dont worry. I programmed c++ for 20 years and it still kicks me ;)

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    • L Offline
      L Offline
      Lorence
      wrote on 22 Aug 2015, 18:43 last edited by
      #18

      and tile_list is the ones to choose from ?

      yes, it is a list of Tile which is inheriting QLabel

      Dont worry. I programmed c++ for 20 years and it still kicks me ;)

      woaaaaa, me is about a year, and started this QT last week, i choose this for my tile engine's interface from SFML, i still have more ways to go !^_^

      M 1 Reply Last reply 22 Aug 2015, 18:47
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      • L Lorence
        22 Aug 2015, 18:43

        and tile_list is the ones to choose from ?

        yes, it is a list of Tile which is inheriting QLabel

        Dont worry. I programmed c++ for 20 years and it still kicks me ;)

        woaaaaa, me is about a year, and started this QT last week, i choose this for my tile engine's interface from SFML, i still have more ways to go !^_^

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        mrjj
        Lifetime Qt Champion
        wrote on 22 Aug 2015, 18:47 last edited by
        #19

        @Lorence said:
        welcome on board to Qt. its a nice frame work.

        Oh so its some sort of game editor your are making ?

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        • L Offline
          L Offline
          Lorence
          wrote on 22 Aug 2015, 18:52 last edited by
          #20

          welcome on board to Qt. its a nice frame work.

          Yes my first choice is wxwidget and windows form application, but signals and slots mechanism of qt makes me decide to choose qt

          Oh so its some sort of game editor your are making ?
          yes exatcly, like the rpg maker vx ace of steam

          M 1 Reply Last reply 22 Aug 2015, 18:56
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          • L Lorence
            22 Aug 2015, 18:52

            welcome on board to Qt. its a nice frame work.

            Yes my first choice is wxwidget and windows form application, but signals and slots mechanism of qt makes me decide to choose qt

            Oh so its some sort of game editor your are making ?
            yes exatcly, like the rpg maker vx ace of steam

            M Offline
            M Offline
            mrjj
            Lifetime Qt Champion
            wrote on 22 Aug 2015, 18:56 last edited by
            #21

            @Lorence
            Well IMHO Qt is more feature rich than wxwidget even I did like that also.

            Oh. Wow. thats a huge project. !
            So its an editor and and tile engine for making tile games. Pretty cool.

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            • L Offline
              L Offline
              Lorence
              wrote on 22 Aug 2015, 19:08 last edited by
              #22

              Well IMHO Qt is more feature rich than wxwidget even I did like that also.
              yea, in other forum's debation, QT always win, whats IMHO?

              Oh. Wow. thats a huge project. !
              yes this is a huge project for me XD,
              and i still got no idea about integrating script language into this project

              M 1 Reply Last reply 22 Aug 2015, 19:12
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              • L Lorence
                22 Aug 2015, 19:08

                Well IMHO Qt is more feature rich than wxwidget even I did like that also.
                yea, in other forum's debation, QT always win, whats IMHO?

                Oh. Wow. thats a huge project. !
                yes this is a huge project for me XD,
                and i still got no idea about integrating script language into this project

                M Offline
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                mrjj
                Lifetime Qt Champion
                wrote on 22 Aug 2015, 19:12 last edited by
                #23

                @Lorence
                IMHO = In my humble opinion
                Well I tested both and choose Qt.

                Would also be huge for me to make as single person if we are talking full
                game editor and engine :)

                I would have a good look at http://doc.qt.io/qt-5/qtscript-index.html
                Should be fast enough and quite easy to mix c++ and script.

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                • L Offline
                  L Offline
                  Lorence
                  wrote on 22 Aug 2015, 19:16 last edited by
                  #24

                  I see

                  Im planning to finish this as in 100%

                  I would have a good look at http://doc.qt.io/qt-5/qtscript-index.html
                  Should be fast enough and quite easy to mix c++ and script.

                  thanks!

                  We have group on skype do you want to join?

                  M 1 Reply Last reply 22 Aug 2015, 19:24
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                  • L Lorence
                    22 Aug 2015, 19:16

                    I see

                    Im planning to finish this as in 100%

                    I would have a good look at http://doc.qt.io/qt-5/qtscript-index.html
                    Should be fast enough and quite easy to mix c++ and script.

                    thanks!

                    We have group on skype do you want to join?

                    M Offline
                    M Offline
                    mrjj
                    Lifetime Qt Champion
                    wrote on 22 Aug 2015, 19:24 last edited by mrjj
                    #25

                    @Lorence
                    ok. to make it a full product? To sell or make games and sell ?

                    -- We have group on skype do you want to join?
                    Oh thanks for the offer but I only use skype at work as I sit in the living room and
                    taking in mics drives the others crazy :)
                    So no Team Speak for me either :)

                    So you are a group of people making this?

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                    • L Offline
                      L Offline
                      Lorence
                      wrote on 22 Aug 2015, 19:29 last edited by
                      #26

                      ok. to make it a full project ? To sell or make games and sell ?
                      I want to sell the whole project. i dont want wasting time doing things that is unrelated to programming so i dont want to make games and sell.

                      okay i see np.

                      So you are a group of people making this?
                      No im the only one making this. the skype group is a group of programmers experts and newbies. just for teaching things

                      M 1 Reply Last reply 22 Aug 2015, 19:44
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                      • L Lorence
                        22 Aug 2015, 19:29

                        ok. to make it a full project ? To sell or make games and sell ?
                        I want to sell the whole project. i dont want wasting time doing things that is unrelated to programming so i dont want to make games and sell.

                        okay i see np.

                        So you are a group of people making this?
                        No im the only one making this. the skype group is a group of programmers experts and newbies. just for teaching things

                        M Offline
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                        mrjj
                        Lifetime Qt Champion
                        wrote on 22 Aug 2015, 19:44 last edited by
                        #27

                        @Lorence
                        Ok, a game maker product.
                        You should also consider how to handle support.
                        Takes more time than one realizes.

                        Ah, that way. Did not know skype has such forums/groups.

                        Really good luck with it.

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                        • L Offline
                          L Offline
                          Lorence
                          wrote on 22 Aug 2015, 19:49 last edited by
                          #28

                          yea thanks.

                          Ah, that way. Did not know skype has such forums/groups.
                          oh no, im really bad at explaining things. i mean
                          you can create a conversation group in skype and invite people as many as you can. so i just found this group and then i joined

                          okay thanks again :)

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                          • S Offline
                            S Offline
                            SherifOmran
                            wrote on 9 Feb 2018, 17:17 last edited by
                            #29

                            my friends,i had a similar case and found this happens when you mix different versions of Qt to compile the project
                            they simply change the ui_*.h files or sometimes they empty it and thus this happens. Occured at least with me ..

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                            • M mrjj
                              22 Aug 2015, 17:15

                              @Lorence said:

                              grassyTile

                              What type is that ?

                              "use of incomplete type" often means a include file is missing
                              or you forwarded a class
                              like
                              class SomeClass;

                              And try to use it in a context where it needs to be fully defined.
                              Like adding to some template lists.

                              Not sure what you tried to define here ?

                              std::array<Tile,1> tile_list <---- ; missing here?
                              {
                              ui->grassyTile // heres where error coming from
                              };

                              P Offline
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                              Purvi
                              wrote on 21 Aug 2020, 12:53 last edited by
                              #30

                              @mrjj Thanks, you are right for saying that some header files might be missing.

                              1 Reply Last reply
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