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Run Qt widget app on linux with no GUI

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  • B Offline
    B Offline
    Bremenpl
    wrote on last edited by
    #15

    Thats exaclt what i mean- Kiosk mode. But my os is quite lightweight. I can make it lighter even, but the point is I dont know how to turn the app on in console mode in any OS for now :P.

    lprzenioslo.zut.edu.pl

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    • p3c0P Offline
      p3c0P Offline
      p3c0
      Moderators
      wrote on last edited by p3c0
      #16

      @Bremenpl

      but the point is I dont know how to turn the app on in console mode in any OS

      As said earlier boot to default tty where X is running, launch the app in fullscreen mode through startup scripts.
      Or you can try the linuxfb mode so that you own the framebuffer but then you get no window manager functionalities for eg. alt-tab switch or window decorations

      157

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      • B Offline
        B Offline
        Bremenpl
        wrote on last edited by
        #17

        So in short words, there is no way in linux to hide the whole OS GUI but still be able to run selected apps with GUI? One has to use own frame buffer?

        lprzenioslo.zut.edu.pl

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        • p3c0P Offline
          p3c0P Offline
          p3c0
          Moderators
          wrote on last edited by p3c0
          #18

          @Bremenpl

          So in short words, there is no way in linux to hide the whole OS GUI but still be able to run selected apps with GUI?

          Yes there is. The most easiest is to use the minimal OS so customizations becomes easy. Donot install anything else but a bare minimal window manager so that the user gets a feel that only your application is running on top.

          157

          B 1 Reply Last reply
          0
          • p3c0P p3c0

            @Bremenpl

            So in short words, there is no way in linux to hide the whole OS GUI but still be able to run selected apps with GUI?

            Yes there is. The most easiest is to use the minimal OS so customizations becomes easy. Donot install anything else but a bare minimal window manager so that the user gets a feel that only your application is running on top.

            B Offline
            B Offline
            Bremenpl
            wrote on last edited by
            #19

            @p3c0 So lets say I install Debian without any GUI and then I just install lightDM or OpenBox?

            lprzenioslo.zut.edu.pl

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            • p3c0P Offline
              p3c0P Offline
              p3c0
              Moderators
              wrote on last edited by
              #20

              @Bremenpl Right. Or Fluxbox.

              157

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              • B Offline
                B Offline
                Bremenpl
                wrote on last edited by
                #21

                Ill try to do this the way you described. Thank you very much.

                lprzenioslo.zut.edu.pl

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                • p3c0P Offline
                  p3c0P Offline
                  p3c0
                  Moderators
                  wrote on last edited by
                  #22

                  @Bremenpl Good Luck :)

                  157

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                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #23

                    Hi,

                    Depending on your needs, wayland and the QtWayland module might also be an option.

                    Another possible option might be KDE's kiosk mode.

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

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                    • E Offline
                      E Offline
                      Eeli K
                      wrote on last edited by
                      #24

                      If you mean that you want to boot to command line, then start the graphical Qt app but not be able to use other graphical applications and don't want a desktop environment (which you probably mean by "GUI") with desktop, panel, application launcher, etc., but still accept the X (maybe X.org) server running, then yes, it's possible. See "man startx" (ftp://www.x.org/pub/X11R7.5/doc/man/man1/startx.1.html). As you can see in the given .xinitrc example, you can write there what you want to start when X is fired up. Basically you put only your application name and the wanted command line arguments there. Then, on the command line, give the command 'startx'.

                      You have to accept that when your application opens a dialog or other window it looks ugly, can't be moved or resized etc. You can of course try to implement a minimal in-application window manager or at least take care that window sizes and placements are good enough and maybe draw a nice border around it. OR you can add a minimal window manager to .xinitrc file, as in the example.

                      B 1 Reply Last reply
                      1
                      • E Eeli K

                        If you mean that you want to boot to command line, then start the graphical Qt app but not be able to use other graphical applications and don't want a desktop environment (which you probably mean by "GUI") with desktop, panel, application launcher, etc., but still accept the X (maybe X.org) server running, then yes, it's possible. See "man startx" (ftp://www.x.org/pub/X11R7.5/doc/man/man1/startx.1.html). As you can see in the given .xinitrc example, you can write there what you want to start when X is fired up. Basically you put only your application name and the wanted command line arguments there. Then, on the command line, give the command 'startx'.

                        You have to accept that when your application opens a dialog or other window it looks ugly, can't be moved or resized etc. You can of course try to implement a minimal in-application window manager or at least take care that window sizes and placements are good enough and maybe draw a nice border around it. OR you can add a minimal window manager to .xinitrc file, as in the example.

                        B Offline
                        B Offline
                        Bremenpl
                        wrote on last edited by
                        #25

                        @Eeli-K Thank you, thats most likely what I meant :)

                        lprzenioslo.zut.edu.pl

                        mrjjM 1 Reply Last reply
                        0
                        • B Bremenpl

                          @Eeli-K Thank you, thats most likely what I meant :)

                          mrjjM Offline
                          mrjjM Offline
                          mrjj
                          Lifetime Qt Champion
                          wrote on last edited by
                          #26

                          @Bremenpl
                          Hi, other option is to create a custom session
                          so you can have single app and also be able to start a desktop if needed.

                          Most likely you will want to run a windows manager also.

                          http://askubuntu.com/questions/23932/how-do-i-replace-the-desktop-by-an-application

                          Im not sure if @Eeli-K solution is the same in debian version. :)

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