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How to set different fonts according to different OSes?

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  • Christian EhrlicherC Christian Ehrlicher

    Set the globally used font to the one you want via QApplication::setFont() in your main.cpp

    jronaldJ Offline
    jronaldJ Offline
    jronald
    wrote on last edited by jronald
    #3

    @Christian-Ehrlicher said in How to set different fonts according to different OSes?:

    Set the globally used font to the one you want via QApplication::setFont() in your main.cpp

    Will it set the font of every widget that has font property?

    BTW
    In doc QApplication::setFont()

    On application start-up, the default font depends on the window system.

    But in a .ui file, there is always a specific font, so how can there be a default font which depends on the window system?

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    • Christian EhrlicherC Offline
      Christian EhrlicherC Offline
      Christian Ehrlicher
      Lifetime Qt Champion
      wrote on last edited by
      #4

      If you don't see a specific font in the ui file then the font from the parent (and in the last resort this is QApplication) will be used. So don't set a font in the ui file and use QApplication::setFont() if you want a custom font instead the one provided by the OS.

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

      jronaldJ 1 Reply Last reply
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      • jronaldJ jronald

        e.g.
        For Linux, noto might be a good default choice, for Windows, Tahoma might be.
        As in a .ui file, a widget and its children could have different fonts.
        Is it necessary to change the font of every widget that has property font?

        S Offline
        S Offline
        stretchthebits
        wrote on last edited by
        #5

        @jronald Isn't that something that you should let your users choose?
        Have a font dialog box open and let the user choose what he wants.

        jronaldJ 1 Reply Last reply
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        • Christian EhrlicherC Christian Ehrlicher

          If you don't see a specific font in the ui file then the font from the parent (and in the last resort this is QApplication) will be used. So don't set a font in the ui file and use QApplication::setFont() if you want a custom font instead the one provided by the OS.

          jronaldJ Offline
          jronaldJ Offline
          jronald
          wrote on last edited by jronald
          #6

          @Christian-Ehrlicher said in How to set different fonts according to different OSes?:

          If you don't see a specific font in the ui file then the font from the parent (and in the last resort this is QApplication) will be used. So don't set a font in the ui file and use QApplication::setFont() if you want a custom font instead the one provided by the OS.

          Thank you, but with a newly created application, the font is already there, and no way to remove it.

          Christian EhrlicherC 1 Reply Last reply
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          • S stretchthebits

            @jronald Isn't that something that you should let your users choose?
            Have a font dialog box open and let the user choose what he wants.

            jronaldJ Offline
            jronaldJ Offline
            jronald
            wrote on last edited by
            #7

            @stretchthebits said in How to set different fonts according to different OSes?:

            Isn't that something that you should let your users choose?
            Have a font dialog box open and let the user choose what he wants.

            Yes, but good default settings are better, a lot of users are used to default values.

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            • jronaldJ jronald

              @Christian-Ehrlicher said in How to set different fonts according to different OSes?:

              If you don't see a specific font in the ui file then the font from the parent (and in the last resort this is QApplication) will be used. So don't set a font in the ui file and use QApplication::setFont() if you want a custom font instead the one provided by the OS.

              Thank you, but with a newly created application, the font is already there, and no way to remove it.

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

              @jronald said in How to set different fonts according to different OSes?:

              the font is already there, and no way to remove it.

              I don't understand what you want to tell us - what's the problem setting a new font with QApplication::setFont()?

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

              jronaldJ 1 Reply Last reply
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              • Christian EhrlicherC Christian Ehrlicher

                @jronald said in How to set different fonts according to different OSes?:

                the font is already there, and no way to remove it.

                I don't understand what you want to tell us - what's the problem setting a new font with QApplication::setFont()?

                jronaldJ Offline
                jronaldJ Offline
                jronald
                wrote on last edited by
                #9

                @Christian-Ehrlicher said in How to set different fonts according to different OSes?:

                If you don't see a specific font in the ui file then the font from the parent (and in the last resort this is QApplication) will be used. So don't set a font in the ui file and use QApplication::setFont() if you want a custom font instead the one provided by the OS.

                @Christian-Ehrlicher said in How to set different fonts according to different OSes?:

                I don't understand what you want to tell us - what's the problem setting a new font with QApplication::setFont()?

                I mean I'd like that there is no specific font in the ui file, but there is always one.
                QApplication::setFont() should work, it'll be better if there is no specific font in the ui file, any way?

                JonBJ Christian EhrlicherC 2 Replies Last reply
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                • jronaldJ jronald

                  @Christian-Ehrlicher said in How to set different fonts according to different OSes?:

                  If you don't see a specific font in the ui file then the font from the parent (and in the last resort this is QApplication) will be used. So don't set a font in the ui file and use QApplication::setFont() if you want a custom font instead the one provided by the OS.

                  @Christian-Ehrlicher said in How to set different fonts according to different OSes?:

                  I don't understand what you want to tell us - what's the problem setting a new font with QApplication::setFont()?

                  I mean I'd like that there is no specific font in the ui file, but there is always one.
                  QApplication::setFont() should work, it'll be better if there is no specific font in the ui file, any way?

                  JonBJ Offline
                  JonBJ Offline
                  JonB
                  wrote on last edited by
                  #10

                  @jronald said in How to set different fonts according to different OSes?:

                  it'll be better if there is no specific font in the ui file

                  I have a feeling that quite a while ago there was a thread in this forum discussing this issue. I may (well) be mistaken, but I thought it was decided it was a "bug" that Designer put any explicit font in for you if you did not choose one yourself. Is that your case? I thought that might have altered in some later version of Qt/Designer, but you would have to track down the thread....

                  Christian EhrlicherC 1 Reply Last reply
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                  • JonBJ JonB

                    @jronald said in How to set different fonts according to different OSes?:

                    it'll be better if there is no specific font in the ui file

                    I have a feeling that quite a while ago there was a thread in this forum discussing this issue. I may (well) be mistaken, but I thought it was decided it was a "bug" that Designer put any explicit font in for you if you did not choose one yourself. Is that your case? I thought that might have altered in some later version of Qt/Designer, but you would have to track down the thread....

                    Christian EhrlicherC Offline
                    Christian EhrlicherC Offline
                    Christian Ehrlicher
                    Lifetime Qt Champion
                    wrote on last edited by
                    #11

                    @JonB The bug removed something, did not set a font: https://forum.qt.io/topic/134040/

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

                    JonBJ 1 Reply Last reply
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                    • jronaldJ jronald

                      @Christian-Ehrlicher said in How to set different fonts according to different OSes?:

                      If you don't see a specific font in the ui file then the font from the parent (and in the last resort this is QApplication) will be used. So don't set a font in the ui file and use QApplication::setFont() if you want a custom font instead the one provided by the OS.

                      @Christian-Ehrlicher said in How to set different fonts according to different OSes?:

                      I don't understand what you want to tell us - what's the problem setting a new font with QApplication::setFont()?

                      I mean I'd like that there is no specific font in the ui file, but there is always one.
                      QApplication::setFont() should work, it'll be better if there is no specific font in the ui file, any way?

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

                      @jronald said in How to set different fonts according to different OSes?:

                      I mean I'd like that there is no specific font in the ui file, but there is always one.

                      No, there is not as long as you don't explicitly set one. It just shows you the current defaults as in every other setting you're seeing there and is not bold.

                      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

                        @JonB The bug removed something, did not set a font: https://forum.qt.io/topic/134040/

                        JonBJ Offline
                        JonBJ Offline
                        JonB
                        wrote on last edited by
                        #13

                        @Christian-Ehrlicher said in How to set different fonts according to different OSes?:

                        @JonB The bug removed something, did not set a font: https://forum.qt.io/topic/134040/

                        Prefect, that was the one! Seems that was indeed the other way round from this post :)

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