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Can't get QSettings to write my settings properly

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qsettingsc++config filefontfont family
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  • C Offline
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    Christian Ehrlicher
    Lifetime Qt Champion
    wrote on 15 Apr 2021, 17:50 last edited by Christian Ehrlicher
    #3

    @radu-m10 said in Can't get QSettings to write my settings properly:

    QSettings setting("MyTE","myte");

    QSettings setting ("Radu","MyTE");

    Maybe you should try with the same values here?

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    R 1 Reply Last reply 15 Apr 2021, 17:59
    3
    • C Christian Ehrlicher
      15 Apr 2021, 17:50

      @radu-m10 said in Can't get QSettings to write my settings properly:

      QSettings setting("MyTE","myte");

      QSettings setting ("Radu","MyTE");

      Maybe you should try with the same values here?

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      radu.m10
      wrote on 15 Apr 2021, 17:59 last edited by
      #4

      @Christian-Ehrlicher Yeah they were the same, same results. The change was because I experimented that

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      • S Offline
        S Offline
        SGaist
        Lifetime Qt Champion
        wrote on 15 Apr 2021, 18:08 last edited by
        #5

        Hi,

        @radu-m10 said in Can't get QSettings to write my settings properly:

        QFont font = setting.value("text.font",QString()).toString();
        setting.beginGroup("MainWindow");

        These two lines are not in the correct order.
        Also, your "text.font" content comes from toString so you should use the QFont::fromString method to load these data.

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        R 1 Reply Last reply 15 Apr 2021, 18:23
        0
        • M mrjj
          15 Apr 2021, 17:49

          Hi
          Its odd it doesn't have a family Qstring.

          Try to construct a font and save that

          QFont::QFont(const QString &family, int pointSize = -1, int weight = -1, bool italic = false)

          I mean instead of
          QFont font = this->font();

          Just for test.

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          radu.m10
          wrote on 15 Apr 2021, 18:10 last edited by
          #6

          @mrjj Seems like this way it works and outputs the proper values in the config but I still can't change them (maybe it should be like this since I initialize them with exact values, I don't know)

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          • S SGaist
            15 Apr 2021, 18:08

            Hi,

            @radu-m10 said in Can't get QSettings to write my settings properly:

            QFont font = setting.value("text.font",QString()).toString();
            setting.beginGroup("MainWindow");

            These two lines are not in the correct order.
            Also, your "text.font" content comes from toString so you should use the QFont::fromString method to load these data.

            R Offline
            R Offline
            radu.m10
            wrote on 15 Apr 2021, 18:23 last edited by
            #7

            @SGaist I swapped those lines.
            I am sorry I am a complete newbie but I don't really understand the fromString() part. I don't know where and what to replace. Do you mean in the loadSettings function or saveSettings function? I don't know where to call that method.

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            • S Offline
              S Offline
              SGaist
              Lifetime Qt Champion
              wrote on 15 Apr 2021, 18:25 last edited by
              #8

              Did you read the QFont toString and fromString documentation ?
              @SGaist said in Can't get QSettings to write my settings properly:

              QFont font = setting.value("text.font",QString()).toString();

              That's the line I suggest to fix.

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              R 1 Reply Last reply 15 Apr 2021, 18:38
              0
              • S SGaist
                15 Apr 2021, 18:25

                Did you read the QFont toString and fromString documentation ?
                @SGaist said in Can't get QSettings to write my settings properly:

                QFont font = setting.value("text.font",QString()).toString();

                That's the line I suggest to fix.

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                radu.m10
                wrote on 15 Apr 2021, 18:38 last edited by
                #9

                @SGaist I've read it. I understand what it should do but still I don't exactly know how to implement it. If I just change .toString with .fromString() it doesn't work. Also I don't know where the parameter "&description" should come from. Also, this might fix some things about loading the settings but still, the save function doesn't even change the output of the font size in the config file which is just an integer. It just stays at a default "9".

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                • S Offline
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                  SGaist
                  Lifetime Qt Champion
                  wrote on 15 Apr 2021, 18:42 last edited by
                  #10

                  Nowhere was it written that you should change your toString line.

                  The description is what you stored in the QSettings under "text.font".

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                  R 1 Reply Last reply 15 Apr 2021, 19:10
                  0
                  • S SGaist
                    15 Apr 2021, 18:42

                    Nowhere was it written that you should change your toString line.

                    The description is what you stored in the QSettings under "text.font".

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                    radu.m10
                    wrote on 15 Apr 2021, 19:10 last edited by
                    #11

                    @SGaist Ok, thanks. I got my head around that. Now I still have the saving issue. Did you spot any mistakes in the save function?
                    Whenever I hit the save button the settings just revert to default values. Could it be something with "this->font()" ?
                    If I initialize a font with exact parameters it seems to work. But the save function saves just defaults even if I change the font inside the editor and save afterwards.

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                    • S Offline
                      S Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on 15 Apr 2021, 19:15 last edited by
                      #12

                      @radu-m10 said in Can't get QSettings to write my settings properly:

                      QFont font = setting.value("text.font",QString()).toString();
                      setting.beginGroup("MainWindow");
                      QString fontFamily = setting.value("text.font.family",QString()).toString();
                      int fontSize = setting.value("text.font.size",12).toInt();
                      setting.setValue("text.font.size",fontSize);
                      //bool fontIsBold = setting.value("text.font.bold",false).toBool();
                      //bool fontIsItalic = setting.value("text.font.italic",false).toBool();
                      setFont(font);
                      font.setPointSize(fontSize);
                      setting.endGroup();
                      qDebug() << "Loaded";

                      You should cleanup that function, you call setFont before finishing setting the font's parameters.

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                      • N Offline
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                        nagesh
                        wrote on 16 Apr 2021, 00:48 last edited by
                        #13

                        @radu-m10 First of all make both saving and retrieving instances of QSettings same as pointed by @Christian-Ehrlicher then do the rest of the experimentation

                        QSettings setting("MyTE","myte");
                        
                        QSettings setting ("Radu","MyTE");
                        
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                        • R Offline
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                          radu.m10
                          wrote on 16 Apr 2021, 06:11 last edited by
                          #14

                          I fixed this by setting QFont font = this->font(); to ui->appName->font(); in case anyone comes across this.

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