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Forum Update on Monday, May 27th 2025

Use of Unicode in Dynamic Translations related code.

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  • P Offline
    P Offline
    PoonamGupta
    wrote on 19 Oct 2018, 13:37 last edited by
    #1

    Hello,

    I have used Unicode "\xE2\x84\x83" in my code.

    example: TextWidget *test = new TextWidget("\xE2\x84\x83", this); ----> it makes QString m_text = "\xE2\x84\x83" ;
    where m_text is a member variable of TextWidget.

    this TextWidget reacts to a languageChangeEvent.
    In Language change event it returns QObject::tr(m_text);

    In this case, it returns all question mark symbol. "????"

    in my translation file (.ts) I don't have any translation for this Unicode. also Ideally if tr doesn't find any translation then it returns QString::fromUtf8(string) but in my case, it returns all "?????"

    can anybody help for how to use Unicode in a dynamic translation environment?

    Thanks in advance.

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    • V Offline
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      VRonin
      wrote on 19 Oct 2018, 14:14 last edited by
      #2

      QObject::tr(m_text);

      Does this even compile?
      The problem is not the non-asci chars, tr arguments must be the string literals to translate, not a variable.
      http://doc.qt.io/qt-5/i18n-source-translation.html#using-qt-tr-noop-and-qt-translate-noop-in-c

      "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
      ~Napoleon Bonaparte

      On a crusade to banish setIndexWidget() from the holy land of Qt

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      • P Offline
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        PoonamGupta
        wrote on 25 Oct 2018, 16:35 last edited by
        #3

        Hi,

        Yes, it compiles. I do this

        QByteArray text = m_immutableText.toLocal8Bit();
        m_text = QObject::tr(text);

        Also, I found this solution for this symbol issue :

        QTextCodec *utfCodec = QTextCodec::codecForName("UTF-8"); //creating new utf-8 codec
        QTextCodec::setCodecForLocale(utfCodec); // setting the utf-8 codec for the tr() tags

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        • V Offline
          V Offline
          VRonin
          wrote on 25 Oct 2018, 17:11 last edited by
          #4

          Please read http://doc.qt.io/qt-5/i18n-source-translation.html#using-tr-for-all-literal-text

          tr can't translate variables, it must be used only with literals

          P.S.
          m_text = QObject::tr(text); still doesn't compile, you are using m_text = QObject::tr(text.constData()); but it still can't work

          "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
          ~Napoleon Bonaparte

          On a crusade to banish setIndexWidget() from the holy land of Qt

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          19 Oct 2018, 13:37

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