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QTextStream codec

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  • Christian EhrlicherC Christian Ehrlicher

    @naax said in QTextStream codec:

    QString line = in.readLine().toUtf8;

    This is wrong. You convert a QString to utf8 and then back into a QString by using the system locale.
    Make sure your input file is correctly encoded - I'm pretty sure it's not utf-8 encoded.

    naaxN Offline
    naaxN Offline
    naax
    wrote on last edited by
    #5

    @Christian-Ehrlicher

    I have everywhere UTF8 or I just don't know where I can change this that

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    • Christian EhrlicherC Offline
      Christian EhrlicherC Offline
      Christian Ehrlicher
      Lifetime Qt Champion
      wrote on last edited by
      #6

      @naax said in QTextStream codec:

      or I just don't know where I can change this that

      Since you don't show us the code where you create your text file we can't be sure that it's encoding is really utf-8...

      Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
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      naaxN 1 Reply Last reply
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      • Christian EhrlicherC Christian Ehrlicher

        @naax said in QTextStream codec:

        or I just don't know where I can change this that

        Since you don't show us the code where you create your text file we can't be sure that it's encoding is really utf-8...

        naaxN Offline
        naaxN Offline
        naax
        wrote on last edited by
        #7

        @Christian-Ehrlicher

        Also, I have this .txt file created myself in Windows. I'm adding here items manually for first, and I'm working in my program to add/load/save function for the future.
        imgw.png

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

          QString::toDouble() takes a bool which shows you if it could be correctly converted. Also you should print out the strings before trying to convert them to numbers.

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

          naaxN 1 Reply Last reply
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          • Christian EhrlicherC Christian Ehrlicher

            QString::toDouble() takes a bool which shows you if it could be correctly converted. Also you should print out the strings before trying to convert them to numbers.

            naaxN Offline
            naaxN Offline
            naax
            wrote on last edited by
            #9

            @Christian-Ehrlicher

            So? I think no, because of still the same problem. Not working

            QFile file(":/save/MealOne.txt");
                 if (file.open(QIODevice::ReadOnly | QIODevice::Text))
                 {
                     QTextStream in(&file);
                     in.setCodec("UTF-8");
            
                     while(!in.atEnd())
                     {
                         QString line = in.readLine();
                         QString line2 = in.readLine();
                         QString line3 = in.readLine();
                         QString line4 = in.readLine();
                         QString line5 = in.readLine();
            
                         ui->mealOneLeft->addItem(line);
            
                         ItemKcals.push_back(line2.toDouble());
                         ItemProteins.push_back(line3.toDouble());
                         ItemFats.push_back(line4.toDouble());
                         ItemCarbons.push_back(line5.toDouble());
            
                         ItemMap.insert(line, ItemMap.size());
                     }
            
                     file.close();
                 }
            
            
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            • Christian EhrlicherC Offline
              Christian EhrlicherC Offline
              Christian Ehrlicher
              Lifetime Qt Champion
              wrote on last edited by
              #10

              @naax said in QTextStream codec:

              So?

              You should check the conversion to your number! And you should print out the values with e.g. qDebug() or to a custom debug label or something else

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

              naaxN 1 Reply Last reply
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              • Christian EhrlicherC Christian Ehrlicher

                @naax said in QTextStream codec:

                So?

                You should check the conversion to your number! And you should print out the values with e.g. qDebug() or to a custom debug label or something else

                naaxN Offline
                naaxN Offline
                naax
                wrote on last edited by
                #11

                @Christian-Ehrlicher

                Same. Hmm, so I think the problem is with Item Map... Something broken, need to repair this.

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

                  @naax said in QTextStream codec:

                  so I think the problem is with Item Map

                  Did you actually implement what I suggested?

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

                  naaxN 1 Reply Last reply
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                  • Christian EhrlicherC Christian Ehrlicher

                    @naax said in QTextStream codec:

                    so I think the problem is with Item Map

                    Did you actually implement what I suggested?

                    naaxN Offline
                    naaxN Offline
                    naax
                    wrote on last edited by
                    #13

                    @Christian-Ehrlicher

                    Yes, all is correct here.

                    ee.png

                    So the problem is when I'm "Adding" items to other QListWidget. These same variables are not correct reading from ItemMap

                    //Add
                        Kcals[1]+=ItemKcals.at(ItemMap[ui->mealTwoLeft->currentItem()->text()]);
                        Proteins[1]+=ItemProteins.at(ItemMap[ui->mealTwoLeft->currentItem()->text()]);
                        Fats[1]+=ItemFats.at(ItemMap[ui->mealTwoLeft->currentItem()->text()]);
                        Carbons[1]+=ItemCarbons.at(ItemMap[ui->mealTwoLeft->currentItem()->text()]);
                    
                    
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                    • Christian EhrlicherC Offline
                      Christian EhrlicherC Offline
                      Christian Ehrlicher
                      Lifetime Qt Champion
                      wrote on last edited by
                      #14

                      Are you sure currentItem() is correct? Print it out (and use a temp variable for readability)

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

                      naaxN 1 Reply Last reply
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                      • Christian EhrlicherC Christian Ehrlicher

                        Are you sure currentItem() is correct? Print it out (and use a temp variable for readability)

                        naaxN Offline
                        naaxN Offline
                        naax
                        wrote on last edited by
                        #15

                        @Christian-Ehrlicher

                        Yes, he is. Current Item Name is correct, but other variables no. Should be 79, not 97 like by first item

                        eeq.png

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                        • naaxN Offline
                          naaxN Offline
                          naax
                          wrote on last edited by
                          #16

                          I resolved it.
                          The problem was with QMap. I used the same keys in two QListWidget. That's why my variables were not correct. Thx anyway for the help, I was sure that is a problem with the codec.

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