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Creating a chart with multiple datas

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qt5chart
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  • D deleted286

    @Pl45m4 is it correct?

    void MainWindow::Timer_Slot()
    {
        static float q_x=0;
        if(!queue.isEmpty())
        {
           double num=queue.dequeue();
           if (series->count()> 10)
                series->removePoints(0, 1);
           q_x += 0.1;
           series->append(q_x, num);
           chart->scroll(10, 0);
           chart->update();
           qDebug() << q_x << num;
         }
        
        static float q_x2=0;
        if(!queue2.isEmpty())
        {
           double num2=queue2.dequeue();
           if(series2->count()>10)
               series2->removePoints(0,1);
           q_x2 += 0.1;
           series2->append(q_x2, num2);
           chart->scroll(10, 0);
           chart->update();
           qDebug() << q_x2 << num2;
         }
        static float q_x3=0;
        if(!queue3.isEmpty())
        {
           double num3=queue3.dequeue();
           if(series3->count()>10)
               series3->removePoints(0,1);
           q_x3 += 0.1;
           series3->append(q_x3, num3);
           chart->scroll(10, 0);
           chart->update();
           qDebug() << q_x3 << num3;
         }
        
        static float q_x4=0;
        if(!queue4.isEmpty())
        {
           double num4=queue4.dequeue();
           if(series4->count()>10)
               series4->removePoints(0,1);
           q_x4 += 0.1;
           series4->append(q_x4, num4);
           chart->scroll(10, 0);
           //chart->update();
           qDebug() << q_x4 << num4;
         }
    }
    
    jsulmJ Offline
    jsulmJ Offline
    jsulm
    Lifetime Qt Champion
    wrote on last edited by
    #4

    @suslucoder said in Creating a chart with multiple datas:

    is it correct?

    It's almost the same - you're still putting same code several times...
    Implement a method which gets the queue as parameter and put

    static float q_x=0;
        if(!queue.isEmpty())
        {
           double num=queue.dequeue();
           if (series->count()> 10)
                series->removePoints(0, 1);
           q_x += 0.1;
           series->append(q_x, num);
           chart->scroll(10, 0);
           chart->update();
           qDebug() << q_x << num;
         }
    

    in that method. Then simply call this method for each queue. Simple, isn't it?

    https://forum.qt.io/topic/113070/qt-code-of-conduct

    D 1 Reply Last reply
    2
    • jsulmJ jsulm

      @suslucoder said in Creating a chart with multiple datas:

      is it correct?

      It's almost the same - you're still putting same code several times...
      Implement a method which gets the queue as parameter and put

      static float q_x=0;
          if(!queue.isEmpty())
          {
             double num=queue.dequeue();
             if (series->count()> 10)
                  series->removePoints(0, 1);
             q_x += 0.1;
             series->append(q_x, num);
             chart->scroll(10, 0);
             chart->update();
             qDebug() << q_x << num;
           }
      

      in that method. Then simply call this method for each queue. Simple, isn't it?

      D Offline
      D Offline
      deleted286
      wrote on last edited by
      #5

      @jsulm But i have 4 different queue, all them should be parameter?

      Pl45m4P jsulmJ 2 Replies Last reply
      0
      • D deleted286

        @Pl45m4 is it correct?

        void MainWindow::Timer_Slot()
        {
            static float q_x=0;
            if(!queue.isEmpty())
            {
               double num=queue.dequeue();
               if (series->count()> 10)
                    series->removePoints(0, 1);
               q_x += 0.1;
               series->append(q_x, num);
               chart->scroll(10, 0);
               chart->update();
               qDebug() << q_x << num;
             }
            
            static float q_x2=0;
            if(!queue2.isEmpty())
            {
               double num2=queue2.dequeue();
               if(series2->count()>10)
                   series2->removePoints(0,1);
               q_x2 += 0.1;
               series2->append(q_x2, num2);
               chart->scroll(10, 0);
               chart->update();
               qDebug() << q_x2 << num2;
             }
            static float q_x3=0;
            if(!queue3.isEmpty())
            {
               double num3=queue3.dequeue();
               if(series3->count()>10)
                   series3->removePoints(0,1);
               q_x3 += 0.1;
               series3->append(q_x3, num3);
               chart->scroll(10, 0);
               chart->update();
               qDebug() << q_x3 << num3;
             }
            
            static float q_x4=0;
            if(!queue4.isEmpty())
            {
               double num4=queue4.dequeue();
               if(series4->count()>10)
                   series4->removePoints(0,1);
               q_x4 += 0.1;
               series4->append(q_x4, num4);
               chart->scroll(10, 0);
               //chart->update();
               qDebug() << q_x4 << num4;
             }
        }
        
        Pl45m4P Offline
        Pl45m4P Offline
        Pl45m4
        wrote on last edited by
        #6

        @suslucoder

        You just merged your four functions into one. This doesn't change the fact that you have redundant code.

        @jsulm was faster :)


        If debugging is the process of removing software bugs, then programming must be the process of putting them in.

        ~E. W. Dijkstra

        D 1 Reply Last reply
        0
        • Pl45m4P Pl45m4

          @suslucoder

          You just merged your four functions into one. This doesn't change the fact that you have redundant code.

          @jsulm was faster :)

          D Offline
          D Offline
          deleted286
          wrote on last edited by
          #7

          @Pl45m4 I've declared my queues in my header, does it matter?

          1 Reply Last reply
          0
          • D deleted286

            @jsulm But i have 4 different queue, all them should be parameter?

            Pl45m4P Offline
            Pl45m4P Offline
            Pl45m4
            wrote on last edited by
            #8

            @suslucoder said in Creating a chart with multiple datas:

            But i have 4 different queue, all them should be parameter?

            Just loop your queues.

            Bad:

            if(!queue1.isEmpty())
                {
                   double num=queue1.dequeue();
                }
            if(!queue2.isEmpty())
                {
                   double num=queue2.dequeue();
                }
            if(!queue3.isEmpty())
                {
                   double num=queue3.dequeue();
                }
            

            Better:

            // Container with all your data or just pass one QQueue after another to your function
            QVector<QQueue<double> > data;
            
            for(int i = 0; i < data.size(); i++)
            {
               if(!data.at(i).isEmpty())
                {
                   double num=data.at(i).dequeue();
                   // ...
                }
            
            }
            

            If debugging is the process of removing software bugs, then programming must be the process of putting them in.

            ~E. W. Dijkstra

            1 Reply Last reply
            2
            • D deleted286

              @jsulm But i have 4 different queue, all them should be parameter?

              jsulmJ Offline
              jsulmJ Offline
              jsulm
              Lifetime Qt Champion
              wrote on last edited by
              #9

              @suslucoder said in Creating a chart with multiple datas:

              But i have 4 different queue, all them should be parameter?

              Yes, that's the idea:

              void MainWindow::someMethod(const QQueue<double> &queue)
              {
              ...
              }
              ...
              someMethod(queue);
              someMethod(queue1);
              someMethod(queue2);
              someMethod(queue3);
              

              Or do it like @Pl45m4 suggested.

              https://forum.qt.io/topic/113070/qt-code-of-conduct

              D 1 Reply Last reply
              2
              • jsulmJ jsulm

                @suslucoder said in Creating a chart with multiple datas:

                But i have 4 different queue, all them should be parameter?

                Yes, that's the idea:

                void MainWindow::someMethod(const QQueue<double> &queue)
                {
                ...
                }
                ...
                someMethod(queue);
                someMethod(queue1);
                someMethod(queue2);
                someMethod(queue3);
                

                Or do it like @Pl45m4 suggested.

                D Offline
                D Offline
                deleted286
                wrote on last edited by
                #10

                @jsulm I understand it now. How about the reading part?
                Can i do it like queue part?

                jsulmJ 1 Reply Last reply
                0
                • D deleted286

                  @jsulm I understand it now. How about the reading part?
                  Can i do it like queue part?

                  jsulmJ Offline
                  jsulmJ Offline
                  jsulm
                  Lifetime Qt Champion
                  wrote on last edited by
                  #11

                  @suslucoder said in Creating a chart with multiple datas:

                  Can i do it like queue part?

                  Why not?

                  https://forum.qt.io/topic/113070/qt-code-of-conduct

                  D 1 Reply Last reply
                  0
                  • jsulmJ jsulm

                    @suslucoder said in Creating a chart with multiple datas:

                    Can i do it like queue part?

                    Why not?

                    D Offline
                    D Offline
                    deleted286
                    wrote on last edited by
                    #12

                    @jsulm is it true?

                    void MainWindow::ReadFile()
                    {
                          QFile file("/home/ilknur/Chart/Data1.txt");
                          QFile file2("/home/ilknur/Chart/Data2.txt");
                          QFile file3("/home/ilknur/Chart/Data3.txt");
                          QFile file4("/home/ilknur/Chart/Data4.txt");
                    
                           if(file.open(QIODevice::ReadOnly))
                           {
                               QTextStream in(&file);
                               while (!in.atEnd()) {
                                   QString line = in.readLine();
                                   QStringList list = line.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                   for (const QString &entry : list)
                                   {
                                       double num = entry.toDouble();
                                       qDebug() << num;
                                       queue.enqueue(num);
                                   }
                               }
                           }
                    
                           if(file2.open(QIODevice::ReadOnly))
                           {
                               QTextStream in(&file2);
                               while (!in.atEnd()) {
                                   QString line2 = in.readLine();
                                   QStringList list2 = line2.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                   for (const QString &entry : list2)
                                   {
                                       double num2 = entry.toDouble();
                                       qDebug() << num2;
                                       queue2.enqueue(num2);
                                   }
                               }
                           }
                    
                           if(file3.open(QIODevice::ReadOnly))
                           {
                               QTextStream in(&file3);
                               while (!in.atEnd()) {
                                   QString line3 = in.readLine();
                                   QStringList list3 = line3.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                   for (const QString &entry : list3)
                                   {
                                       double num3 = entry.toDouble();
                                       qDebug() << num3;
                                       queue3.enqueue(num3);
                                   }
                               }
                           }
                    
                           if(file4.open(QIODevice::ReadOnly))
                           {
                               QTextStream in(&file4);
                               while (!in.atEnd()) {
                                   QString line4 = in.readLine();
                                   QStringList list4 = line4.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                   for (const QString &entry : list4)
                                   {
                                       double num4 = entry.toDouble();
                                       qDebug() << num4;
                                       queue4.enqueue(num4);
                                   }
                               }
                           }
                    }
                    
                    jsulmJ Pl45m4P 2 Replies Last reply
                    0
                    • D deleted286

                      @jsulm is it true?

                      void MainWindow::ReadFile()
                      {
                            QFile file("/home/ilknur/Chart/Data1.txt");
                            QFile file2("/home/ilknur/Chart/Data2.txt");
                            QFile file3("/home/ilknur/Chart/Data3.txt");
                            QFile file4("/home/ilknur/Chart/Data4.txt");
                      
                             if(file.open(QIODevice::ReadOnly))
                             {
                                 QTextStream in(&file);
                                 while (!in.atEnd()) {
                                     QString line = in.readLine();
                                     QStringList list = line.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                     for (const QString &entry : list)
                                     {
                                         double num = entry.toDouble();
                                         qDebug() << num;
                                         queue.enqueue(num);
                                     }
                                 }
                             }
                      
                             if(file2.open(QIODevice::ReadOnly))
                             {
                                 QTextStream in(&file2);
                                 while (!in.atEnd()) {
                                     QString line2 = in.readLine();
                                     QStringList list2 = line2.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                     for (const QString &entry : list2)
                                     {
                                         double num2 = entry.toDouble();
                                         qDebug() << num2;
                                         queue2.enqueue(num2);
                                     }
                                 }
                             }
                      
                             if(file3.open(QIODevice::ReadOnly))
                             {
                                 QTextStream in(&file3);
                                 while (!in.atEnd()) {
                                     QString line3 = in.readLine();
                                     QStringList list3 = line3.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                     for (const QString &entry : list3)
                                     {
                                         double num3 = entry.toDouble();
                                         qDebug() << num3;
                                         queue3.enqueue(num3);
                                     }
                                 }
                             }
                      
                             if(file4.open(QIODevice::ReadOnly))
                             {
                                 QTextStream in(&file4);
                                 while (!in.atEnd()) {
                                     QString line4 = in.readLine();
                                     QStringList list4 = line4.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                     for (const QString &entry : list4)
                                     {
                                         double num4 = entry.toDouble();
                                         qDebug() << num4;
                                         queue4.enqueue(num4);
                                     }
                                 }
                             }
                      }
                      
                      jsulmJ Offline
                      jsulmJ Offline
                      jsulm
                      Lifetime Qt Champion
                      wrote on last edited by jsulm
                      #13

                      @suslucoder said in Creating a chart with multiple datas:

                      is it true?

                      Of course not!
                      You again copy same code several times.
                      You already was shown how to do this correctly, I'm not going to explain the same second time...

                      https://forum.qt.io/topic/113070/qt-code-of-conduct

                      D 1 Reply Last reply
                      0
                      • jsulmJ jsulm

                        @suslucoder said in Creating a chart with multiple datas:

                        is it true?

                        Of course not!
                        You again copy same code several times.
                        You already was shown how to do this correctly, I'm not going to explain the same second time...

                        D Offline
                        D Offline
                        deleted286
                        wrote on last edited by
                        #14

                        @jsulm Can you explain it please for last time :(

                        jsulmJ 1 Reply Last reply
                        0
                        • D deleted286

                          @jsulm Can you explain it please for last time :(

                          jsulmJ Offline
                          jsulmJ Offline
                          jsulm
                          Lifetime Qt Champion
                          wrote on last edited by
                          #15

                          @suslucoder No, I did it above already...

                          https://forum.qt.io/topic/113070/qt-code-of-conduct

                          1 Reply Last reply
                          0
                          • D deleted286

                            @jsulm is it true?

                            void MainWindow::ReadFile()
                            {
                                  QFile file("/home/ilknur/Chart/Data1.txt");
                                  QFile file2("/home/ilknur/Chart/Data2.txt");
                                  QFile file3("/home/ilknur/Chart/Data3.txt");
                                  QFile file4("/home/ilknur/Chart/Data4.txt");
                            
                                   if(file.open(QIODevice::ReadOnly))
                                   {
                                       QTextStream in(&file);
                                       while (!in.atEnd()) {
                                           QString line = in.readLine();
                                           QStringList list = line.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                           for (const QString &entry : list)
                                           {
                                               double num = entry.toDouble();
                                               qDebug() << num;
                                               queue.enqueue(num);
                                           }
                                       }
                                   }
                            
                                   if(file2.open(QIODevice::ReadOnly))
                                   {
                                       QTextStream in(&file2);
                                       while (!in.atEnd()) {
                                           QString line2 = in.readLine();
                                           QStringList list2 = line2.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                           for (const QString &entry : list2)
                                           {
                                               double num2 = entry.toDouble();
                                               qDebug() << num2;
                                               queue2.enqueue(num2);
                                           }
                                       }
                                   }
                            
                                   if(file3.open(QIODevice::ReadOnly))
                                   {
                                       QTextStream in(&file3);
                                       while (!in.atEnd()) {
                                           QString line3 = in.readLine();
                                           QStringList list3 = line3.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                           for (const QString &entry : list3)
                                           {
                                               double num3 = entry.toDouble();
                                               qDebug() << num3;
                                               queue3.enqueue(num3);
                                           }
                                       }
                                   }
                            
                                   if(file4.open(QIODevice::ReadOnly))
                                   {
                                       QTextStream in(&file4);
                                       while (!in.atEnd()) {
                                           QString line4 = in.readLine();
                                           QStringList list4 = line4.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                           for (const QString &entry : list4)
                                           {
                                               double num4 = entry.toDouble();
                                               qDebug() << num4;
                                               queue4.enqueue(num4);
                                           }
                                       }
                                   }
                            }
                            
                            Pl45m4P Offline
                            Pl45m4P Offline
                            Pl45m4
                            wrote on last edited by Pl45m4
                            #16

                            @suslucoder

                            QString file("/home/ilknur/Chart/Data1.txt");
                            // ...
                            // ...
                            // all your files
                            
                            void MainWindow::ReadFile(QString file)
                            {
                              QFile(file);
                            
                                   if(file.open(QIODevice::ReadOnly))
                                   {
                                       QTextStream in(&file);
                                       while (!in.atEnd()) {
                                           QString line = in.readLine();
                                           QStringList list = line.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                           for (const QString &entry : list)
                                           {
                                               double num = entry.toDouble();
                                               qDebug() << num;
                                                // pick correct queue here
                                               queue.enqueue(num);
                                           }
                                       }
                                   }
                            }
                            

                            Then just call this read function ones for every file you want to read (with the file path as argument)

                            ReadFile(file);
                            

                            Or even make a QStringList with all your filenames and call this function for every element of your list.

                            To write "good" and clean code (OOP programming) , you'll need to stop that linear thinking (like script language). And even most of the script languages nowadays have functions, which you can define, to avoid writing the same code over and over and over again.

                            Doing something X times != writing it X times.
                            It's all about effiency (trying to avoid unnecessary things that will waste time, space and hardware ressources at runtime)


                            If debugging is the process of removing software bugs, then programming must be the process of putting them in.

                            ~E. W. Dijkstra

                            D 1 Reply Last reply
                            1
                            • Pl45m4P Pl45m4

                              @suslucoder

                              QString file("/home/ilknur/Chart/Data1.txt");
                              // ...
                              // ...
                              // all your files
                              
                              void MainWindow::ReadFile(QString file)
                              {
                                QFile(file);
                              
                                     if(file.open(QIODevice::ReadOnly))
                                     {
                                         QTextStream in(&file);
                                         while (!in.atEnd()) {
                                             QString line = in.readLine();
                                             QStringList list = line.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                             for (const QString &entry : list)
                                             {
                                                 double num = entry.toDouble();
                                                 qDebug() << num;
                                                  // pick correct queue here
                                                 queue.enqueue(num);
                                             }
                                         }
                                     }
                              }
                              

                              Then just call this read function ones for every file you want to read (with the file path as argument)

                              ReadFile(file);
                              

                              Or even make a QStringList with all your filenames and call this function for every element of your list.

                              To write "good" and clean code (OOP programming) , you'll need to stop that linear thinking (like script language). And even most of the script languages nowadays have functions, which you can define, to avoid writing the same code over and over and over again.

                              Doing something X times != writing it X times.
                              It's all about effiency (trying to avoid unnecessary things that will waste time, space and hardware ressources at runtime)

                              D Offline
                              D Offline
                              deleted286
                              wrote on last edited by
                              #17

                              @Pl45m4 where should i store

                              QString file("/home/ilknur/Chart/Data1.txt");
                              // ...
                              // ...
                              // all your files
                              
                              

                              And i have 4 different files. In this case,

                              QString file("/home/ilknur/FourLineChart/Data1.txt");
                              QString file2("/home/ilknur/FourLineChart/Data2.txt");
                              QString file3("/home/ilknur/FourLineChart/Data3.txt");
                              QString file4("/home/ilknur/FourLineChart/Data4.txt");
                              
                              Pl45m4P 1 Reply Last reply
                              0
                              • D deleted286

                                @Pl45m4 where should i store

                                QString file("/home/ilknur/Chart/Data1.txt");
                                // ...
                                // ...
                                // all your files
                                
                                

                                And i have 4 different files. In this case,

                                QString file("/home/ilknur/FourLineChart/Data1.txt");
                                QString file2("/home/ilknur/FourLineChart/Data2.txt");
                                QString file3("/home/ilknur/FourLineChart/Data3.txt");
                                QString file4("/home/ilknur/FourLineChart/Data4.txt");
                                
                                Pl45m4P Offline
                                Pl45m4P Offline
                                Pl45m4
                                wrote on last edited by
                                #18

                                @suslucoder said in Creating a chart with multiple datas:

                                where should i store

                                Do you even read what we wrote?

                                @Pl45m4 said in Creating a chart with multiple datas:

                                Then just call this read function ones for every file you want to read (with the file path as argument)
                                ReadFile(file);

                                Or even make a QStringList with all your filenames and call this function for every element of your list.

                                ^


                                If debugging is the process of removing software bugs, then programming must be the process of putting them in.

                                ~E. W. Dijkstra

                                D 1 Reply Last reply
                                0
                                • Pl45m4P Pl45m4

                                  @suslucoder said in Creating a chart with multiple datas:

                                  where should i store

                                  Do you even read what we wrote?

                                  @Pl45m4 said in Creating a chart with multiple datas:

                                  Then just call this read function ones for every file you want to read (with the file path as argument)
                                  ReadFile(file);

                                  Or even make a QStringList with all your filenames and call this function for every element of your list.

                                  ^

                                  D Offline
                                  D Offline
                                  deleted286
                                  wrote on last edited by
                                  #19

                                  @Pl45m4 said in

                                  Do you even read what we wrote?

                                  Of course. I just confused.

                                  QString file("/home/ilknur/FourLineChart/Data1.txt");
                                  QString file2("/home/ilknur/FourLineChart/Data2.txt");
                                  QString file3("/home/ilknur/FourLineChart/Data3.txt");
                                  QString file4("/home/ilknur/FourLineChart/Data4.txt");
                                  
                                  MainWindow::MainWindow(QWidget *parent)
                                     : QMainWindow(parent)
                                     , ui(new Ui::MainWindow)
                                  {
                                     ui->setupUi(this);
                                     CreateChart();
                                     ReadFile(file);
                                     ReadFile(file2);
                                     ReadFile(file3);
                                     ReadFile(file4);
                                  
                                  
                                  
                                  void MainWindow::ReadFile(QString file)
                                  {
                                         QFile(file);
                                  
                                        if(file.open(QIODevice::ReadOnly))
                                        {
                                            QTextStream in(&file);
                                            while (!in.atEnd()) {
                                                QString line = in.readLine();
                                                QStringList list = line.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                                for (const QString &entry : list)
                                                {
                                                    double num = entry.toDouble();
                                                    qDebug() << num;
                                                     // pick correct queue here
                                                    queue.enqueue(num);
                                                }
                                            }
                                        }
                                  }
                                  

                                  I miss something. But i dont know.

                                  jsulmJ 1 Reply Last reply
                                  0
                                  • D deleted286

                                    @Pl45m4 said in

                                    Do you even read what we wrote?

                                    Of course. I just confused.

                                    QString file("/home/ilknur/FourLineChart/Data1.txt");
                                    QString file2("/home/ilknur/FourLineChart/Data2.txt");
                                    QString file3("/home/ilknur/FourLineChart/Data3.txt");
                                    QString file4("/home/ilknur/FourLineChart/Data4.txt");
                                    
                                    MainWindow::MainWindow(QWidget *parent)
                                       : QMainWindow(parent)
                                       , ui(new Ui::MainWindow)
                                    {
                                       ui->setupUi(this);
                                       CreateChart();
                                       ReadFile(file);
                                       ReadFile(file2);
                                       ReadFile(file3);
                                       ReadFile(file4);
                                    
                                    
                                    
                                    void MainWindow::ReadFile(QString file)
                                    {
                                           QFile(file);
                                    
                                          if(file.open(QIODevice::ReadOnly))
                                          {
                                              QTextStream in(&file);
                                              while (!in.atEnd()) {
                                                  QString line = in.readLine();
                                                  QStringList list = line.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                                  for (const QString &entry : list)
                                                  {
                                                      double num = entry.toDouble();
                                                      qDebug() << num;
                                                       // pick correct queue here
                                                      queue.enqueue(num);
                                                  }
                                              }
                                          }
                                    }
                                    

                                    I miss something. But i dont know.

                                    jsulmJ Offline
                                    jsulmJ Offline
                                    jsulm
                                    Lifetime Qt Champion
                                    wrote on last edited by jsulm
                                    #20

                                    @suslucoder I really don't understand why it is so hard! Please try to figure out such trivial things by yourself.

                                    MainWindow::MainWindow(QWidget *parent)
                                       : QMainWindow(parent)
                                       , ui(new Ui::MainWindow)
                                    {
                                       ui->setupUi(this);
                                       CreateChart();
                                       QString file("/home/ilknur/FourLineChart/Data1.txt");
                                       QString file2("/home/ilknur/FourLineChart/Data2.txt");
                                       QString file3("/home/ilknur/FourLineChart/Data3.txt");
                                       QString file4("/home/ilknur/FourLineChart/Data4.txt");
                                       ReadFile(file);
                                       ReadFile(file2);
                                       ReadFile(file3);
                                       ReadFile(file4);
                                    

                                    Or shorter:

                                    
                                    MainWindow::MainWindow(QWidget *parent)
                                       : QMainWindow(parent)
                                       , ui(new Ui::MainWindow)
                                    {
                                       ui->setupUi(this);
                                       CreateChart();
                                       ReadFile("/home/ilknur/FourLineChart/Data1.txt");
                                       ReadFile("/home/ilknur/FourLineChart/Data2.txt");
                                       ReadFile("/home/ilknur/FourLineChart/Data3.txt");
                                       ReadFile("/home/ilknur/FourLineChart/Data4.txt");
                                    

                                    https://forum.qt.io/topic/113070/qt-code-of-conduct

                                    D 1 Reply Last reply
                                    0
                                    • jsulmJ jsulm

                                      @suslucoder I really don't understand why it is so hard! Please try to figure out such trivial things by yourself.

                                      MainWindow::MainWindow(QWidget *parent)
                                         : QMainWindow(parent)
                                         , ui(new Ui::MainWindow)
                                      {
                                         ui->setupUi(this);
                                         CreateChart();
                                         QString file("/home/ilknur/FourLineChart/Data1.txt");
                                         QString file2("/home/ilknur/FourLineChart/Data2.txt");
                                         QString file3("/home/ilknur/FourLineChart/Data3.txt");
                                         QString file4("/home/ilknur/FourLineChart/Data4.txt");
                                         ReadFile(file);
                                         ReadFile(file2);
                                         ReadFile(file3);
                                         ReadFile(file4);
                                      

                                      Or shorter:

                                      
                                      MainWindow::MainWindow(QWidget *parent)
                                         : QMainWindow(parent)
                                         , ui(new Ui::MainWindow)
                                      {
                                         ui->setupUi(this);
                                         CreateChart();
                                         ReadFile("/home/ilknur/FourLineChart/Data1.txt");
                                         ReadFile("/home/ilknur/FourLineChart/Data2.txt");
                                         ReadFile("/home/ilknur/FourLineChart/Data3.txt");
                                         ReadFile("/home/ilknur/FourLineChart/Data4.txt");
                                      
                                      D Offline
                                      D Offline
                                      deleted286
                                      wrote on last edited by
                                      #21

                                      @jsulm said in Creating a chart with multiple datas:

                                      MainWindow::MainWindow(QWidget *parent)
                                      : QMainWindow(parent)
                                      , ui(new Ui::MainWindow)
                                      {
                                      ui->setupUi(this);
                                      CreateChart();
                                      ReadFile("/home/ilknur/FourLineChart/Data1.txt");
                                      ReadFile("/home/ilknur/FourLineChart/Data2.txt");
                                      ReadFile("/home/ilknur/FourLineChart/Data3.txt");
                                      ReadFile("/home/ilknur/FourLineChart/Data4.txt");

                                      I've do it in that way and i have

                                      void MainWindow::ReadFile(QString file)
                                      {
                                             QFile(file);
                                      
                                             if(file.open(QIODevice::ReadOnly))
                                             {
                                                 QTextStream in(&file);
                                                 while (!in.atEnd()) {
                                                     QString line = in.readLine();
                                                     QStringList list = line.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                                     for (const QString &entry : list)
                                                     {
                                                         double num = entry.toDouble();
                                                         qDebug() << num;
                                                          // pick correct queue here
                                                         queue.enqueue(num);
                                                     }
                                                 }
                                             }
                                      }
                                      

                                      I've got a lot of errors:

                                      : In member function ‘void MainWindow::ReadFile(QString)’:
                                      : error: declaration of ‘QFile file’ shadows a parameter
                                      error: declaration of ‘QFile file’ shadows a parameter
                                      QFile(file);
                                      ^

                                      jsulmJ 1 Reply Last reply
                                      0
                                      • D deleted286

                                        @jsulm said in Creating a chart with multiple datas:

                                        MainWindow::MainWindow(QWidget *parent)
                                        : QMainWindow(parent)
                                        , ui(new Ui::MainWindow)
                                        {
                                        ui->setupUi(this);
                                        CreateChart();
                                        ReadFile("/home/ilknur/FourLineChart/Data1.txt");
                                        ReadFile("/home/ilknur/FourLineChart/Data2.txt");
                                        ReadFile("/home/ilknur/FourLineChart/Data3.txt");
                                        ReadFile("/home/ilknur/FourLineChart/Data4.txt");

                                        I've do it in that way and i have

                                        void MainWindow::ReadFile(QString file)
                                        {
                                               QFile(file);
                                        
                                               if(file.open(QIODevice::ReadOnly))
                                               {
                                                   QTextStream in(&file);
                                                   while (!in.atEnd()) {
                                                       QString line = in.readLine();
                                                       QStringList list = line.split(QLatin1Char(' '), QString::SkipEmptyParts);
                                                       for (const QString &entry : list)
                                                       {
                                                           double num = entry.toDouble();
                                                           qDebug() << num;
                                                            // pick correct queue here
                                                           queue.enqueue(num);
                                                       }
                                                   }
                                               }
                                        }
                                        

                                        I've got a lot of errors:

                                        : In member function ‘void MainWindow::ReadFile(QString)’:
                                        : error: declaration of ‘QFile file’ shadows a parameter
                                        error: declaration of ‘QFile file’ shadows a parameter
                                        QFile(file);
                                        ^

                                        jsulmJ Offline
                                        jsulmJ Offline
                                        jsulm
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #22

                                        @suslucoder said in Creating a chart with multiple datas:

                                        QFile(file);

                                        Again easy to fix:

                                        void MainWindow::ReadFile(QString filePath)
                                        {
                                               QFile file(filePath);
                                        
                                               if(file.open(QIODevice::ReadOnly))
                                        

                                        https://forum.qt.io/topic/113070/qt-code-of-conduct

                                        D 1 Reply Last reply
                                        0
                                        • jsulmJ jsulm

                                          @suslucoder said in Creating a chart with multiple datas:

                                          QFile(file);

                                          Again easy to fix:

                                          void MainWindow::ReadFile(QString filePath)
                                          {
                                                 QFile file(filePath);
                                          
                                                 if(file.open(QIODevice::ReadOnly))
                                          
                                          D Offline
                                          D Offline
                                          deleted286
                                          wrote on last edited by
                                          #23

                                          @jsulm okey. We did it in that way. But i have

                                          void MainWindow::Timer_Slot()
                                          {
                                              static float q_x=0;
                                              static float q_x2=0;
                                              static float q_x3=0;
                                              static float q_x4=0;
                                          
                                              if(!queue.isEmpty())
                                                  {
                                                     double num=queue.dequeue();
                                                     q_x += 0.1;
                                                     series->append(q_x, num);
                                                     chart->scroll(10, 0);
                                                     chart->update();
                                                     qDebug() << q_x << num;
                                          
                                                  }
                                              if(!queue2.isEmpty())
                                                  {
                                                     double num2=queue2.dequeue();
                                                     q_x2 += 0.1;
                                                     series2->append(q_x2, num2);
                                                     chart->scroll(10, 0);
                                                     chart->update();
                                                     qDebug() << q_x2 << num2;
                                          
                                          
                                                  }
                                              if(!queue3.isEmpty())
                                                  {
                                                     double num3=queue3.dequeue();
                                                     q_x3 += 0.1;
                                                     series3->append(q_x3, num3);
                                                     chart->scroll(10, 0);
                                                     chart->update();
                                                  }
                                          
                                              if(!queue4.isEmpty())
                                                  {
                                                     double num4=queue4.dequeue();
                                                     q_x4 += 0.1;
                                                     series4->append(q_x4, num4);
                                                     chart->scroll(10, 0);
                                                     chart->update();
                                                  }
                                          }
                                          

                                          What will happen my other queues, in ReadFile() ?

                                          jsulmJ 1 Reply Last reply
                                          0

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