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Creating a chart with multiple datas

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  • 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
                • D deleted286

                  @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 Offline
                  jsulmJ Offline
                  jsulm
                  Lifetime Qt Champion
                  wrote on last edited by
                  #24

                  @suslucoder said in Creating a chart with multiple datas:

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

                  Can't you simply use one queue?
                  If not then extend the readFile() method:

                  void MainWindow::ReadFile(const QString &file, QQueue<double> &queue)
                  {
                  ...
                  

                  And pass queue as second parameter.

                  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:

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

                    Can't you simply use one queue?
                    If not then extend the readFile() method:

                    void MainWindow::ReadFile(const QString &file, QQueue<double> &queue)
                    {
                    ...
                    

                    And pass queue as second parameter.

                    D Offline
                    D Offline
                    deleted286
                    wrote on last edited by
                    #25

                    @jsulm said in Creating a chart with multiple datas:

                    Can't you simply use one queue?

                    When i use one queue, how can i differ my datas?
                    Txt files have different values, and i will show all of them in a line chart with different color

                    jsulmJ 1 Reply Last reply
                    0
                    • D deleted286

                      @jsulm said in Creating a chart with multiple datas:

                      Can't you simply use one queue?

                      When i use one queue, how can i differ my datas?
                      Txt files have different values, and i will show all of them in a line chart with different color

                      jsulmJ Offline
                      jsulmJ Offline
                      jsulm
                      Lifetime Qt Champion
                      wrote on last edited by jsulm
                      #26

                      @suslucoder Then do like I suggested:

                      void MainWindow::ReadFile(const QString &file, QQueue<double> &queue)
                      {
                      ...
                      }
                      ...
                      ReadFile("/home/ilknur/FourLineChart/Data1.txt", queue);
                      ReadFile("/home/ilknur/FourLineChart/Data2.txt", queue1);
                      ReadFile("/home/ilknur/FourLineChart/Data3.txt", queue2);
                      ReadFile("/home/ilknur/FourLineChart/Data4.txt", queue3);
                      

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

                      D 1 Reply Last reply
                      1
                      • jsulmJ jsulm

                        @suslucoder Then do like I suggested:

                        void MainWindow::ReadFile(const QString &file, QQueue<double> &queue)
                        {
                        ...
                        }
                        ...
                        ReadFile("/home/ilknur/FourLineChart/Data1.txt", queue);
                        ReadFile("/home/ilknur/FourLineChart/Data2.txt", queue1);
                        ReadFile("/home/ilknur/FourLineChart/Data3.txt", queue2);
                        ReadFile("/home/ilknur/FourLineChart/Data4.txt", queue3);
                        
                        D Offline
                        D Offline
                        deleted286
                        wrote on last edited by
                        #27

                        @jsulm in .h file i have

                         ```
                         QQueue<double> queue;
                         QQueue<double> queue2;
                         QQueue<double> queue3;
                         QQueue<double> queue4;
                        
                        
                        Should i delete them?
                        jsulmJ 1 Reply Last reply
                        0
                        • D deleted286

                          @jsulm in .h file i have

                           ```
                           QQueue<double> queue;
                           QQueue<double> queue2;
                           QQueue<double> queue3;
                           QQueue<double> queue4;
                          
                          
                          Should i delete them?
                          jsulmJ Offline
                          jsulmJ Offline
                          jsulm
                          Lifetime Qt Champion
                          wrote on last edited by
                          #28

                          @suslucoder said in Creating a chart with multiple datas:

                          Should i delete them?

                          No. Why would you?

                          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:

                            Should i delete them?

                            No. Why would you?

                            D Offline
                            D Offline
                            deleted286
                            wrote on last edited by
                            #29
                            This post is deleted!
                            1 Reply Last reply
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