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    Unsolved UI doesnt refresh correctly

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    qt5 serial port user interface
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    • D
      deleted286 last edited by

      Im reading some datas on serial port. My user ınterface doesnt refrest the datas correctly. I want to see the last data on my gui, which is coming from serial . How can i do it with a timer

      MainWindow::MainWindow(QWidget *parent)
          : QMainWindow(parent)
          , ui(new Ui::MainWindow)
      {
          ui->setupUi(this);
          count =0;
          serial = new QSerialPort();
          open_Serial();
          m_timer = new QTimer();
          connect(m_timer,SIGNAL(timeout()),this, SLOT(on_joystick()));
          m_timer->setInterval(20);
          m_timer->start();
      
      }
      MainWindow::~MainWindow()
      {
          delete ui;
      }
      void MainWindow::open_Serial()
      {
      
          serial->setPortName("/dev/ttyUSB0");
          serial->setBaudRate(QSerialPort::Baud115200);
          serial->setDataBits(QSerialPort::Data8);
          serial->setParity(QSerialPort::NoParity);
          serial->setStopBits(QSerialPort::OneStop);
          serial->setFlowControl(QSerialPort::NoFlowControl);
      
          if (serial->open(QIODevice::ReadWrite))
          {
                qDebug() << "ttyUSB0" << "is Open ";
                serial->clear();
                write_Json();
                connect(serial, &QSerialPort::readyRead, this, &MainWindow::on_Serial_Read);
              //connect(serial, &QSerialPort::readyRead, this, &MainWindow::on_joystick);
          }
      
          if(serial->isOpen())
          {
              ui->Open->setChecked(true);
          }
      
      //    if(serial->disconnect())
      //    {
      //        ui->Close->setChecked(true);
      //    }
      
      }
      void MainWindow::on_Serial_Read()
      {
          QByteArray data = serial->readAll();
      
          s= data.size();
          if (s>14)
              s=14;
      
          memcpy(dizi, data.constData(), 14);
      
          if(dizi[1] < -500 || dizi[1] > 500 ||
                  dizi[2] < -500 || dizi[2] > 500 ||
                  dizi[3] < -500 || dizi[3] > 500 ||
                  dizi[4] < -500 || dizi[4] > 500 ) {
             count ++;
              ui->lcdNumberError->display(count);
              qDebug() << "-->"<< dizi[1] << dizi[2]<< dizi[3]<< dizi[4]<< dizi[5]<< dizi[6];
          }
      
      }
      void MainWindow::on_joystick()
      {
      
          if(dizi[1] > 0 && dizi[1] < 600)
          {
              ui->progressBarAx->setValue(dizi[1]);
              ui->progressBarAxEksi->setValue(0);
          }
      
      
          if(dizi[2] > 0 && dizi[2] < 600)
          {
              ui->progressBarAy->setValue(dizi[2]);
              ui->progressBarAy->setValue(0);
          }
      
          if(dizi[3] > 0 && dizi[3] < 600 )
          {
              ui->progressBarBx->setValue(dizi[3]);
              ui->progressBarBxEksi->setValue(0);
          }
      
          if(dizi[4] > 0 && dizi[4] < 600 )
          {
              ui->progressBarBy->setValue(dizi[4]);
              ui->progressBarByEksi->setValue(0);
          }
      
      
          if(dizi[1] <0  )
          {
              //ui->progressBarAxEksi->setValue(dizi[1]*-1);
              ui->progressBarAxEksi->setValue(qAbs(dizi[1]));
          }
      
          if(dizi[2] <0 )
          {
              ui->progressBarAyEksi->setValue(qAbs(dizi[2]));
             // ui->progressBarAyEksi->setValue(dizi[2]*-1);
          }
      
          if(dizi[3] <0 )
          {
              //ui->progressBarBxEksi->setValue(dizi[3]*-1);
              ui->progressBarBxEksi->setValue(qAbs(dizi[3]));
          }
      
          if(dizi[4] <0 )
          {
            //ui->progressBarByEksi_2->setValue(dizi[4]*-1);
              ui->progressBarByEksi->setValue(qAbs(dizi[4]));
          }
      
      
              ui->lcdNumberAx->display(dizi[1]);
              ui->lcdNumberAy->display(dizi[2]);
              ui->lcdNumberBx->display(dizi[3]);
              ui->lcdNumberBy->display(dizi[4]);
      
              if(dizi[5] == 0)
              {
              //    ui->SwitchCSol->display(dizi[5]);
              //    ui->SwitchDSa->display(dizi[6]);
              ui->radioButtonSolO->setChecked(true);
              ui->radioButtonSagO->setChecked(false);
      
              }
              else if(dizi[5] == 1)
              {
              //    ui->SwitchCSol->display(dizi[5]);
              //    ui->SwitchDSa->display(dizi[6]);
              ui->radioButtonSolY->setChecked(true);
              ui->radioButtonSagY->setChecked(false);
      
              }
      
              else
              {
      
              ui->radioButtonSolA->setChecked(true);
              ui->radioButtonSagA->setChecked(false);
      
              }
      
              if(dizi[6] == 0)
              {
      
              ui->radioButtonSagO->setChecked(true);
              ui->radioButtonSolO->setChecked(false);
      
              }
              else if(dizi[6] == 1)
              {
      
              ui->radioButtonSagY->setChecked(true);
              ui->radioButtonSolY->setChecked(false);
      
              }
      
              else
              {
      
              ui->radioButtonSagA->setChecked(true);
              ui->radioButtonSolA->setChecked(false);
              }
      }
      
      1 Reply Last reply Reply Quote 0
      • mrjj
        mrjj Lifetime Qt Champion last edited by

        Hi
        Im not sure what you want to use a timer for.
        You already have
        connect(serial, &QSerialPort::readyRead, this, &MainWindow::on_Serial_Read);

        so when data comes, Qt calls your on_Serial_Read

        Calling the on_joystick from a timer will not work good as
        it will be very out of sync with on_Serial_Read and data in "dizi"
        might not been read in yet.

        So if you see odd data , it would be that timer seems very fast and at
        the first calls, the "dizi" will not have valid values as on_Serial_Read didnt trigger yet.

        D 1 Reply Last reply Reply Quote 0
        • D
          deleted286 @mrjj last edited by

          @mrjj my progress bar was stuck on some point. It doesnt see the correct data. I doesnt refresh yourselft when new data comes

          mrjj 1 Reply Last reply Reply Quote 0
          • mrjj
            mrjj Lifetime Qt Champion @deleted286 last edited by mrjj

            @suslucoder
            Did you check the incoming data ?
            Its more likely some unexpected with the data than any refresh problem.

            In on_Serial_Read when dont you just call on_joystick ? ( i assume on_joystick is where you set the data to the GUI)

            D 1 Reply Last reply Reply Quote 0
            • D
              deleted286 @mrjj last edited by

              @mrjj on serial read, im reading from serial and on_joystick i put the datas on my gui. Where should i call joystick

              connect(serial, &QSerialPort::readyRead, this, &MainWindow::on_Serial_Read);
                      //connect(serial, &QSerialPort::readyRead, this, &MainWindow::on_joystick);
              
              mrjj 1 Reply Last reply Reply Quote 0
              • mrjj
                mrjj Lifetime Qt Champion @deleted286 last edited by mrjj

                @suslucoder
                hi
                at the very end of :on_Serial_Read()

                so get signal, read data and call on_joystick to display the 14 data you just copied to dizi

                D 1 Reply Last reply Reply Quote 1
                • D
                  deleted286 @mrjj last edited by

                  @mrjj I did it like that. But i dont know why in some data, progress bar doesnt refresh.

                  mrjj 1 Reply Last reply Reply Quote 0
                  • mrjj
                    mrjj Lifetime Qt Champion @deleted286 last edited by

                    @suslucoder

                    well if dont move the bar, the most logical conclusion is that it gets the same value as before.

                    So put in
                    qDebug() << "-->"<< dizi[1] << dizi[2]<< dizi[3]<< dizi[4]<< dizi[5]<< dizi[6];
                    in on_joystick (in top)
                    and see when it dont move what data, if it still has the same value as before.

                    D 1 Reply Last reply Reply Quote 1
                    • D
                      deleted286 @mrjj last edited by

                      @mrjj said in UI doesnt refresh correctly:

                      qDebug() << "-->"<< dizi[1] << dizi[2]<< dizi[3]<< dizi[4]<< dizi[5]<< dizi[6];

                      I've checked, coming datas are true. Is there anything about threads? I have serial port and i have a gui. There may be something different about it

                      mrjj 1 Reply Last reply Reply Quote 0
                      • mrjj
                        mrjj Lifetime Qt Champion @deleted286 last edited by

                        @suslucoder
                        Hi
                        Only if you added threads yourself. else it cant be the issue.

                        So that data is right in top of on_joystick ?
                        that you are very sure about ?

                        Since we dont clear dizi between readyRead
                        it will have old values.

                        So waht excactly do you see ?
                        first it work, then it stops. or it never works ?

                        D 1 Reply Last reply Reply Quote 0
                        • D
                          deleted286 @mrjj last edited by

                          This post is deleted!
                          mrjj 1 Reply Last reply Reply Quote 0
                          • mrjj
                            mrjj Lifetime Qt Champion @deleted286 last edited by

                            @suslucoder
                            Well it cant really be stuck as such.
                            It means its current value is 15.

                            You dont have any loops or anything that would prevent it from redrawing ?

                            I think you will have to use the debugger and set breakpoint on the

                            ui->progressBarXXXX

                            and then see when you set data what it is.

                            Its very unlikely the Widget simply don't redraw as that normally makes them white/odd if
                            you have strangulated the event loop.

                            D 1 Reply Last reply Reply Quote 1
                            • D
                              deleted286 @mrjj last edited by

                              @mrjj I didnt understand what you mean. Am i doing something wrong?

                              mrjj 1 Reply Last reply Reply Quote 0
                              • mrjj
                                mrjj Lifetime Qt Champion @deleted286 last edited by mrjj

                                @suslucoder
                                Hi
                                Nope code looks fine but you seem think the widget would suddenly stop to draw and
                                they rarely do and if they do, then it's very clear as it then looked messed up.

                                So Im trying to guess at what could be wrong/go wrong.
                                I think its just something with the data but you seems sure the values are newer and higher than 15 so
                                I would like you to set a break point on the line where you set the progressbar value
                                and then run & stop and inspect value in the dubugger to be truely sure that a value higher than 15 comes.

                                other note, this line
                                memcpy(dizi, data.constData(), 14);

                                If less than 14 data comes, then old values are left in dizi.
                                and what happens if data.constData() is less than 14 ?

                                I think its something like that.

                                D 1 Reply Last reply Reply Quote 0
                                • D
                                  deleted286 @mrjj last edited by

                                  @mrjj data.constData() cant be less than 14. I set it. Its too weird

                                  mrjj 1 Reply Last reply Reply Quote 0
                                  • mrjj
                                    mrjj Lifetime Qt Champion @deleted286 last edited by mrjj

                                    @suslucoder
                                    Hi
                                    What you mean ?
                                    You dont set it at all

                                    QByteArray data = serial->readAll(); <<< this can read all from 1 to xxx bytes

                                    s= data.size(); << this is the size of data we read
                                    if (s>14)  << is is just some variable not related to data
                                        s=14;
                                    

                                    then we copy 14 from data
                                    memcpy(dizi, data.constData(), 14);

                                    so it dont matter how much data we actually got. we always copy 14

                                    D 1 Reply Last reply Reply Quote 2
                                    • D
                                      deleted286 @mrjj last edited by

                                      @mrjj said in UI doesnt refresh correctly:

                                      @suslucoder
                                      Hi
                                      What you mean ?

                                      I have

                                      int16_t dizi[7];
                                      

                                      Since I have an array which size is 7, i wrote something

                                      s= data.size(); 
                                      if (s>14)  
                                          s=14;
                                      
                                      mrjj 1 Reply Last reply Reply Quote 0
                                      • mrjj
                                        mrjj Lifetime Qt Champion @deleted286 last edited by

                                        @suslucoder

                                        But what do you then do with s to make it do anything ?

                                        D 1 Reply Last reply Reply Quote 0
                                        • D
                                          deleted286 @mrjj last edited by

                                          @mrjj Im just try to convert my binary data do int with that code script

                                          mrjj 1 Reply Last reply Reply Quote 0
                                          • mrjj
                                            mrjj Lifetime Qt Champion @deleted286 last edited by mrjj

                                            @suslucoder

                                            ok im not sure what s does.

                                            Anyway, could you try

                                            (in on_Serial_Read)
                                            memset(dizi, 0, 14);
                                            memcpy(dizi, data.constData(), data.size());

                                            in place ot the line
                                            memcpy(dizi, data.constData(), 14);

                                            and tell if it still stops at 15 ?

                                            1 Reply Last reply Reply Quote 0
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