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  4. Is data received from serial port possible to view on two forms?
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Is data received from serial port possible to view on two forms?

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  • S Offline
    S Offline
    Shivam Sharma
    wrote on last edited by
    #15

    @J-Hilk @JonB

    Thank you so much guys. This really helped me. All the solutions that you'll constantly engaged me with really means a lot. Appreciate this.

    1 Reply Last reply
    2
    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #16

      Hi,

      One small addition, when passing QString around like that (but it is also valid for other classes), it's a good habit to use const references. This allows to avoid creating unneeded copies.

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

      1 Reply Last reply
      2
      • S Offline
        S Offline
        Shivam Sharma
        wrote on last edited by
        #17

        @J-Hilk @JonB Hi guys. Need one more help. If i want to add a push button on the Setup form that connects and disconnects the serial data incoming on both the forms how could I do that.

        This is the code for the push button, i can do it on the mainwindow form but unable to do it on the Setup form since it is not being able to access *serial.

        Code:

        void MainWindow::on_start_toggled(bool checked)
        {
            ui->start->setText(ui->start->isChecked() ? "Connect" : "Disconnect");
            if (checked)
            {
                serial->close();
                ui->start->setStyleSheet(QString("QPushButton {background-color: rgb(115, 210, 22);}"));
            }
            else
            {
                ui->start->setStyleSheet(QString("QPushButton {background-color: red;}"));
        
        
                   serial = new QSerialPort(this);
                   serial = new QSerialPort(this);
                   serial->setPortName("ttyUSB0");
                   serial->setBaudRate(QSerialPort::Baud9600);
                   serial->setDataBits(QSerialPort::Data8);
                   serial->setParity(QSerialPort::NoParity);
                   serial->setStopBits(QSerialPort::OneStop);
                   serial->setFlowControl(QSerialPort::NoFlowControl);
        
                   if( serial->open(QIODevice::ReadWrite))
                    {
                        qDebug()<<"Port Open OK";
                        connect(serial, &QSerialPort::readyRead, this, &MainWindow::serialReceived);
                    }
                  else
                    {
                        qDebug()<<"Can't Open Port : " << serial->error();
                    }
                   serialReceived();
            }
        }
        
        jsulmJ 1 Reply Last reply
        0
        • S Shivam Sharma

          @J-Hilk @JonB Hi guys. Need one more help. If i want to add a push button on the Setup form that connects and disconnects the serial data incoming on both the forms how could I do that.

          This is the code for the push button, i can do it on the mainwindow form but unable to do it on the Setup form since it is not being able to access *serial.

          Code:

          void MainWindow::on_start_toggled(bool checked)
          {
              ui->start->setText(ui->start->isChecked() ? "Connect" : "Disconnect");
              if (checked)
              {
                  serial->close();
                  ui->start->setStyleSheet(QString("QPushButton {background-color: rgb(115, 210, 22);}"));
              }
              else
              {
                  ui->start->setStyleSheet(QString("QPushButton {background-color: red;}"));
          
          
                     serial = new QSerialPort(this);
                     serial = new QSerialPort(this);
                     serial->setPortName("ttyUSB0");
                     serial->setBaudRate(QSerialPort::Baud9600);
                     serial->setDataBits(QSerialPort::Data8);
                     serial->setParity(QSerialPort::NoParity);
                     serial->setStopBits(QSerialPort::OneStop);
                     serial->setFlowControl(QSerialPort::NoFlowControl);
          
                     if( serial->open(QIODevice::ReadWrite))
                      {
                          qDebug()<<"Port Open OK";
                          connect(serial, &QSerialPort::readyRead, this, &MainWindow::serialReceived);
                      }
                    else
                      {
                          qDebug()<<"Can't Open Port : " << serial->error();
                      }
                     serialReceived();
              }
          }
          
          jsulmJ Offline
          jsulmJ Offline
          jsulm
          Lifetime Qt Champion
          wrote on last edited by
          #18

          @Shivam-Sharma Create a signal in Setup, connect that signal to clicked() signal of the button in Setup and then connect the signal you created in Setup (the first one I mentioned) to a slot in MainWindow where you can enable/disable the serial port.

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

          1 Reply Last reply
          2
          • S Offline
            S Offline
            Shivam Sharma
            wrote on last edited by
            #19

            I am sorry, but unable to understand. How do i connect the pushbutton to mainwindow from Setup form, since i cannot inherit the parent class, neither can i create an instance of it. Could you give a demo?

            jsulmJ 1 Reply Last reply
            0
            • S Shivam Sharma

              I am sorry, but unable to understand. How do i connect the pushbutton to mainwindow from Setup form, since i cannot inherit the parent class, neither can i create an instance of it. Could you give a demo?

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

              @Shivam-Sharma said in Is data received from serial port possible to view on two forms?:

              How do i connect the pushbutton to mainwindow from Setup form

              You don't, please read more carefully.

              class Setup
              {
              signals:
                  void onOffSerialPort();
              };
              
              void Setup::Setup()
              {
                  connect(ui->button, &QPushButton::clicked, this, &Setup::onOffSerialButton);
              }
              
              // MainWindow
              connect(setup, &Setup::onOffSerialButton, this, &MainWindow::onOffSerialButton);
              

              As you can see Setup does not know anything about MainWindow.

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

              1 Reply Last reply
              2
              • S Offline
                S Offline
                Shivam Sharma
                wrote on last edited by
                #21
                // MainWindow
                connect(setup, &Setup::onOffSerialButton, this, &MainWindow::onOffSerialButton);
                
                

                shouldn't all of this be

                onOffSerialPort
                

                and the last part be :

                &MainWindow::close);
                
                void Mainwindow::close()
                {
                serial->close();
                }
                jsulmJ 1 Reply Last reply
                0
                • S Shivam Sharma
                  // MainWindow
                  connect(setup, &Setup::onOffSerialButton, this, &MainWindow::onOffSerialButton);
                  
                  

                  shouldn't all of this be

                  onOffSerialPort
                  

                  and the last part be :

                  &MainWindow::close);
                  
                  void Mainwindow::close()
                  {
                  serial->close();
                  }
                  jsulmJ Offline
                  jsulmJ Offline
                  jsulm
                  Lifetime Qt Champion
                  wrote on last edited by
                  #22

                  @Shivam-Sharma Sorry, I don't understand what you mean. The code I provided is just to show the idea, you need to adapt it to your needs.

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

                  1 Reply Last reply
                  0
                  • J.HilkJ Offline
                    J.HilkJ Offline
                    J.Hilk
                    Moderators
                    wrote on last edited by J.Hilk
                    #23

                    let me expand on @jsulm example

                    first of in your mainwindow, create a new function, defined as a slot

                    and copy the content of your on button clicked in there

                    public slots:
                         void toggleSerial(bool checked);
                    
                    //mainwindow.cpp
                    void MainWindow:: toggleSerial(bool checked)
                    {
                          ui->start->setText(ui->start->isChecked() ? "Connect" : "Disconnect");
                              if (checked)
                              {
                                  serial->close();
                                  ui->start->setStyleSheet(QString("QPushButton {background-color: rgb(115, 210, 22);}"));
                              }
                              else
                              {
                                  ui->start->setStyleSheet(QString("QPushButton {background-color: red;}"));
                          
                          
                                     serial = new QSerialPort(this);
                                     serial = new QSerialPort(this);
                                     serial->setPortName("ttyUSB0");
                                     serial->setBaudRate(QSerialPort::Baud9600);
                                     serial->setDataBits(QSerialPort::Data8);
                                     serial->setParity(QSerialPort::NoParity);
                                     serial->setStopBits(QSerialPort::OneStop);
                                     serial->setFlowControl(QSerialPort::NoFlowControl);
                          
                                     if( serial->open(QIODevice::ReadWrite))
                                      {
                                          qDebug()<<"Port Open OK";
                                          connect(serial, &QSerialPort::readyRead, this, &MainWindow::serialReceived);
                                      }
                                    else
                                      {
                                          qDebug()<<"Can't Open Port : " << serial->error();
                                      }
                                     serialReceived();
                              }
                    }
                    void MainWindow::on_start_toggled(bool checked)
                    {
                        toggleSerial(checked);
                    }
                    

                    inside Setup add the signal like @jsulm suggested

                    signals:
                        void onOffSerialPort(bool checked);
                    

                    connect your button toggle signal (in Setup) to this signal (constructor of Setup

                    connect(ui->myButton, &QPushButton:: toggled, this, &Setup:: onOffSerialPort);
                    

                    and finally
                    connect that onOffSerialPort signal to your toggleSerial slot

                    connect(setup, &Setup:: onOffSerialPort, this, &MainWindow:: toggleSerial);
                    

                    one thing to keep in mind, your 2 buttons will now not necessarily show the correct checked status.

                    I'll let you figure that one out.


                    Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


                    Q: What's that?
                    A: It's blue light.
                    Q: What does it do?
                    A: It turns blue.

                    1 Reply Last reply
                    2
                    • S Offline
                      S Offline
                      Shivam Sharma
                      wrote on last edited by
                      #24

                      Error: no member named start in ui::mainwindow,

                      that is because it isn't able to access the pushbutton from setup window. Help please.

                      Also:
                      void MainWindow::on_start_toggled(bool checked)
                      {
                      toggleSerial(checked);
                      }
                      this also has errors saying: on_start_toggled doesn't match any declaration.

                      J.HilkJ jsulmJ JonBJ 3 Replies Last reply
                      0
                      • S Shivam Sharma

                        Error: no member named start in ui::mainwindow,

                        that is because it isn't able to access the pushbutton from setup window. Help please.

                        Also:
                        void MainWindow::on_start_toggled(bool checked)
                        {
                        toggleSerial(checked);
                        }
                        this also has errors saying: on_start_toggled doesn't match any declaration.

                        J.HilkJ Offline
                        J.HilkJ Offline
                        J.Hilk
                        Moderators
                        wrote on last edited by
                        #25

                        @Shivam-Sharma
                        where did you put this ?

                        public slots:
                             void toggleSerial(bool checked);
                        

                        in mainwindow.h or on setup.h ?


                        Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


                        Q: What's that?
                        A: It's blue light.
                        Q: What does it do?
                        A: It turns blue.

                        1 Reply Last reply
                        0
                        • S Offline
                          S Offline
                          Shivam Sharma
                          wrote on last edited by
                          #26

                          in mainwindow.h

                          1 Reply Last reply
                          0
                          • S Shivam Sharma

                            Error: no member named start in ui::mainwindow,

                            that is because it isn't able to access the pushbutton from setup window. Help please.

                            Also:
                            void MainWindow::on_start_toggled(bool checked)
                            {
                            toggleSerial(checked);
                            }
                            this also has errors saying: on_start_toggled doesn't match any declaration.

                            jsulmJ Offline
                            jsulmJ Offline
                            jsulm
                            Lifetime Qt Champion
                            wrote on last edited by
                            #27

                            @Shivam-Sharma said in Is data received from serial port possible to view on two forms?:

                            that is because it isn't able to access the pushbutton from setup window

                            I repeat it once more: YOU DO NOT HAVE TO ACCESS THIS BUTTON FROM MAIN WINDOW!
                            Please show your current code.

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

                            1 Reply Last reply
                            0
                            • S Offline
                              S Offline
                              Shivam Sharma
                              wrote on last edited by
                              #28

                              //mainwindow.h

                              #ifndef MAINWINDOW_H
                              #define MAINWINDOW_H
                              
                              #include <QMainWindow>
                              #include <info.h>
                              #include <setup.h>
                              
                              QT_BEGIN_NAMESPACE
                              namespace Ui { class MainWindow; }
                              QT_END_NAMESPACE
                              
                              class MainWindow : public QMainWindow
                              {
                                  Q_OBJECT
                              
                              public:
                                  MainWindow(QWidget *parent = nullptr);
                                  ~MainWindow();
                                  Info *info;
                                  Setup *setup;
                              
                              signals:
                                  void newSerialData(QString data);
                              
                              public slots:
                                      void toggleSerial(bool checked);
                              
                              private slots:
                                  void serialReceived();
                                  void on_infobutton_clicked();
                                  void on_setupbutton_clicked();
                              
                              private:
                                  Ui::MainWindow *ui;
                              
                              };
                              #endif // MAINWINDOW_H
                              

                              //mainwindow.cpp

                              #include "mainwindow.h"
                              #include "ui_mainwindow.h"
                              #include <info.h>
                              #include <setup.h>
                              
                              #include <QList>
                              #include <QComboBox>
                              #include <QString>
                              #include <QTextEdit>
                              #include <QTime>
                              #include <QDebug>
                              #include <QSerialPort>
                              #include <QtSerialPort/QSerialPortInfo>
                              #include <QFile>
                              #include <qmath.h>
                              #include <QList>
                              
                              QSerialPort *serial;
                              QString line;
                              QString txt1;
                              MainWindow::MainWindow(QWidget *parent)
                                  : QMainWindow(parent)
                                  , ui(new Ui::MainWindow)
                              {
                                     ui->setupUi(this);
                                     connect(setup, &Setup::onOffSerialPort, this, &MainWindow::toggleSerial);
                                     serial = new QSerialPort(this);
                                     serial = new QSerialPort(this);
                                     serial->setPortName("ttyUSB0");
                                     serial->setBaudRate(QSerialPort::Baud9600);
                                     serial->setDataBits(QSerialPort::Data8);
                                     serial->setParity(QSerialPort::NoParity);
                                     serial->setStopBits(QSerialPort::OneStop);
                                     serial->setFlowControl(QSerialPort::NoFlowControl);
                              
                                     if( serial->open(QIODevice::ReadWrite))
                                      {
                                          qDebug()<<"Port Open OK";
                                          connect(serial, &QSerialPort::readyRead, this, &MainWindow::serialReceived);
                                      }
                                    else
                                      {
                                          qDebug()<<"Can't Open Port : " << serial->error();
                                      }
                                     serialReceived();
                              }
                              
                              MainWindow::~MainWindow()
                              {
                                  delete ui;
                                  serial->close();
                              }
                              
                              char *get_field(char *str,int fld)
                              {
                                  static char t0[512];
                                  int i=0,j=0,k=0;
                                  while(i<512)
                                  {
                                      if(*(str+i) == ',' || *(str+i) == '\n')
                                      {
                                          if (fld==j) return t0;
                                              j++;
                                              t0[0]=0;
                                              k=0;
                                      }
                                      else
                                      {
                                          t0[k++]=*(str+i);
                                          t0[k]=0;
                                      }
                                      i++;
                                  }
                                      t0[0]=0;
                                      return t0;
                              }
                              
                              int checksum_gps(char *str)
                              {
                                  unsigned char cs=0,sum=0,i=0;
                                  char sCS[8], exit =0;
                              
                                  while (i<250 && !exit)
                                  {
                                      if(*(str+i) == '*')
                                      {
                                          sum=0;
                                          break;
                                      }
                                      if(sum)
                                          cs^=*(str+i);
                                      if(*(str+i) == '$')
                                          sum=1;
                                      if(*(str+i) == 0)
                                          exit=1;
                                      i++;
                                  }
                                  sprintf(sCS,"%02X",cs);
                                  if (memcmp(sCS,str+i+1,2)==0)
                                      return 1;
                                  return 0;
                              }
                              
                              char *timestamp(void)
                              {
                                  static char t0[128];
                                  long ms;
                                  time_t now;
                                  struct tm *t;
                                  struct timespec spec;
                              
                                  time(&now);
                                  t= localtime(&now);
                                  clock_gettime(CLOCK_REALTIME, &spec);
                                  ms= round(spec.tv_nsec/1.0e6);
                              
                                  sprintf(t0, "%04d/%02d/%02d %02d:%02d:%02d.%03ld ",
                                          t->tm_year+1900, t->tm_mon+1, t->tm_mday,
                                          t->tm_hour, t->tm_min, t->tm_sec, ms);
                                  return t0;
                              }
                              
                              void MainWindow::serialReceived()
                              {
                                  QByteArray serialData;
                                  serialData = serial->readAll();
                                  QString static receivedData = QString::fromStdString(serialData.toStdString());
                              
                                  char t0[512];
                                  static char t1[512];
                                  static int wp=0;
                                  unsigned int i=0;
                              
                                  QString filename="/home/user/Desktop/Programs/MainCBOT2/entrydata.txt";
                                  QFile file( filename );
                              
                                  if(file.open(QIODevice::WriteOnly | QIODevice::Append | QIODevice::Text))
                                  {
                                      QTextStream stream( &file );
                                      strcpy(t0,serialData);
                                      for (i=0;i<strlen(t0);i++)
                                      {
                                          t1[wp++]=t0[i];
                                          wp%=512;
                                          t1[wp]=0;
                              
                                          if(t0[i] == '\n')
                                          {
                                              wp=0;
                                              if(checksum_gps(t1))
                                              {
                                                  if(memcmp("$GPRMC",t1,6)==0)
                                                  {
                                                      unsigned int latcnt1=0, log_cnt1=0,spdcnt=0, cogcnt=0;
                                                      char cog[20];
                                                      char spd[20];
                                                      char lat1[20], lg1[20];
                                                      for(i=20;i<28;i++)
                                                      {
                                                          lat1[latcnt1++]=t1[i];
                                                      }
                                                      float j=atof(lat1);
                                                      float k=(int)(j/100);
                                                      float minlat  = j - ( k * 100 );
                                                      float ddeglat = k + ( minlat / 60 );
                                                      ui->latitude->setText(QString::number(ddeglat,'f'));
                              
                                                      for(i=33;i<42;i++)
                                                      {
                                                          lg1[log_cnt1++]=t1[i];
                                                      }
                                                      float p=atof(lg1);
                                                      float q=(int)(p/100);
                                                      float minlong  = p - ( q * 100 );
                                                      float ddeglong = q + ( minlong / 60 );
                                                      ui->longitude->setText(QString::number(ddeglong,'f'));
                              
                                                      for (i=45;i<50;i++)
                                                      {
                                                          spd[spdcnt++]=t1[i];
                                                      }
                                                      float r=atof(spd);
                                                      ui->speed->setText(QString::number(r,'f',4));
                              
                                                      for (i=50;i<56;i++)
                                                      {
                                                          cog[cogcnt++]=t1[i];
                                                      }
                                                      float u=atof((cog));
                                                      float w=u*0.514444;
                                                      ui->cog->setText(QString::number(w,'f',4));
                              
                                                      stream<<strcat(t1,timestamp());
                                                      ui->rece->setText(t1);
                                                      emit newSerialData(t1);
                                                      fflush(stdout);
                                                  }
                                              }
                                          }
                                      }
                                      file.close();
                                  }
                                  ui->timest->setText(timestamp());
                              }
                              
                              void MainWindow::on_infobutton_clicked()
                              {
                                  info = new Info(this);
                                  info->show();
                              }
                              
                              void MainWindow::on_setupbutton_clicked()
                              {
                                  setup = new Setup(this);
                                  setup->show();
                                  connect(this, &MainWindow::newSerialData, setup, &Setup::onNewSerialData);
                              }
                              
                              void MainWindow:: toggleSerial(bool checked)
                              {
                                        ui->start->setText(ui->start->isChecked() ? "Connect" : "Disconnect");
                                        if (checked)
                                        {
                                            serial->close();
                                           ui->start->setStyleSheet(QString("QPushButton {background-color: rgb(115, 210, 22);}"));
                                        }
                                        else
                                        {
                                            ui->start->setStyleSheet(QString("QPushButton {background-color: red;}"));
                              
                                               serial = new QSerialPort(this);
                                               serial = new QSerialPort(this);
                                               serial->setPortName("ttyUSB0");
                                               serial->setBaudRate(QSerialPort::Baud9600);
                                               serial->setDataBits(QSerialPort::Data8);
                                               serial->setParity(QSerialPort::NoParity);
                                               serial->setStopBits(QSerialPort::OneStop);
                                               serial->setFlowControl(QSerialPort::NoFlowControl);
                              
                                               if( serial->open(QIODevice::ReadWrite))
                                                {
                                                    qDebug()<<"Port Open OK";
                                                    connect(serial, &QSerialPort::readyRead, this, &MainWindow::serialReceived);
                                                }
                                              else
                                                {
                                                    qDebug()<<"Can't Open Port : " << serial->error();
                                                }
                                               serialReceived();
                                        }
                              }
                              
                              void MainWindow::on_start_toggled(bool checked)
                              {
                                  toggleSerial(checked);
                              }
                              

                              //setup.h

                              #ifndef SETUP_H
                              #define SETUP_H
                              #include <QDialog>
                              
                              namespace Ui {
                              class Setup;
                              }
                              
                              class Setup : public QDialog
                              {
                                  Q_OBJECT
                              
                              public:
                                  explicit Setup(QWidget *parent = nullptr);
                                  ~Setup();
                              
                              public slots:
                                   void onNewSerialData(QString data);
                              
                              signals:
                                    void onOffSerialPort(bool checked);
                              
                              private:
                                  Ui::Setup *ui;
                              };
                              
                              #endif // SETUP_H
                              

                              //setup.cpp

                              #include "setup.h"
                              #include "ui_setup.h"
                              #include <QSerialPortInfo>
                              #include <QFile>
                              #include <QSerialPort>
                              
                              Setup::Setup(QWidget *parent) :
                                  QDialog(parent),
                                  ui(new Ui::Setup)
                              {
                                  ui->setupUi(this);
                                  ui->start->setCheckable(true);
                                  connect(ui->start, &QPushButton::toggled, this, &Setup::onOffSerialPort);
                              
                                  QList<QSerialPortInfo> list;
                                  list = QSerialPortInfo::availablePorts();
                              
                                  for (int i= 0; i < list.length(); i++)
                                  {
                                      ui->comboBox->addItem(list[i].portName());
                                  }
                              
                                  ui->baudratebox->setInsertPolicy(QComboBox::NoInsert);
                                  ui->baudratebox->addItem(QStringLiteral("9600"), QSerialPort::Baud9600);
                                  ui->baudratebox->addItem(QStringLiteral("19200"), QSerialPort::Baud19200);
                                  ui->baudratebox->addItem(QStringLiteral("38400"), QSerialPort::Baud38400);
                                  ui->baudratebox->addItem(QStringLiteral("115200"), QSerialPort::Baud115200);
                              }
                              
                              Setup::~Setup()
                              {
                                  delete ui;
                              }
                              
                              void Setup::onNewSerialData(QString data)
                              {
                                   ui->receiver->append(data);
                              }
                              
                              1 Reply Last reply
                              0
                              • J.HilkJ Offline
                                J.HilkJ Offline
                                J.Hilk
                                Moderators
                                wrote on last edited by J.Hilk
                                #29
                                MainWindow::MainWindow(QWidget *parent)
                                    : QMainWindow(parent)
                                    , ui(new Ui::MainWindow)
                                {
                                       ui->setupUi(this);
                                       connect(setup, &Setup::onOffSerialPort, this, &MainWindow::toggleSerial);
                                

                                the connect here is wrong, I think I said, you should place it where you create (new Setup(this)) the setup object.

                                that would be here

                                void MainWindow::on_setupbutton_clicked()
                                {
                                    setup = new Setup(this);
                                    setup->show();
                                    connect(this, &MainWindow::newSerialData, setup, &Setup::onNewSerialData);
                                }
                                

                                Error: no member named start in ui::mainwindow,

                                We don't see the form (.ui) class of MainWindow did you change the object name of start there ?


                                Edit: you also removed the on_start_toggled declaration in MainWindow.h

                                you know what, the "ConnectByName" feature is crap anyway don't use it.
                                Remove on_start_toggled complete,
                                and add the following in the mainWindow constructor :

                                MainWindow::MainWindow(QWidget *parent)
                                    : QMainWindow(parent)
                                    , ui(new Ui::MainWindow)
                                {
                                       ui->setupUi(this);
                                       connect(ui->start, &QPushButton::toggled, this, &MainWindow::toggleSerial);
                                

                                Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


                                Q: What's that?
                                A: It's blue light.
                                Q: What does it do?
                                A: It turns blue.

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                                1
                                • S Shivam Sharma

                                  Error: no member named start in ui::mainwindow,

                                  that is because it isn't able to access the pushbutton from setup window. Help please.

                                  Also:
                                  void MainWindow::on_start_toggled(bool checked)
                                  {
                                  toggleSerial(checked);
                                  }
                                  this also has errors saying: on_start_toggled doesn't match any declaration.

                                  JonBJ Offline
                                  JonBJ Offline
                                  JonB
                                  wrote on last edited by
                                  #30

                                  @Shivam-Sharma said in Is data received from serial port possible to view on two forms?:

                                  Also:
                                  void MainWindow::on_start_toggled(bool checked)
                                  {
                                  toggleSerial(checked);
                                  }
                                  this also has errors saying: on_start_toggled doesn't match any declaration.

                                  You need to do what it says. Where is your declaration of this method in the .h file? I think you had it in setup.h, if you've moved the method to MainWindow then obviously you need to move the declaration too.

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                                  0
                                  • S Offline
                                    S Offline
                                    Shivam Sharma
                                    wrote on last edited by
                                    #31
                                    This post is deleted!
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                                    0
                                    • J.HilkJ Offline
                                      J.HilkJ Offline
                                      J.Hilk
                                      Moderators
                                      wrote on last edited by
                                      #32

                                      I think there was a miss conception, start is not a toggle button, but a QLabel or something.

                                      Anyway here's a working example

                                      https://github.com/DeiVadder/Topic111960

                                      btw, you leak memory (class instances) all over the place.


                                      Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


                                      Q: What's that?
                                      A: It's blue light.
                                      Q: What does it do?
                                      A: It turns blue.

                                      E 1 Reply Last reply
                                      5
                                      • S Offline
                                        S Offline
                                        Shivam Sharma
                                        wrote on last edited by
                                        #33

                                        Thank you so much @J-Hilk @jsulm .

                                        Helped a lot, i mean oh my god, you'll are the best support.

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                                        1
                                        • J.HilkJ J.Hilk

                                          I think there was a miss conception, start is not a toggle button, but a QLabel or something.

                                          Anyway here's a working example

                                          https://github.com/DeiVadder/Topic111960

                                          btw, you leak memory (class instances) all over the place.

                                          E Offline
                                          E Offline
                                          Everett
                                          wrote on last edited by Everett
                                          #34

                                          @J-Hilk said in Is data received from serial port possible to view on two forms?:

                                          I think there was a miss conception, start is not a toggle button, but a QLabel or something.

                                          Anyway here's a working example
                                          My Wegmans Connect
                                          https://github.com/DeiVadder/Topic111960

                                          btw, you leak memory (class instances) all over the place.

                                          yup thanks for pointing it out.

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