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Forum Update on Monday, May 27th 2025

public function to set lineedit in mainwindow

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  • S Offline
    S Offline
    SGaist
    Lifetime Qt Champion
    wrote on 31 May 2018, 21:46 last edited by
    #13

    You are missing the & before the functions in the connect statement.

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

    T 1 Reply Last reply 1 Jun 2018, 06:58
    0
    • S SGaist
      31 May 2018, 21:46

      You are missing the & before the functions in the connect statement.

      T Offline
      T Offline
      TMJJ001
      wrote on 1 Jun 2018, 06:58 last edited by
      #14

      @SGaist

      Hi,

      Thanks, I indeed forgot those. But this didn't solve the problem.
      I still get:

      void  TSP::readingAvailable(TSP::valuesFromCanSensor) is protected
      

      No Idea what this means.

      Kind regards

      M 1 Reply Last reply 1 Jun 2018, 07:05
      0
      • T TMJJ001
        1 Jun 2018, 06:58

        @SGaist

        Hi,

        Thanks, I indeed forgot those. But this didn't solve the problem.
        I still get:

        void  TSP::readingAvailable(TSP::valuesFromCanSensor) is protected
        

        No Idea what this means.

        Kind regards

        M Offline
        M Offline
        mrjj
        Lifetime Qt Champion
        wrote on 1 Jun 2018, 07:05 last edited by
        #15

        @TMJJ001
        hi

        • void TSP::readingAvailable(TSP::valuesFromCanSensor) is protected

        means that in the TSP class its listed under protected.
        that means nobody from outside can call it.

        So are you sure that is the function you are meant to call ?
        who made the TSP class ?

        T 1 Reply Last reply 1 Jun 2018, 07:50
        0
        • M mrjj
          1 Jun 2018, 07:05

          @TMJJ001
          hi

          • void TSP::readingAvailable(TSP::valuesFromCanSensor) is protected

          means that in the TSP class its listed under protected.
          that means nobody from outside can call it.

          So are you sure that is the function you are meant to call ?
          who made the TSP class ?

          T Offline
          T Offline
          TMJJ001
          wrote on 1 Jun 2018, 07:50 last edited by TMJJ001 6 Jan 2018, 07:51
          #16

          @mrjj

          Thanks for the reply,

          I made the class myself.

          void readingAvailable(struct valuesFromCanSensor candatasend)
          

          this is the signal I emit in the tsp.cpp . In my tsp.h this function is under "signals:".
          (As in the above code.)

          This signal should call the function tspVisualize.

          So I don't get it why it is protected.

          M 1 Reply Last reply 1 Jun 2018, 08:25
          0
          • T TMJJ001
            1 Jun 2018, 07:50

            @mrjj

            Thanks for the reply,

            I made the class myself.

            void readingAvailable(struct valuesFromCanSensor candatasend)
            

            this is the signal I emit in the tsp.cpp . In my tsp.h this function is under "signals:".
            (As in the above code.)

            This signal should call the function tspVisualize.

            So I don't get it why it is protected.

            M Offline
            M Offline
            mrjj
            Lifetime Qt Champion
            wrote on 1 Jun 2018, 08:25 last edited by
            #17

            @TMJJ001

            its listed under protected in the .h file.

            T 1 Reply Last reply 1 Jun 2018, 08:34
            0
            • M mrjj
              1 Jun 2018, 08:25

              @TMJJ001

              its listed under protected in the .h file.

              T Offline
              T Offline
              TMJJ001
              wrote on 1 Jun 2018, 08:34 last edited by
              #18

              @mrjj

              Sorry but I don't see it. How is it under protected in the .h files?
              It is under "signals:", how is it then under protected.
              Looks like I'm missing something some thing big times!!

              Kind regards.

              M 1 Reply Last reply 1 Jun 2018, 08:45
              0
              • T TMJJ001
                1 Jun 2018, 08:34

                @mrjj

                Sorry but I don't see it. How is it under protected in the .h files?
                It is under "signals:", how is it then under protected.
                Looks like I'm missing something some thing big times!!

                Kind regards.

                M Offline
                M Offline
                mrjj
                Lifetime Qt Champion
                wrote on 1 Jun 2018, 08:45 last edited by mrjj 6 Jan 2018, 08:45
                #19

                @TMJJ001

                or maybe i do, but you are not showing any code so im just guessing. :)
                its normally what message means.

                T 1 Reply Last reply 1 Jun 2018, 09:10
                0
                • M mrjj
                  1 Jun 2018, 08:45

                  @TMJJ001

                  or maybe i do, but you are not showing any code so im just guessing. :)
                  its normally what message means.

                  T Offline
                  T Offline
                  TMJJ001
                  wrote on 1 Jun 2018, 09:10 last edited by
                  #20

                  @mrjj

                  Ok sorry, I will post my code again:

                  So Lets start with the mainwindow.h

                  #ifndef MAINWINDOW_H
                  #define MAINWINDOW_H
                  
                  #include <QMainWindow>
                  #include <tsp.h>
                  #include <QMessageBox>
                  
                  namespace Ui {
                  class MainWindow;
                  }
                  
                  class MainWindow : public QMainWindow
                  {
                      Q_OBJECT
                  
                  public:
                      explicit MainWindow(QWidget *parent = 0);
                      ~MainWindow();
                  
                  public slots:
                      void tspVisualize(struct valuesFromCanSensor candata); //This is the slot which get called after signal readingAvailable.
                  
                  private slots:
                  
                  private:
                      Ui::MainWindow *ui;
                  
                  };
                  
                  #endif // MAINWINDOW_H
                  

                  Next I will show the mainwindow.cpp file

                  #include "mainwindow.h"
                  #include "ui_mainwindow.h"
                  #include "canbus_socket.h"
                  #include "tsp.h"
                  
                  MainWindow::MainWindow(QWidget *parent) :
                      QMainWindow(parent),
                      ui(new Ui::MainWindow)
                  {
                      ui->setupUi(this);
                  }
                  
                  MainWindow::~MainWindow()
                  {
                      delete ui;
                  }
                  void MainWindow::on_searchButton_clicked()
                  {
                      TSP tsp_run(this);
                  	ui->Terminal_textEdit->appendPlainText("Start reading sensor");
                      tsp_run.can_tsp(ui->comboBox->currentText());							// Here I call the function can_tsp from the class TSP
                      connect(tsp_run,&TSP::readingAvailable,this,&MainWindow::tspVisualize);	// Here I connected the signal readingAvailable to the visualization.
                  }																			// readingAvailable will be called at the end of can_tsp and will pass a structure to tspVisualize
                  
                  
                  
                  void MainWindow::tspVisualize(struct valuesFromCanSensor candata)
                  {
                      qDebug()<< "ID " << candata.can_id;
                  	ui->DT_lineEdit->setText(QString::number(candata.can_id,16));
                  
                  	// ... and visualize all other parameters from the passed structure
                  
                  }
                  

                  next tsp.h

                  #ifndef TSP_H
                  #define TSP_H
                  
                  #include <QObject>
                  #include <QMessageBox>
                  #include "mainwindow.h"
                  #include <QDebug>
                  
                  class TSP : public QObject
                  {
                      Q_OBJECT
                  public:
                      explicit TSP(QObject *parent = 0);
                      ~TSP();
                  	
                  	struct valuesFromCanSensor{		// Set structure to send data to mainwindow.cpp
                          int can_id;
                          int can_DT;
                          int can_DN;
                          int can_SN;
                          int can_S;
                          int can_HW;
                          int can_SW;
                          int can_PV;
                          int can_OP;
                          int can_M;
                          int can_B;
                      };
                  
                  signals:
                      void readingAvailable(struct valuesFromCanSensor candatasend);			// Signal which sends the data 
                  
                  public slots:
                      void can_tsp(QString cranT);
                     
                  
                  private:
                      struct valuesFromCanSensor candata;		// initialize a new structure to save data into and send later on
                  
                  };
                  
                  #endif // TSP_H
                  

                  last tsp.cpp

                  
                  #include "tsp.h"
                  #include "canbus_socket.h"
                  #include <linux/can.h>
                  #include <linux/can/raw.h>
                  
                  TSP::TSP(QObject *parent) : QObject(parent)
                  {
                  
                  }
                  
                  TSP::~TSP()
                  {
                  
                  }
                  
                  int question=0;
                  
                  
                  void TSP::can_tsp(QString cranT)
                  {
                  
                      bool convStatus;
                      Canbus_Socket canbus;
                  
                      int bdr;
                      if(cranT=="CC2800-1")
                      {
                          bdr = 250000;
                      }
                  
                      canbus.open_port("can0",0);                       // init canbus
                  
                      /***********************************************/
                      /*Set the first message into struct and send it*/
                      /***********************************************/
                      struct can_frame ncandata;      /***************/
                      ncandata.can_dlc=2;             /***************/
                      ncandata.can_id= 0;             /***************/
                      ncandata.data[0]= 01;           /***************/
                      ncandata.data[1]=0;             /***************/
                      canbus.send_port(&ncandata);    /***************/
                      /***********************************************/
                      /***********************************************/
                  
                      qDebug()<<"Start messages on canbus";
                  
                      int loop = 1;
                      int *msgn;
                      while(loop==1)
                      {
                          msgn = canbus.read_port();
                          qDebug()<< "id = " << msgn[1];
                         if(msgn[1]!=0)
                         {
                              qDebug()<< "ID known: " << (msgn[1]-384);
                              loop=0;
                              canbus.close_port();
                         }
                      }
                      qDebug()<< "out of ID loop";
                      canbus.open_port("can0",(1408+msgn[1])-384);
                      qDebug()<< "port closed and new filter set";
                  
                  
                      while(question<10)
                      {
                          int fid[2];
                          //qDebug()<< "Start switch with question: " + QString::number(question,10);
                          switch(question)
                          {
                              case(0):	fid[0] =0;          fid[1] =32;     break;	// CAN ID of sensor
                              case(1):    fid[0] =0;          fid[1] =16;     break;	// CAN device type
                              case(2):    fid[0] =8;          fid[1] =16;     break;	// CAN device name
                              case(3):    fid[0] =11;         fid[1] =101;	break;	// CAN serial number
                              case(4):    fid[0] =0;          fid[1] =101;	break;	// CAN status
                              case(5):	fid[0] =9;          fid[1] =16;     break;	// HW ver`on
                              case(6):	fid[0] =10;         fid[1] =16;     break;	// SW version
                              case(7):	fid[0] =7;          fid[1] =101;	break;	// Profile version
                              case(8):	fid[0] =0;          fid[1] =96;     break;	// Operating parameters
                              case(9):	fid[0] =1;          fid[1] =96;     break;	// Measuring .units/revolution
                              case(10):   fid[0] =1;          fid[1] =32;     break;	// Bittiming
                          }
                  
                          /***********************************************/
                          /*Set the second message into struct and send it*/
                          /***********************************************//***************/
                          ncandata.can_dlc=8;                    /***************/
                          ncandata.can_id= 1536 + msgn[1]-384;   /***************/
                          ncandata.data[0]= 64;                  /***************/
                          ncandata.data[1]=fid[0];               /***************/
                          ncandata.data[2]=fid[1];               /***************/
                          ncandata.data[3]=0;                    /***************/
                          ncandata.data[4]=0;                    /***************/
                          ncandata.data[5]=0;                    /***************/
                          ncandata.data[6]=0;                    /***************/
                          ncandata.data[7]=0;                    /***************/
                          canbus.send_port(&ncandata);           /***************/
                          /***********************************************/
                          /***********************************************/
                  
                          int *msgn2 = canbus.read_port();
                          convStatus=false;
                          QString number = QString::number(msgn2[4],16);
                          QString number1 = QString::number(msgn2[3],16);
                  
                          QString setting0 = QString::number(msgn2[9],16);
                          QString setting1 = QString::number(msgn2[8],16);
                          QString setting2 = QString::number(msgn2[7],16);
                          QString setting3 = QString::number(msgn2[6],16);
                  
                  
                          if(number.length()<2)   number = "0" + number;                  // Make sure you have 2 numbers in your hex value
                          if(number1.length()<2)   number1 = "0" + number1;
                  
                          if(setting0.length()<2)   setting0 = "0" + setting0;
                          if(setting1.length()<2)   setting1 = "0" + setting1;
                          if(setting2.length()<2)   setting2 = "0" + setting2;
                          if(setting3.length()<2)   setting3 = "0" + setting3;
                  
                  
                          int idr = (number+number1).toUInt(&convStatus,16);
                          qDebug() << QString::number(idr);
                  
                          int frep = (setting0+setting1+setting2+setting3).toUInt(&convStatus,16);
                          qDebug() << "frep = "<< QString::number(frep);
                  
                          switch(idr)
                          {
                              case(8192): candata.can_id = frep;          question=1;     break;	// CANid
                              case(4096): candata.can_DT = frep;          question=2;     break;	// Device type
                              case(4104): candata.can_DN = frep;          question=3;     break;	// Device name
                              case(25867):candata.can_SN = frep;          question=4;     break;	// SN
                              case(25856):candata.can_S = frep;           question=5;     break;	// Status
                              case(4105): candata.can_HW = frep;          question=6;     break;	// HW version
                              case(4106): candata.can_SW = frep;          question=7;     break;	// SW version
                              case(25863):candata.can_PV = frep;          question=8;     break;	// Profile version
                              case(24576):candata.can_OP = frep;          question=9;     break;	// Operating parameters
                              case(24577):candata.can_M = frep;           question=10;    break;	// Measuring units/revolution
                              case(8193): candata.can_B = frep;           question=11;    break;	// bittiming
                          }
                  
                      }
                  
                      emit(readingAvailable(candata));		// send the signal so the data can be visualized in the mainwindow
                  
                  }
                  
                  
                  M 1 Reply Last reply 1 Jun 2018, 09:59
                  0
                  • T TMJJ001
                    1 Jun 2018, 09:10

                    @mrjj

                    Ok sorry, I will post my code again:

                    So Lets start with the mainwindow.h

                    #ifndef MAINWINDOW_H
                    #define MAINWINDOW_H
                    
                    #include <QMainWindow>
                    #include <tsp.h>
                    #include <QMessageBox>
                    
                    namespace Ui {
                    class MainWindow;
                    }
                    
                    class MainWindow : public QMainWindow
                    {
                        Q_OBJECT
                    
                    public:
                        explicit MainWindow(QWidget *parent = 0);
                        ~MainWindow();
                    
                    public slots:
                        void tspVisualize(struct valuesFromCanSensor candata); //This is the slot which get called after signal readingAvailable.
                    
                    private slots:
                    
                    private:
                        Ui::MainWindow *ui;
                    
                    };
                    
                    #endif // MAINWINDOW_H
                    

                    Next I will show the mainwindow.cpp file

                    #include "mainwindow.h"
                    #include "ui_mainwindow.h"
                    #include "canbus_socket.h"
                    #include "tsp.h"
                    
                    MainWindow::MainWindow(QWidget *parent) :
                        QMainWindow(parent),
                        ui(new Ui::MainWindow)
                    {
                        ui->setupUi(this);
                    }
                    
                    MainWindow::~MainWindow()
                    {
                        delete ui;
                    }
                    void MainWindow::on_searchButton_clicked()
                    {
                        TSP tsp_run(this);
                    	ui->Terminal_textEdit->appendPlainText("Start reading sensor");
                        tsp_run.can_tsp(ui->comboBox->currentText());							// Here I call the function can_tsp from the class TSP
                        connect(tsp_run,&TSP::readingAvailable,this,&MainWindow::tspVisualize);	// Here I connected the signal readingAvailable to the visualization.
                    }																			// readingAvailable will be called at the end of can_tsp and will pass a structure to tspVisualize
                    
                    
                    
                    void MainWindow::tspVisualize(struct valuesFromCanSensor candata)
                    {
                        qDebug()<< "ID " << candata.can_id;
                    	ui->DT_lineEdit->setText(QString::number(candata.can_id,16));
                    
                    	// ... and visualize all other parameters from the passed structure
                    
                    }
                    

                    next tsp.h

                    #ifndef TSP_H
                    #define TSP_H
                    
                    #include <QObject>
                    #include <QMessageBox>
                    #include "mainwindow.h"
                    #include <QDebug>
                    
                    class TSP : public QObject
                    {
                        Q_OBJECT
                    public:
                        explicit TSP(QObject *parent = 0);
                        ~TSP();
                    	
                    	struct valuesFromCanSensor{		// Set structure to send data to mainwindow.cpp
                            int can_id;
                            int can_DT;
                            int can_DN;
                            int can_SN;
                            int can_S;
                            int can_HW;
                            int can_SW;
                            int can_PV;
                            int can_OP;
                            int can_M;
                            int can_B;
                        };
                    
                    signals:
                        void readingAvailable(struct valuesFromCanSensor candatasend);			// Signal which sends the data 
                    
                    public slots:
                        void can_tsp(QString cranT);
                       
                    
                    private:
                        struct valuesFromCanSensor candata;		// initialize a new structure to save data into and send later on
                    
                    };
                    
                    #endif // TSP_H
                    

                    last tsp.cpp

                    
                    #include "tsp.h"
                    #include "canbus_socket.h"
                    #include <linux/can.h>
                    #include <linux/can/raw.h>
                    
                    TSP::TSP(QObject *parent) : QObject(parent)
                    {
                    
                    }
                    
                    TSP::~TSP()
                    {
                    
                    }
                    
                    int question=0;
                    
                    
                    void TSP::can_tsp(QString cranT)
                    {
                    
                        bool convStatus;
                        Canbus_Socket canbus;
                    
                        int bdr;
                        if(cranT=="CC2800-1")
                        {
                            bdr = 250000;
                        }
                    
                        canbus.open_port("can0",0);                       // init canbus
                    
                        /***********************************************/
                        /*Set the first message into struct and send it*/
                        /***********************************************/
                        struct can_frame ncandata;      /***************/
                        ncandata.can_dlc=2;             /***************/
                        ncandata.can_id= 0;             /***************/
                        ncandata.data[0]= 01;           /***************/
                        ncandata.data[1]=0;             /***************/
                        canbus.send_port(&ncandata);    /***************/
                        /***********************************************/
                        /***********************************************/
                    
                        qDebug()<<"Start messages on canbus";
                    
                        int loop = 1;
                        int *msgn;
                        while(loop==1)
                        {
                            msgn = canbus.read_port();
                            qDebug()<< "id = " << msgn[1];
                           if(msgn[1]!=0)
                           {
                                qDebug()<< "ID known: " << (msgn[1]-384);
                                loop=0;
                                canbus.close_port();
                           }
                        }
                        qDebug()<< "out of ID loop";
                        canbus.open_port("can0",(1408+msgn[1])-384);
                        qDebug()<< "port closed and new filter set";
                    
                    
                        while(question<10)
                        {
                            int fid[2];
                            //qDebug()<< "Start switch with question: " + QString::number(question,10);
                            switch(question)
                            {
                                case(0):	fid[0] =0;          fid[1] =32;     break;	// CAN ID of sensor
                                case(1):    fid[0] =0;          fid[1] =16;     break;	// CAN device type
                                case(2):    fid[0] =8;          fid[1] =16;     break;	// CAN device name
                                case(3):    fid[0] =11;         fid[1] =101;	break;	// CAN serial number
                                case(4):    fid[0] =0;          fid[1] =101;	break;	// CAN status
                                case(5):	fid[0] =9;          fid[1] =16;     break;	// HW ver`on
                                case(6):	fid[0] =10;         fid[1] =16;     break;	// SW version
                                case(7):	fid[0] =7;          fid[1] =101;	break;	// Profile version
                                case(8):	fid[0] =0;          fid[1] =96;     break;	// Operating parameters
                                case(9):	fid[0] =1;          fid[1] =96;     break;	// Measuring .units/revolution
                                case(10):   fid[0] =1;          fid[1] =32;     break;	// Bittiming
                            }
                    
                            /***********************************************/
                            /*Set the second message into struct and send it*/
                            /***********************************************//***************/
                            ncandata.can_dlc=8;                    /***************/
                            ncandata.can_id= 1536 + msgn[1]-384;   /***************/
                            ncandata.data[0]= 64;                  /***************/
                            ncandata.data[1]=fid[0];               /***************/
                            ncandata.data[2]=fid[1];               /***************/
                            ncandata.data[3]=0;                    /***************/
                            ncandata.data[4]=0;                    /***************/
                            ncandata.data[5]=0;                    /***************/
                            ncandata.data[6]=0;                    /***************/
                            ncandata.data[7]=0;                    /***************/
                            canbus.send_port(&ncandata);           /***************/
                            /***********************************************/
                            /***********************************************/
                    
                            int *msgn2 = canbus.read_port();
                            convStatus=false;
                            QString number = QString::number(msgn2[4],16);
                            QString number1 = QString::number(msgn2[3],16);
                    
                            QString setting0 = QString::number(msgn2[9],16);
                            QString setting1 = QString::number(msgn2[8],16);
                            QString setting2 = QString::number(msgn2[7],16);
                            QString setting3 = QString::number(msgn2[6],16);
                    
                    
                            if(number.length()<2)   number = "0" + number;                  // Make sure you have 2 numbers in your hex value
                            if(number1.length()<2)   number1 = "0" + number1;
                    
                            if(setting0.length()<2)   setting0 = "0" + setting0;
                            if(setting1.length()<2)   setting1 = "0" + setting1;
                            if(setting2.length()<2)   setting2 = "0" + setting2;
                            if(setting3.length()<2)   setting3 = "0" + setting3;
                    
                    
                            int idr = (number+number1).toUInt(&convStatus,16);
                            qDebug() << QString::number(idr);
                    
                            int frep = (setting0+setting1+setting2+setting3).toUInt(&convStatus,16);
                            qDebug() << "frep = "<< QString::number(frep);
                    
                            switch(idr)
                            {
                                case(8192): candata.can_id = frep;          question=1;     break;	// CANid
                                case(4096): candata.can_DT = frep;          question=2;     break;	// Device type
                                case(4104): candata.can_DN = frep;          question=3;     break;	// Device name
                                case(25867):candata.can_SN = frep;          question=4;     break;	// SN
                                case(25856):candata.can_S = frep;           question=5;     break;	// Status
                                case(4105): candata.can_HW = frep;          question=6;     break;	// HW version
                                case(4106): candata.can_SW = frep;          question=7;     break;	// SW version
                                case(25863):candata.can_PV = frep;          question=8;     break;	// Profile version
                                case(24576):candata.can_OP = frep;          question=9;     break;	// Operating parameters
                                case(24577):candata.can_M = frep;           question=10;    break;	// Measuring units/revolution
                                case(8193): candata.can_B = frep;           question=11;    break;	// bittiming
                            }
                    
                        }
                    
                        emit(readingAvailable(candata));		// send the signal so the data can be visualized in the mainwindow
                    
                    }
                    
                    
                    M Offline
                    M Offline
                    mrjj
                    Lifetime Qt Champion
                    wrote on 1 Jun 2018, 09:59 last edited by
                    #21

                    @TMJJ001

                    Hi
                    ok thats odd. looks ok from quick look.
                    must test in compiler to know for sure

                    anyway, i say

                    void MainWindow::on_searchButton_clicked()
                    {
                    TSP tsp_run(this);
                    ui->Terminal_textEdit->appendPlainText("Start reading sensor");
                    tsp_run.can_tsp(ui->comboBox->currentText()); // Here I call the function can_tsp from the class TSP
                    connect(tsp_run,&TSP::readingAvailable,this,&MainWindow::tspVisualize); // Here I connected the signal readingAvailable to the visualization.
                    }

                    TSP tsp_run(this); << wont this be DELETED long before it can ever say readingAvailable ?
                    its deleted as soon as on_searchButton_clicked ends since its local stack variable.

                    T 1 Reply Last reply 1 Jun 2018, 11:26
                    1
                    • M mrjj
                      1 Jun 2018, 09:59

                      @TMJJ001

                      Hi
                      ok thats odd. looks ok from quick look.
                      must test in compiler to know for sure

                      anyway, i say

                      void MainWindow::on_searchButton_clicked()
                      {
                      TSP tsp_run(this);
                      ui->Terminal_textEdit->appendPlainText("Start reading sensor");
                      tsp_run.can_tsp(ui->comboBox->currentText()); // Here I call the function can_tsp from the class TSP
                      connect(tsp_run,&TSP::readingAvailable,this,&MainWindow::tspVisualize); // Here I connected the signal readingAvailable to the visualization.
                      }

                      TSP tsp_run(this); << wont this be DELETED long before it can ever say readingAvailable ?
                      its deleted as soon as on_searchButton_clicked ends since its local stack variable.

                      T Offline
                      T Offline
                      TMJJ001
                      wrote on 1 Jun 2018, 11:26 last edited by
                      #22

                      @mrjj

                      Hi,

                      When I run this, it runs completely without issue.
                      I get the outputs in the terminal by "qDebug();", So I think this is fine no?

                      M 1 Reply Last reply 1 Jun 2018, 12:47
                      0
                      • T TMJJ001
                        1 Jun 2018, 11:26

                        @mrjj

                        Hi,

                        When I run this, it runs completely without issue.
                        I get the outputs in the terminal by "qDebug();", So I think this is fine no?

                        M Offline
                        M Offline
                        mrjj
                        Lifetime Qt Champion
                        wrote on 1 Jun 2018, 12:47 last edited by
                        #23

                        @TMJJ001
                        Ok, sounds ok then. Just looked fishy.
                        does tsp_run.can_tsp send the readingAvailable signal ?

                        T 1 Reply Last reply 1 Jun 2018, 13:36
                        0
                        • M mrjj
                          1 Jun 2018, 12:47

                          @TMJJ001
                          Ok, sounds ok then. Just looked fishy.
                          does tsp_run.can_tsp send the readingAvailable signal ?

                          T Offline
                          T Offline
                          TMJJ001
                          wrote on 1 Jun 2018, 13:36 last edited by
                          #24

                          @mrjj

                          Hi,

                          When I send the signal within my class without I have no problems at all. When I try to connect in the mainwindow I get the previous error. Now I was playing a bit with the connect in the main function. When I did the following I get no error, but the SLOT also doesn't get called.

                          connect(&tsp_run,SIGNAL(readingAvailable(),this,SLOT(tspVisualize());
                          
                          1 Reply Last reply
                          0
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                            M Offline
                            mrjj
                            Lifetime Qt Champion
                            wrote on 1 Jun 2018, 13:40 last edited by mrjj 6 Jan 2018, 13:41
                            #25

                            @TMJJ001
                            main function = main.cpp ?
                            when using old syntax, you should check return value to see if it works.

                            qDebug() << "works:" << connect(&tsp_run,SIGNAL(readingAvailable(),this,SLOT(tspVisualize());

                            T 1 Reply Last reply 1 Jun 2018, 13:51
                            0
                            • M mrjj
                              1 Jun 2018, 13:40

                              @TMJJ001
                              main function = main.cpp ?
                              when using old syntax, you should check return value to see if it works.

                              qDebug() << "works:" << connect(&tsp_run,SIGNAL(readingAvailable(),this,SLOT(tspVisualize());

                              T Offline
                              T Offline
                              TMJJ001
                              wrote on 1 Jun 2018, 13:51 last edited by
                              #26

                              @mrjj

                              Sorry in the mainwindow. NOT in the main!
                              Ok, When I do this I get "works:true". So this works.

                              But, In the function tspVisualize() I have written:

                              qDebug()<<"send to mainwindow";
                              

                              This I don't see in the terminal. Damn what is happening.

                              P 1 Reply Last reply 3 Jun 2018, 02:26
                              0
                              • T TMJJ001
                                1 Jun 2018, 13:51

                                @mrjj

                                Sorry in the mainwindow. NOT in the main!
                                Ok, When I do this I get "works:true". So this works.

                                But, In the function tspVisualize() I have written:

                                qDebug()<<"send to mainwindow";
                                

                                This I don't see in the terminal. Damn what is happening.

                                P Offline
                                P Offline
                                Pablo J. Rogina
                                wrote on 3 Jun 2018, 02:26 last edited by
                                #27

                                @TMJJ001 you may want to check this example

                                Upvote the answer(s) that helped you solve the issue
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                                T 1 Reply Last reply 4 Jun 2018, 10:00
                                3
                                • P Pablo J. Rogina
                                  3 Jun 2018, 02:26

                                  @TMJJ001 you may want to check this example

                                  T Offline
                                  T Offline
                                  TMJJ001
                                  wrote on 4 Jun 2018, 10:00 last edited by
                                  #28

                                  @Pablo-J.-Rogina
                                  Thanks for the time to make example code.
                                  It didn't work straight away, this because I use qt4.8 and you the newer one probably.
                                  So I changed your code to the older syntax to get it working.

                                  I would like to thank you and all others for there help!
                                  Again I learned a lot!

                                  Thanks for helping!

                                  1 Reply Last reply
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