Write Ethernet data to Mainwindow ui label using signal slot

ELIF

I have a problem.I have an ethernet connection in ethernet class.I have to write data's (coming from ethernet) to ui label.Here is my ethernet class run method.

void ethernetthread::run(){

   printf("Connecting to hello world sever");
   void *context = zmq_ctx_new();
   void *requester=zmq_socket(context ,ZMQ_REQ);
   zmq_connect(requester,"tcp://localhost:5555");
   int request_nbr;
   for(request_nbr=0; request_nbr!=10; request_nbr++){
      char buffer[10];
      printf("Sending Hello %d\n" ,request_nbr);
      zmq_send(requester ,"abcde",10,0);
      zmq_recv(requester ,buffer,10,0);

      zmq_recv(requester,buffer,10,0);
   for(int i=0;i<10;i++){
      printf("%c :",buffer[i]);
      qDebug()<<"buffer["<<i<<"] : "<<buffer[i];
   }
   printf("Received World %d\n",request_nbr);
   }
   zmq_close(requester);
   zmq_ctx_destroy(context);

  }

Here is my MainWindow Class

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new
Ui::MainWindow)
{

timerCounter = new QTimer();
connect(timerCounter,SIGNAL(timeout()),this,SLOT(timer_label_test_slot()));
timerCounter->start(1000);

}

void MainWindow::timer_label_test_slot(){
this->ui->label->setText(QString::number(counter));
counter++;

}



   void MainWindow::timer_label_test_slot(){
   this->ui->label->setText(QString::number(counter));
   counter++;

   }

ethernet.h is here

#ifndef ETHERNETTHREAD_H
#define ETHERNETTHREAD_H
#include<QThread>
#include<QDebug>
#include"ethernetthread.h"
#include<zmq.h>
#include <QThread>
#include<zmq.hpp>
#include<QTimer>

class ethernetthread : public QThread
{
public:
    ethernetthread();
    void run();
;

#endif // ETHERNETTHREAD_H

So how can I connect this two classes? How can I show ethernet datas to ui label ? Maybe I should make signal slot mechanism between two seperate classes.

JonB

@ELIF said in Write Ethernet data to Mainwindow ui label using signal slot:

Maybe I should make signal slot mechanism between two seperate classes.

Yes indeed! Instead of needing any timer, have your thread raise a signal when it receives data and your UI have a slot on that to update whatever visually. It is very common to have signals/slots connected across classes/threads.

J.Hilk

@ELIF said in Write Ethernet data to Mainwindow ui label using signal slot:

zmq_socket

question do you have to use zmq functions and classes or are you free to choose? because Qt has https://doc.qt.io/qt-5/qtcpsocket.html that offers an asynchronous api. No need for threading