How to get a variable from a thread? - c++

Question

I have a class that creates a server with multithreading. With the help of multithreading, I can connect several users at the same time. In one stream, the QByteArray Data is written, but I need this variable in the lane or in the lane heder, so that I can output this line (i.e., QByteArray Data). How I can tranfer var Data in my main function or header main?
I want write Data in QLable or somthing...
main.c
#include "groundstation.h"
#include <QApplication>
#include "server.h"
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
GroundStation w;
Server wServer;
wServer.StartServer();
//qDebug() << ServerThread::getString();
// QLabel *label = new QLabel();
//label->setText((QString));
w.show();
return a.exec();
}
server.cpp
#include "server.h"
Server::Server(QObject *parent) :
QTcpServer (parent)
{
}
void Server::StartServer(){
if(!this->listen(QHostAddress::Any, 1234)){
qDebug() << "Could not start server";
}
else {
qDebug() << "Listening...";
}
}
void Server::incomingConnection(int socketDescriptor){
qDebug() << socketDescriptor << "Connecting...";
ServerThread *thread = new ServerThread(socketDescriptor, this);
connect(thread, SIGNAL(finished()), thread, SLOT(deleteLater()));
thread->start();
}
sever.h
#ifndef SERVER_H
#define SERVER_H
#include <QTcpServer>
#include <QDebug>
#include "serverthread.h"
class Server : public QTcpServer
{
Q_OBJECT
public:
explicit Server(QObject *parent = 0);
void StartServer();
signals:
public slots:
protected:
void incomingConnection(int socketDescriptor);
};
#endif // SERVER_H
serverthread.cpp
#include "serverthread.h"
ServerThread::ServerThread(int id, QObject *parent) :
QThread (parent)
{
this->socketDescriptor = id;
}
void ServerThread::run(){
//thread starts here
qDebug() << socketDescriptor << " Starting thread";
socket = new QTcpSocket();
if(!socket->setSocketDescriptor(this->socketDescriptor)){
emit error(socket->error());
return;
}
connect(socket, SIGNAL(readyRead()), this, SLOT(readyRead()), Qt::DirectConnection);
connect(socket, SIGNAL(disconnected()), this, SLOT(disconnected()), Qt::DirectConnection);
qDebug() << socketDescriptor << " Client connected";
//make this thread a loop
exec();
}
void ServerThread::readyRead(){
Data = socket->readAll();
qDebug() << socketDescriptor << " Data in: " << Data;
socket->write(Data);
}
void ServerThread::disconnected(){
qDebug() << socketDescriptor << " Disconnected";
socket->deleteLater();
exit(0);
}
serverthread.h
#ifndef SERVERTHREAD_H
#define SERVERTHREAD_H
#include <QThread>
#include <QTcpSocket>
#include <QDebug>
class ServerThread : public QThread
{
Q_OBJECT
public:
QByteArray Data;
explicit ServerThread(int id, QObject *parent = 0);
void run();
signals:
void error(QTcpSocket::SocketError socketerror);
public slots:
void readyRead();
void disconnected();
public slots:
private:
QTcpSocket *socket;
int socketDescriptor;
};
#endif // SERVERTHREAD_H