Picking input from a LineEdit fails

[Coop4Free]

Hi guys,

I tried to script a network client and server that send datas to each other. My problem in the project is a bug for that I've spent a lot of time to debug it but I couldn't. It is just in the Server. In the ServerSys.cpp file you can see two outputs. The first one should output the input of a LineEdit-Field and then a2. If I execute it the output is:

0
a2

In the LineEdit-Field, which I have checked several times that it is the right one, I write things in it like 12345. But the output stays at 0. If I add a button to the ui and call sendData() in the onClicked() function the output is right. So maybe in the ServerNet.cppfile something is wrong with the call of serverSys.sendData() but I don't know. I haven't found any solution.

Thank you for your answers!

Main.cpp:

#include "ServerSys.hpp"
#include "ServerNet.hpp"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    ServerNet serverNet;
    ServerSys serverSys;
    serverSys.show();
    return a.exec();
}

ServerNet.hpp:

#ifndef TCPSERVER_HPP
#define TCPSERVER_HPP

#include <QObject>
#include <QDebug>
#include <QTcpServer>
#include <QTcpSocket>

class ServerNet : public QObject
{
    Q_OBJECT

public:
    explicit ServerNet(QObject *parent = nullptr);
    void sendData(long long);

signals:

public slots:
    void newConnection();

private:
    QTcpServer *server;
    void receiveRequest();
};

#endif // TCPSERVER_HPP

ServerNet.cpp:

#include "ServerNet.hpp"
#include "ServerSys.hpp"
#include <string>
#include <iostream>
#include <QTcpServer>
#include <QTcpSocket>
#include <unistd.h>

static QTcpSocket *socket;

ServerNet::ServerNet(QObject *parent) : QObject(parent)
{
    server = new QTcpServer(this);
    connect(server, SIGNAL(newConnection()), this, SLOT(newConnection()));
    server->listen(QHostAddress::Any, 1234);
}

void ServerNet::newConnection()
{
    socket = server->nextPendingConnection();
    receiveRequest();
}

void ServerNet::receiveRequest()
{
    std::string receivedRequest;
    socket->waitForReadyRead(2000);
    receivedRequest = socket->readAll().toStdString();
    if(receivedRequest == "label270")
    {
        ServerSys serverSys;
        serverSys.sendData();
    }
    else
    {
        std::cout << "No valid data request" << std::endl;
        exit(1);
    }
}

void ServerNet::sendData(long long decLabel)
{
    socket->write(std::to_string(decLabel).c_str());
}

ServerSys.hpp:

#ifndef SERVERSYS_HPP
#define SERVERSYS_HPP

#include <QMainWindow>
#include <vector>

QT_BEGIN_NAMESPACE
namespace Ui { class ServerSys; }
QT_END_NAMESPACE

class ServerSys : public QMainWindow
{
    Q_OBJECT

public:
    ServerSys(QWidget *parent = nullptr);
    ~ServerSys();
    void sendData();

private slots:

private:
    Ui::ServerSys *ui;
    void getData(std::vector<long long>&);
};
#endif // SERVERSYS_HPP

ServerSys.cpp:

#include "ServerSys.hpp"
#include "ui_ServerSys.h"
#include "ServerNet.hpp"
#include <iostream>
#include <iomanip>
#include <sstream>
#include <math.h>
#include <algorithm>
#include <vector>
#include <string>
#include <QDesktopWidget>

ServerSys::ServerSys(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::ServerSys)
{
    ui->setupUi(this);
}

ServerSys::~ServerSys()
{
    delete ui;
}

void ServerSys::sendData()
{
    std::vector<long long> decTokens(8);
    std::vector<std::string> binTokens(8);
    std::vector<bool> binLabel;
    long long decLabel;

    getData(decTokens);

    ServerNet serverNet;
    serverNet.sendData(decLabel);
}

void ServerSys::getData(std::vector<long long> &decTokens)
{
    std::cout << ui->lineEdit_label_270->text().toLongLong() << std::endl;
    decTokens[0] = ui->lineEdit_label_270->text().toLongLong();
    decTokens[1] = ui->lineEdit_sdi_270->text().toLongLong();
    decTokens[2] = ui->lineEdit_distance_270->text().toLongLong();
    decTokens[3] = ui->lineEdit_lsb_270->text().toLongLong();
    decTokens[4] = ui->lineEdit_msb_270->text().toLongLong();
    decTokens[5] = 0;
    decTokens[6] = ui->lineEdit_ssm_270->text().toLongLong();
    decTokens[7] = ui->lineEdit_parity_270->text().toLongLong();
    std::cout << "a2" << std::endl;
}

[JonB]

@Coop4Free said in Picking input from a LineEdit fails:

long long decLabel;

getData(decTokens);

ServerNet serverNet;
serverNet.sendData(decLabel);

decLabel is an uninitialized variable. What else is there to say?