Unsolved Widget Server Client problem

[lolilol78]

Hello everybody, I have problem with the Server code of my widget.

It says : " expected class-name before '{' token "
And I searched over the internet but didnt find my solution

Here is the code :

#ifndef HELLOWORLDSERVER_H
#define HELLOWORLDSERVER_H

#include <QTcpServer>

#include "MainWindow.h"
class MainWindow;

class HelloWorldServer : public QTcpServer
{
public:

    Q_OBJECT

        public:
            HelloWorldServer(MainWindow* pHelloServer,QObject *parent=0);
        MainWindow* m_pHelloWindow;

        private slots:
            void readyRead();
            void disconnected();

        protected:
            void incomingConnection(int socketfd);

        private:
            QSet<QTcpSocket*> clients;


};

#endif // HELLOWORLDSERVER_H

I hope you will help me, Thank you

[SGaist]

Hi,

What does MainWindow.h look like ?

The Q_OBJECT macro should be in the private part of your class.

Out of curiosity, why does your QTcpServer have to know about your MainWindow ? That smells like tight coupling which is a bad idea.

[lolilol78]

@SGaist Thank you for your answer, I actually took a part of code from the internet.

Here is the the mainwindow.h :

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

#include "HelloWorldServer.h"

namespace Ui {
class MainWindow;
}
class HelloWorldServer;

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
    void addMessage(QString Msg);
    HelloWorldServer* m_pBoxServer;

private slots:
    void on_pushButtonStart_clicked();

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

I tried putting the Q_OBJECT into the private one and it gave me same errors with this one more : QTcpServer was not declared in this scope.

[lolilol78]

@lolilol78 Basically the widget for the client works fine (entering the ip adresse, the port, and connect push button.)

but the server is stuck

[SGaist]

Did you add QT += network to your .pro file ?

Your HelloWorldServer shouldn't know anything about MainWindow. You should have slots there that you will connect to the MainWindow appropriate signals.

[lolilol78]

@SGaist I added it yes .

What do you mean by shouldnt know anything about?

[SGaist]

Then can you show the complete error log ?

When you have XXX was not declared in this scope, it usually means that you didn't include the header which provides that class.

I mean that your HelloWorldServer shouldn't need to know where from its data are coming. Just give it an interface that allows to set whatever parameter it needs.

[lolilol78]

@SGaist ok i see. here is the full error log :

[SGaist]

You have circular dependencies.

[lolilol78]

@SGaist dont know about that, i will check the internet and come back to you. thank you for your help SGaist

[lolilol78]

@SGaist so it means that i have functions related to other .cpp inside my whole program?

(sorry it is all new to me)

[SGaist]

No, it means you are including MainWindow.h in HelloWorldServer.h and then HelloWorldServer.h in MainWindow.h