Passing strings to SLOT function

[ashboi]

I'm not sure why I'm having an error saying that SIGNAL was not declared.

mainwindow.cpp:14:78: error: macro "SIGNAL" passed 3 arguments, but takes just 1
mainwindow.cpp: In constructor ‘MainWindow::MainWindow(QWidget*)’:
mainwindow.cpp:14:16: error: ‘SIGNAL’ was not declared in this scope
make: *** [mainwindow.o] Error 1

mainwindow.cpp:14:78: error: macro "SIGNAL" passed 3 arguments, but takes just 1
mainwindow.cpp: In constructor ‘MainWindow::MainWindow(QWidget*)’:
mainwindow.cpp:14:16: error: ‘SIGNAL’ was not declared in this scope
make: *** [mainwindow.o] Error 1

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Here is my code

mainwindow.cpp

#include "mainwindow.h"
#include "ui_main.h"
#include "socketthread.h"
#include <QApplication>
 
using namespace std;
 
MainWindow::MainWindow(QWidget *parent) :
    	QMainWindow(parent),
    	ui(new Ui::MainWindow)
{   	
	ui->setupUi(this);
	connect(this, SIGNAL(sendMessage(QString), SocketThread, SLOT(send(QString)));
}
 
MainWindow::~MainWindow()
{
    	delete ui;
}
 
void MainWindow::on_pushButton_clicked()
{
    	emit sendMessage("ABCD");
}

#include "mainwindow.h"
#include "ui_main.h"
#include "socketthread.h"
#include <QApplication>

using namespace std;

MainWindow::MainWindow(QWidget *parent) :
    	QMainWindow(parent),
    	ui(new Ui::MainWindow)
{   	
	ui->setupUi(this);
	connect(this, SIGNAL(sendMessage(QString), SocketThread, SLOT(send(QString)));
}

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

void MainWindow::on_pushButton_clicked()
{
    	emit sendMessage("ABCD");
}

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mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QMainWindow>
 
namespace Ui
{
    class MainWindow;
}
 
class MainWindow : public QMainWindow {
    	Q_OBJECT
 
public:
    	MainWindow(QWidget *parent = 0);
    	~MainWindow();
 
signals:
        void sendMessage(QString message);
 
private slots:
	void on_pushButton_clicked();
 
private:
	Ui::MainWindow *ui;
 
};
 
#endif // MAINWINDOW_H

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui
{
    class MainWindow;
}

class MainWindow : public QMainWindow {
    	Q_OBJECT

public:
    	MainWindow(QWidget *parent = 0);
    	~MainWindow();

signals:
        void sendMessage(QString message);

private slots:
	void on_pushButton_clicked();

private:
	Ui::MainWindow *ui;

};

#endif // MAINWINDOW_H

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socketthread.cpp

void SocketThread::run()
{
.....
.....
string_in = send(); // not sure how to connect the Qstring value here
.....
.....
}

void SocketThread::run()
{
.....
.....
string_in = send(); // not sure how to connect the Qstring value here
.....
.....
}

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socketthread.h

#ifndef SOCKET_H
#define SOCKET_H
#include <QThread>
 
class SocketThread : public QThread
{
     	Q_OBJECT
 
	public slots:
	void send(QString message);
 
	private:
     	void run();
};
#endif // SOCKET_H

#ifndef SOCKET_H
#define SOCKET_H
#include <QThread>

class SocketThread : public QThread
{
     	Q_OBJECT

	public slots:
	void send(QString message);

	private:
     	void run();
};
#endif // SOCKET_H

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