Problem with Signal and Slots and QThread

[Informatix]

Hi everyone,
I have a trouble when I try to use signal and slots with QThread, when I write "void run();" in the Emisor's header and I implement it in the .cpp, the compilator says " :-1: error: collect2: ld returned 1 exit status" but if I omit these lines, It works. :S . I need to make my own run(), but I don't know why my program doesn't work.
Can anybody help me?

#ifndef EMISOR_H
#define EMISOR_H
 
#include <QThread>
 
 
class Emisor :  public QThread
{
    Q_OBJECT
public:
    Emisor();
    void llamar();
   virtual void run(); // if I comment this (and its implementation), it works
 
 
signals:
    void enviar();
};
 
#endif // EMISOR_H
 
//emisor.cpp
 
#include "emisor.h"
 
Emisor::Emisor()
{
}
 
void Emisor::llamar(){
    emit enviar();
}
 
//................
 
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QMainWindow>
 
namespace Ui {
    class MainWindow;
}
 
class MainWindow : public QMainWindow {
    Q_OBJECT
public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();
 
private:
    Ui::MainWindow *ui;
public slots:
    void recibir();
};
 
#endif // MAINWINDOW_H
 
//-----
 
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <emisor.h>
#include <stdio.h>
 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    Emisor e;
    connect(&e,SIGNAL(enviar()),this,SLOT(recibir()));
 
    e.llamar();
 
}
 
MainWindow::~MainWindow()
{
    delete ui;
 
 
}
 
void MainWindow::recibir(){
    printf("Hi");
 
}

#ifndef EMISOR_H
#define EMISOR_H

#include <QThread>


class Emisor :  public QThread
{
    Q_OBJECT
public:
    Emisor();
    void llamar();
   virtual void run(); // if I comment this (and its implementation), it works


signals:
    void enviar();
};

#endif // EMISOR_H

//emisor.cpp

#include "emisor.h"

Emisor::Emisor()
{
}

void Emisor::llamar(){
    emit enviar();
}

//................

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
    class MainWindow;
}

class MainWindow : public QMainWindow {
    Q_OBJECT
public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();

private:
    Ui::MainWindow *ui;
public slots:
    void recibir();
};

#endif // MAINWINDOW_H

//-----

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <emisor.h>
#include <stdio.h>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    Emisor e;
    connect(&e,SIGNAL(enviar()),this,SLOT(recibir()));

    e.llamar();

}

MainWindow::~MainWindow()
{
    delete ui;


}

void MainWindow::recibir(){
    printf("Hi");

}

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PD: sorry for my English

[squidge]

Wheres the implementation for run?

[Tio]

agreed, we need the run() function friend