Slot & signaux C++

Main.cpp :


#include <QApplication>
#include "windows.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    Windows Windows;
    Windows.show();

    return app.exec();
}


windows.cpp :


#include "windows.h"
using namespace std;

Windows::Windows() : QWidget()
{
    setFixedSize(200, 100);

    m_slider = new QSlider(Qt::Horizontal, this);
    m_slider->setRange(200, 600);
    m_slider->setGeometry(10, 60, 150, 20);
    QObject::connect(m_slider, SIGNAL(valueChanged(int)), this, SLOT(changerLargeur(int)));
}


void Windows::changerLargeur(int largeur)
{
    setFixedSize(largeur, 100);
}


windows.h :


#ifndef WINDOWS_H
#define WINDOWS_H

#include <QObject>
#include <QApplication>
#include <QWidget>
#include <QPushButton>
#include <QSlider>

class Windows : public QWidget
{
    Q_OBJECT

protected:

    QSlider *m_slider;

public:

    Windows();

public slots:
    void changerLargeur(int largeur);
};


#endif // WINDOWS_H