QT app headers

//
//   MainWindow.h
//

#pragma once

#include <QWidget>
#include <QPushButton>
#include <QStackedLayout>

class MainWindow : public QWidget
{
    Q_OBJECT
    public:
        explicit MainWindow(QWidget *parent = 0);
    private:
        QStackedLayout *layout;
    public slots:
        void setPage(int index);
        void goToMenu();
};

//
//   MenuPage.h
//

#include <QWidget>
#include <QPushButton>
#include <QVBoxLayout>
#include <QSignalMapper>

#include <MainWindow.h>

class MenuPage : public QWidget
{
    public:
        explicit MenuPage(MainWindow *parent);
        void addButton();
    private:
        QVBoxLayout *layout;
        QSignalMapper *signalMapper;
        int nButtons;
};

//
//   SubPage.h
//

#include <QWidget>
#include <QPushButton>
#include <QLabel>

#include "MainWindow.h"

class SubPage : public QWidget
{
    Q_OBJECT
    public:
        explicit SubPage(const char message[], MainWindow *parent);
    private:
        QLabel *message;
        QPushButton *backButton;
};