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#ifndef DIALOG_H

#define DIALOG_H



#include <QtGui/QDialog>

#include<QKeyEvent>

#include<pageone.h>

class Dialog : public QDialog

{

    Q_OBJECT

    

public:

    Dialog(QWidget *parent = 0);

    ~Dialog();

private:

    void keyPressEvent(QKeyEvent *event);

    PageOne *page;

 signals:

    void del();





};



#endif // DIALOG_H







#include <QDialog>

#include<QLabel>

class PageOne : public QDialog

{

    Q_OBJECT

public:

    explicit PageOne(QWidget *parent = 0);

    

signals:

    

public slots:



private:

    QLabel *label;

protected slots:

    void ShowLabel();



    

};





#include "dialog.h"

#include<pageone.h>

Dialog::Dialog(QWidget *parent)

    : QDialog(parent)

{   page=new PageOne(this);

    connect(this,SIGNAL(del()),page,SLOT(ShowLabel()));

}



Dialog::~Dialog()

{

    

}



void Dialog::keyPressEvent(QKeyEvent *event)

{if(event->key()==Qt::Key_1)

        emit del();



}





#include "pageone.h"

#include<QDebug>

PageOne::PageOne(QWidget *parent) :

    QDialog(parent)

{label=new QLabel("the first page",this);

}



void PageOne::ShowLabel()

{  label->show();

    qDebug()<<"afg";

}