try to "promote" a new_project QDialog file

/ edit_project.h file

#ifndef EDIT_PROJECT_H
#define EDIT_PROJECT_H

#include <QWidget>
#include "new_project.h"


namespace Ui {
class edit_project;
}

class edit_project : public new_project
{
    Q_OBJECT

public:
    explicit edit_project(QWidget *parent = 0);
    ~edit_project();

signals:

public slots:

private:
   Ui::new_project          *ui_edit_project;
};



#endif // EDIT_PROJECT_H


//.cpp file

#include "ui_new_project.h"
#include "edit_project.h"



edit_project::edit_project(QWidget *parent) : new_project(parent),
                                              ui_edit_project(new Ui::new_project) {
    ui_edit_project->setupUi(this);
}

edit_project::~edit_project()
{

}