show object (scene) in widget in class class mainwindow

[rimie23]

Hi,
it's me again
i create project qt+ogre i have not problem with that
for create this project i define class like that

class OgreWidget : public QWidget
{
    Q_OBJECT
 
public:
    OgreWidget(QWidget *parent = 0);
    ~OgreWidget();
.
.
.

class OgreWidget : public QWidget
{
    Q_OBJECT
    
public:
    OgreWidget(QWidget *parent = 0);
    ~OgreWidget();
.
.
.

To copy to clipboard, switch view to plain text mode 

and all my functions are in this class
for exemple

void OgreWidget::createScene()
void OgreWidget::setupNLoadResources()
void OgreWidget::paintEvent(QPaintEvent *e)
.
.
.

void OgreWidget::createScene()
void OgreWidget::setupNLoadResources()
void OgreWidget::paintEvent(QPaintEvent *e)
.
.
.

To copy to clipboard, switch view to plain text mode 

i change now my gui (interface) it's based now qmainwindows and the widget where i want create my scene there it's part of this class qmainwindows
i have now this

class MyInterface : public /*QWidget*/QMainWindow
{
	Q_OBJECT
 
public:
	QWidget *centralwidget;
. QMdiArea *mdiArea;
.
.

class MyInterface : public /*QWidget*/QMainWindow
{
	Q_OBJECT

public:
	QWidget *centralwidget;
. QMdiArea *mdiArea;
.
.

To copy to clipboard, switch view to plain text mode 

my interface mow is like that
inter.jpg
i want see my scene in the ceb$ntral widget "sous fenêtre" who it is on the mdiArea

is i must create another class ? how i do that ?