add a textedit widget to a graphics view scene

[sachinrd]

Hello,
I am a newbie to qt. I was trying to add a text edit widget to a scene such that it occupies the entire viewport of the graphicsview(just want to give user some space to add some text). I am stuck here and also a bit confused in coordinate conversions. below is a sample code. Thanks for any help in advance.

    QGraphicsScene *scene=new QGraphicsScene();
    ui->graphicsView->setScene(scene);
    ui->graphicsView->setAlignment(Qt::AlignTop | Qt::AlignLeft);

    QTextEdit *notes=new QTextEdit(this);
    notes->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    notes->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    notes->setPlaceholderText("Notes");
    notes->setStyleSheet("QTextEdit{ border: 2px solid black;}");
//    notes->setGeometry(0,20,800,500);
    QGraphicsProxyWidget *proxy = scene->addWidget(notes);