Problem with MouseEvents

[pedrohs]

I have this in my Dialog header:

QGraphicsScene *scene;
void mousePressEvent(QMouseEvent *);
void mouseMoveEvent(QMouseEvent*);
void mouseReleaseEvent(QMouseEvent *);

QGraphicsScene *scene;
void mousePressEvent(QMouseEvent *);
void mouseMoveEvent(QMouseEvent*);
void mouseReleaseEvent(QMouseEvent *);

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And this in my cpp:

scene=new QGraphicsScene(0,0,800,600);
ui->graphicsView->setScene(scene);
QPixmap p2("C:/Users/Pedro/Desktop/imagens/6.jpg");
QGraphicsPixmapItem* item = new QGraphicsPixmapItem(p2);
scene->addItem(item);

scene=new QGraphicsScene(0,0,800,600);
ui->graphicsView->setScene(scene);
QPixmap p2("C:/Users/Pedro/Desktop/imagens/6.jpg");
QGraphicsPixmapItem* item = new QGraphicsPixmapItem(p2);
scene->addItem(item);

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Is possible to open a new window or to do any action when the item is clicked? Sorry people, I'm begginer. Can you help me, please?

void Dialog::mousePressEvent(QMouseEvent * e) {
 
}

void Dialog::mousePressEvent(QMouseEvent * e) {
    
}

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