Сигналы и Слоты

class ContextMenu : public QObject
{
    Q_OBJECT
public:
    explicit ContextMenu(QObject *parent = 0);
signals:
    void Registration_Graphics_Pixmap();
private slots:
    void slotNewElement_and();
};

public slots:
    void RegistrationGraphicsPixmap(eTypeObjects type);

GraphicsScene::GraphicsScene()
{
    Context_Menu = new ContextMenu(this);
    connect(Context_Menu, SIGNAL(Registration_Graphics_Pixmap()), this, SLOT(RegistrationGraphicsPixmap()));
}

void ContextMenu::slotNewElement_and()
{
    emit Registration_Graphics_Pixmap();
}

connect(Context_Menu, &ContextMenu::Registration_Graphics_Pixmap, this, &GraphicsScene::RegistrationGraphicsPixmap);

class ComboBox : public QComboBox
{
public:
    ComboBox();
signals:
    void Delete_Box(void *);

class GraphicsScene : public QGraphicsScene {
public:
    GraphicsScene();
public slots:
    void DeleteGraphicsObject(void *addres);

SCB->BoxDataBase = new ComboBox;
connect(SCB->BoxDataBase, &ComboBox::Delete_Box, this, &GraphicsScene::DeleteGraphicsObject);

SCB->BoxDataBase = new ComboBox;
connect(SCB->BoxDataBase, SIGNAL(Delete_Box(void*)), this, SLOT(DeleteGraphicsObject(void*)));

class ComboBox : public QComboBox
{
Q_OBJECT 
public:
    ComboBox();
signals:
    void Delete_Box(void *);

class GraphicsScene : public QGraphicsScene {
Q_OBJECT 
public:
    GraphicsScene();
public slots:
    void DeleteGraphicsObject(void *addres);