Important data available in the entire application | QSharedPointer usage ?

[kornicameister]

Hi again
I hit the problem with making one class' object available in the entire application.
The object is created every time I try to establish a new connection with db, and after success it is sent to the core class (core - one which controls main UI). By that I have an access to the connection data which I want to have usable many times in different ways.

So I send a pointer to an object(the object itself is created in the UI which is destroyed right after connection being established) and from that moment I have connection data available from the core-level of my application.

Hope that is explained as simple as possible.
Now, I tried to solve this using QSharedPointer, but I think I did not catch an idea which comes with this class.
But before I ask you to help with making this understandable to me, I would like to ask whether there is claver and simpler solution for that.
The class which contains data looks like below

class ConnectionData : public QObject
{
    Q_OBJECT
public:
    explicit ConnectionData(QObject *parent = 0);
 
    void set(QString u,QString p,QString h,QString c,short int port);
    QString getUser() const;
    QString getPass() const;
    QString getHost() const;
    QString getConnectionName() const;
    short int  getPort() const;
 
private:
    QString user,
            pass,
            host,
            connectionName;
    short int port;
};

class ConnectionData : public QObject
{
    Q_OBJECT
public:
    explicit ConnectionData(QObject *parent = 0);

    void set(QString u,QString p,QString h,QString c,short int port);
    QString getUser() const;
    QString getPass() const;
    QString getHost() const;
    QString getConnectionName() const;
    short int  getPort() const;

private:
    QString user,
            pass,
            host,
            connectionName;
    short int port;
};

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so it's not so big, maybe passing by value ?