class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private slots:

private:
    Ui::MainWindow *ui;
    QString fileName_;

    QMap<QString, unsigned int> vars_; // this is the data I want to associate
};

class Ui_MainWindow
{
public:
    QWidget *centralWidget;
    QTextEdit *ALU;       // this is the control I want to associate with the data
.
.
.