40     private:

    40     private:

    41         QPushButton * pbUndo;

    41         QPushButton * pbUndo;

    42         QPushButton * pbClear;

    42         QPushButton * pbClear;

    43         QPushButton * pbLoad;

    43         QPushButton * pbLoad;

    44         QPushButton * pbSave;

    44         QPushButton * pbSave;

    45         QCheckBox * cbEraser;

    46         QCheckBox * cbEraser;

    46         QRadioButton * rbPolyline;

    47         QRadioButton * rbPolyline;

    47         QRadioButton * rbRectangle;

    48         QRadioButton * rbRectangle;

    48         QRadioButton * rbEllipse;

    49         QRadioButton * rbEllipse;

    49 

    50