20 signals:

    20 signals:

    21     void pathChanged();

    21     void pathChanged();

    22 

    22 

    23 public slots:

    23 public slots:

    24     void undo();

    24     void undo();

    25     void simplifyLast();

    26     void simplifyLast();

    26 

    27 

    27 private:

    28 private:

    28     QPen m_pen;

    29     QPen m_pen;

    29     QBrush m_brush;

    30     QBrush m_brush;