title: Implement paintSection for QHeaderView delivered class
body: <pre><code>protected:
    virtual void paintSection(QPainter *painter, const QRect &amp;rect, int logicalIndex) const
    {
      QHeaderView::paintSection(painter, rect, logicalIndex);
      painter-&gt;drawRect(2, 2, 10, 10);
    }
  </code></pre>
  
  <p>Rectangle is not painting. But when paintSection removed it is painting. I need to draw rectangle after call base paintSection.</p>