/a>
      </h4>
<a name="adaption_of_qpolygon_iterator_source_code"></a><pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">I</span><span class="special">,</span> <span class="comment">// Line iterator type</span>
          <span class="keyword">class</span> <span class="identifier">R</span>  <span class="comment">// Point reference type</span>
         <span class="special">&gt;</span>
<span class="ke