<map id="G" name="G"> <area shape="rect" id="node2" href="$class_qwt_abstract_slider.html" title="An abstract base class for slider widgets." alt="" coords="5,83,131,112"/> <area shape="rect" id="node4" href="$class_qwt_double_range.html" title="A class which controls a value within an interval." alt="" coords="7,5,129,35"/> </map>