<area shape="rect" href="$class_qwt_abstract_slider.html" title="An abstract base class for slider widgets." alt="" coords="7,83,135,107">
<area shape="rect" href="$class_qwt_double_range.html" title="A class which controls a value within an interval." alt="" coords="8,8,133,32">
<area shape="rect" href="$class_qwt_abstract_scale.html" title="An abstract base class for classes containing a scale." alt="" coords="159,83,287,107">
