An icon that displays the value of an attribute of the container,
updating it as the value of the value of the attribute is updated.
The attribute is assumed to be an instance of Settable, and its name
is given by the parameter <i>attributeName</i>. The width of the
display is fixed, and is given by the attribute <i>displayWidth</i>,
which is in "n" characters.
Edward A. Lee
$Id: UpdatedValueIcon.java 70398 2014-10-22 23:44:32Z cxh $
Ptolemy II 2.0
Yellow (eal)
Red (johnr)