A category tool tip generator is an object that can be assigned to a
CategoryItemRenderer and that
assumes responsibility for creating text items to be used as tooltips for the
items in a CategoryPlot .
To assist with cloning charts, classes that implement this interface should
also implement the org.jfree.util.PublicCloneable interface (in
JCommon).
To assist with cloning charts, classes that implement this interface should also implement the
org.jfree.util.PublicCloneableinterface (in JCommon).