parbox <-find: code -> tupleRecursively traverse the parbox
object and parboxes displayed on them (possibly embedded in one or more
device layers), applying Considition to each hbox
object encountered using the following parameters:
On success, a tuple
object containing the parbox and index of the hbox are returned.
Typically, this method is used to locate anchors. Class hbox
is therefore subclassed and decorated with identifying information for
the anchor. parbox<-find
is then used to locate an instance with the desired property of the
anchor class.
See also parbox<-box_area.
