Copyright (C) 1992, Digital Equipment Corporation
All rights reserved.
See the file COPYRIGHT for a full description.
Last modified on Mon Feb 24 13:55:12 PST 1992 by muller
<*PRAGMA LL*>
A TranslateVBT.T is a filter that maintains a translation between
the coordinate systems of the child and parent such that the child's
coordinate system has its origin at the northwest corner of the
child domain. The child can be NIL, in which case the TranslateVBT
ignores all events.
INTERFACE TranslateVBT;
IMPORT VBT, Filter;
TYPE T <: Filter.T;
The call v.init(ch) initializes v as a TranslateVBT with
child ch.
PROCEDURE New(ch: VBT.T): T; <* LL.sup <= VBT.mu *>
New(...) is equivalent to NEW(T).init(...).
END TranslateVBT.