=================================================================
Logtalk - Object oriented extension to Prolog
Release 2.28.2
Copyright (c) 1998-2006 Paulo Moura. All Rights Reserved.
To load this example and for sample queries, please see the SCRIPT file.
You will also need to load the following files in the library directory:
events_loader, types_loader, metapredicates_loader, and hierarchies_loader.
Alternatively, you may load the library all_loader file to load all library
entities.
This folder contains an example of representation and handling of
relations using events. We have instances of class brick and a binary
brick_stack relation between the bricks. Every time we move a brick, we
want the bricks on top of it to move along. If we break the stack by
moving a middle brick, we want to automatically destroy the
corresponding relation tuple.
It's instructive to use the event debugger in the Logtalk library (loader
file debugging_loader.lgt) to better understand this example. Set spy points
in all brick instances and then activate the debugger.
