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Revision 4662, 1.3 KB
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| 1 | ================================================================ |
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| 2 | Logtalk - Open source object-oriented logic programming language |
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| 3 | Release 2.35.0 |
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| 4 | |
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| 5 | Copyright (c) 1998-2009 Paulo Moura. All Rights Reserved. |
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| 6 | Logtalk is free software. You can redistribute it and/or modify |
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| 7 | it under the terms of the "Artistic License 2.0" as published by |
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| 8 | The Perl Foundation. Consult the "LICENSE.txt" file for details. |
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| 9 | ================================================================ |
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| 10 | |
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| 11 | |
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| 12 | To load this example and for sample queries, please see the SCRIPT.txt file. |
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| 13 | |
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| 14 | You will also need to load the following files in the library directory: |
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| 15 | events_loader, types_loader, metapredicates_loader, and hierarchies_loader. |
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| 16 | Alternatively, you may load the library all_loader file to load all library |
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| 17 | entities. |
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| 18 | |
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| 19 | This folder contains an example of representation and handling of |
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| 20 | relations using events. We have instances of class brick and a binary |
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| 21 | brick_stack relation between the bricks. Every time we move a brick, we |
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| 22 | want the bricks on top of it to move along. If we break the stack by |
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| 23 | moving a middle brick, we want to automatically destroy the |
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| 24 | corresponding relation tuple. |
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| 25 | |
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| 26 | It's instructive to use the event debugger in the Logtalk library (loader |
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| 27 | file debugging_loader.lgt) to better understand this example. Set spy points |
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| 28 | in all brick instances and then activate the debugger. |
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