01: /* uDig - User Friendly Desktop Internet GIS client
02: * http://udig.refractions.net
03: * (C) 2004, Refractions Research Inc.
04: *
05: * This library is free software; you can redistribute it and/or
06: * modify it under the terms of the GNU Lesser General Public
07: * License as published by the Free Software Foundation;
08: * version 2.1 of the License.
09: *
10: * This library is distributed in the hope that it will be useful,
11: * but WITHOUT ANY WARRANTY; without even the implied warranty of
12: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13: * Lesser General Public License for more details.
14: */
15: package net.refractions.udig.project;
16:
17: /**
18: * Listener for listening to a {@link net.refractions.udig.project.IBlackboard} objects.
19: *
20: * @author jones
21: * @since 1.1.0
22: */
23: public interface IBlackboardListener {
24: /**
25: * Called after the blackboard has been changed. This will not be called if the blackboard
26: * is cleared.
27: *
28: * @param event The event containing the changed data.
29: */
30: void blackBoardChanged(BlackboardEvent event);
31:
32: /**
33: * Called before the blackboard has been cleared.
34: *
35: * @param source the blackboard that has been cleared.
36: */
37: void blackBoardCleared(IBlackboard source);
38: }
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