01: package prefuse.data.event;
02:
03: import java.util.EventListener;
04:
05: import prefuse.data.util.ColumnProjection;
06:
07: /**
08: * Listener interface for monitoring changes to the state of a
09: * column projection filter.
10: *
11: * @author <a href="http://jheer.org">jeffrey heer</a>
12: */
13: public interface ProjectionListener extends EventListener {
14:
15: /**
16: * Notification that the internal state of a projection has been updated.
17: * @param projection the source of the change notification
18: */
19: public void projectionChanged(ColumnProjection projection);
20:
21: } // end of interface ProjectionListener
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