| Events and Listeners | ||
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Interface HierarchyListener
notifies
interested parties of changes in a grouped graph.
The information is conveyed using objects of type
HierarchyEvent, and covers
changes that relate to hierarchy level modifications of graph elements.
To receive notifications, HierarchyListener implementations have to be properly registered with a HierarchyManager object. Figure 7.7, “Context for using HierarchyListener” gives an overview on interface HierarchyListener's role.
Class DefaultNodeChangePropagator
can additionally be registered with the root graph of a grouped graph to notify
interested parties of node label changes
and changes of the realizer delegate of a group node/folder node.
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