public interface TreeExpansionListener extends EventListener
The listener that's notified when a tree expands or collapses a node. For further documentation and examples see How to Write a Tree Expansion Listener, a section in The Java Tutorial.
void treeExpanded(TreeExpansionEvent event)
Called whenever an item in the tree has been expanded.
void treeCollapsed(TreeExpansionEvent event)
Called whenever an item in the tree has been collapsed.
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