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package javax.swing.event;

import java.util.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.
Author:Scott Violet
/** * The listener that's notified when a tree expands or collapses * a node. * For further documentation and examples see * <a href="http://java.sun.com/docs/books/tutorial/uiswing/events/treeexpansionlistener.html">How to Write a Tree Expansion Listener</a>, * a section in <em>The Java Tutorial.</em> * * @author Scott Violet */
public interface TreeExpansionListener extends EventListener {
Called whenever an item in the tree has been expanded.
/** * Called whenever an item in the tree has been expanded. */
public void treeExpanded(TreeExpansionEvent event);
Called whenever an item in the tree has been collapsed.
/** * Called whenever an item in the tree has been collapsed. */
public void treeCollapsed(TreeExpansionEvent event); }