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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="https://docs.oracle.com/javase/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.
Params:
event – a TreeExpansionEvent containing a TreePath object for the expanded node/**
     * Called whenever an item in the tree has been expanded.
     *
     * @param event a {@code TreeExpansionEvent} containing a {@code TreePath}
     *              object for the expanded node
     */
    public void treeExpanded(TreeExpansionEvent event);

    
Called whenever an item in the tree has been collapsed.
Params:
event – a TreeExpansionEvent containing a TreePath object for the collapsed node/**
     * Called whenever an item in the tree has been collapsed.
     *
     * @param event a {@code TreeExpansionEvent} containing a {@code TreePath}
     *              object for the collapsed node
     */
    public void treeCollapsed(TreeExpansionEvent event);
}