BasicTreeUI.TreeExpansionHandler

javax.swing.plaf.basic

Class BasicTreeUI.TreeExpansionHandler

java.lang.Object
- javax.swing.plaf.basic.BasicTreeUI.TreeExpansionHandler

All Implemented Interfaces:

EventListener, TreeExpansionListener

Enclosing class:

BasicTreeUI
```
public class BasicTreeUI.TreeExpansionHandler
extends Object
implements TreeExpansionListener
```
Updates the TreeState in response to nodes expanding/collapsing.

Constructor Summary

Constructors

Constructor and Description
`TreeExpansionHandler()`

Method Summary

All Methods

Instance Methods

Concrete Methods
Modifier and Type	Method and Description
`void`	`treeCollapsed(TreeExpansionEvent event)` Called whenever an item in the tree has been collapsed.
`void`	`treeExpanded(TreeExpansionEvent event)` Called whenever an item in the tree has been expanded.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - TreeExpansionHandler
```
public TreeExpansionHandler()
```
- Method Detail
  - treeExpanded
```
public void treeExpanded(TreeExpansionEvent event)
```
    Called whenever an item in the tree has been expanded.
  - treeCollapsed
```
public void treeCollapsed(TreeExpansionEvent event)
```
    Called whenever an item in the tree has been collapsed.