TreeWillExpandListener (Java 2 Platform SE v1.4.2) - Java 2 SDK v1.4.2, Java 2 SDK 英文文档

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Java^TM 2 Platform
Std. Ed. v1.4.2

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javax.swing.event
Interface TreeWillExpandListener

All Superinterfaces:: EventListener

public interface TreeWillExpandListener
extends EventListener

The listener that's notified when a tree expands or collapses a node. For further information and examples see How to Write a Tree-Will-Expand Listener, a section in The Java Tutorial.

Method Summary

void treeWillCollapse(TreeExpansionEvent event)
Invoked whenever a node in the tree is about to be collapsed.

void treeWillExpand(TreeExpansionEvent event)
Invoked whenever a node in the tree is about to be expanded.

Method Detail

treeWillExpand

public void treeWillExpand(TreeExpansionEvent event)
                    throws ExpandVetoException

Invoked whenever a node in the tree is about to be expanded.

Throws:: ExpandVetoException

treeWillCollapse

public void treeWillCollapse(TreeExpansionEvent event)
                      throws ExpandVetoException

Invoked whenever a node in the tree is about to be collapsed.

Throws:: ExpandVetoException