javax.swing.event
Interface TreeWillExpandListener

public abstract interface TreeWillExpandListener

extends EventListener

The listener that's notified when a tree expands or collapses a node.

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.

treeWillCollapse

public void treeWillCollapse(TreeExpansionEvent event)
                      throws ExpandVetoException

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