echopoint.tree
Interface TreeWillExpandListener

All Superinterfaces:

java.util.EventListener

public interface TreeWillExpandListener

extends java.util.EventListener

The listener that's notified when a tree is about to expand or collapse a node. The listener has a chance therefore to throw an ExpandVetoException to prevent the operation.

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

treeWillCollapse

public void treeWillCollapse(TreeExpansionEvent event)
                      throws ExpandVetoException

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

Throws:

ExpandVetoException

treeWillExpand

public void treeWillExpand(TreeExpansionEvent event)
                    throws ExpandVetoException

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

Throws:

ExpandVetoException