class:TreeWillExpandListener [NONE]

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:treeWillExpand(javax.swing.event.TreeExpansionEvent) [NONE]

treeWillExpand

void treeWillExpand (TreeExpansionEvent event) throws ExpandVetoException

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

Parameters:: event - a TreeExpansionEvent containing a TreePath object for the node
Throws:: ExpandVetoException - to signify expansion has been canceled

method:treeWillCollapse(javax.swing.event.TreeExpansionEvent) [NONE]

treeWillCollapse

void treeWillCollapse (TreeExpansionEvent event) throws ExpandVetoException

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

Parameters:: event - a TreeExpansionEvent containing a TreePath object for the node
Throws:: ExpandVetoException - to signify collapse has been canceled