- 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
All Methods Instance Methods Abstract Methods Modifier and Type Method Description voidtreeWillCollapse(TreeExpansionEvent event)Invoked whenever a node in the tree is about to be collapsed.voidtreeWillExpand(TreeExpansionEvent event)Invoked whenever a node in the tree is about to be expanded.
Method Detail
treeWillExpand
void treeWillExpand(TreeExpansionEvent event) throws ExpandVetoException
Invoked whenever a node in the tree is about to be expanded.- Parameters:
event- aTreeExpansionEventcontaining aTreePathobject for the node- Throws:
ExpandVetoException- to signify expansion has been canceled
treeWillCollapse
void treeWillCollapse(TreeExpansionEvent event) throws ExpandVetoException
Invoked whenever a node in the tree is about to be collapsed.- Parameters:
event- aTreeExpansionEventcontaining aTreePathobject for the node- Throws:
ExpandVetoException- to signify collapse has been canceled