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
Modifier and Type | Method | Description |
---|---|---|
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
void treeWillExpand(TreeExpansionEvent event) throws ExpandVetoException
Invoked whenever a node in the tree is about to be expanded.
- Parameters:
-
event
- aTreeExpansionEvent
containing aTreePath
object 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
- aTreeExpansionEvent
containing aTreePath
object for the node - Throws:
-
ExpandVetoException
- to signify collapse has been canceled