Interface TreeWillExpandListener
- All Superinterfaces:
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.
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Method Summary
Modifier and TypeMethodDescriptionvoid
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.
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Method Details
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treeWillExpand
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
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treeWillCollapse
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
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