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javax.swing.event
public interface: TreeWillExpandListener [javadoc | source]

All Implemented Interfaces:
    java$util$EventListener

All Known Implementing Classes:
    TreeExpandListener

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 from javax.swing.event.TreeWillExpandListener Summary:
treeWillCollapse,   treeWillExpand
Method from javax.swing.event.TreeWillExpandListener Detail:
 public  void treeWillCollapse(TreeExpansionEvent event) throws ExpandVetoException
    Invoked whenever a node in the tree is about to be collapsed.
 public  void treeWillExpand(TreeExpansionEvent event) throws ExpandVetoException
    Invoked whenever a node in the tree is about to be expanded.