Module java.desktop
Package javax.swing.event

Interface TreeExpansionListener

All Superinterfaces:
EventListener
All Known Implementing Classes:
BasicTreeUI.TreeExpansionHandler, JTree.AccessibleJTree
public interface TreeExpansionListener extends EventListener
The listener that's notified when a tree expands or collapses a node. For further documentation and examples see How to Write a Tree Expansion Listener, a section in The Java Tutorial.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    treeCollapsed​(TreeExpansionEvent event)
    Called whenever an item in the tree has been collapsed.
    void
    treeExpanded​(TreeExpansionEvent event)
    Called whenever an item in the tree has been expanded.

  • Method Details

    • treeExpanded

      void treeExpanded​(TreeExpansionEvent event)
      Called whenever an item in the tree has been expanded.
      Parameters:
      event - a TreeExpansionEvent containing a TreePath object for the expanded node

    • treeCollapsed

      void treeCollapsed​(TreeExpansionEvent event)
      Called whenever an item in the tree has been collapsed.
      Parameters:
      event - a TreeExpansionEvent containing a TreePath object for the collapsed node