Module java.desktop

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
    Called whenever an item in the tree has been collapsed.
    void
    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