Here you can find the source of expandPathsAfterChange(JTree tree, Hashtable state, DefaultMutableTreeNode root)
| Parameter | Description |
|---|---|
| tree | The tree |
| state | The state. From initializeExpandedPathsBeforeChange |
| root | The tree root |
public static void expandPathsAfterChange(JTree tree, Hashtable state, DefaultMutableTreeNode root)
//package com.java2s; /*// w w w . ja v a 2 s.c o m * Copyright 1997-2016 Unidata Program Center/University Corporation for * Atmospheric Research, P.O. Box 3000, Boulder, CO 80307, * support@unidata.ucar.edu. * * This library is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2.1 of the License, or (at * your option) any later version. * * This library is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser * General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this library; if not, write to the Free Software Foundation, * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ import java.util.Hashtable; import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.TreePath; public class Main { /** * Call this after the structure of a JTree changes to re-expand the paths. * * @param tree The tree * @param state The state. From initializeExpandedPathsBeforeChange * @param root The tree root */ public static void expandPathsAfterChange(JTree tree, Hashtable state, DefaultMutableTreeNode root) { TreePath path = new TreePath(root.getPath()); if (state.get(path.toString()) != null) { tree.expandPath(path); } for (int i = 0; i < root.getChildCount(); i++) { expandPathsAfterChange(tree, state, (DefaultMutableTreeNode) root.getChildAt(i)); } } }