Java JTree Collapse collapseAll(JTree tree)

Description

collapse All

License

Open Source License

Parameter

Parameter	Description
tree	a parameter

Declaration

public static void collapseAll(JTree tree) 

Method Source Code

//package com.java2s;
/*//from   w  w w.jav  a2 s .c o  m
 * Copyright (c) 2004-2013 Universidade do Porto - Faculdade de Engenharia
 * Laborat?rio de Sistemas e Tecnologia Subaqu?tica (LSTS)
 * All rights reserved.
 * Rua Dr. Roberto Frias s/n, sala I203, 4200-465 Porto, Portugal
 *
 * This file is part of Neptus, Command and Control Framework.
 *
 * Commercial Licence Usage
 * Licencees holding valid commercial Neptus licences may use this file
 * in accordance with the commercial licence agreement provided with the
 * Software or, alternatively, in accordance with the terms contained in a
 * written agreement between you and Universidade do Porto. For licensing
 * terms, conditions, and further information contact lsts@fe.up.pt.
 *
 * European Union Public Licence - EUPL v.1.1 Usage
 * Alternatively, this file may be used under the terms of the EUPL,
 * Version 1.1 only (the "Licence"), appearing in the file LICENCE.md
 * included in the packaging of this file. You may not use this work
 * except in compliance with the Licence. Unless required by applicable
 * law or agreed to in writing, software distributed under the Licence is
 * distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF
 * ANY KIND, either express or implied. See the Licence for the specific
 * language governing permissions and limitations at
 * https://www.lsts.pt/neptus/licence.
 *
 * For more information please see <http://lsts.fe.up.pt/neptus>.
 *
 * Author: Paulo Dias
 * 22/Mar/2005
 */

import java.util.Enumeration;
import javax.swing.JTree;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;

public class Main {
    /**
     * @param tree
     */
    public static void collapseAll(JTree tree) {
        expandAll(tree, false);
    }

    /**
     * If expand is true, expands all nodes in the tree.
     * Otherwise, collapses all nodes in the tree.
     * @param tree
     * @param expand
     */
    private static void expandAll(JTree tree, boolean expand) {
        TreeNode root = (TreeNode) tree.getModel().getRoot();

        // Traverse tree from root
        expandAll(tree, new TreePath(root), expand);
    }

    /**
     * @param tree
     */
    public static void expandAll(JTree tree) {
        expandAll(tree, true);
    }

    /**
     * @param tree
     * @param parent
     * @param expand
     */
    private static void expandAll(JTree tree, TreePath parent, boolean expand) {
        // Traverse children
        TreeNode node = (TreeNode) parent.getLastPathComponent();
        if (node.getChildCount() >= 0) {
            for (Enumeration<?> e = node.children(); e.hasMoreElements();) {
                TreeNode n = (TreeNode) e.nextElement();
                TreePath path = parent.pathByAddingChild(n);
                expandAll(tree, path, expand);
            }
        }

        // Expansion or collapse must be done bottom-up
        if (expand) {
            tree.expandPath(parent);
        } else {
            tree.collapsePath(parent);
        }
    }
}

Related

1. collapseAllNodes(JTree tree)
2. collapseAllRows(JTree tree)
3. collapseTree(JTree tree)
4. collapseTree(JTree tree)