Java JTree enableAutoExpansion(final JTree tree)

Description

Adds a TreeModelListener that will automatically expand the tree as new nodes are inserted.

License

Open Source License

Parameter

Parameter	Description
tree	The <code>JTree</code>.

Declaration

public static void enableAutoExpansion(final JTree tree) 

Method Source Code

//package com.java2s;
/*/*from   ww  w  .  jav a 2s  .c  om*/
 * Copyright (c) 2008 Bradley W. Kimmel
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

import javax.swing.JTree;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;

public class Main {
    /**
     * Adds a <code>TreeModelListener</code> that will automatically expand
     * the tree as new nodes are inserted.
     * @param tree The <code>JTree</code>.
     */
    public static void enableAutoExpansion(final JTree tree) {

        tree.getModel().addTreeModelListener(new TreeModelListener() {

            public void treeNodesChanged(TreeModelEvent e) {
                // nothing to do
            }

            public void treeNodesInserted(TreeModelEvent e) {
                tree.expandPath(e.getTreePath());
            }

            public void treeNodesRemoved(TreeModelEvent e) {
                // nothing to do
            }

            public void treeStructureChanged(TreeModelEvent e) {
                // nothing to do
            }

        });

    }
}

Related

1. autoscroll(JTree tree, Point cursorLocation)
2. autoScrollIsDesirable(JTree tree)
3. clearTreeIcon(JTree tree)
4. correctRowHeight(JTree tree)
5. disposeExpressionsTree()
6. findByName(JTree tree, String[] names)
7. findTree(Container container)
8. getCurrentWidth(JTree tree, int row)
9. getExpansionState(JTree tree, int row)