1 /*
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3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
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8  *   - Redistributions of source code must retain the above copyright
9  *     notice, this list of conditions and the following disclaimer.
10  *
11  *   - Redistributions in binary form must reproduce the above copyright
12  *     notice, this list of conditions and the following disclaimer in the
13  *     documentation and/or other materials provided with the distribution.
14  *
15  *   - Neither the name of Oracle nor the names of its
16  *     contributors may be used to endorse or promote products derived
17  *     from this software without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
20  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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27  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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30  */
31 
32 /*
33  * This source code is provided to illustrate the usage of a given feature
34  * or technique and has been deliberately simplified. Additional steps
35  * required for a production-quality application, such as security checks,
36  * input validation and proper error handling, might not be present in
37  * this sample code.
38  */
39 
40 
41 
42 import javax.swing.tree.DefaultTreeModel;
43 import javax.swing.tree.TreeNode;
44 import javax.swing.tree.TreePath;
45 import javax.swing.tree.DefaultMutableTreeNode;
46 import java.awt.Color;
47 
48 
49 /**
50  * SampleTreeModel extends JTreeModel to extends valueForPathChanged.
51  * This method is called as a result of the user editing a value in
52  * the tree.  If you allow editing in your tree, are using TreeNodes
53  * and the user object of the TreeNodes is not a String, then you're going
54  * to have to subclass JTreeModel as this example does.
55  *
56  * @author Scott Violet
57  */
58 @SuppressWarnings("serial")
59 public class SampleTreeModel extends DefaultTreeModel {
60 
61     /**
62      * Creates a new instance of SampleTreeModel with newRoot set
63      * to the root of this model.
64      */
SampleTreeModel(TreeNode newRoot)65     public SampleTreeModel(TreeNode newRoot) {
66         super(newRoot);
67     }
68 
69     /**
70      * Subclassed to message setString() to the changed path item.
71      */
72     @Override
valueForPathChanged(TreePath path, Object newValue)73     public void valueForPathChanged(TreePath path, Object newValue) {
74         /* Update the user object. */
75         DefaultMutableTreeNode aNode = (DefaultMutableTreeNode) path.
76                 getLastPathComponent();
77         SampleData sampleData = (SampleData) aNode.getUserObject();
78 
79         sampleData.setString((String) newValue);
80         /* UUUhhhhh, pretty colors. */
81         sampleData.setColor(Color.green);
82 
83         /* Since we've changed how the data is to be displayed, message
84         nodeChanged. */
85         nodeChanged(aNode);
86     }
87 }
88