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Java > Open Source Codes > TreeDemo


1 /*
2  * @(#)TreeDemo.java 1.13 05/11/17
3  *
4  * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are met:
8  *
9  * -Redistribution of source code must retain the above copyright notice, this
10  * list of conditions and the following disclaimer.
11  *
12  * -Redistribution in binary form must reproduce the above copyright notice,
13  * this list of conditions and the following disclaimer in the documentation
14  * and/or other materials provided with the distribution.
15  *
16  * Neither the name of Sun Microsystems, Inc. or the names of contributors may
17  * be used to endorse or promote products derived from this software without
18  * specific prior written permission.
19  *
20  * This software is provided "AS IS," without a warranty of any kind. ALL
21  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
22  * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
23  * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
24  * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
25  * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
26  * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
27  * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
28  * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
29  * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
30  * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
31  *
32  * You acknowledge that this software is not designed, licensed or intended
33  * for use in the design, construction, operation or maintenance of any
34  * nuclear facility.
35  */
36
37 /*
38  * @(#)TreeDemo.java 1.13 05/11/17
39  */
40
41
42 import javax.swing.*;
43 import javax.swing.event.*;
44 import javax.swing.tree.*;
45 import javax.accessibility.*;
46
47 import java.awt.*;
48 import java.awt.event.*;
49 import java.beans.*;
50 import java.util.*;
51 import java.io.*;
52 import java.applet.*;
53 import java.net.*;
54
55 /**
56  * JTree Demo
57  *
58  * @version 1.13 11/17/05
59  * @author Jeff Dinkins
60  */
61 public class TreeDemo extends DemoModule {
62
63     JTree tree;
64
65     /**
66      * main method allows us to run as a standalone demo.
67      */
68     public static void main(String JavaDoc[] args) {
69     TreeDemo demo = new TreeDemo(null);
70     demo.mainImpl();
71     }
72
73     /**
74      * TreeDemo Constructor
75      */
76     public TreeDemo(SwingSet2 swingset) {
77     // Set the title for this demo, and an icon used to represent this
78 // demo inside the SwingSet2 app.
79 super(swingset, "TreeDemo", "toolbar/JTree.gif");
80
81     getDemoPanel().add(createTree(), BorderLayout.CENTER);
82     }
83  
84     public JScrollPane createTree() {
85         DefaultMutableTreeNode top = new DefaultMutableTreeNode(getString("TreeDemo.music"));
86         DefaultMutableTreeNode catagory = null ;
87     DefaultMutableTreeNode artist = null;
88     DefaultMutableTreeNode record = null;
89
90     // open tree data
91 URL url = getClass().getResource("/resources/tree.txt");
92
93     try {
94         // convert url to buffered string
95 InputStream is = url.openStream();
96         InputStreamReader isr = new InputStreamReader(is, "UTF-8");
97         BufferedReader reader = new BufferedReader(isr);
98
99         // read one line at a time, put into tree
100 String JavaDoc line = reader.readLine();
101         while(line != null) {
102         // System.out.println("reading in: ->" + line + "<-");
103 char linetype = line.charAt(0);
104         switch(linetype) {
105            case 'C':
106              catagory = new DefaultMutableTreeNode(line.substring(2));
107              top.add(catagory);
108              break;
109            case 'A':
110              if(catagory != null) {
111                  catagory.add(artist = new DefaultMutableTreeNode(line.substring(2)));
112              }
113              break;
114            case 'R':
115              if(artist != null) {
116                  artist.add(record = new DefaultMutableTreeNode(line.substring(2)));
117              }
118              break;
119            case 'S':
120              if(record != null) {
121                  record.add(new DefaultMutableTreeNode(line.substring(2)));
122              }
123              break;
124            default:
125              break;
126         }
127         line = reader.readLine();
128         }
129     } catch (IOException e) {
130     }
131
132     tree = new JTree(top) {
133         public Insets getInsets() {
134         return new Insets(5,5,5,5);
135         }
136     };
137         
138         tree.setEditable(true);
139             
140     return new JScrollPane(tree);
141     }
142     
143     void updateDragEnabled(boolean dragEnabled) {
144         tree.setDragEnabled(dragEnabled);
145     }
146
147 }
148
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