1   /*
2    * @(#)TreeDemo.java    1.10 04/07/26
3    * 
4    * Copyright (c) 2004 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, 
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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    1.10 04/07/26
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 1.10 07/26/04
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[] 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);
97          BufferedReader reader = new BufferedReader(isr);
98  
99          // read one line at a time, put into tree
100         String 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