1   /*
2    * Copyright (c) 2002 Sun Microsystems, Inc. All  Rights Reserved.
3    * 
4    * Redistribution and use in source and binary forms, with or without
5    * modification, are permitted provided that the following conditions
6    * are met:
7    * 
8    * -Redistributions of source code must retain the above copyright
9    *  notice, this list of conditions and the following disclaimer.
10   * 
11   * -Redistribution in binary form must reproduct the above copyright
12   *  notice, this list of conditions and the following disclaimer in
13   *  the documentation and/or other materials provided with the distribution.
14   * 
15   * Neither the name of Sun Microsystems, Inc. or the names of contributors
16   * may be used to endorse or promote products derived from this software
17   * without specific prior written permission.
18   * 
19   * This software is provided "AS IS," without a warranty of any kind. ALL
20   * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
21   * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
22   * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT
23   * BE LIABLE FOR ANY DAMAGES OR LIABILITIES SUFFERED BY LICENSEE AS A RESULT
24   * OF OR RELATING TO USE, MODIFICATION OR DISTRIBUTION OF THE SOFTWARE OR ITS
25   * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
26   * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
27   * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
28   * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, EVEN
29   * IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
30   * 
31   * You acknowledge that Software is not designed, licensed or intended for
32   * use in the design, construction, operation or maintenance of any nuclear
33   * facility.
34   */
35  
36  /*
37   * @(#)TreeDemo.java    1.6 02/06/13
38   */
39  
40  
41  import javax.swing.*;
42  import javax.swing.event.*;
43  import javax.swing.tree.*;
44  import javax.accessibility.*;
45  
46  import java.awt.*;
47  import java.awt.event.*;
48  import java.beans.*;
49  import java.util.*;
50  import java.io.*;
51  import java.applet.*;
52  import java.net.*;
53  
54  /**
55   * JTree Demo
56   *
57   * @version 1.6 06/13/02
58   * @author Jeff Dinkins
59   */
60  public class TreeDemo extends DemoModule {
61  
62      /**
63       * main method allows us to run as a standalone demo.
64       */
65      public static void main(String[] args) {
66      TreeDemo demo = new TreeDemo(null);
67      demo.mainImpl();
68      }
69  
70      /**
71       * TreeDemo Constructor
72       */
73      public TreeDemo(SwingSet2 swingset) {
74      // Set the title for this demo, and an icon used to represent this
75      // demo inside the SwingSet2 app.
76      super(swingset, "TreeDemo", "toolbar/JTree.gif");
77  
78      getDemoPanel().add(createTree(), BorderLayout.CENTER);
79      }
80   
81      public JScrollPane createTree() {
82          DefaultMutableTreeNode top = new DefaultMutableTreeNode(getString("TreeDemo.music"));
83          DefaultMutableTreeNode catagory = null ;
84      DefaultMutableTreeNode artist = null;
85      DefaultMutableTreeNode record = null;
86  
87      // open tree data 
88      URL url = getClass().getResource("/resources/tree.txt");
89  
90      try {
91          // convert url to buffered string
92          InputStream is = url.openStream();
93          InputStreamReader isr = new InputStreamReader(is);
94          BufferedReader reader = new BufferedReader(isr);
95  
96          // read one line at a time, put into tree
97          String line = reader.readLine();
98          while(line != null) {
99          // System.out.println("reading in: ->" + line + "<-");
100         char linetype = line.charAt(0);
101         switch(linetype) {
102            case 'C':
103              catagory = new DefaultMutableTreeNode(line.substring(2));
104              top.add(catagory);
105              break;
106            case 'A':
107              if(catagory != null) {
108                  catagory.add(artist = new DefaultMutableTreeNode(line.substring(2)));
109              }
110              break;
111            case 'R':
112              if(artist != null) {
113                  artist.add(record = new DefaultMutableTreeNode(line.substring(2)));
114              }
115              break;
116            case 'S':
117              if(record != null) {
118                  record.add(new DefaultMutableTreeNode(line.substring(2)));
119              }
120              break;
121            default:
122              break;
123         }
124         line = reader.readLine();
125         }
126     } catch (IOException e) {
127     }
128 
129     JTree tree = new JTree(top) {
130         public Insets getInsets() {
131         return new Insets(5,5,5,5);
132         }
133     };
134     return new JScrollPane(tree);
135     }
136 
137 }
138