TreeDemo.java |
1 /* 2 * Copyright (c) 2003 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 1.7 03/01/23 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 1.7 01/23/03 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