SampleTreeModel


1   /*
2    * @(#)SampleTreeModel.java 1.13 05/11/17
3    * 
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7    * modification, are permitted provided that the following conditions are met:
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13   *  this list of conditions and the following disclaimer in the documentation
14   *  and/or other materials provided with the distribution.
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35   */
36  
37  /*
38   * @(#)SampleTreeModel.java 1.13 05/11/17
39   */
40  
41  import javax.swing.tree.DefaultTreeModel  ;
42  import javax.swing.tree.TreeNode  ;
43  import javax.swing.tree.TreePath  ;
44  import javax.swing.tree.DefaultMutableTreeNode  ;
45  import java.awt.Color  ;
46  
47  /**
48    * SampleTreeModel extends JTreeModel to extends valueForPathChanged.
49    * This method is called as a result of the user editing a value in
50    * the tree.  If you allow editing in your tree, are using TreeNodes
51    * and the user object of the TreeNodes is not a String, then you're going
52    * to have to subclass JTreeModel as this example does.
53    *
54    * @version 1.13 11/17/05
55    * @author Scott Violet
56    */
57  
58  public class SampleTreeModel extends DefaultTreeModel  
59  {
60      /**
61        * Creates a new instance of SampleTreeModel with newRoot set
62        * to the root of this model.
63        */
64      public SampleTreeModel(TreeNode   newRoot) {
65      super(newRoot);
66      }
67  
68      /**
69        * Subclassed to message setString() to the changed path item.
70        */
71      public void valueForPathChanged(TreePath   path, Object   newValue) {
72      /* Update the user object. */
73      DefaultMutableTreeNode        aNode = (DefaultMutableTreeNode  )path.getLastPathComponent();
74      SampleData    sampleData = (SampleData)aNode.getUserObject();
75  
76      sampleData.setString((String  )newValue);
77      /* UUUhhhhh, pretty colors. */
78      sampleData.setColor(Color.green);
79  
80      /* Since we've changed how the data is to be displayed, message
81         nodeChanged. */
82      nodeChanged(aNode);
83      }
84  }
85
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