implements TreeSelectionListener to create your own listener : Tree « Swing JFC « Java






implements TreeSelectionListener to create your own listener

implements TreeSelectionListener  to create your own listener
    
/*
Swing, Second Edition
by Matthew Robinson, Pavel Vorobiev

*/

import java.awt.*;
import java.awt.event.*;
import java.util.*;

import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.event.*;

public class Tree1 
  extends JFrame 
{

  protected JTree  m_tree = null;
  protected DefaultTreeModel m_model = null;
  protected JTextField m_display;

  public Tree1()
  {
    super("Sample Tree [OID]");
    setSize(400, 300);

        Object[] nodes = new Object[5];
    DefaultMutableTreeNode top = new DefaultMutableTreeNode(
      new OidNode(1, "ISO"));
    DefaultMutableTreeNode parent = top;
    nodes[0] = top;

    DefaultMutableTreeNode node = new DefaultMutableTreeNode(
      new OidNode(0, "standard"));
    parent.add(node);
    node = new DefaultMutableTreeNode(new OidNode(2, 
      "member-body"));
    parent.add(node);
    node = new DefaultMutableTreeNode(new OidNode(3, "org"));
    parent.add(node);
    parent = node;
    nodes[1] = parent;

    node = new DefaultMutableTreeNode(new OidNode(6, "dod"));
    parent.add(node);
    parent = node;
    nodes[2] = parent;

    node = new DefaultMutableTreeNode(new OidNode(1, 
      "internet"));
    parent.add(node);
    parent = node;
    nodes[3] = parent;

    node = new DefaultMutableTreeNode(new OidNode(1, 
      "directory"));
    parent.add(node);
    node = new DefaultMutableTreeNode(new OidNode(2, 
      "mgmt"));
    parent.add(node);
    nodes[4] = node;
    node.add(new DefaultMutableTreeNode(new OidNode(1, 
      "mib-2")));
    node = new DefaultMutableTreeNode(new OidNode(3, 
      "experimental"));
    parent.add(node);
    node = new DefaultMutableTreeNode(new OidNode(4, 
      "private"));
    node.add(new DefaultMutableTreeNode(new OidNode(1, 
      "enterprises")));
    parent.add(node);
    node = new DefaultMutableTreeNode(new OidNode(5, 
      "security"));
    parent.add(node);
    node = new DefaultMutableTreeNode(new OidNode(6, 
      "snmpV2"));
    parent.add(node);
    node = new DefaultMutableTreeNode(new OidNode(7, 
      "mail"));
    parent.add(node);

    m_model = new DefaultTreeModel(top);
    m_tree = new JTree(m_model);

    DefaultTreeCellRenderer renderer = new 
      DefaultTreeCellRenderer();
    renderer.setOpenIcon(new ImageIcon("opened.gif"));
    renderer.setClosedIcon(new ImageIcon("closed.gif"));
    renderer.setLeafIcon(new ImageIcon("leaf.gif"));
    m_tree.setCellRenderer(renderer);

    m_tree.setShowsRootHandles(true); 
    m_tree.setEditable(false);
    TreePath path = new TreePath(nodes);
    m_tree.setSelectionPath(path);

    m_tree.addTreeSelectionListener(new 
      OidSelectionListener());

    JScrollPane s = new JScrollPane();
    s.getViewport().add(m_tree);
    getContentPane().add(s, BorderLayout.CENTER);

    m_display = new JTextField();
    m_display.setEditable(false);
    getContentPane().add(m_display, BorderLayout.SOUTH);

    WindowListener wndCloser = new WindowAdapter()
    {
      public void windowClosing(WindowEvent e) 
      {
        System.exit(0);
      }
    };
    addWindowListener(wndCloser);
    
    setVisible(true);
  }

  public static void main(String argv[]) 
  {
    new Tree1();
  }

  class OidSelectionListener 
    implements TreeSelectionListener 
  {
    public void valueChanged(TreeSelectionEvent e)
    {
      TreePath path = e.getPath();
      Object[] nodes = path.getPath();
      String oid = "";
      for (int k=0; k<nodes.length; k++)
      {
        DefaultMutableTreeNode node = 
          (DefaultMutableTreeNode)nodes[k];
        OidNode nd = (OidNode)node.getUserObject();
        oid += "."+nd.getId();
      }
      m_display.setText(oid);
    }
  }
}

class OidNode
{
  protected int    m_id;
  protected String m_name;

  public OidNode(int id, String name)
  {
    m_id = id;
    m_name = name;
  }

  public int getId() 
  { 
    return m_id;
  }

  public String getName() 
  { 
    return m_name;
  }

  public String toString() 
  { 
    return m_name;
  }
}



           
         
    
    
    
  








Related examples in the same category

1.Build a tree based on DefaultMutableTreeNodeBuild a tree based on DefaultMutableTreeNode
2.Add Tree to JScrollPaneAdd Tree to JScrollPane
3.Genealogy TreeGenealogy Tree
4.Tree LinesTree Lines
5.DefaultMutableTreeNode Node Tree SampleDefaultMutableTreeNode Node Tree Sample
6.Display a file system in a JTree viewDisplay a file system in a JTree view
7.File folder Tree with iconsFile folder Tree with icons
8.File Tree with Popup MenuFile Tree with Popup Menu
9.File Tree with TooltipsFile Tree with Tooltips
10.Ancestor Tree with IconsAncestor Tree with Icons
11.Tree Icon DemoTree Icon Demo
12.DefaultMutableTreeNode and user objectDefaultMutableTreeNode and user object
13.Display user object in a treeDisplay user object in a tree
14.Tree Expand Event DemoTree Expand Event Demo
15.Tree: Drag and DropTree: Drag and Drop
16.Tree open IconTree open Icon
17.Traverse TreeTraverse Tree
18.Tree based on Array structureTree based on Array structure
19.Tree will Expand event and listenerTree will Expand event and listener
20.Set the Tree LineSet the Tree Line
21.Tree Selection RowTree Selection Row
22.JTree.DynamicUtilTreeNode.createChildrenJTree.DynamicUtilTreeNode.createChildren
23.Install ToolTips for Tree (JTree)Install ToolTips for Tree (JTree)
24.Tree Expand Event Demo 2Tree Expand Event Demo 2
25.A tree with componentA tree with component
26.A sample component for dragging and dropping a collection of files into a tree.A sample component for dragging and dropping a collection of files into a tree.
27.DnD (drag and drop)JTree code DnD (drag and drop)JTree code
28.Build a tree and populate it from hashtablesBuild a tree and populate it from hashtables
29.A simple test to see how we can build a tree and populate itA simple test to see how we can build a tree and populate it
30.Installs custom iconsInstalls custom icons
31.Build a tree and customize its iconsBuild a tree and customize its icons
32.Displaying Hierarchical Data within a JTreeDisplaying Hierarchical Data within a JTree
33.Add and remove tree Node and expand the tree node
34.File System Tree
35.TreeExpansionListener and TreeExpansionEventTreeExpansionListener and TreeExpansionEvent
36.Enabling and Disabling Multiple Selections in a JTree Component
37.Allow only a single node to be selected (default)
38.Allow selection to span one vertical contiguous set of visible nodes
39.Allow multiple selections of visible nodes
40.Setting the Row Height of a JTree
41.All rows will be given 15 pixels of height
42.Have the row height for each row computed individually
43.Flush the internal cache of Row height
44.Preventing Expansion or Collapse of a Node in a JTree: override JTree.setExpandedState()
45.Removing a Node to a JTree Component
46.JTree root cannot be removed with removeNodeFromParent(), use DefaultTreeModel.setRoot() to remove the root
47.Listening for Expansion and Collapse Events in a JTree Component
48.Expansion and Collapse Events in a JTree are fired before a node is expanded or collapsed can be vetoed, thereby preventing the operation.
49.Creating a JTree Component
50.Changing and Removing the Default Icons in a JTree Component
51.Use UIManager to change the default icon for JTree
52.Getting the Selected Nodes in a JTree Component
53.Visiting All the Nodes in a JTree Component
54.Traverse all expanded nodes in tree
55.Finding a Node in a JTree Component
56.Search backward from last visible row looking for any visible node whose name starts with prefix.
57.Find the path regardless of visibility that matches the specified sequence of names
58.Adding a Node to a JTree Component
59.Returns a TreePath containing the specified node.
60.Converting All Nodes in a JTree Component to a TreePath Array
61.Get path for all expanded or not expanded tree pathes
62.Expanding or Collapsing All Nodes in a JTree Component
63.Preventing the Expansion or Collapse of a Node in a JTree Component
64.Listening for Selection Events in a JTree Component
65.Have a popup attached to a JTree
66.Deleting nodes from JTree
67.Adding editable nodes to JTree
68.Searching node in a JTree
69.Drag and drop of a group of files into a tree
70.JTree drag and drop utilites
71.Expand All for a tree path
72.Get tree path from TreeNode
73.JTree Utilities
74.Expand JTree