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//add Listener to Print to Screen the xml tag selected
xmlTree.addTreeSelectionListener(new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent evt) {
// Get all nodes whose selection status has changed
TreePath[] paths = evt.getPaths();
// Print the last Path Component selected
System.out.println(evt.getPath().getLastPathComponent());
DefaultTreeModel newModel = new DefaultTreeModel((TreeNode)evt.getPath().getLastPathComponent());
xmlTree.setModel(newModel);
//print the full path from the selected tag
// System.out.println(evt.getPath().toString());
}
}); Offline Hi,
Thanks for the reply. But by doing the above I will be able to modify the original tree that I have and will not be able to display the original tree that I have.
How can I display the subtree in another window or frame such that my original tree is preserved??
Please help me out in this.....
Thanks!!!
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Sorry......the code given above could not display properly. So I am resending the code back in proper form.
import java.awt.*; import javax.swing.*; import javax.swing.tree.*; import javax.swing.event.*; import java.util.Iterator; import java.util.List; import org.jdom.*; import org.jdom.input.SAXBuilder; import java.io.File; import java.awt.event.*; public class XMLTreeViewer extends JFrame implements ActionListener{ //The JTree to display the XML private JTree xmlTree; private JTree resultTree; JButton showButton ; JButton primeButton; //The XML document to be output to the JTree private Document xmlDoc; DefaultMutableTreeNode tn,selectedNode; public XMLTreeViewer(Document doc) { super("WebOQL Homework"); this.xmlDoc = doc; //document setSize(600, 450); tn = new DefaultMutableTreeNode("Hyper Tree"); initialize(); } private void initialize() { xmlTree = new JTree(); xmlTree.setName("HyperTree"); getContentPane().add(new JScrollPane(xmlTree), BorderLayout.LINE_START); getContentPane().add(tabbedPane(),BorderLayout.LINE_END); processElement(xmlDoc.getRootElement(), tn); //create a tree ( (DefaultTreeModel) xmlTree.getModel()).setRoot(tn); addWindowListener(new java.awt.event.WindowAdapter() { public void windowClosing(java.awt.event.WindowEvent e) { //release all the resource xmlTree = null; tn = null; } }); setVisible(true); //add Listener to Print to Screen the xml tag selected xmlTree.addTreeSelectionListener(new TreeSelectionListener() { public void valueChanged(TreeSelectionEvent evt) { // Get all nodes whose selection status has changed TreePath[] paths = evt.getPaths(); // Print the last Path Component selected System.out.println("Path = " + evt.getPath().getLastPathComponent()); selectedNode = (DefaultMutableTreeNode) xmlTree.getLastSelectedPathComponent(); } }); } //Get Tag and element content private void processElement(Element el, DefaultMutableTreeNode dmtn) { DefaultMutableTreeNode currentNode = new DefaultMutableTreeNode(el.getName()); String text = el.getTextNormalize(); if ( (text != null) && (!text.equals(""))) { currentNode.add(new DefaultMutableTreeNode(text)); } Iterator children = el.getChildren().iterator(); while (children.hasNext()) { processElement( (Element) children.next(), currentNode); } dmtn.add(currentNode); } private void processAttributes(Element el, DefaultMutableTreeNode dmtn) { Iterator atts = el.getAttributes().iterator(); while (atts.hasNext()) { Attribute att = (Attribute) atts.next(); DefaultMutableTreeNode attNode = new DefaultMutableTreeNode("@" + att.getName()); attNode.add(new DefaultMutableTreeNode(att.getValue())); dmtn.add(attNode); } } private JTabbedPane tabbedPane(){ JTabbedPane tp = new JTabbedPane (JTabbedPane.LEFT); tp.addTab("Operators", createPage1()); return tp; } private JPanel createPage1(){ JPanel pg = new JPanel(); Box top = new Box(BoxLayout.Y_AXIS); primeButton = new JButton("Prime(')"); primeButton.addActionListener(this); top.add(primeButton); pg.add(top); return pg; } public void actionPerformed(ActionEvent e){ DefaultMutableTreeNode tn1; /*** 1. Prime***/ if(e.getSource().equals(showButton)){ System.out.println("showButton is clicked."); tn1 = new DefaultMutableTreeNode("Result: Hyper Tree"); processPrime(xmlDoc.getRootElement(), tn1, 1); resultTree = new JTree(); ( (DefaultTreeModel) resultTree.getModel()).setRoot(tn1); getContentPane().add(new JScrollPane(resultTree), BorderLayout.CENTER); setVisible(true); } /*** 2. Prime from the tree ***/ else if(e.getSource().equals(primeButton)){ // none of this is needed any longer // System.out.println("primeButton is clicked."); // tn1 = new DefaultMutableTreeNode("Result: Hyper Tree"); // //DefaultMutableTreeNode cloneNode = (DefaultMutableTreeNode) selectedNode.clone(); // int childCount = selectedNode.getChildCount(); // System.out.println("loops = "+ childCount); // DefaultMutableTreeNode newChild = new DefaultMutableTreeNode(); // for(int i = 0; i < childCount; i++){ // newChild = (DefaultMutableTreeNode)( selectedNode.getChildAt(0)); // tn1.add(newChild); // } if (resultTree==null){ resultTree = new JTree(); getContentPane().add(new JScrollPane(resultTree), BorderLayout.CENTER); setVisible(true); } resultTree.setModel(new DefaultTreeModel(selectedNode)); } } private void processPrime(Element el, DefaultMutableTreeNode dmtn, int lev) { Iterator children = el.getChildren().iterator(); while (children.hasNext()) { Object childObject = children.next(); DefaultMutableTreeNode currentNode = new DefaultMutableTreeNode(((Element) childObject).getName()); processElement( (Element) childObject, dmtn); } lev--; } private void processTail(Element el, DefaultMutableTreeNode dmtn, int lev) { lev--; } public static void main(String args[]) throws Exception { SAXBuilder builder = new SAXBuilder(); Document doc = builder.build(new File("C://Users//Brugu Maharishi//Documents//Google Talk Received Files//cs3.html")); XMLTreeViewer viewer = new XMLTreeViewer(doc); viewer.addWindowListener(new java.awt.event.WindowAdapter() { public void windowClosing(java.awt.event.WindowEvent e) { System.exit(0); } }); } }
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