How to Create XML Schema From JTree ?
Please help me... Thank you.
This is Code
Tree.java -- Run This File
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.tree.DefaultMutableTreeNode;
publicclass Treeextends JPanelimplements ActionListener{
privateint newNodeSuffix = 1;
privatestatic String ADD_COMMAND ="add";
privatestatic String REMOVE_COMMAND ="remove";
privatestatic String CLEAR_COMMAND ="clear";
privatestatic String OK_COMMAND ="ok";
private DynamicTree treePanel;
public Tree(){
super(new BorderLayout());
//Create the components.
treePanel =new DynamicTree();
//populateTree(treePanel);
JButton addButton =new JButton("Add");
addButton.setActionCommand(ADD_COMMAND);
addButton.addActionListener(this);
JButton removeButton =new JButton("Remove");
removeButton.setActionCommand(REMOVE_COMMAND);
removeButton.addActionListener(this);
JButton clearButton =new JButton("Clear");
clearButton.setActionCommand(CLEAR_COMMAND);
clearButton.addActionListener(this);
JButton okButton =new JButton("OK");
okButton.setActionCommand(OK_COMMAND);
okButton.addActionListener(this);
//Lay everything out.
treePanel.setPreferredSize(new Dimension(300, 150));
add(treePanel, BorderLayout.CENTER);
JPanel panel =new JPanel(new GridLayout(0,1));
panel.add(addButton);
panel.add(removeButton);
panel.add(clearButton);
panel.add(okButton);
add(panel, BorderLayout.LINE_END);
}
/*public void populateTree(DynamicTree treePanel) {
String p1Name = new String("Parent 1");
//String p2Name = new String("Parent 2");
String c1Name = new String("Child 1");
//String c2Name = new String("Child 2");
DefaultMutableTreeNode p1;
p1 = treePanel.addObject(null, p1Name);
//p2 = treePanel.addObject(null, p2Name);
treePanel.addObject(p1, c1Name);
//treePanel.addObject(p1, c2Name);
//treePanel.addObject(p2, c1Name);
//treePanel.addObject(p2, c2Name);
}*/
publicvoid actionPerformed(ActionEvent e){
String command = e.getActionCommand();
if (ADD_COMMAND.equals(command)){
//Add button clicked.
treePanel.addObject("New Node " + newNodeSuffix++);
}elseif (REMOVE_COMMAND.equals(command)){
//Remove button clicked.
treePanel.removeCurrentNode();
}elseif (CLEAR_COMMAND.equals(command)){
//Clear button clicked.
treePanel.clear();
}elseif (OK_COMMAND.equals(command)){
//Ok button clicked.
treePanel.ok();
}
}
/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
*/
privatestaticvoid createAndShowGUI(){
//Create and set up the window.
JFrame frame =new JFrame("Craete XML Tree");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
Tree newContentPane =new Tree();
newContentPane.setOpaque(true);//content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
}
publicstaticvoid main(String[] args){
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable(){
publicvoid run(){
createAndShowGUI();
}
});
}
}
DynamicTree.java
import javax.swing.JOptionPane;
import java.awt.GridLayout;
import java.awt.Toolkit;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.MutableTreeNode;
import javax.swing.tree.TreePath;
import javax.swing.tree.TreeSelectionModel;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
publicclass DynamicTreeextends JPanel{
protected DefaultMutableTreeNode rootNode;
protected DefaultTreeModel treeModel;
protected JTree tree;
private Toolkit toolkit = Toolkit.getDefaultToolkit();
public DynamicTree(){
super(new GridLayout(1,0));
rootNode =new DefaultMutableTreeNode("Root Node");
treeModel =new DefaultTreeModel(rootNode);
treeModel.addTreeModelListener(new MyTreeModelListener());
tree =new JTree(treeModel);
tree.setEditable(true);
tree.getSelectionModel().setSelectionMode
(TreeSelectionModel.SINGLE_TREE_SELECTION);
tree.setShowsRootHandles(true);
JScrollPane scrollPane =new JScrollPane(tree);
add(scrollPane);
}
/** Remove all nodes except the root node. */
publicvoid clear(){
rootNode.removeAllChildren();
treeModel.reload();
}
publicvoid ok(){
int n = JOptionPane.showConfirmDialog(null,"Do you want to create XML Schema?","", JOptionPane.YES_NO_OPTION);
}
/** Remove the currently selected node. */
publicvoid removeCurrentNode(){
TreePath currentSelection = tree.getSelectionPath();
if (currentSelection !=null){
DefaultMutableTreeNode currentNode = (DefaultMutableTreeNode)
(currentSelection.getLastPathComponent());
MutableTreeNode parent = (MutableTreeNode)(currentNode.getParent());
if (parent !=null){
treeModel.removeNodeFromParent(currentNode);
return;
}
}
// Either there was no selection, or the root was selected.
toolkit.beep();
}
/** Add child to the currently selected node. */
public DefaultMutableTreeNode addObject(Object child){
DefaultMutableTreeNode parentNode =null;
TreePath parentPath = tree.getSelectionPath();
if (parentPath ==null){
parentNode = rootNode;
}else{
parentNode = (DefaultMutableTreeNode)
(parentPath.getLastPathComponent());
}
return addObject(parentNode, child,true);
}
public DefaultMutableTreeNode addObject(DefaultMutableTreeNode parent,
Object child){
return addObject(parent, child,false);
}
public DefaultMutableTreeNode addObject(DefaultMutableTreeNode parent,
Object child,
boolean shouldBeVisible){
DefaultMutableTreeNode childNode =
new DefaultMutableTreeNode(child);
if (parent ==null){
parent = rootNode;
}
treeModel.insertNodeInto(childNode, parent,
parent.getChildCount());
//Make sure the user can see the lovely new node.
if (shouldBeVisible){
tree.scrollPathToVisible(new TreePath(childNode.getPath()));
}
return childNode;
}
class MyTreeModelListenerimplements TreeModelListener{
publicvoid treeNodesChanged(TreeModelEvent e){
DefaultMutableTreeNode node;
node = (DefaultMutableTreeNode)
(e.getTreePath().getLastPathComponent());
/*
* If the event lists children, then the changed
* node is the child of the node we've already
* gotten. Otherwise, the changed node and the
* specified node are the same.
*/
try{
int index = e.getChildIndices()[0];
node = (DefaultMutableTreeNode)
(node.getChildAt(index));
}catch (NullPointerException exc){}
System.out.println("The user has finished editing the node.");
System.out.println("New value: " + node.getUserObject());
}
publicvoid treeNodesInserted(TreeModelEvent e){
}
publicvoid treeNodesRemoved(TreeModelEvent e){
}
publicvoid treeStructureChanged(TreeModelEvent e){
}
}
}
