Building tree node in swing:checkBox+image+node name

I want to add checkbox to my tree.
**I already have image and some name attached with each node.
But,now i also want to add checkbox with each node.
Plz tell me :
**If there is any direct tree attribute for checkboxes or how can i achieve it.
thanx

http://forum.java.sun.com/thread.jspa?messageID=4259336

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Help with building a JTree using tree node and node renderers

Hi,
I am having a few problems with JTree's. basically I want to build JTree from a web spider. The webspide searches a website checking links and stores the current url that is being processed as a string in the variable msg. I wan to use this variable to build a JTree in a new class and then add it to my GUI. I have created a tree node class and a renderer node class, these classes are built fine. can someone point me in the direction for actually using these to build my tree in a seperate class and then displaying it in a GUI class?
*nodeRenderer.java
import javax.swing.*;
import javax.swing.tree.*;
import java.awt.*;
import java.net.*;
public class nodeRenderer extends DefaultTreeCellRenderer
 implements TreeCellRenderer
public static Icon icon= null;
public nodeRenderer() {
icon = new ImageIcon(getClass().getResource("icon.gif"));
public Component getTreeCellRendererComponent(
JTree tree,
Object value,
boolean sel,
boolean expanded,
boolean leaf,
int row,
boolean hasFocus) {
super.getTreeCellRendererComponent(
tree, value, sel,
expanded, leaf, row,
hasFocus);
treeNode node = (treeNode)(((DefaultMutableTreeNode)value).getUserObject());
if(icon != null) // set a custom icon
setOpenIcon(icon);
setClosedIcon(icon);
setLeafIcon(icon);
 return this;
*treeNode.java
*this is the class to represent a node
import javax.swing.*;
import javax.swing.tree.*;
import java.util.*;
import java.net.*;
* Class used to hold information about a web site that has
* been searched by the spider class
public class treeNode
*Url from the WebSpiderController Class
*that is currently being processed
public String msg;
treeNode(String urlText)
 msg = urlText;
String getUrlText()
 return msg;
//gui.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
import java.net.*;
import java.io.*;
import java.util.*;
public class gui extends JFrame implements Runnable
 *declare variable, boolean
 *thread, a object and a center
 *pane
 protected URL urlInput;
 protected Thread bgThread;
 protected boolean run = false;
 protected WebSpider webSpider;
 public gui()
 *create the gui here
 setTitle("Testing Tool");
 setSize(600,600);
 //add Buttons to the tool bar
 start.setText("Start");
 start.setActionCommand("Start");
 toolBar.add(start);
 ButtonListener startListener = new ButtonListener();
 start.addActionListener(startListener);
 cancel.setText("Cancel");
 cancel.setActionCommand("Cancel");
 toolBar.add(cancel);
 ButtonListener cancelListener = new ButtonListener();
 cancel.addActionListener(cancelListener);
 close.setText("Close");
 close.setActionCommand("Close");
 toolBar.add(close);
 ButtonListener closeListener = new ButtonListener();
 close.addActionListener(closeListener);
 //creat a simple form
 urlLabel.setText("Enter URL:");
 urlLabel.setBounds(100,36,288,24);
 formTab.add(urlLabel);
 url.setBounds(170,36,288,24);
 formTab.add(url);
 current.setText("Currently Processing: ");
 current.setBounds(100,80,288,24);
 formTab.add(current);
 //add scroll bars to the error messages screen and website structure
 errorPane.setAutoscrolls(true);
 errorPane.setHorizontalScrollBarPolicy(javax.swing.
 ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
 errorPane.setVerticalScrollBarPolicy(javax.swing.
 ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
 errorPane.setOpaque(true);
 errorTab.add(errorPane);
 errorPane.setBounds(0,0,580,490);
 errorText.setEditable(false);
 errorPane.getViewport().add(errorText);
 errorText.setBounds(0,0,600,550);
 treePane.setAutoscrolls(true);
 treePane.setHorizontalScrollBarPolicy(javax.swing.
 ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
 treePane.setVerticalScrollBarPolicy(javax.swing.
 ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
 treePane.setOpaque(true);
 treeTab.add(treePane);
 treePane.setBounds(0,0,580,490);
 treeText.setEditable(false);
 treePane.getViewport().add(treeText);
 treeText.setBounds(0,0,600,550);
 //create the tabbed window
centerPane.setBorder(new javax.swing.border.EtchedBorder());
formTab.setLayout(null);
errorTab.setLayout(null);
treeTab.setLayout(null);
centerPane.addTab("Search Parameters", formTab);
centerPane.addTab("Error Messages", errorTab);
centerPane.addTab("Website Structure", treeTab);
 //add the tool bar and tabbed pane
 getContentPane().add(toolBar, java.awt.BorderLayout.NORTH);
getContentPane().add(centerPane, java.awt.BorderLayout.CENTER);
 *create the tool bar pane, a center pane, add the buttons,
 *labels, tabs, a text field for user input here
 javax.swing.JPanel toolBar = new javax.swing.JPanel();
 javax.swing.JButton start = new javax.swing.JButton();
 javax.swing.JButton cancel = new javax.swing.JButton();
 javax.swing.JButton close = new javax.swing.JButton();
 javax.swing.JTabbedPane centerPane = new javax.swing.JTabbedPane();
 javax.swing.JPanel formTab = new javax.swing.JPanel();
 javax.swing.JLabel urlLabel = new javax.swing.JLabel();
 javax.swing.JLabel current = new javax.swing.JLabel();
 javax.swing.JTextField url = new javax.swing.JTextField();
 javax.swing.JPanel errorTab = new javax.swing.JPanel();
 javax.swing.JTextArea errorText = new javax.swing.JTextArea();
 javax.swing.JScrollPane errorPane = new javax.swing.JScrollPane();
 javax.swing.JPanel treeTab = new javax.swing.JPanel();
 javax.swing.JTextArea treeText = new javax.swing.JTextArea();
 javax.swing.JScrollPane treePane = new javax.swing.JScrollPane();
 javax.swing.JTree searchTree = new javax.swing.JTree();
 *show the gui
 public static void main(String args[])
 (new gui()).setVisible(true);
 *listen for the button presses and set the
 *boolean flag depending on which button is pressed
 class ButtonListener implements ActionListener
 public void actionPerformed(ActionEvent event)
 Object object = event.getSource();
 if (object == start)
 run = true;
 startActionPerformed(event);
 if (object == cancel)
 run = false;
 startActionPerformed(event);
 if (object == close)
 System.exit(0);
 *this method is called when the start or
 *cancel button is pressed.
 void startActionPerformed (ActionEvent event)
 if (run == true && bgThread == null)
 bgThread = new Thread(this);
 bgThread.start();
 if (run == false && bgThread != null)
 webSpider.cancel();
 *this mehtod will start the background thred.
 *the background thread is required so that the
 *GUI is still displayed
 public void run()
 try
 webSpider = new WebSpider(this);
 webSpider.clear();
 urlInput = new URL(url.getText());
 webSpider.addURL(urlInput);
 webSpider.run();
 bgThread=null;
 catch (MalformedURLException e)
 addressError addErr = new addressError();
 addErr.addMsg = "URL ERROR - PLEASE CHECK";
 SwingUtilities.invokeLater(addErr);
 *this method is called by the web spider
 *once a url is found. Validation of navigation
 *happens here.
 public boolean urlFound(URL urlInput,URL url)
 CurrentlyProcessing pro = new CurrentlyProcessing();
 pro.msg = url.toString();
 SwingUtilities.invokeLater(pro);
 if (!testLink(url))
 navigationError navErr = new navigationError();
 navErr.navMsg = "Broken Link "+url+" caused on "+urlInput+"\n";
 return false;
 if (!url.getHost().equalsIgnoreCase(urlInput.getHost()))
 return false;
 else
 return true;
 *this method is called internally to check
 *that a link works
 protected boolean testLink(URL url)
 try
 URLConnection connection = url.openConnection();
 connection.connect();
 return true;
 catch (IOException e)
 return false;
 *this method is called when an error is
 *found.
 public void URLError(URL url)
 *this method is called when an email
 *address is found
 public void emailFound(String email)
 /*this method will update any errors found inc
 *address errors and broken links
 class addressError implements Runnable
 public String addMsg;
 public void run()
 errorText.append(addMsg);
 current.setText("Currently Processing: "+ addMsg);
 class navigationError implements Runnable
 public String navMsg;
 public void run()
 errorText.append(navMsg);
 *this method will update the currently
 *processing field on the GUI
 class CurrentlyProcessing implements Runnable
 public String msg;
 public void run()
 current.setText("Currently Processing: " + msg );
//webspider.java
import java.util.*;
import java.net.*;
import java.io.*;
import javax.swing.text.*;
import javax.swing.text.html.*;
import javax.swing.tree.*;
import javax.swing.*;
*this class implements the spider.
public class WebSpider extends HTMLEditorKit
 *make a collection of the URL's
 protected Collection urlErrors = new ArrayList(3);
 protected Collection urlsWaiting = new ArrayList(3);
 protected Collection urlsProcessed = new ArrayList(3);
 //report URL's to this class
 protected gui report;
 *this flag will indicate whether the process
 *is to be cancelled
 protected boolean cancel = false;
 *The constructor
 *report the urls to the wui class
 public WebSpider(gui report)
 this.report = report;
 *get the urls from the above declared
 *collections
 public Collection getUrlErrors()
 return urlErrors;
 public Collection getUrlsWaiting()
 return urlsWaiting;
 public Collection getUrlsProcessed()
 return urlsProcessed;
 * Clear all of the collections.
 public void clear()
 getUrlErrors().clear();
 getUrlsWaiting().clear();
 getUrlsProcessed().clear();
 *Set a flag that will cause the begin
 *method to return before it is done.
 public void cancel()
 cancel = true;
 *add the entered url for porcessing
 public void addURL(URL url)
 if (getUrlsWaiting().contains(url))
 return;
 if (getUrlErrors().contains(url))
 return;
 if (getUrlsProcessed().contains(url))
 return;
 /*WRITE TO LOG FILE*/
 log("Adding to workload: " + url );
 getUrlsWaiting().add(url);
 *process a url
 public void processURL(URL url)
 try
 /*WRITE TO LOGFILE*/
 log("Processing: " + url );
 // get the URL's contents
 URLConnection connection = url.openConnection();
 if ((connection.getContentType()!=null) &&
 !connection.getContentType().toLowerCase().startsWith("text/"))
 getUrlsWaiting().remove(url);
 getUrlsProcessed().add(url);
 log("Not processing because content type is: " +
 connection.getContentType() );
 return;
 // read the URL
 InputStream is = connection.getInputStream();
 Reader r = new InputStreamReader(is);
 // parse the URL
 HTMLEditorKit.Parser parse = new HTMLParse().getParser();
 parse.parse(r,new Parser(url),true);
catch (IOException e)
 getUrlsWaiting().remove(url);
 getUrlErrors().add(url);
 log("Error: " + url );
 report.URLError(url);
 return;
// mark URL as complete
getUrlsWaiting().remove(url);
getUrlsProcessed().add(url);
log("Complete: " + url );
*start the spider
public void run()
cancel = false;
while (!getUrlsWaiting().isEmpty() && !cancel)
 Object list[] = getUrlsWaiting().toArray();
 for (int i=0;(i<list.length)&&!cancel;i++)
 processURL((URL)list);
* A HTML parser callback used by this class to detect links
protected class Parser extends HTMLEditorKit.ParserCallback
protected URL urlInput;
public Parser(URL urlInput)
this.urlInput = urlInput;
public void handleSimpleTag(HTML.Tag t,MutableAttributeSet a,int pos)
String href = (String)a.getAttribute(HTML.Attribute.HREF);
if((href==null) && (t==HTML.Tag.FRAME))
href = (String)a.getAttribute(HTML.Attribute.SRC);
if (href==null)
return;
int i = href.indexOf('#');
if (i!=-1)
href = href.substring(0,i);
if (href.toLowerCase().startsWith("mailto:"))
report.emailFound(href);
return;
handleLink(urlInput,href);
public void handleStartTag(HTML.Tag t,MutableAttributeSet a,int pos)
handleSimpleTag(t,a,pos); // handle the same way
protected void handleLink(URL urlInput,String str)
try
 URL url = new URL(urlInput,str);
if (report.urlFound(urlInput,url))
addURL(url);
catch (MalformedURLException e)
log("Found malformed URL: " + str);
*log the information of the spider
public void log(String entry)
System.out.println( (new Date()) + ":" + entry );
I have a seperate class for parseing the HTML. Any help would be greatly appreciated
mrv

Hi Sorry to be a pain again,
I have re worked the gui class so it looks like this now:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.event.*;
import java.net.*;
import java.io.*;
import java.util.*;
public class gui extends JFrame implements Runnable
 *declare variable, boolean
 *thread, a object and a center
 *pane
 protected URL urlInput;
 protected Thread bgThread;
 protected boolean run = false;
 protected WebSpider webSpider;
 public String msgInfo;
 public String brokenUrl;
 public String goodUrl;
 public String deadUrl;
 protected DefaultMutableTreeNode rootNode;
protected DefaultTreeModel treeModel;
 public gui()
 *create the gui here
 setTitle("Testing Tool");
 setSize(600,600);
 //add Buttons to the tool bar
 start.setText("Start");
 start.setActionCommand("Start");
 toolBar.add(start);
 ButtonListener startListener = new ButtonListener();
 start.addActionListener(startListener);
 cancel.setText("Cancel");
 cancel.setActionCommand("Cancel");
 toolBar.add(cancel);
 ButtonListener cancelListener = new ButtonListener();
 cancel.addActionListener(cancelListener);
 close.setText("Close");
 close.setActionCommand("Close");
 toolBar.add(close);
 ButtonListener closeListener = new ButtonListener();
 close.addActionListener(closeListener);
 //creat a simple form
 urlLabel.setText("Enter URL:");
 urlLabel.setBounds(100,36,288,24);
 formTab.add(urlLabel);
 url.setBounds(170,36,288,24);
 formTab.add(url);
 current.setText("Currently Processing: ");
 current.setBounds(100,80,288,24);
 formTab.add(current);
 //add scroll bars to the error messages screen and website structure
 errorPane.setAutoscrolls(true);
 errorPane.setHorizontalScrollBarPolicy(javax.swing.
 ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
 errorPane.setVerticalScrollBarPolicy(javax.swing.
 ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
 errorPane.setOpaque(true);
 errorTab.add(errorPane);
 errorPane.setBounds(0,0,580,490);
 errorText.setEditable(false);
 errorPane.getViewport().add(errorText);
 errorText.setBounds(0,0,600,550);
 treePane.setAutoscrolls(true);
 treePane.setHorizontalScrollBarPolicy(javax.swing.
 ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
 treePane.setVerticalScrollBarPolicy(javax.swing.
 ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
 treePane.setOpaque(true);
 treeTab.add(treePane);
 treePane.setBounds(0,0,580,490);
 treeText.setEditable(false);
 treePane.getViewport().add(treeText);
 treeText.setBounds(0,0,600,550);
 //JTree
 // NEW CODE
 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);
 treeText.add(tree);
 //create the tabbed window
centerPane.setBorder(new javax.swing.border.EtchedBorder());
formTab.setLayout(null);
errorTab.setLayout(null);
treeTab.setLayout(null);
centerPane.addTab("Search Parameters", formTab);
centerPane.addTab("Error Messages", errorTab);
centerPane.addTab("Website Structure", treeTab);
 //add the tool bar and tabbed pane
 getContentPane().add(toolBar, java.awt.BorderLayout.NORTH);
getContentPane().add(centerPane, java.awt.BorderLayout.CENTER);
 *create the tool bar pane, a center pane, add the buttons,
 *labels, tabs, a text field for user input here
 javax.swing.JPanel toolBar = new javax.swing.JPanel();
 javax.swing.JButton start = new javax.swing.JButton();
 javax.swing.JButton cancel = new javax.swing.JButton();
 javax.swing.JButton close = new javax.swing.JButton();
 javax.swing.JTabbedPane centerPane = new javax.swing.JTabbedPane();
 javax.swing.JPanel formTab = new javax.swing.JPanel();
 javax.swing.JLabel urlLabel = new javax.swing.JLabel();
 javax.swing.JLabel current = new javax.swing.JLabel();
 javax.swing.JTextField url = new javax.swing.JTextField();
 javax.swing.JPanel errorTab = new javax.swing.JPanel();
 javax.swing.JTextArea errorText = new javax.swing.JTextArea();
 javax.swing.JScrollPane errorPane = new javax.swing.JScrollPane();
 javax.swing.JPanel treeTab = new javax.swing.JPanel();
 javax.swing.JTextArea treeText = new javax.swing.JTextArea();
 javax.swing.JScrollPane treePane = new javax.swing.JScrollPane();
 javax.swing.JTree tree = new javax.swing.JTree();
 *show the gui
 public static void main(String args[])
 (new gui()).setVisible(true);
 *listen for the button presses and set the
 *boolean flag depending on which button is pressed
 class ButtonListener implements ActionListener
 public void actionPerformed(ActionEvent event)
 Object object = event.getSource();
 if (object == start)
 run = true;
 startActionPerformed(event);
 if (object == cancel)
 run = false;
 startActionPerformed(event);
 if (object == close)
 System.exit(0);
 *this method is called when the start or
 *cancel button is pressed.
 void startActionPerformed (ActionEvent event)
 if (run == true && bgThread == null)
 bgThread = new Thread(this);
 bgThread.start();
 //new line of code
 treeText.addObject(msgInfo);
 if (run == false && bgThread != null)
 webSpider.cancel();
 *this mehtod will start the background thred.
 *the background thread is required so that the
 *GUI is still displayed
 public void run()
 try
 webSpider = new WebSpider(this);
 webSpider.clear();
 urlInput = new URL(url.getText());
 webSpider.addURL(urlInput);
 webSpider.run();
 bgThread = null;
 catch (MalformedURLException e)
 addressError addErr = new addressError();
 addErr.addMsg = "URL ERROR - PLEASE CHECK";
 SwingUtilities.invokeLater(addErr);
 *this method is called by the web spider
 *once a url is found. Validation of navigation
 *happens here.
 public boolean urlFound(URL urlInput,URL url)
 CurrentlyProcessing pro = new CurrentlyProcessing();
 pro.msg = url.toString();
 SwingUtilities.invokeLater(pro);
 if (!testLink(url))
 navigationError navErr = new navigationError();
 navErr.navMsg = "Broken Link "+url+" caused on "+urlInput+"\n";
 brokenUrl = url.toString();
 return false;
 if (!url.getHost().equalsIgnoreCase(urlInput.getHost()))
 return false;
 else
 return true;
 *this method is returned if there is no link
 *on a web page, e.g. there us a dead end
 public void urlNotFound(URL urlInput)
 deadEnd dEnd = new deadEnd();
 dEnd.dEMsg = "No links on "+urlInput+"\n";
 deadUrl = urlInput.toString();
 *this method is called internally to check
 *that a link works
 protected boolean testLink(URL url)
 try
 URLConnection connection = url.openConnection();
 connection.connect();
 goodUrl = url.toString();
 return true;
 catch (IOException e)
 return false;
 *this method is called when an error is
 *found.
 public void urlError(URL url)
 *this method is called when an email
 *address is found
 public void emailFound(String email)
 /*this method will update any errors found inc
 *address errors and broken links
 class addressError implements Runnable
 public String addMsg;
 public void run()
 current.setText("Currently Processing: "+ addMsg);
 errorText.append(addMsg);
 class navigationError implements Runnable
 public String navMsg;
 public void run()
 errorText.append(navMsg);
 class deadEnd implements Runnable
 public String dEMsg;
 public void run()
 errorText.append(dEMsg);
 *this method will update the currently
 *processing field on the GUI
 public class CurrentlyProcessing implements Runnable
 public String msg;
 //new line
 public String msgInfo = msg;
 public void run()
 current.setText("Currently Processing: " + msg );
 * NEW CODE
 * NEED THIS CODE SOMEWHERE
 * treeText.addObject(msgInfo);
 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());
 if (shouldBeVisible)
 tree.scrollPathToVisible(new TreePath(childNode.getPath()));
 return childNode;
 public class MyTreeModelListener implements TreeModelListener
 public void treeNodesChanged (TreeModelEvent e)
 DefaultMutableTreeNode node;
 node = (DefaultMutableTreeNode)
 (e.getTreePath().getLastPathComponent());
 try
 int index = e.getChildIndices()[0];
 node = (DefaultMutableTreeNode)
 (node.getChildAt(index));
 catch (NullPointerException exc)
 public void treeNodesInserted(TreeModelEvent e)
 public void treeStructureChanged(TreeModelEvent e)
 public void treeNodesRemoved(TreeModelEvent e)
I beleive that this line of code is required:
treeText.addObject(msgInfo);
I have placed it where the action events start the spider, but i keep getting this error:
cannot resolve symbol
symbol : method addObject (java.lang.String)
location: class javax.swing.JTextArea
treeText.addObject(msgInfo);
Also the jtree is not showing the window that I want it to and I am not too sure why. could you have a look to see why? i think it needs a fresh pair of eyes.
Many thanks
MrV

Setting annimated image to tree node

Hi all,
I am setting an annimated gif image to tree node like this,
ImageIcon newIcon = ImageIcon.get("test.gif");
setClosedIcon(newIcon);
setOpenIcon(newIcon);
setLeafIcon(newIcon);
but with this the annimation effect doesn't appear in the node.
It is only static image without annimation.
what is wrong here?
how to achieve annimation on tree node?
pls help
-Soni

Thanks for the reply Frank.
I saw the link http://sreevardhanadf.blogspot.in/2012/07/showing-next-row-as-current-row-after.html
However the issue is since I am using custom created tree using POJO tree item (composite object).
calling myTree.getWrappedData() doesn't gives me a handle to JUCtrlHierBinding and subsequent access to JUCtrlHierNodeBinding.
my program gives me data like -
List<MyTreeItem> treeData = (List<MyTreeItem>)treeModel.getWrappedData();
because my tree model is build using -
treeModel = new ChildPropertyTreeModel(items, "children");
where items is List of <MyTreeItem>
Hence I am unable to get a handle using -
List nodeParentList = nodeParent .getKeyPath();
I am programmatically able to invoke the parent node to get the fresh data, only issue is the focus/selection of that node is not happening
Is there a way around?
Thanks
Sachin

Using checkboxes as tree nodes

Hi friends,
can I add checkboxes as tree nodes? if yes, how this can be done?
Thanks in advances.

Hi,
sorry, but this question is not really easy to parse ( I tried two times and gave up ), can you reword it. What is it that you want to synchronize with a tree selection ?
Frank

Zynq Petalinux 2014.4 device tree node for two SD card interfaces?

I'm using a 3rd party zynq module (Trenz TE0720) for which they provide a .bsp file. The resulting Petalinux build boots just fine out of the SD card. But the module also has an on board eMMC memory that should look llike second SD card and it is connected to the zynq's second sdhci controller. But Linux is unaware of its existence.
The likely cause is an omission from the device tree script and I would imagine it should be possible to add the missing device tree node. However all of attempts thus far have failed. The (very simple) device tree script looks like the below.
Can anyone point me to a correct SD card device tree node for a Petalinux 2014.4 device tree script? Also the full present device tree script archive is attached. Thanks!
/dts-v1/;
/include/ "system-conf.dtsi"
aliases {
mio = &gpio0;
/* TE0720-02 uses Spansion Flash */
&qspi {
flash0: flash@0 {
compatible = "spansion,s25fl256s1";
&usb0 {
dr_mode = "host";
&gem0 {
phy-handle = <&phy0>;
mdio {
#address-cells = <1>;
#size-cells = <0>;
phy0: phy@0 {
compatible = "marvell,88e1510";
device_type = "ethernet-phy";
reg = <0>;
/* restore LED settings */
marvell,reg-init = <0x3 0x10 0x0000 0x0501 0x3 0x11 0x0000 0x4415>;
&i2c1 {
/* Real Time Clock RAM is not supported, map as EEPROM */
eeprom@57 {
compatible = "at,24c01";
reg = <0x57>;
/* Real Time Clock, rtc0 name can used to set time at startup! */
rtc0: rtc@6F {
compatible = "isl12022";
reg = <0x6F>;
};

I figured out a solution by myself:
The Kernel image was not read from the correct position in the QSPI flash. In order to find out which is the correct address to read from, I modified the .bif-file (./build/bootgen.bif) that was generated by petalinux-package:
the_ROM_image:
[bootloader] ./images/linux/zynq_fsbl.elf
./images/linux/u-boot.elf
./images/linux/image.ub
Then I executed:
bootgen -image newbif.bif -o test.bin -debug -w
The -debug is important here. This gave me:
*** After Link
-- Dump of Binary cache ----
00000000 Len: 000008a0 Res: 00000000 "BootHeader"
000008c0 Len: 00000014 Res: 00000000 "ImageHeaderTable"
00000900 Len: 00000024 Res: 00000000 "ImageHeader zynq_fsbl.elf"
00000940 Len: 00000020 Res: 00000000 "ImageHeader u-boot.elf"
00000980 Len: 00000020 Res: 00000300 "ImageHeader image.ub"
00000c80 Len: 00000040 Res: 00000000 "PartitionHeader zynq_fsbl.elf.0"
00000cc0 Len: 00000040 Res: 00000000 "PartitionHeader u-boot.elf.0"
00000d00 Len: 00000040 Res: 00000000 "PartitionHeader image.ub.0"
00000d40 Len: 00000040 Res: 000009c0 "PartitionHeader Null"
00001700 Len: 0001800c Res: 00000000 "zynq_fsbl.elf.0"
00019740 Len: 00043054 Res: 00000000 "u-boot.elf.0"
0005c7c0 Len: 00691ac0 Res: 00000000 "image.ub.0"
-- End of Dump
Here we see that the Kernel image is to be found at an offset of 0x0005c7c0 and has a length of 0x00691ac0.
The image can therefore be booted in u-boot by doing:
U-Boot-PetaLinux> sf read $netstart 0005c7c0 00691ac0
SF: 6888128 bytes @ 0x5c7c0 Read: OK
U-Boot-PetaLinux> bootm $netstart
This loads and successfully boots the kernel, finally presenting me a login prompt.
Hope this helps someone in the future.

How to resize a custom tree node like you would a JFrame window?

Hello,
I am trying to resize a custom tree node like you would a JFrame window.
As with a JFrame, when your mouse crosses the Border, the cursor should change and you are able to drag the edge to resize the node.
However, I am faced with a problem. Border cannot detect this and I dont want to use a mouse motion listener (with a large number of nodes, I fear it will be inefficient, calculating every node's position constantly).
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Insets;
import java.util.EventObject;
import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellEditor;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeSelectionModel;
public class ResizeNode extends JPanel {
 AnilTreeCellRenderer2 atcr;
 AnilTreeCellEditor2 atce;
 DefaultTreeModel treeModel;
 JTree tree;
 DefaultMutableTreeNode markedNode = null;
 public ResizeNode() {
 super(new BorderLayout());
 treeModel = new DefaultTreeModel(null);
 tree = new JTree(treeModel);
 tree.setEditable(true);
 tree.getSelectionModel().setSelectionMode(
 TreeSelectionModel.SINGLE_TREE_SELECTION);
 tree.setShowsRootHandles(true);
 tree.setCellRenderer(atcr = new AnilTreeCellRenderer2());
 tree.setCellEditor(atce = new AnilTreeCellEditor2(tree, atcr));
 JScrollPane scrollPane = new JScrollPane(tree);
 add(scrollPane,BorderLayout.CENTER);
 public void setRootNode(DefaultMutableTreeNode node) {
 treeModel.setRoot(node);
 treeModel.reload();
 public static void main(String[] args){
 ResizeNode tb = new ResizeNode();
 tb.setPreferredSize(new Dimension(400,200));
 JFrame frame = new JFrame("ResizeNode");
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 frame.setContentPane(tb);
 frame.setSize(400, 200);
 frame.pack();
 frame.setVisible(true);
 tb.populate();
 private void populate() {
 TextAreaNode2 r = new TextAreaNode2(this);
 setRootNode(r);
 TextAreaNode2 a = new TextAreaNode2(this);
 treeModel.insertNodeInto(a, r, r.getChildCount());
class AnilTreeCellRenderer2 extends DefaultTreeCellRenderer{
TreeBasic panel;
DefaultMutableTreeNode currentNode;
public AnilTreeCellRenderer2() {
 super();
public Component getTreeCellRendererComponent
 (JTree tree, Object value, boolean selected, boolean expanded,
 boolean leaf, int row, boolean hasFocus){
 TextAreaNode2 currentNode = (TextAreaNode2)value;
 NodeGUI2 gNode = (NodeGUI2) currentNode.gNode;
 return gNode.box;
class AnilTreeCellEditor2 extends DefaultTreeCellEditor{
DefaultTreeCellRenderer rend;
public AnilTreeCellEditor2(JTree tree, DefaultTreeCellRenderer r){
 super(tree, r);
 rend = r;
public Component getTreeCellEditorComponent(JTree tree, Object value,
 boolean isSelected, boolean expanded, boolean leaf, int row){
 return rend.getTreeCellRendererComponent(tree, value, isSelected, expanded,
 leaf, row, true);
public boolean isCellEditable(EventObject event){
 return true;
class NodeGUI2 {
 final ResizeNode view;
 Box box = Box.createVerticalBox();
 final JTextArea aa = new JTextArea( 1, 5 );
 final JTextArea aaa = new JTextArea( 1, 8 );
 NodeGUI2( ResizeNode view_ ) {
 this.view = view_;
 box.add( aa );
 aa.setBorder( BorderFactory.createMatteBorder( 0, 0, 1, 0, Color.GREEN ) );
 box.add( aaa );
 box.setBorder( BorderFactory.createMatteBorder( 5, 5, 5, 5, Color.CYAN ) );
 private Dimension getEditorPreferredSize() {
 Insets insets = box.getInsets();
 Dimension boxSize = box.getPreferredSize();
 Dimension aaSize = aa.getPreferredSize();
 Dimension aaaSize = aaa.getPreferredSize();
 int height = aaSize.height + aaaSize.height + insets.top + insets.bottom;
 int width = Math.max( aaSize.width, aaaSize.width );
 if ( width < boxSize.width )
 width += insets.right + insets.left + 3; // 3 for cursor
 return new Dimension( width, height );
class TextAreaNode2 extends DefaultMutableTreeNode {
 NodeGUI2 gNode;
 TextAreaNode2(ResizeNode view_) {
 gNode = new NodeGUI2(view_);
}

the node on the tree is only painted on using the
renderer to do the painting work. A mouse listener
has to be added to the tree, and when moved over an
area, you have to determine if you are over the
border and which direction to update the cursor and
to know which way to resize when dragged. One of the
BasicRootPaneUI has some code that can help determine
that.Thanks for replying. What is your opinion on this alternative idea that I just had?
I am wondering if it might be easier to have a toggle button in the node that you click when you want to resize the node. Then a mouse-down and dragging the mouse will resize the node. Mouse-up will reset the toggle button, and so will mouse down in an invalid area.
Anil

Tree item when-tree-node-selected fires differently from 6i to 10g.

In forms 6i, when you keyboard navigate between tree nodes, the wtns trigger will fire. In 10g it does not. In 10g, it will fire if you press the tab key or mouse click on a node.
Anyone know if this was done on purpose?
I ran into this after finally trying my props.fmb in 10g. It works fine in 6i, but not in 10g
copy of my form is here:
http://www.tailboom.com/oracle.php
Forms [32 Bit] Version 6.0.8.18.3 (Production) cleint server
Forms [32 Bit] Version 10.1.2.0.2 (Production)
I wrote most of the tree handling code for oracle apps APPTREE. This is the code that most if not all tree's in apps uses to build standard tree. So I have a pretty good understanding of the forms tree item. And know the wtns fired for web forms 6i on every node like 6i client server. This is very strange IMO.
Thanks.
--pat

Oleg,
thanks for the reference. Although the bug you identify deals with when-tree-node-activated, it is possible they fixed the when-tree-node-selected issue at the same time. With my test tree, i can currently duplicate both issues. I tried to download the patch, but it is only available for linux and unix. No windows patch. I don't have my linux env up and running to where I can test yet. So I can not confirm.
--pat

Useful Code of the Day: Hideable Tree Nodes

Someone posted about how they could selectively hide tree nodes, and I already had this AbstractTreeModel class (which does some things DefaultTreeModel does and some it doesn't) and a concrete subclass for TreeNode objects, so I was thinking how one could do hideable nodes. So I came up with this solution.
There's 4 classes here:
- AbstractTreeModel is the base for the concrete TreeNodeTreeModel
- TreeNodeTreeModel extends AbstractTreeModel to support TreeNodes (DefautlMutableTreeNode, etc.)
- HideableMutableTreeNode which is a DefautlMutableTreeNode subclass which has a visible field (with is/set methods, of course).
- HideableTreeModel is the hideable model which is a subclass of TreeNodeTreeModel.
A HideableMutableTreeNode can be set invisible directly, but the tree still needs to be notified to update. So it's best to use the methods in HideableTreeModel which set a node's visibility which notify the tree of changes accordingly. Methods are also provided to check a full path's visibility or ensure a node including all parent nodes are visible.
A HideableTreeModel can take any TreeNode class, it doesn't have to be all HideableMutableTreeNodes, but only HideableMutableTreeNodes can be made invisible, of course. Any other TreeNode type would just be considered visible.
Hiding nodes works basically by making the tree think there's less nodes then there are. And to do this, the node counts and child index search just works by looping thru the parent's children. This has potential perfomance drawbacks of course, since one has to loop thru the node's children to get nodes every time. This could be alleviated by not supporting non-hideable nodes changing the internal maintenance of HideableMutableTreeNode contents. But I'll leave that to whoever really needs it. It shouldn't be a problem if there are are a relatively small set of child nodes in any given parent.
Also, note that the root node in the model cannot be made invisible, cuz it'd be redundant since JTree can be set to hide the root node.
// *** HideableTreeModel ***
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
* <code>HideableTreeModel</code> is an <code>TreeNodeTreeModel</code>
* implementation for <code>HideableMutableTreeNode</code> objects. The
* model can also take any other <code>javax.swing.tree.TreeNode</code>
* objects.
public class HideableTreeModel extends TreeNodeTreeModel {
 * Creates a new <code>HideableTreeModel</code> object.
 * @param root the root node
 public HideableTreeModel(TreeNode root) {
 super(root);
 * Checks if the specified node is visible. A node can only be
 * hidden if the node is an instance of <code>HideableMutableTreeNode</code>. 
 * 
 * Note that this only test the visibility of the specified node, not
 * whether a parent node is visible. Use <code>isPathToNodeVisible(Object)</code>
 * to check if the full path is visible.
 * @param node the node
 * @param true if the node is visible, else false
 public boolean isNodeVisible(Object node) {
 if(node != getRoot()) {
 if(node instanceof HideableMutableTreeNode) {
 return ((HideableMutableTreeNode)node).isVisible();
 return true;
 * Sets the specified node to be hidden. A node can only be made hidden
 * if the node is an instance of <code>HideableMutableTreeNode</code>. 
 * 
 * Note that this method will notify the tree to reflect any changes to
 * node visibility. 
 * 
 * Note that this will not alter the visibility of any nodes in the
 * specified node's path to the root node. Use
 * <code>ensurePathToNodeVisible(Object)</code> instead to make sure the
 * full path down to that node is visible. 
 * 
 * Note that this method will notify the tree to reflect any changes to
 * node visibility.
 * @param node the node
 * @param v true for visible, false for hidden
 * @param true if the node's visibility could actually change, else false
 public boolean setNodeVisible(Object node, boolean v) {
 // can't hide root
 if(node != getRoot()) {
 if(node instanceof HideableMutableTreeNode) {
 HideableMutableTreeNode n = (HideableMutableTreeNode)node;
 // don't fix what ain't broke...
 if(v != n.isVisible()) {
 TreeNode parent = n.getParent();
 if(v) {
 // need to get index after showing...
 n.setVisible(v);
 int index = getIndexOfChild(parent, n);
 super.nodeInserted(parent, n, index);
 } else {
 // need to get index before hiding...
 int index = getIndexOfChild(parent, n);
 n.setVisible(v);
 super.nodeRemoved(parent, n, index);
 return true;
 return false;
 * Checks if the specified node is visible and all nodes above it are
 * visible.
 * @param node the node
 * @param true if the path is visible, else false
 public boolean isPathToNodeVisible(Object node) {
 Object[] path = getPathToRoot(node);
 for(int i = 0; i < path.length; i++) {
 if(!isNodeVisible(path)) {
 return false;
 return true;
 * Sets the specified node and all nodes above it to be visible.
 * Note that this method will notify the tree to reflect any changes to
 * node visibility.
 * @param node the node
 public void ensurePathToNodeVisible(Object node) {
 Object[] path = getPathToRoot(node);
 for(int i = 0; i < path.length; i++) {
 setNodeVisible(path[i], true);
 * Returns the child of parent at index index in the parent's child array.
 * @param parent the parent node
 * @param index the index
 * @return the child or null if no children
 public Object getChild(Object parent, int index) {
 if(parent instanceof TreeNode) {
 TreeNode p = (TreeNode)parent;
 for(int i = 0, j = -1; i < p.getChildCount(); i++) {
 TreeNode pc = (TreeNode)p.getChildAt(i);
 if(isNodeVisible(pc)) {
 j++;
 if(j == index) {
 return pc;
 return null;
 * Returns the number of children of parent.
 * @param parent the parent node
 * @return the child count
 public int getChildCount(Object parent) {
 int count = 0;
 if(parent instanceof TreeNode) {
 TreeNode p = (TreeNode)parent;
 for(int i = 0; i < p.getChildCount(); i++) {
 TreeNode pc = (TreeNode)p.getChildAt(i);
 if(isNodeVisible(pc)) {
 count++;
 return count;
 * Returns the index of child in parent.
 * @param parent the parent node
 * @param child the child node
 * @return the index of the child node in the parent
 public int getIndexOfChild(Object parent, Object child) {
 int index = -1;
 if(parent instanceof TreeNode && child instanceof TreeNode) {
 TreeNode p = (TreeNode)parent;
 TreeNode c = (TreeNode)child;
 if(isNodeVisible(c)) {
 index = 0;
 for(int i = 0; i < p.getChildCount(); i++) {
 TreeNode pc = (TreeNode)p.getChildAt(i);
 if(pc.equals(c)) {
 return index;
 if(isNodeVisible(pc)) {
 index++;
 return index;
 * Main method for testing.
 * @param args the command-line arguments
 public static void main(String[] args) {
 JFrame f = new JFrame();
 f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 HideableMutableTreeNode root = new HideableMutableTreeNode("root");
 root.add(new HideableMutableTreeNode("child_1"));
 final HideableMutableTreeNode c2 = new HideableMutableTreeNode("child_2");
 c2.setVisible(false);
 final HideableMutableTreeNode c2a = new HideableMutableTreeNode("child_2_A");
 c2.add(c2a);
 c2.add(new HideableMutableTreeNode("child_2_B"));
 root.add(c2);
 HideableMutableTreeNode c3 = new HideableMutableTreeNode("child_3");
 HideableMutableTreeNode cC = new HideableMutableTreeNode("child_3_C");
 cC.setVisible(false);
 c3.add(cC);
 c3.add(new HideableMutableTreeNode("child_3_D"));
 root.add(c3);
 root.add(new HideableMutableTreeNode("child_4"));
 root.add(new HideableMutableTreeNode("child_5"));
 DefaultMutableTreeNode c6 = new DefaultMutableTreeNode("child_6");
 c6.add(new DefaultMutableTreeNode("child_6_A"));
 c6.add(new DefaultMutableTreeNode("child_6_B"));
 root.add(c6);
 final HideableTreeModel model = new HideableTreeModel(root);
 JTree tree = new JTree(model);
 f.getContentPane().add(new JScrollPane(tree), BorderLayout.CENTER);
 JButton b = new JButton("toggle");
 b.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) {
 model.setNodeVisible(c2, !model.isNodeVisible(c2));
 //model.ensurePathToNodeVisible(c2a);
 f.getContentPane().add(b, BorderLayout.SOUTH);
 f.pack();
 f.setSize(300, 500);
 f.show();
// *** HideableMutableTreeNode ***
import javax.swing.*;
import javax.swing.tree.*;
* <code>HideableMutableTreeNode</code> is a <code>DefaultMutableTreeNode</code>
* implementation that works with <code>HideableTreeModel</code>.
public class HideableMutableTreeNode extends DefaultMutableTreeNode {
 * The node is visible flag.
 public boolean visible = true;
 * Creates a tree node that has no parent and no children, but which
 * allows children.
 public HideableMutableTreeNode() {
 super();
 * Creates a tree node with no parent, no children, but which allows
 * children, and initializes it with the specified user object.
 * @param userObject - an Object provided by the user that
 * constitutes the node's data
 public HideableMutableTreeNode(Object userObject) {
 super(userObject);
 * Creates a tree node with no parent, no children, initialized with the
 * specified user object, and that allows children only if specified.
 * @param userObject - an Object provided by the user that
 * constitutes the node's data
 * @param allowsChildren - if true, the node is allowed to have child
 * nodes -- otherwise, it is always a leaf node
 public HideableMutableTreeNode(Object userObject, boolean allowsChildren) {
 super(userObject, allowsChildren);
 * Checks if the node is visible.
 * @return true if the node is visible, else false
 public boolean isVisible() {
 return this.visible;
 * Sets if the node is visible.
 * @param v true if the node is visible, else false
 public void setVisible(boolean v) {
 this.visible = v;
// *** TreeNodeTreeModel ***
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
* <code>TreeNodeTreeModel</code> is an <code>AbstractTreeModel</code>
* implementation for <code>javax.swing.tree.TreeNode</code> objects.
public class TreeNodeTreeModel extends AbstractTreeModel {
 * Creates a new <code>TreeNodeTreeModel</code> object.
 * @param root the root node
 public TreeNodeTreeModel(TreeNode root) {
 super();
 setRoot(root);
 * Returns the parent of the child node.
 * @param node the child node
 * @return the parent or null if root
 public Object getParent(Object node) {
 if(node != getRoot() && (node instanceof TreeNode)) {
 return ((TreeNode)node).getParent();
 return null;
 * Returns the child of parent at index index in the parent's child array.
 * @param parent the parent node
 * @param index the index
 * @return the child or null if no children
 public Object getChild(Object parent, int index) {
 if(parent instanceof TreeNode) {
 return ((TreeNode)parent).getChildAt(index);
 return null;
 * Returns the number of children of parent.
 * @param parent the parent node
 * @return the child count
 public int getChildCount(Object parent) {
 if(parent instanceof TreeNode) {
 return ((TreeNode)parent).getChildCount();
 return 0;
 * Returns the index of child in parent.
 * @param parent the parent node
 * @param child the child node
 * @return the index of the child node in the parent
 public int getIndexOfChild(Object parent, Object child) {
 if(parent instanceof TreeNode && child instanceof TreeNode) {
 return ((TreeNode)parent).getIndex((TreeNode)child);
 return -1;
 * Returns true if node is a leaf.
 * @param node the node
 * @return true if the node is a leaf
 public boolean isLeaf(Object node) {
 if(node instanceof TreeNode) {
 return ((TreeNode)node).isLeaf();
 return true;
 * Main method for testing.
 * @param args the command-line arguments
 public static void main(String[] args) {
 JFrame f = new JFrame();
 f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
 root.add(new DefaultMutableTreeNode("child_1"));
 DefaultMutableTreeNode c2 = new DefaultMutableTreeNode("child_2");
 c2.add(new DefaultMutableTreeNode("child_2_A"));
 c2.add(new DefaultMutableTreeNode("child_2_B"));
 root.add(c2);
 root.add(new DefaultMutableTreeNode("child_3"));
 root.add(new DefaultMutableTreeNode("child_4"));
 JTree tree = new JTree(new TreeNodeTreeModel(root));
 f.getContentPane().add(new JScrollPane(tree));
 f.pack();
 f.setSize(300, 500);
 f.show();
// *** AbstractTreeModel ***
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.text.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
public abstract class AbstractTreeModel implements TreeModel {
 * The list of tree model listeners.
 private Vector modelListeners = new Vector();
 * The root object of the tree.
 private Object root = null;
 * Basic no-op constructor.
 public AbstractTreeModel() {
 * Gets the root object of the tree.
 * @return the root object
 public Object getRoot() {
 return this.root;
 * Sets the root object of the tree.
 * @param r the root object
 protected void setRoot(Object r) {
 this.root = r;
 * Gets the path to the root node for the specified object.
 * @param node the root node
 * @return the path to the object or <CODE>null</CODE>
 public Object[] getPathToRoot(Object node) {
 return getPathToRoot(node, 0);
 * Gets the path to the root node for the specified object.
 * @param node the root node
 * @param i the current index
 * @return the path to the object or <CODE>null</CODE>
 private Object[] getPathToRoot(Object node, int i) {
 Object anode[];
 if(node == null) {
 if(i == 0) {
 return null;
 anode = new Object[i];
 } else {
 i++;
 if(node == getRoot()) {
 anode = new Object[i];
 } else {
 anode = getPathToRoot(getParent(node), i);
 anode[anode.length - i] = node;
 return anode;
 * Gets the parent object of the specified object. This method is not
 * part of the <code>javax.swing.tree.TreeModel</code> interface, but is
 * required to support the <code>getPathToRoot(Object)</code> method,
 * which is widely used in this class. Therefore, it is important to
 * correctly implement this method.
 * @param obj the object
 * @parma the parent object or null if no parent or invalid object
 protected abstract Object getParent(Object obj);
 * Adds a listener for the <CODE>TreeModelEvent</CODE> posted after the
 * tree changes.
 * @param l the tree model listener
 public void addTreeModelListener(TreeModelListener l) {
 modelListeners.addElement(l);
 * Removes a listener previously added with addTreeModelListener().
 * @param l the tree model listener
 public void removeTreeModelListener(TreeModelListener l) {
 modelListeners.removeElement(l);
 * Forces the tree to reload. This is useful when many changes occur
 * under the root node in the tree structure.
 * NOTE: This will cause the tree to be collapsed. To maintain
 * the expanded nodes, see the <code>getExpandedPaths(JTree)</code>
 * and <code>expandPaths(JTree, ArrayList)</code> methods.
 * @see #getExpandedPaths(JTree)
 * @see #expandPaths(JTree, ArrayList)
 public void reload() {
 reload(getRoot());
 * Forces the tree to repaint. This is useful when many changes occur
 * under a specific node in the tree structure.
 * NOTE: This will cause the tree to be collapsed below the
 * updated node.
 * @param node the node that changed
 public void reload(Object node) {
 if(node != null) {
 TreePath tp = new TreePath(getPathToRoot(node));
 fireTreeStructureChanged(new TreeModelEvent(this, tp));
 * Messaged when the user has altered the value for the item identified
 * by <CODE>path</CODE> to <CODE>newValue</CODE>.
 * @param path the path to the changed object
 * @param newValue the new value
 public void valueForPathChanged(TreePath path, Object newValue) {
 nodeChanged(path.getLastPathComponent());
 * Notifies the tree that nodes were inserted. The index is looked up
 * automatically.
 * @param node the parent node
 * @param child the inserted child node
 public void nodeInserted(Object node, Object child) {
 nodeInserted(node, child, -1);
 * Notifies the tree that nodes were inserted.
 * @param node the parent node
 * @param child the inserted child node
 * @param index the index of the child
 public void nodeInserted(Object node, Object child, int index) {
 if(index < 0) {
 index = getIndexOfChild(node, child);
 if(node != null && child != null && index >= 0) {
 TreePath tp = new TreePath(getPathToRoot(node));
 int[] ai = { index };
 Object[] ac = { child };
 fireTreeNodesInserted(new TreeModelEvent(this, tp, ai, ac));
 * Notifies the tree that nodes were removed. The index is required
 * since by this point, the object will no longer be in the tree.
 * @param node the parent node
 * @param child the removed child node
 * @param index the index of the child
 public void nodeRemoved(Object node, Object child, int index) {
 if(node != null && child != null && index >= 0) {
 TreePath tp = new TreePath(getPathToRoot(node));
 int[] ai = { index };
 Object[] ac = { child };
 fireTreeNodesRemoved(new TreeModelEvent(this, tp, ai, ac));
 * Notifies the tree that a node was changed.
 * @param node the changed node
 public void nodeChanged(Object node) {
 if(node != null) {
 TreePath tp = new TreePath(getPathToRoot(node));
 fireTreeNodesChanged(new TreeModelEvent(this, tp, null, null));
 * Fires "tree nodes changed" events to all listeners.
 * @param event the tree model event
 protected void fireTreeNodesChanged(TreeModelEvent event) {
 for(int i = 0; i < modelListeners.size(); i++) {
 ((TreeModelListener)modelListeners.elementAt(i)).treeNodesChanged(event);
 * Fires "tree nodes inserted" events to all listeners.
 * @param event the tree model event
 protected void fireTreeNodesInserted(TreeModelEvent event) {
 for(int i = 0; i < modelListeners.size(); i++) {
 ((TreeModelListener)modelListeners.elementAt(i)).treeNodesInserted(event);
 * Fires "tree nodes removed" events to all listeners.
 * @param event the tree model event
 protected void fireTreeNodesRemoved(TreeModelEvent event) {
 for(int i = 0; i < modelListeners.size(); i++) {
 ((TreeModelListener)modelListeners.elementAt(i)).treeNodesRemoved(event);
 * Fires "tree structure changed" events to all listeners.
 * @param event the tree model event
 protected void fireTreeStructureChanged(TreeModelEvent event) {
 for(int i = 0; i < modelListeners.size(); i++) {
 ((TreeModelListener)modelListeners.elementAt(i)).treeStructureChanged(event);
 * Records the list of currently expanded paths in the specified tree.
 * This method is meant to be called before calling the
 * <code>reload()</code> methods to allow the tree to store the paths.
 * @param tree the tree
 * @param pathlist the list of expanded paths
 public ArrayList getExpandedPaths(JTree tree) {
 ArrayList expandedPaths = new ArrayList();
 addExpandedPaths(tree, tree.getPathForRow(0), expandedPaths);
 return expandedPaths;
 * Adds the expanded descendants of the specifed path in the specified
 * tree to the internal expanded list.
 * @param tree the tree
 * @param path the path
 * @param pathlist the list of expanded paths
 private void addExpandedPaths(JTree tree, TreePath path, ArrayList pathlist) {
 Enumeration enum = tree.getExpandedDescendants(path);
 while(enum.hasMoreElements()) {
 TreePath tp = (TreePath)enum.nextElement();
 pathlist.add(tp);
 addExpandedPaths(tree, tp, pathlist);
 * Re-expands the expanded paths in the specified tree. This method is
 * meant to be called before calling the <code>reload()</code> methods
 * to allow the tree to store the paths.
 * @param tree the tree
 * @param pathlist the list of expanded paths
 public void expandPaths(JTree tree, ArrayList pathlist) {
 for(int i = 0; i < pathlist.size(); i++) {
 tree.expandPath((TreePath)pathlist.get(i));

Hey
I'm not trying to show anyone up here, but having just built a tree model for displaying an XML document in a tree, I thought this seemed like a neat exercise.
I implemented this very differently from the @OP. I only have one class, HiddenNodeTreeModel. All the hidden node data is stored in the model itself in my class. The advantage of what I've created is it will work with any TreeModel. The disadvantage is that I think it's not going to be very scalable - the additional computing to get the number of child nodes and to adjust indexes is heavy. So if you need a scalable solution definitely don't use this.
Anyway here you go
HiddenNodeTreeModel.java
======================
package tjacobs.ui.tree;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JTree;
import javax.swing.event.TreeModelListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import tjacobs.ui.WindowUtilities;
public class HiddenNodeTreeModel implements TreeModel {
 TreeModel mModel;
 ArrayList<Object> mHidden = new ArrayList<Object>();
 public HiddenNodeTreeModel (TreeModel model) {
 mModel = model;
 public void addTreeModelListener(TreeModelListener arg0) {
 mModel.addTreeModelListener(arg0);
 private ArrayList<Integer> getHiddenChildren(Object parent) {
 ArrayList<Integer> spots = new ArrayList<Integer>();
 Iterator _i = mHidden.iterator();
 while (_i.hasNext()) {
 Object hidden = _i.next();
 int idx = mModel.getIndexOfChild(parent, hidden);
 if (idx != -1) {
 spots.add(idx);
 return spots;
 public Object getChild(Object arg0, int index) {
 ArrayList<Integer> spots = getHiddenChildren(arg0);
 Collections.sort(spots);
 Iterator<Integer> _i = spots.iterator();
 while (_i.hasNext()) {
 int num = _i.next();
 if (num <= index) {
 index++;
 return mModel.getChild(arg0, index);
 public int getChildCount(Object arg0) {
 ArrayList list = getHiddenChildren(arg0);
 System.out.println("size = " + list.size());
 return mModel.getChildCount(arg0) - list.size();
 public int getIndexOfChild(Object arg0, Object arg1) {
 int index = mModel.getIndexOfChild(arg0, arg1);
 ArrayList<Integer> spots = getHiddenChildren(arg0);
 Collections.sort(spots);
 Iterator<Integer> _i = spots.iterator();
 int toSub = 0;
 while (_i.hasNext()) {
 int num = _i.next();
 if (num <= index) {
 toSub++;
 return index - toSub;
 public Object getRoot() {
 // TODO Auto-generated method stub
 return mModel.getRoot();
 public boolean isLeaf(Object arg0) {
 // TODO Auto-generated method stub
 return mModel.isLeaf(arg0);
 public void removeTreeModelListener(TreeModelListener arg0) {
 mModel.removeTreeModelListener(arg0);
 public void valueForPathChanged(TreePath arg0, Object arg1) {
 mModel.valueForPathChanged(arg0, arg1);
 public void hideNode(Object node) {
 if (node instanceof TreePath) {
 node = ((TreePath)node).getLastPathComponent();
 mHidden.add(node);
 public void showNode(Object node) {
 mHidden.remove(node);
 public void showAll() {
 mHidden.clear();
 * @param args
 public static void main(String[] args) {
 // TODO Auto-generated method stub
 DefaultMutableTreeNode A = new DefaultMutableTreeNode("A");
 DefaultMutableTreeNode B = new DefaultMutableTreeNode("B");
 DefaultMutableTreeNode C = new DefaultMutableTreeNode("C");
 DefaultMutableTreeNode D = new DefaultMutableTreeNode("D");
 DefaultMutableTreeNode E = new DefaultMutableTreeNode("E");
 DefaultMutableTreeNode F = new DefaultMutableTreeNode("F");
 A.add(B);
 B.add(C);
 B.add(D);
 B.add(E);
 E.add(F);
 DefaultTreeModel model = new DefaultTreeModel(A);
 final HiddenNodeTreeModel hmodel = new HiddenNodeTreeModel(model);
 final JTree tree = new JTree(hmodel);
 JFrame jf = new JFrame("HiddenNodeTreeModel Test");
 jf.add(tree);
 JMenuBar bar = new JMenuBar();
 jf.setJMenuBar(bar);
 JMenu menu = new JMenu("Options");
 bar.add(menu);
 final JMenuItem hide = new JMenuItem("Hide");
 final JMenuItem show = new JMenuItem("ShowAll");
 menu.add(hide);
 menu.add(show);
 ActionListener al = new ActionListener() {
 public void actionPerformed(ActionEvent ae) {
 if (ae.getSource() == hide) {
 hmodel.hideNode(tree.getSelectionPath());
 tree.updateUI();
 else {
 hmodel.showAll();
 tree.updateUI();
 hide.addActionListener(al);
 show.addActionListener(al);
 jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 jf.setBounds(100,100,100,100);
 jf.setVisible(true);
}

How to cut, copy and paste a tree node in JTree?????

Hi, Java GUI guru. Thank you for your help in advance.
I am working on a File Explorer project with JTree. There are cut, copy and paste item menus in my menu bar. I need three EventAction methods or classes to implements the three tasks. I tried to use Clipboard to copy and paste tree node. But I can not copy any tree node from my tree.
Are there any body has sample source code about cut, copy, and paste for tree? If possible, would you mind send me your sample source code to [email protected]
I would appreciate you very very much for your help!!!!
X.G.

Hi, Paul Clapham:
Thank you for your quick answer.
I store the node in a DefaultMutableTreeNode variable, and assign it to another DefaultMutableTreeNode variable. I set up two classes (CopyNode and PasteNode). Here they are as follows:
//CopyNode class
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.event.*;
public class CopyNode implements ActionListener{
private TreeList jtree;
String treeNodeName;
TreePath currentSelection;
DefaultMutableTreeNode currentNode;
public CopyNode(TreeList t){
jtree = t;
public void actionPerformed(ActionEvent e){
currentSelection = jtree.tree.getSelectionPath();
if(currentSelection != null){
currentNode = (DefaultMutableTreeNode)(currentSelection.getLastPathComponent());
treeNodeName = currentNode.toString();
//PasteNode class
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.event.*;
public class PasteNode extends DefaultMutableTreeNode{
private TreeList jtree;
CopyNode copyNode;
public PasteNode(TreeList t){
jtree = t;
copyNode = new CopyNode(t);
public DefaultMutableTreeNode addObject(Object child){
DefaultMutableTreeNode parentNode = null;
TreePath parentPath = jtree.tree.getSelectionPath();
if(parentPath == null){
parentNode = jtree.root;
else{
parentNode = (DefaultMutableTreeNode)parentPath.getLastPathComponent();
return addObject(parentNode, child, true);
public DefaultMutableTreeNode addObject(DefaultMutableTreeNode parent, Object child, boolean shouldBeVisible){
DefaultMutableTreeNode childNode = copyNode.currentNode;
if(parent == null){
parent = jtree.root;
jtree.treemodel.insertNodeInto(childNode, parent, parent.getChildCount());
if(shouldBeVisible){
jtree.tree.scrollPathToVisible(new TreePath(childNode.getPath()));
return childNode;
I used these two classes objects in "actionPerformed(ActionEvent e)" methods in my tree:
//invoke copyNode
copyItem = new JMenuItem("Copy");
copyItem.addActionListener(copyNode);
//invoke pasteNode
pasteItem = new JMenuItem("Paste");
pasteItem.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent e){
pasteName.addObject(copyName.treeNodeName);
When I run the drive code, making a copy some node from my tree list, I got bunch of error messages.
Can you figour out what is wrong in my two classes? If you have sample code, would you mind mail me for reference.
Thank you very much in advance.
X.G.

How to trigger an ActionListener in different class on click of a tree node

Hi guyz,
There are three panels inside my main Frame
-->TopPanel,MiddlePanel and BottomPanel. I have a tree structure inside a panel. This panel along with couple more panels is in MiddlePanel. My main class is "mainClass.java". Inside that i have an actionListener for a specific button. I need to trigger that actionListener when i click one of the tree nodes in the panel i specified before. The problem is that my MiddlePanel is itself a different ".java" file which is being called in my "mainClass" when a specific button is clicked. There are different buttons in my "mainClass" file and for each one i am creating different MiddlePanels depending on the buttons clicked.
So, if i click the tree node, i need to remove the MiddlePanel and recreate the MiddlePanel(One that will be created when a different button in the mainClass file is clicked). i.e., i need to trigger the actionListener for that corresponding button. Is there a way to do it?

use this code to call different panel by selecting tree node.....ok
import javax.swing.*;
import javax.swing.tree.*;
import java.awt.*;
import java.sql.SQLException;
import javax.swing.event.*;
class MainTree extends JFrame
private static final long serialVersionUID = 1L;
 CardLayout cl = new CardLayout();
 JPanel panel = new JPanel(cl);
public MainTree() throws Exception
JPanel blankPanel = new JPanel();
blankPanel.setBorder(BorderFactory.createTitledBorder("Blank Panel"));
panel.add(blankPanel,"0");
panel.add(blankPanel,BorderLayout.CENTER);
 panel.setPreferredSize(new Dimension(800, 100));
 setSize(1000, 700);
setLocationRelativeTo(null);
setDefaultCloseOperation(EXIT_ON_CLOSE);
// getContentPane().setLayout(new GridLayout(1,2));
getContentPane().setLayout(new BorderLayout());
ConfigTree test = new ConfigTree();
DefaultMutableTreeNode mainTree = (DefaultMutableTreeNode)test.buildTree();
JTree tree = new JTree(mainTree);
tree.setCellRenderer(new DefaultTreeCellRenderer(){
private static final long serialVersionUID = 1L;
 public Component getTreeCellRendererComponent(JTree tree,Object value,
boolean sel,boolean expanded,boolean leaf,int row,boolean hasFocus){
JLabel lbl = (JLabel)super.getTreeCellRendererComponent(tree,value,sel,expanded,leaf,row,hasFocus);
NodeWithID node = (NodeWithID)((DefaultMutableTreeNode)value).getUserObject();
if(node.icon != null)lbl.setIcon(node.icon);
return lbl;
getContentPane().add(new JScrollPane(tree));
loadCardPanels((DefaultMutableTreeNode)((DefaultTreeModel)tree.getModel()).getRoot());
getContentPane().add(panel,BorderLayout.EAST);
 getContentPane().add(blankPanel,BorderLayout.WEST);
// getContentPane().add(panel);
tree.addTreeSelectionListener(new TreeSelectionListener(){
public void valueChanged(TreeSelectionEvent tse){
NodeWithID node =(NodeWithID)((DefaultMutableTreeNode)((TreePath)tse.getPath())
.getLastPathComponent()).getUserObject();
if(node.nodePanel != null)
String cardLayoutID = node.ID;
cl.show(panel,cardLayoutID);
cl.show(panel,"0");
public void loadCardPanels(DefaultMutableTreeNode dmtn)
for(int x = 0; x < dmtn.getChildCount(); x++)
if(((DefaultMutableTreeNode)dmtn.getChildAt(x)).isLeaf() == false)
loadCardPanels((DefaultMutableTreeNode)dmtn.getChildAt(x));
NodeWithID node = (NodeWithID)((DefaultMutableTreeNode)dmtn.getChildAt(x)).getUserObject();
if(node.nodePanel != null)
String cardLayoutID = node.ID;
panel.add(cardLayoutID,node.nodePanel);
public static void main(String[] args) throws Exception{new MainTree().setVisible(true);}
class ConfigTree
public Object buildTree() throws Exception
NodeWithID n0 = new NodeWithID("HelpDesk","");
NodeWithID n1 = new NodeWithID("Administrator",n0.nodeName);
NodeWithID n2 = new NodeWithID("Report Form",n1.nodeName,new Tree().getContentPane());
NodeWithID n3 = new NodeWithID("Create User",n2.nodeName,new JPanel());
NodeWithID n4 = new NodeWithID("Unlock User",n2.nodeName,new unlockui().getContentPane());
NodeWithID n5 = new NodeWithID("List User",n2.nodeName,new JPanel());
NodeWithID n6 = new NodeWithID("Assign Role",n2.nodeName,new AssignRole());
NodeWithID n9 = new NodeWithID("Operator",n1.nodeName,new JPanel());
NodeWithID n10 = new NodeWithID("Create Ticket",n9.nodeName,new JPanel());
NodeWithID n11 = new NodeWithID("My Ticket",n9.nodeName,new JPanel());
NodeWithID n12 = new NodeWithID("All Ticket",n9.nodeName,new JPanel());
NodeWithID n13 = new NodeWithID("Event Viewer",n1.nodeName,new JPanel());
DefaultMutableTreeNode top = new DefaultMutableTreeNode(n0);
DefaultMutableTreeNode branch1 = new DefaultMutableTreeNode(n1);
top.add(branch1);
DefaultMutableTreeNode node1_b1 = new DefaultMutableTreeNode(n2);
DefaultMutableTreeNode n1_node1_b1 = new DefaultMutableTreeNode(n3);
DefaultMutableTreeNode n2_node1_b1 = new DefaultMutableTreeNode(n4);
DefaultMutableTreeNode n3_node1_b1 = new DefaultMutableTreeNode(n5);
DefaultMutableTreeNode n4_node1_b1 = new DefaultMutableTreeNode(n6);
branch1.add(node1_b1);
branch1.add(n1_node1_b1);
branch1.add(n2_node1_b1);
branch1.add(n3_node1_b1);
branch1.add(n4_node1_b1);
DefaultMutableTreeNode node4_b1 = new DefaultMutableTreeNode(n9);
DefaultMutableTreeNode n1_node4_b1 = new DefaultMutableTreeNode(n10);
DefaultMutableTreeNode n2_node4_b1 = new DefaultMutableTreeNode(n11);
DefaultMutableTreeNode n3_node4_b1 = new DefaultMutableTreeNode(n12);
node4_b1.add(n1_node4_b1);
node4_b1.add(n2_node4_b1);
node4_b1.add(n3_node4_b1);
DefaultMutableTreeNode node5_b1 = new DefaultMutableTreeNode(n13);
branch1.add(node1_b1);
branch1.add(node4_b1);
branch1.add(node5_b1);
return top;
class NodeWithID
String nodeName;
String ID;
JPanel nodePanel;
ImageIcon icon;
public NodeWithID(String nn,String parentName)
nodeName = nn;
ID = parentName+" - "+nodeName;
public NodeWithID(String nn,String parentName,Container container)
this(nn,parentName);
nodePanel = (JPanel) container;
nodePanel.setBorder(BorderFactory.createTitledBorder(ID + " Panel"));
public NodeWithID(String nn,String parentName,JPanel p, ImageIcon i)
this(nn,parentName,p);
icon = i;
public String toString(){return nodeName;}
}

How do we make a newly created tree-node the currently selected one?

Hi,
We are using JHeadstart 10.1.3 - Tree Generation. We are running into several issues with the trees, especially upon creation of new tree nodes. The Form in our Tree-Form page is Saved. At that point, we would like the new node to be the selected node in the tree (and also in the tree bean).
How do you believe can we do this? Right now, after creating the new node, we have no node selected - although it seems that the new node is selected as the normally synchronized form on the right shows that node.
Thanks for any suggestions!
Lucas

Steven,
I had not upgraded to Service Update 1 - was using Build 91. After upgrading, I see some difference, but not entirely the result I was looking for.
In a Tree-Form page on Employees, when I added an employee at the same level it still did not seem to be automatically selected.
Was wondering whether perhaps this has to do with the following comment from the source code:
          // this happens when posting back to the same node level in the tree:
          // the root node binding has no children in that case, causing derivation
          // of focus row key to fail, have to find out why root node children
          // are lost. Work around for now: return the focus row key as set by
          // the user clikcing on the nodeIf not, can you explain what this comment refers to?
thanks for your help.
Lucas

How to display a search(query) on a report clicking on a tree node to open

I need to know how can I do with that when I press on the link(on a tree node(leaf)), open on the other region in the same page a classic or interactive report with my results(passed by parameter, example: ID).
One example are present on web site posted below:
http://apex.oracle.com/pls/apex/f?p=36648:34:1599336964673301::NO:::
I have tried this to composite my tree:
select case when connect_by_isleaf = 1 then 0 when level = 1 then 1 else -1 end as status, level, "NAME" as title, null as icon, "ID" as value, null as tooltip, decode(level, 1, 'f?p=&APP_ID.:106:'||:APP_SESSION||'::::P106_MAQ_ID:'||ID, 2,'f?p=&APP_ID.:106:'||:APP_SESSION||'::::::::P106_MAQ_ID:'||(ID-1000), 3,'f?p=&APP_ID.:104:'||:APP_SESSION||'::::P106_MAQ_ID:'||(ID-10000), 4,'f?p=&APP_ID.:105:'||:APP_SESSION||'::::P106_MAQ_ID:'||(ID-100000)) as link from "#OWNER#"."V_TREE1" start with "PID" is null connect by prior "ID" = "PID" order siblings by "NAME"
But the parameter passed dont do with the report change your view to the one row with ID passed. I need to obtain the same results showed on website posted above.
I obtained success on action to redirect to other page with Form with Report to edit, but dont to show. And i want to show and the same page.
below the code that i obtained to redirect:
select case when connect_by_isleaf = 1 then 0 when level = 1 then 1 else -1 end as status, level, "NAME" as title, null as icon, "ID" as value, null as tooltip, decode(level, 1, 'f?p=&APP_ID.:102:'||:APP_SESSION||'::::P102_MAQ_ID:'||ID, 2,'f?p=&APP_ID.:103:'||:APP_SESSION||'::::P103_SRV_ID:'||(ID-1000), 3,'f?p=&APP_ID.:104:'||:APP_SESSION||'::::P104_INS_ID:'||(ID-10000), 4,'f?p=&APP_ID.:105:'||:APP_SESSION||'::::P105_SIS_ID:'||(ID-100000)) as link from "#OWNER#"."V_TREE1" start with "PID" is null connect by prior "ID" = "PID" order siblings by "NAME"
Thank you so much for your help.

Muhammad,
you can add a user parameter (p_count), which get the default value value 1 for example. Then add a field (with some source of type character like desname) for your footer with a format trigger like
if :p_count=1 then
     srw.set_field_char(0,'Office Copy');
elsif :p_count=2 then
     srw.set_field_char(0,'Shop Copy');
else
     srw.set_field_char(0,'Account Dept Copy');
end;
return true;
Or you build 3 boilerplates with format triggers like
if :p_count=1 then return true; else return false; end if; for "Office Copy" .....
In the After Report Trigger start the Report with same paramters using a higher value for p_count as parameter. If p_count=3, do nothing in the trigger.
Regards
Rainer

Building tree node in swing:checkBox+image+node name

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