JTree Node Color, to distinguish between different activities
Hi,
Situation: Dynamic JTree (Tree is constructed from as a result of Database). User has the option to either Enable / Disable node and can repeat the activities but restricted only one activity per node, the node is to be highlighted; to restrict the user from further activities.
Problem: Am a newbie to swing, after searching the forum for the same, i found few good solutions which are specific to color change of specific selected node, in a temporary context.
But we need the node color change within a same level; to distinguish either the node is either enabled / disabled.
Your help is appreciated,
durino13 wrote:
1. Is the approach above a good approach, how to load children 'lazilly'?Sounds pretty reasonable to me.
2. I also use custom renderer to display different icons for every "tree" level. When I initially expand the 4th level, everything works fine !!! Then I collapse the 4th level and expand it again and here my problem starts: my 4th level icon is set to 'root level icon' instead of '4th level' icon. This does not happen, if computerNode.removeAllChildren(); method is removed from listening above
Any idea, what am i doing wrong?Ummmm... Load the model the first time (only) the node is expanded... Putz!
And I suggest you listen deeply to Mr Jacobs... He really does know what he's talking about ;-)
... and not this time, but in future: Swing questions are best asked in [THE Swing Forum|http://forums.sun.com/forum.jspa?forumID=57].
Cheers. Keith.
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[1]. main Program:
package swing.com.test.test;
import javax.swing.JFrame;
import java.awt.BorderLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import java.io.Serializable;
import swing.com.test.test.ListPanel;
import java.awt.GridLayout;
public class ListPanelMain implements java.io.Serializable{
private JFrame frame;
* Launch the application
* @param args
public static void main(String args[]) {
try {
ListPanelMain window = new ListPanelMain();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
* Create the application
public ListPanelMain() {
initialize();
* Initialize the contents of the frame
private void initialize() {
frame = new JFrame("FileTreePanelMain");
frame.setBounds(100, 100, 900, 675);
// FieTreePanelComm ftreecomm = new FieTreePanelComm();
ListPanel ftree = new ListPanel("C:\\");
// ListAllFile ftree = new ListAllFile("C:\\");
// FileTreePanelText fileTreePanelText = new FileTreePanelText(ftreecomm);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JPanel panel = new JPanel();
panel.setLayout(new GridLayout(0, 2));
frame.getContentPane().add(panel, BorderLayout.CENTER);
// final JSplitPane splitPane = new JSplitPane();
// frame.getContentPane().add(splitPane, BorderLayout.CENTER);
// splitPane.setLeftComponent(ftree);
panel.add(ftree);
final ListRightPanel listRightPanel = new ListRightPanel(ftree);
//splitPane.setRightComponent(listRightPanel);
panel.add(listRightPanel);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
frame.pack();
frame.setVisible(true);
[2]. Program 2:
package swing.com.test.test;
//File System Tree
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.io.File;
import java.util.Iterator;
import java.util.Vector;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import javax.swing.JTree;
import javax.swing.JPanel;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import java.io.Serializable;
public class ListPanel extends JPanel implements Serializable{
protected JTree fileTree;
private FileSystemModel fileSystemModel;
private JTextArea ltextArea = new JTextArea();
protected JTextArea fileDetailsTextArea = new JTextArea();
private String str = "";
public String getlTextArea() {
//textArea.getText();
return str;
public String setlTextArea(String ta) {
ltextArea.setText(ta);
str = ta;
return str;
public ListPanel(String directory) {
//super("JTree FileSystem Viewer");
setLayout(new BorderLayout());
final JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
add(panel, BorderLayout.CENTER);
fileDetailsTextArea.setEditable(false);
fileSystemModel = new FileSystemModel(new File(directory));
fileTree = new JTree(fileSystemModel);
fileTree.setEditable(true);
fileTree.addTreeSelectionListener(new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent event) {
System.out.println("1. What we save is: getlTextArea() =" + getlTextArea() );
File file = (File) fileTree.getLastSelectedPathComponent();
fileDetailsTextArea.setText(getFileDetails(file));
final ListRightPanel lrp = new ListRightPanel(this);
lrp.textArea.setText(getFileDetails(file));
setlTextArea(getFileDetails(file));
System.out.println("2. What we save is: getlTextArea() =" + getlTextArea() );
final JSplitPane splitPane = new JSplitPane();
panel.add(splitPane, BorderLayout.CENTER);
final JPanel panel_1 = new JPanel();
splitPane.setLeftComponent(panel_1);
panel_1.add(new JScrollPane(fileTree));
final JPanel panel_2 = new JPanel();
splitPane.setRightComponent(panel_2);
panel_2.add(new JScrollPane(fileDetailsTextArea));
setVisible(true);
private String getFileDetails(File file) {
if (file == null)
return "";
StringBuffer buffer = new StringBuffer();
if (file.listFiles()!=null){
for (int i=0; i< file.listFiles().length; i++){
buffer.append(((file.listFiles())) + "\n");
System.out.println("List all files");
return buffer.toString();
public static void main(String args[]) {
new ListPanel("c:\\");
class FileSystemModel implements TreeModel {
private File root;
private Vector listeners = new Vector();
public FileSystemModel(File rootDirectory) {
root = rootDirectory;
public Object getRoot() {
return root;
public Object getChild(Object parent, int index) {
File directory = (File) parent;
String[] children = directory.list();
return new TreeFile(directory, children[index]);
public int getChildCount(Object parent) {
File file = (File) parent;
if (file.isDirectory()) {
String[] fileList = file.list();
if (fileList != null)
return file.list().length;
return 0;
public boolean isLeaf(Object node) {
File file = (File) node;
return file.isFile();
public int getIndexOfChild(Object parent, Object child) {
File directory = (File) parent;
File file = (File) child;
String[] children = directory.list();
for (int i = 0; i < children.length; i++) {
if (file.getName().equals(children[i])) {
return i;
return -1;
public void valueForPathChanged(TreePath path, Object value) {
File oldFile = (File) path.getLastPathComponent();
String fileParentPath = oldFile.getParent();
String newFileName = (String) value;
File targetFile = new File(fileParentPath, newFileName);
oldFile.renameTo(targetFile);
File parent = new File(fileParentPath);
int[] changedChildrenIndices = { getIndexOfChild(parent, targetFile) };
Object[] changedChildren = { targetFile };
fireTreeNodesChanged(path.getParentPath(), changedChildrenIndices, changedChildren);
private void fireTreeNodesChanged(TreePath parentPath, int[] indices, Object[] children) {
TreeModelEvent event = new TreeModelEvent(this, parentPath, indices, children);
Iterator iterator = listeners.iterator();
TreeModelListener listener = null;
while (iterator.hasNext()) {
listener = (TreeModelListener) iterator.next();
listener.treeNodesChanged(event);
public void addTreeModelListener(TreeModelListener listener) {
listeners.add(listener);
public void removeTreeModelListener(TreeModelListener listener) {
listeners.remove(listener);
private class TreeFile extends File {
public TreeFile(File parent, String child) {
super(parent, child);
public String toString() {
return getName();
[3]. Program 3:
package swing.com.test.test;
import java.awt.BorderLayout;
import java.io.File;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTree;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import java.io.Serializable;
public class ListRightPanel extends JPanel implements TreeSelectionListener, Serializable{
protected JTextArea textArea;
// protected ListAllFile laf;
private String str = "";
public String getlTextArea() {
//textArea.getText();
return str;
public String setlTextArea(String ta) {
str = ta;
return str;
* Create the panel
public ListRightPanel(ListPanel laff) {
super();
setLayout(new BorderLayout());
final JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
add(panel, BorderLayout.CENTER);
textArea = new JTextArea();
final String st = laff.getlTextArea();
System.out.println("####################################");
System.out.println("st=" + st);
laff.fileTree.addTreeSelectionListener(new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent event) {
//laff.textArea.setText(getFileDetails(file));
textArea.setText(getlTextArea());
System.out.println("ListRightPanel Was Invoked from ListPanel!!getlTextArea() =" + getlTextArea() );
System.out.println("st=" + st);
panel.add(textArea, BorderLayout.CENTER);
public void valueChanged(TreeSelectionEvent e){};
It is runnable program, just compile and run it in Console is ok,
Regards
SunnyThnaks, code post again, see
[1]. package swing.com.test.test;
import javax.swing.JFrame;
import java.awt.BorderLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import java.io.Serializable;
import swing.com.test.test.ListPanel;
import java.awt.GridLayout;
public class ListPanelMain implements java.io.Serializable{
private JFrame frame;
* Launch the application
* @param args
public static void main(String args[]) {
try {
ListPanelMain window = new ListPanelMain();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
* Create the application
public ListPanelMain() {
initialize();
* Initialize the contents of the frame
private void initialize() {
frame = new JFrame("FileTreePanelMain");
frame.setBounds(100, 100, 900, 675);
// FieTreePanelComm ftreecomm = new FieTreePanelComm();
ListPanel ftree = new ListPanel("C:\\");
// ListAllFile ftree = new ListAllFile("C:\\");
// FileTreePanelText fileTreePanelText = new FileTreePanelText(ftreecomm);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JPanel panel = new JPanel();
panel.setLayout(new GridLayout(0, 2));
frame.getContentPane().add(panel, BorderLayout.CENTER);
// final JSplitPane splitPane = new JSplitPane();
// frame.getContentPane().add(splitPane, BorderLayout.CENTER);
// splitPane.setLeftComponent(ftree);
panel.add(ftree);
final ListRightPanel listRightPanel = new ListRightPanel(ftree);
//splitPane.setRightComponent(listRightPanel);
panel.add(listRightPanel);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
frame.pack();
frame.setVisible(true);
}[2] Program 2
package swing.com.test.test;
//File System Tree
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.io.File;
import java.util.Iterator;
import java.util.Vector;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import javax.swing.JTree;
import javax.swing.JPanel;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import java.io.Serializable;
public class ListPanel extends JPanel implements Serializable{
protected JTree fileTree;
private FileSystemModel fileSystemModel;
private JTextArea ltextArea = new JTextArea();
protected JTextArea fileDetailsTextArea = new JTextArea();
private String str = "";
public String getlTextArea() {
//textArea.getText();
return str;
public String setlTextArea(String ta) {
ltextArea.setText(ta);
str = ta;
return str;
public ListPanel(String directory) {
//super("JTree FileSystem Viewer");
setLayout(new BorderLayout());
final JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
add(panel, BorderLayout.CENTER);
fileDetailsTextArea.setEditable(false);
fileSystemModel = new FileSystemModel(new File(directory));
fileTree = new JTree(fileSystemModel);
fileTree.setEditable(true);
fileTree.addTreeSelectionListener(new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent event) {
System.out.println("1. What we save is: getlTextArea() =" + getlTextArea() );
File file = (File) fileTree.getLastSelectedPathComponent();
fileDetailsTextArea.setText(getFileDetails(file));
final ListRightPanel lrp = new ListRightPanel(this);
lrp.textArea.setText(getFileDetails(file));
setlTextArea(getFileDetails(file));
System.out.println("2. What we save is: getlTextArea() =" + getlTextArea() );
final JSplitPane splitPane = new JSplitPane();
panel.add(splitPane, BorderLayout.CENTER);
final JPanel panel_1 = new JPanel();
splitPane.setLeftComponent(panel_1);
panel_1.add(new JScrollPane(fileTree));
final JPanel panel_2 = new JPanel();
splitPane.setRightComponent(panel_2);
panel_2.add(new JScrollPane(fileDetailsTextArea));
setVisible(true);
private String getFileDetails(File file) {
if (file == null)
return "";
StringBuffer buffer = new StringBuffer();
if (file.listFiles()!=null){
for (int i=0; i< file.listFiles().length; i++){
buffer.append(((file.listFiles())) + "\n");
System.out.println("List all files");
return buffer.toString();
public static void main(String args[]) {
new ListPanel("c:\\");
class FileSystemModel implements TreeModel {
private File root;
private Vector listeners = new Vector();
public FileSystemModel(File rootDirectory) {
root = rootDirectory;
public Object getRoot() {
return root;
public Object getChild(Object parent, int index) {
File directory = (File) parent;
String[] children = directory.list();
return new TreeFile(directory, children[index]);
public int getChildCount(Object parent) {
File file = (File) parent;
if (file.isDirectory()) {
String[] fileList = file.list();
if (fileList != null)
return file.list().length;
return 0;
public boolean isLeaf(Object node) {
File file = (File) node;
return file.isFile();
public int getIndexOfChild(Object parent, Object child) {
File directory = (File) parent;
File file = (File) child;
String[] children = directory.list();
for (int i = 0; i < children.length; i++) {
if (file.getName().equals(children[i])) {
return i;
return -1;
public void valueForPathChanged(TreePath path, Object value) {
File oldFile = (File) path.getLastPathComponent();
String fileParentPath = oldFile.getParent();
String newFileName = (String) value;
File targetFile = new File(fileParentPath, newFileName);
oldFile.renameTo(targetFile);
File parent = new File(fileParentPath);
int[] changedChildrenIndices = { getIndexOfChild(parent, targetFile) };
Object[] changedChildren = { targetFile };
fireTreeNodesChanged(path.getParentPath(), changedChildrenIndices, changedChildren);
private void fireTreeNodesChanged(TreePath parentPath, int[] indices, Object[] children) {
TreeModelEvent event = new TreeModelEvent(this, parentPath, indices, children);
Iterator iterator = listeners.iterator();
TreeModelListener listener = null;
while (iterator.hasNext()) {
listener = (TreeModelListener) iterator.next();
listener.treeNodesChanged(event);
public void addTreeModelListener(TreeModelListener listener) {
listeners.add(listener);
public void removeTreeModelListener(TreeModelListener listener) {
listeners.remove(listener);
private class TreeFile extends File {
public TreeFile(File parent, String child) {
super(parent, child);
public String toString() {
return getName();
[3] Program 3:
package swing.com.test.test;
import java.awt.BorderLayout;
import java.io.File;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTree;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import java.io.Serializable;
public class ListRightPanel extends JPanel implements TreeSelectionListener, Serializable{
protected JTextArea textArea;
// protected ListAllFile laf;
private String str = "";
public String getlTextArea() {
//textArea.getText();
return str;
public String setlTextArea(String ta) {
str = ta;
return str;
* Create the panel
public ListRightPanel(ListPanel laff) {
super();
setLayout(new BorderLayout());
final JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
add(panel, BorderLayout.CENTER);
textArea = new JTextArea();
final String st = laff.getlTextArea();
System.out.println("####################################");
System.out.println("st=" + st);
laff.fileTree.addTreeSelectionListener(new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent event) {
//laff.textArea.setText(getFileDetails(file));
textArea.setText(getlTextArea());
System.out.println("ListRightPanel Was Invoked from ListPanel!!getlTextArea() =" + getlTextArea() );
System.out.println("st=" + st);
panel.add(textArea, BorderLayout.CENTER);
public void valueChanged(TreeSelectionEvent e){};
}You can try this one, thanks again
sunny -
Customizing JTree Nodes ImageIcons???
I have a JTree. Iam trying to customize the icons of it instead of the defaulticons available for leaf and branch nodes.I successfully set a new icon for leaf nodes by calling setLeafIcon.Also i can use setOpenIcon and setClosedIcon for the expanded and closed branches.
But in my application when my GUI is launched i actually set the JTree in its fully expansion form.
so there is no difference between setOpenICon and setClosedIcon as all of them are expanded.so how do i differentiate between the two and set different icons for both of them.
exmaple:Cricket club is my root node..I have for ex:ABC , BCD, and CDE club underneath that(branch nodes).Under each club i have player1,player2, player3. .etc..so i want to set 3 different icons,,one for cricket club, 2nd for ABC,BCD andCDE clubs and 3rd one for players.since my JTree is expanded the same icon is set for CricketClub(root Node) and ABC,BCD and CDE club(branch nodes)..How can iset different icons to these. can anyone help me on this..I am sort of new to JTree.So code snippet will be a welcome..
Thanks Much in advanceTo fully expand the tree, use the method scrollPathToVisible(TreePath path). The path is the path for your tree's last node. The DefaultMutableTreeNode class should have some methods to find the path for a particular node.
To set the icons for a particular node, depending on their opened or closed state, Make a subclass of TreeCellRenderer. If you look at the API for TreeCellRenderer, you will see that it will tell you if the current node is expanded, selected, leaf, hasfocus, etc...
If you want to set an open icon for an expanded node, just check if it is expanded. Cast the Object value to a DefaultMutableTreeNode and set the Icon for it, unless you have your own class for your nodes. Lastly, set your renderer for your JTree with setCellRenderer(TreeCellRenderer ren). I hope this helps. -
JTree DefaultMutableTreeNode Coloring
hi
i am facing a problem.I want to create root node with different color anf font and its child node with different color and font.When I change the color of my tree the whole tree nodes are given the same color.Is there any way in which i can color different nodes in the tree with different colors and font?hello here is some comdesnippet howto create you're own
class MyRenderer extends JLabel implements TreeCellRenderer
ImageIcon rootIcon ;
ImageIcon dirIcon;
Font font10 = new Font("Helvetica", Font.PLAIN ,10);
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boolean expanded,
boolean leaf,
int row,
boolean hasFocus)
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setEnabled(tree.isEnabled());
if( isEnabled(value))
if (sel){
// this.setForeground(new Color(57,90,70));
this.setForeground(new Color(255,0,0));
this.setBackground(new Color(255,2,0));
else
this.setForeground(new java.awt.Color(16, 49, 74));
else
this.setForeground(Color.red);
setFont(font10);
setText(tree.convertValueToText(value, sel, expanded, leaf, row, hasFocus));
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if (leaf)
greetings Sven -
How can i distinguish between set or tuples from incoming filters in a calculation
How can i distinguish between set or tuples from incoming filters in a calculation. i am using descendants function with the leaves option to calculate some project revenue cause there is different calcuation method on sub projects the sum on the main project
should reflect the sum of the sub project with all different methods.
this works fine until i try to select 2 sub projects at the same time. i am getting the standard currentset dosnt work cause its a set.
is there i way i can check if its a multiple select or not and handle it a different wayHi,
Check the following link about Multi Select Calculations written by Mosha.
http://sqlblog.com/blogs/mosha/archive/2007/01/13/multiselect-friendly-mdx-for-calculations-looking-at-current-coordinate.aspx
Best regards...
Chandima Lakmal Fonseka -
Distinguishing between two instances of the same portlet
Hi Experts,
Is there a way to distinguish between two instance of the same portlet in different browser windows?
I'm looking for something like URL parameter passing, but just for portlets.
The problem is, I want a way to pass a parameter between views in a portlet, but in such a way that if another browser window is opened and navigated to that portlet page, the parameter won't be the same. Perhaps I can explain better with this example:
Page A has a portlet on it which has a textbox and 2 buttons - the first button stores the value in the textbox in the PortletRequest (or PortletURL) and if you click the second button the portlet navigates to a different view which displays the value. If I navigate with a second browser window to Page A, however, and only click the navigate button, that value which was stored by the first instance of the portlet will still be shown. I want them to be independent, I don't want changes in the one's PortletRequest to reflect in the other one's PortletRequest.
Any ideas?
Thanks,
JPWhy not use two instances of the same portlet, i.e. create two channels of the same portlet.
The behave the same, have the same application logic, so all you need is to transfer informations between the two portlets.If you want this within user space use the portlet session, otherwise access the http session context /application context and store the data there.
The behavior would be controlled by the portlet preferences, so channel a (instance 1) would be configured to run as controller and channel b (instance 2) would be configured as receiver.
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