Rendered Nodes in JTree, Look&Feel Problem

Hallo,
I make a small JTree and write my own TreeNodeRenderer which renders in each case a simple JPanel with Titled-Border an 2 JLabels.
If I adjust Metal Look&Feel the rendered Nodes are displayed correctly. (The JPanels size is about 300x200 pixels)
With other L&Fs (windows, motif, plastic from jgoodies) there is only the title of the TitledBorder displayed.
I meet the Problem as i programmed a more complicated JTree with rendered TreeNodes.
Do you know the problem and a solution? I don't want to setting up Metal look for my application.
The following link contains the source of the example in an executable jar file:
http://home.arcor.de/Thomas-Pfaff/treetest.jar
thanks for all answers

I found the answer of my question....
http://onesearch.sun.com/search/clickthru?qt=TreeCellRenderer&url=http%3A%2F%2Fbugs.sun.com%2Fbugdatabase%2Fview_bug.do%3Fbug_id%3D4656280&pathInfo=%2Fonesearch%2Findex.jsp&hitNum=1&col=support-all

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Ron
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import java.awt.Color;
import java.awt.Component;
import java.util.Enumeration;
import java.util.NoSuchElementException;
import javax.swing.Icon;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
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when i select a node the the method "getTreeCellRendererComponent"
start to run on the entire tree from buttom to top and than from top to buttom.
for me it waste of time because if has say 100 nodes it wont botthers me.
but i have 20000 nodes and more its take a time.
and for all this nodes i have to make compares.
is there a way to force the DefaultTreeCellRenderer to not run the entire tree???
Thanks

You need to make sure that your TreeModel interprets your group nodes to be non-leaf nodes (one of the methods in the TreeModel interface is called isLeaf). If you are using a DefaultTreeModel with DefaultMutableTreeNode objects, you can use the askAllowsChildren property of DefaultTreeModel and the allowsChildren property of DefaultMutableTreeNode to control this. See the API for more details:
http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/tree/DefaultTreeModel.html
http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/tree/DefaultMutableTreeNode.html

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Message was edited by:
cbios

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null
Message was edited by:
Olek

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for(int i = 0, n = lookAndFeelDefinitions.length; i < n; i++) {
if(newLAF.equals(lookAndFeelDefinitions.getDefinitionLabel())) {
lookAndFeelId = lookAndFeelDefinitions[i].getLookAndFeelDefinitionId();
break;
di.setLookAndFeelDefinitionId(lookAndFeelId);
ShellDefinitionManager shellManager = PortalBeanManager.getShellDefinitionManager();
ShellDefinitionId shellId = null;
ShellDefinition[] shellDefinitions = getShellDefinitions(webAppName, request.getLocale(), request);
for(int i = 0, n = shellDefinitions.length; i < n; i++) {
String shellName = shellManager.getShellView(customizationContext, shellDefinitions[i].getShellDefinitionId()).getMarkupView().getMarkupDefinition().getName();
if(newShell.equals(shellName)) {
shellId = shellDefinitions[i].getShellDefinitionId();
break;
di.setShellDefinitionId(shellId);
PortalBeanManager.getPortalCustomizationManager().updateDesktopInstance(customizationContext, di);
This works just fine, but I once the portal renders itself in my
browser, I usually have to refresh the page before the changes to the
shell and look & feel are visible. I would like to do this in the
init() method of the backing file but I do not know how to determine
the current active page from within init.
I would appreciate any help you all could give me in finding a solution
so I do not have to refresh the page in order to see the shell and look
& feel changes. Thanks in advance!
Andy

We essentially have 2 "portals" running inside 1 .portal file. We'd
like to be able to use single sign on and entitlements to allow/restrict
access to various parts of the 2 portals (where certain books are
consider part of portal "A" and others part of portal "B"). If you are
logged in as a super-user, you will be able to access everything. If
you are logged in as user type "A" you can only access portal "A," and
similarly for user type "B" and portal "B."
Portals A and B have each have a distinct header, footer (i.e. shell),
and look and feel (skeleton and skin). If a super-user is looking at
portal A, the portal should have portal A's header, footer, and look and
feel, and similarly for portal B.
How would you recommend we accomplish this? Would it make more sense
(and is it possible) to have the header and footer jsps determine what
content to render based on the current book or page, and then use the
code you suggested below to change the look and feel dynamically?
Thanks,
Andy
jolleyc wrote:
in order to pick up the changes for that request you will need to do a redirect back to the server (our login examples shwo you how to do this). this is because the control tree has already been retrieved from the database (so you need to go back and get a new version).
I quick note: If you plan on doing this a lot this is quite a heavy process. if you just need to change the lookAndFeel on the fly you can look at the following ( i t think this is in the tutorial portal)
A) Modify the shell to include a jsp and backing file
<netuix:header>
<netuix:jspContent backingFile="com.acme.DynamicLookAndFeelHeaderBacking" contentUri="/portlets/lookAndFeel/dynamicLookAndFeelHeader/dynamicLookAndFeelHeader.jsp"/>
</netuix:header>
B) backing file looks like
public void init(HttpServletRequest request, HttpServletResponse response)
// Get the session from the request
HttpSession session = request.getSession();
// Get the LookAndFeel object from the PrimaryTheme in the request
LookAndFeel lookAndFeel = LookAndFeel.getLookAndFeel(request);
if (request.getParameter("defaultButton") != null)
session.setAttribute("skin", "default");
if (request.getParameter("textButton") != null)
session.setAttribute("skin", "text");
if (request.getParameter("classicButton") != null)
session.setAttribute("skin", "classic");
String selectedSkin = (String) session.getAttribute("skin");
if (selectedSkin != null)
lookAndFeel.setSkin(selectedSkin);
lookAndFeel.setSkeleton(selectedSkin);
lookAndFeel.reinit();

Unable to update nodes in JTree

Hi all,
I have a JTree, which I have passed in a DefaultMutableTreeNode in the constructor. I have added 3 elements inside this "root". So the JTree looks like this :
Root
->Element 1
->Element 2
->Element 3
However, when I want to actually delete these 3 nodes and add in another 2 nodes, it doesn't work for me, a sample :
//JTree which is created, using DefaultMutableTreeNode
DefaultMutableTreeNode node = new DefaultMutableTreeNode("Root");
//add 3 nodes inside first
node.add(new DefaultMutableTreeNode("Element 1"));
node.add(new DefaultMutableTreeNode("Element 2"));
node.add(new DefaultMutableTreeNode("Element 3"));
JTree jtree = new JTree(node);
//get the root (which has 3 elements now)
DefaultMutableTreeNode rootNode = (DefaultMutableTreeNode)jtree.getModel().getRoot();
//delete the 3 elements
rootNode.removeAllChildren();
//then add in another 2 more nodes
rootNode.add(new DefaultMutableTreeNode("New Element 1"));
rootNode.add(new DefaultMutableTreeNode("New Element 2"));
The jtree created does display the first 3 elements, however when after adding in 2 more new elements, the tree doesnt change.
Any tips and comments will be greatly appreciated! Thanks.

Oops, yeah. My mistake was, The tree should have a model, instead of just nodes connecting to nodes... that's why it wasnt able to update... i've should used a model from the start. its the correct way isnt it :) i can continue my project now .. thanks all

[JProgressBar][Look&feel] Change the color

I want to change the color of my JProgressBar :
I have tried :
UIManager.put("ProgressBar.foreground", new ColorUIResource(255, 0, 0));
progressBar.updateUI();
and
progressBar.setForeground(Color.RED);[b]
When I use the default look&feel, it works but with a custom look&feel (com.birosoft.liquid.LiquidLookAndFeel), the color isn't changed.
Does anybody has an idea ?
thanks in advance
sylvain_2020

hi,
you're right but when I do :
<b>this.progressBar.setForeground(Color.RED);
this.progressBar.updateUI();</b>
Nothing changes. I found that the probleme comes from the look & feel that I used since the color is changed when I don't specify any look and feel ...
Do you know how I could resolve this ?
Sylvain

Getting incorrect JComboBox color through UIManager in Nimbus Look&Feel

Hello all,
As I implementing a multi columns JComboBox, I need to provide my own custom ListCellRenderer.
* @author yccheok
public class ResultSetCellRenderer extends javax.swing.JPanel implements ListCellRenderer {
    // Do not use static, so that our on-the-fly look n feel change will work.
    private final Color cfc = UIManager.getColor("ComboBox.foreground");
    private final Color cbc = UIManager.getColor("ComboBox.background");
    private final Color csfc = UIManager.getColor("ComboBox.selectionForeground");
    private final Color csbc = UIManager.getColor("ComboBox.selectionBackground");
    private final Color cdfc = UIManager.getColor("ComboBox.disabledForeground");
    @Override
    public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
        System.out.println("UIManager.getColor(ComboBox.selectionForeground) = " + UIManager.getColor("ComboBox.selectionForeground"));
        System.out.println("UIManager.getColor(ComboBox.selectionBackground) = " + UIManager.getColor("ComboBox.selectionBackground"));
        this.setBackground(isSelected ? csbc : cbc);
     this.setForeground(isSelected ? csfc : cfc);
        jLabel1.setBackground(isSelected ? csbc : cbc);
     jLabel1.setForeground(isSelected ? csfc : cfc);
        jLabel2.setBackground(isSelected ? csbc : cbc);
     jLabel2.setForeground(isSelected ? csfc : cfc);
        jLabel3.setBackground(isSelected ? csbc : cbc);
     jLabel3.setForeground(cdfc);
        final ResultType result = (ResultType)value;
        jLabel1.setText(result.symbol);
        jLabel2.setText(result.name);
        final String type = result.typeDisp != null ? result.typeDisp : result.type;
        final String exch = result.exchDisp != null ? result.exchDisp : result.exch;
        jLabel3.setText(type + " - " + exch);
        return this;
}I try to get the selection colors of JComboBox through UIManager.
    private final Color csfc = UIManager.getColor("ComboBox.selectionForeground");
    private final Color csbc = UIManager.getColor("ComboBox.selectionBackground");However, I realize that while I am in Nimbus Look & Feel, the above 2 return me null.
May I know is there any workaround to overcome this? Or I had missed out something?
Thanks.
Edited by: yccheok on Oct 21, 2010 10:39 AM

because "c" is instance of UIResource:
import java.awt.*;
import javax.swing.*;
import javax.swing.plaf.*;
public class NimbusComponentColorTest {
public JComponent makeUI() {
    final Color c = UIManager.getColor(
        "ComboBox:\"ComboBox.renderer\"[Selected].background");
    System.out.format("c instanceof UIResource: %s", c instanceof UIResource);
    JLabel label01 = new JLabel("label01");
    /* //com/sun/java/swing/plaf/nimbus/AbstractRegionPainter.java
    protected final Color getComponentColor(...) {
      // we return the defaultColor if the color found is null, or if
      // it is a UIResource. This is done because the color for the
      // ENABLED state is set on the component, but you don't want to use
      // that color for the over state. So we only respect the color
      // specified for the property if it was set by the user, as opposed
      // to set by us.
      if (color == null || color instanceof UIResource) {
          return defaultColor;
      } else if(saturationOffset!=0||brightnessOffset!=0||alphaOffset!=0) {
    label01.setOpaque(true);
    label01.setBackground(c);
    JLabel label02 = new JLabel("label02");
    label02.setOpaque(true);
    label02.setUI(new javax.swing.plaf.metal.MetalLabelUI());
    label02.setBackground(c);
    JLabel label03 = new JLabel("label03") {
      @Override public void paintComponent(Graphics g) {
        g.setColor(c);
        g.fillRect(0,0,getWidth(),getHeight());
        super.paintComponent(g);
    JLabel label04 = new JLabel("label04");
    label04.setOpaque(true);
    label04.setBackground(new ColorUIResource(Color.RED));
    JPanel p = new JPanel();
    p.add(label01); p.add(label02); p.add(label03); p.add(label04);
    return p;
public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
      @Override public void run() { createAndShowGUI(); }
public static void createAndShowGUI() {
    try {
      for (UIManager.LookAndFeelInfo laf:UIManager.getInstalledLookAndFeels())
        if ("Nimbus".equals(laf.getName()))
          UIManager.setLookAndFeel(laf.getClassName());
    } catch (Exception e) {
      e.printStackTrace();
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    f.getContentPane().add(new NimbusComponentColorTest().makeUI());
    f.setSize(200, 100);
    f.setLocationRelativeTo(null);
    f.setVisible(true);
}

Rendered Nodes in JTree, Look&Feel Problem

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