JDK-4373575 : html labels vanish from JTree with Windows L&F
  • Type: Bug
  • Component: client-libs
  • Sub-Component: javax.swing
  • Affected Version: 1.3.0
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • OS: windows_nt
  • CPU: x86
  • Submitted: 2000-09-24
  • Updated: 2000-11-17
  • Resolved: 2000-11-17
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1.4.0 betaFixed

Name: krC82822			Date: 09/24/2000

24 Sep 2000, eval1127@eng -- reproducible on NT 4.0, with 1.3.0-C, with Win L&F (works fine under Metal).  Couldn't find existing bug covering this issue.  

D:\jb\src>java -version
java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
Java HotSpot(TM) Client VM (build 1.3.0-C, mixed mode)

Html format labels in JTree with the Windows look and feel vanish when you
click on the lable above. To reproduce, run the attached Java application and
click on the JTree nodes labelled "three", "two", and "one", in that order.

import java.awt.Container;
import javax.swing.tree.DefaultMutableTreeNode;
import java.awt.GridLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTree;
import javax.swing.UIManager;
/** Check out tree, because we seem to lose labels with the Windows look and
feel */
class SimpleTree
  private static String block(String s)
    return "<html>" + s + "</html>";
  public static void main(String[] s) throws Exception
    System.err.println("To reproduce, click on the nodes marked three, two, one
in that order");
    JFrame jf = new JFrame();
    DefaultMutableTreeNode top = new DefaultMutableTreeNode(block("top"));
    DefaultMutableTreeNode one = new DefaultMutableTreeNode(block("one"));
    one.add(new DefaultMutableTreeNode(block("oneChild")));
    DefaultMutableTreeNode two = new DefaultMutableTreeNode(block("two"));
    two.add(new DefaultMutableTreeNode(block("twoChild")));
    DefaultMutableTreeNode three = new DefaultMutableTreeNode(block("three"));
    three.add(new DefaultMutableTreeNode(block("threeChild")));
    JTree jt = new JTree(top);  // same results with "new JTree(new DefaultTreeModel(top))"
    Container cp = jf.getContentPane();
(Review ID: 109724) 

CONVERTED DATA BugTraq+ Release Management Values COMMIT TO FIX: merlin-beta FIXED IN: merlin-beta INTEGRATED IN: merlin-beta

WORK AROUND Explicitly set the font of the Renderer. scott.violet@eng 2000-10-26

EVALUATION This is happening because of DefaultTreeCellRenderer's special handling of its font. It basicly keeps the font null, unless expclitly set. The font from the JTree is then normally picked up do to the containment hierarchy. But the html support uses the font from the component, and only looks it up once (this normally isn't a problem as the html is normally updated when the font changes (renderers override firePropertyChangeEvent)) so that in certain situations the font looked up is null, and thus causes this wierd font change behavior. scott.violet@eng 2000-10-26