Problem using DefaultTreeCellRenderer

[claude jones]

Hello,
I am trying to set a JTree to have a window's look and feel. Using the following:

    public static void setLookNFeel(String lookNFeel, JFrame frame) {
        if(lookNFeel != null && frame != null) {
            try {
                UIManager.setLookAndFeel(lookNFeel);                
                SwingUtilities.updateComponentTreeUI(frame);
            } catch(UnsupportedLookAndFeelException ex1) {
                System.err.println("Unsupported LookAndFeel: " + lookNFeel);
            } catch(ClassNotFoundException ex2) {
                System.err.println("LookAndFeel class not found: " + lookNFeel);
            } catch(InstantiationException ex3) {
                System.err.println("Could not load LookAndFeel: " + lookNFeel);
            } catch(IllegalAccessException ex4) {
                System.err.println("Cannot use LookAndFeel: " + lookNFeel);
            }
        }
    }

However, when I add the following code to remove the leafIcon, the look and feel changes to the Java Look and Feel.

...
DefaultTreeCellRenderer renderer = 
                        new DefaultTreeCellRenderer();        
renderer.setLeafIcon(null);
tree.setCellRenderer(renderer);

If I remove the code above the application uses the window's look and feel. Any ideas of what I need to do to maintain a consistent window's look and feel.

Below is the complete code:

package com.app;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
import com.app.framework.BasicWindowMonitor;
import com.app.framework.FrameworkUtil;
public class TreeExample extends JFrame {
    public TreeExample() {
        super("Tree Example");
        this.addWindowListener(new BasicWindowMonitor());
        this.setSize(600,400);
        DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root Node");
        // Set Claude's family branch
        DefaultMutableTreeNode claude = new DefaultMutableTreeNode("Johnson Family");
        DefaultMutableTreeNode member = new DefaultMutableTreeNode("Steve Johnson");
        claude.add(member);
        member = new DefaultMutableTreeNode("Connie Johnson");
        claude.add(member);
        member = new DefaultMutableTreeNode("Claude Jones");
        claude.add(member);
        member = new DefaultMutableTreeNode("Steve Johnson Jr.");
        claude.add(member);
        member = new DefaultMutableTreeNode("Kevin Johnson");
        claude.add(member);
        member = new DefaultMutableTreeNode("Daniel Johnson");
        claude.add(member);
        root.add(claude);
        DefaultMutableTreeNode becca = new DefaultMutableTreeNode("Rotsart Family");
        member = new DefaultMutableTreeNode("Steve Rotsart");
        becca.add(member);
        member = new DefaultMutableTreeNode("Ria Rotsart");
        becca.add(member);
        member = new DefaultMutableTreeNode("Steve Rotsart Jr.");
        becca.add(member);
        member = new DefaultMutableTreeNode("Rebecca Rotsart");
        becca.add(member);
        member = new DefaultMutableTreeNode("Nick Rotsart");
        becca.add(member);
        root.add(becca);
        // Create JTree and tree view
        final JTree tree = new JTree(root);
        tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
        tree.putClientProperty("JTree.lineStyle", "Angled");
        // Remove leaf icon from tree
        DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();        
        renderer.setLeafIcon(null);
        tree.setCellRenderer(renderer);
        JScrollPane treeView = new JScrollPane(tree);
        // Add tree to JFrame
        this.getContentPane().add(treeView, BorderLayout.WEST);
    }
    public static void main(String[] args) {
        TreeExample app = new TreeExample();
        FrameworkUtil.setLookNFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel", app);
        app.setVisible(true);
    }
}

[This message has been edited by claude jones (edited December 19, 2001).]

[claude jones]

I get the same problem with the look and feel changing from window's to Java when I create my own custom renderer:

    class MyRenderer extends DefaultTreeCellRenderer {
        /**
          * Configures the renderer based on the passed in components.
          * The value is set from messaging the tree with
          * <code>convertValueToText</code>, which ultimately invokes
          * <code>toString</code> on <code>value</code>.
          * The foreground color is set based on the selection and the icon
          * is set based on on leaf and expanded.
          */
        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);
               if(leaf) {
                    this.setLeafIcon(null);
               }
            return this;
        }
    }

Any ideas?

[claude jones]

I fixed my problem. I have to set the look and feel before I start adding components to my JFrame.
Thanks.
cj