Name: skT88420 Date: 01/24/2000


java version "1.3beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3beta-O)
Java(TM) HotSpot Client VM (build 1.3beta-O-release, 1.3beta-O-release,
interpreted mode)


This is an RFE. It is possible with minimal customization to provide a per-node
tooltip for JTree and a per-cell tooltip for JTable, but it is not possible
(AFAICT) to provide a per-item tooltip for JList without subclassing JList.
This behavior is inconsistent and requires a user of the Swing library to
implement code that really belongs in JList itself.

Steps to reproduce -

1. Compile TTT.java
2. Run it under jdk1.3 beta
3. Hover the mouse pointer over a tree node - the tooltip appears as expected
4. Hover the mouse pointer over a list item - the tooltip does not appear

/* Begin TTT.java */

import java.awt.*;
import javax.swing.*;
import javax.swing.tree.*;

public class TTT
{
        static class MyTreeRenderer extends DefaultTreeCellRenderer
        {
                public Component getTreeCellRendererComponent (JTree tree,
                        Object value, boolean selected, boolean expanded,
                        boolean leaf, int row, boolean focus)
                {
                        Component comp = super.getTreeCellRendererComponent
                                (tree, value, selected, expanded, leaf, row,
focus);
                        setToolTipText (value.toString ());
                        return comp;
                }
        }

        static class MyListRenderer extends DefaultListCellRenderer
        {
                public Component getListCellRendererComponent (JList list,
                        Object value, int index, boolean selected, boolean
focus)
                {
                        Component comp = super.getListCellRendererComponent
                                (list, value, index, selected, focus);
                        setToolTipText (value.toString ());
                        return comp;
                }
        }

        public static void main (String[] args)
        {
                TTT tt = new TTT ();
        }

        JFrame frame;
        JTree tree;
        JList list;
        JSplitPane splitter;

        public TTT ()
        {
                frame = new JFrame ("Tool Tip Test");
                frame.setDefaultCloseOperation (frame.EXIT_ON_CLOSE);

                list = new JList (new String[] {"One", "Two", "Three", "Four"});
                list.setCellRenderer (new MyListRenderer ());

                tree = new JTree ();
                tree.setCellRenderer (new MyTreeRenderer ());

                ToolTipManager.sharedInstance ().registerComponent (list);
                ToolTipManager.sharedInstance ().registerComponent (tree);

                splitter = new JSplitPane (JSplitPane.HORIZONTAL_SPLIT,
                        new JScrollPane (tree), new JScrollPane (list));

                frame.getContentPane ().add (splitter);

                frame.setSize (400, 400);
                frame.setVisible (true);
        }
}

/* End TTT.java */
(Review ID: 100313)
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