Re: dynamic tool tip text

From:
Knute Johnson <nospam@rabbitbrush.frazmtn.com>
Newsgroups:
comp.lang.java.programmer
Date:
Thu, 18 Mar 2010 18:58:53 -0700
Message-ID:
<xTAon.88661$K81.6532@newsfe18.iad>
On 3/18/2010 12:11 PM, Jim Janney wrote:

Knute Johnson<nospam@rabbitbrush.frazmtn.com> writes:

From: Knute Johnson<nospam@rabbitbrush.frazmtn.com>
Subject: Re: dynamic tool tip text
Newsgroups: comp.lang.java.programmer
Date: Thu, 18 Mar 2010 10:16:51 -0700
Organization: NewsDemon

On 3/18/2010 9:32 AM, Jim Janney wrote:

Thanks. That still doesn't work with a JComboBox, but that turns out
to be because nothing works with JComboBoxes, as is copiously
described in bug ID 4144505, where Sun says "yes we know, but we're
not going to fix it."


Sure it does.

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

public class test extends JPanel {
     String[] items = {"One","Two","Three","Four","Five"};

     public test() {
         super(new GridBagLayout());

         setPreferredSize(new Dimension(400,300));

         JComboBox b = new JComboBox(items);
         b.addMouseListener(new MouseAdapter() {
             public void mouseEntered(MouseEvent me) {
                 JComponent c = (JComponent)me.getSource();
                 if (me.isAltDown())
                     c.setToolTipText("ALT is pressed");
                 else
                     c.setToolTipText("ALT isn't pressed!");

             }
         });
         add(b);
     }

     public static void main(String[] args) {
         EventQueue.invokeLater(new Runnable() {
             public void run() {
                 JFrame f = new JFrame();
                 f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                 test t = new test();
                 f.add(t);
                 f.pack();
                 f.setVisible(true);
             }
         });
     }
}


More precisely, it works on the editor but not on the button.

To be somewhat less unfair to Sun, I did find some discussion of this at

http://java.sun.com/docs/books/tutorial/uiswing/components/combobox.html#listeners


I tried this on Windows with 1.6.0_18. It works on both the box and the
arrow button. What OS and Java are you running?

--

Knute Johnson
email s/nospam/knute2010/

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