Re: dynamic tool tip text

From:

Knute Johnson <nospam@rabbitbrush.frazmtn.com>

Newsgroups:

comp.lang.java.programmer

Date:

Thu, 18 Mar 2010 10:16:51 -0700

Message-ID:

<7eton.11431$%H1.7959@newsfe23.iad>

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);
             }
         });
     }
}

--

Knute Johnson
email s/nospam/knute2010/