Name: jk109818 Date: 10/28/2002


FULL PRODUCT VERSION :
java version "1.4.1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-b21)
Java HotSpot(TM) Client VM (build 1.4.1-b21, mixed mode)



FULL OPERATING SYSTEM VERSION :
Microsoft Windows 2000 [Version 5.00.2195]

A DESCRIPTION OF THE PROBLEM :
Adding a mouselistener to the JScrollPane's viewport causes
the JScrollPane not to display its tooltip.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1.compile and run the example program
2.check that the bottom part of table (jscrollpane) has no
tooltip
3.uncomment the 2 commented lines in code
4.recompile and run
5.check that the bottom part of table (jscrollpane) now has
the tooltip

EXPECTED VERSUS ACTUAL BEHAVIOR :
The JScrollPane should have the tooltip displayed on both
occasions. It is only displayed when you have not added a
mouselistener to the viewport.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import java.awt.Component;
import java.awt.Container;
import java.awt.HeadlessException;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseListener;
import java.util.Vector;

public class JScrollPaneToolTipTest extends JFrame {
public JScrollPaneToolTipTest() throws HeadlessException {
super("test");
Vector rows = new Vector();
Vector cols = new Vector();
JPanel panel = new JPanel();
cols.add("a");
cols.add("b");
JTable table = new JTable(rows, cols);
JScrollPane pane = new JScrollPane(table);
pane.setToolTipText("jscrollpane tooptip");
panel.add(pane);
getContentPane().add(panel);
addMouseListenerToChildren(this, new DummyMouseListener());
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack();
setVisible(true);
}

public void addMouseListenerToChildren(Component parent, MouseListener
l) {
if (parent instanceof Container == true) {
Container container = (Container) parent;
Component[] components = container.getComponents();
for (int i = 0 ; i < components.length ; i++) {
Component component = components[i];
addMouseListenerToChildren(component, l);
}
}
// if (parent instanceof JViewport == false) {
parent.addMouseListener(l);
// }
}

public static void main(String[] args) {
JScrollPaneToolTipTest test = new JScrollPaneToolTipTest();
}

private class DummyMouseListener extends MouseAdapter {
}
}

---------- END SOURCE ----------

CUSTOMER WORKAROUND :
Check that you never add a mouselistener to the viewport.
(Review ID: 165281)
======================================================================
This contribution from java.net member leouser


A DESCRIPTION OF THE FIX :
BUGID: 4769783 Adding a mouselistener to JScrollPanes viewport cause the pane to lose tooltip
FILES AFFECTED: javax.swing.JScrollPane
JDK VERSION
jdk-6-rc-bin-b64-linux-i586-15_dec_2005.bin

This should be closed:

Discusion(embeded in test case as well):
/**
 * BUGID: 4769783 Adding a mouselistener to JScrollPanes viewport cause the pane to lose tooltip
 * This bug apparently does not exist anymore. The synopsis that adding a MouseListener
 * to the viewport will block MouseEvents from trickling down to the proper
 * component appears to be no longer correct. Everything appears to work! :D
 *
 * To see the JScrollPane tooltip in effect you have to go the edges to get it.
 * If your off a little it won't show. The JTable shows to... so their
 * isn't any blocking by the JViewport.
 *
 * So: Close this baby!!!!
 *
 * FILES AFFECTED: javax.swing.JScrollPane
 *
 * JDK VERSION
 * jdk-6-rc-bin-b64-linux-i586-15_dec_2005.bin
 *
 * test ran succesfully on a SUSE 7.3 Linux distribution
 *
 * Brian Harry
 * ###@###.###
 * Jan 23, 2006
 */

JUnit TESTCASE :
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import static java.lang.System.*;

/**
 * BUGID: 4769783 Adding a mouselistener to JScrollPanes viewport cause the pane to lose tooltip
 * This bug apparently does not exist anymore. The synopsis that adding a MouseListener
 * to the viewport will block MouseEvents from trickling down to the proper
 * component appears to be no longer correct. Everything appears to work! :D
 *
 * To see the JScrollPane tooltip in effect you have to go the edges to get it.
 * If your off a little it won't show. The JTable shows to... so their
 * isn't any blocking by the JViewport.
 *
 * So: Close this baby!!!!
 *
 * FILES AFFECTED: javax.swing.JScrollPane
 *
 * JDK VERSION
 * jdk-6-rc-bin-b64-linux-i586-15_dec_2005.bin
 *
 * test ran succesfully on a SUSE 7.3 Linux distribution
 *
 * Brian Harry
 * ###@###.###
 * Jan 23, 2006
 */
public class MListen4769783 implements Runnable{



    public void run(){

JFrame jf = new JFrame();
Object[][] data = new Object[1000][10];
        Object[] names = new Object[10];
        for(int i = 0; i<1000; i++){
for(int i2 = 0; i2 <10; i2++)
                data[i][i2] = i2;
        }
for(int i = 0; i < 10; i++)
            names[i] = String.valueOf(i);

JTable jtable = new JTable(data, names);
        jtable.setToolTipText("I AM JTABLE!!!");
        JScrollPane jsp = new JScrollPane(jtable);
        jsp.setToolTipText("Mooooo");
//out.println(jsp.getViewport());
        JPanel jp = new JPanel();
        jp.add(jsp);
        jf.add(jp);
        jf.pack();
        jf.setVisible(true);
        for(Component c: jsp.getComponents()){
out.println(c);
            c.addMouseListener(new DummyMouseListener(c));
        }
        jsp.addMouseListener(new DummyMouseListener(jsp));

    }

    private static class DummyMouseListener extends MouseAdapter{
        
        Component c;
        public DummyMouseListener(Component c){
            this.c = c;
        }
        @Override
public void mouseEntered(MouseEvent me){
out.println("MOUSE ENTERED!!! for:\n");
out.println(c);
        }
        @Override
        public void mouseClicked(MouseEvent me){
            out.println("MOUSE CLICKED!!! for:\n");
            out.println(c);
        }
        @Override
        public void mouseExited(MouseEvent me){
out.println( "MOUSE EXITED!!! for:\n");
            out.println(c);
        }
        @Override
        public void mousePressed(MouseEvent me){
            out.println( "MOUSE PRESSED!!! for:\n");
out.println(c);
        }
        @Override
        public void mouseReleased(MouseEvent me){
            out.println( "MOUSE RELEASED!!! for:\n");
out.println(c);
        }
    }

    public static void main(String ... args){
SwingUtilities.invokeLater(new MListen4769783());
    }
}


FIX FOR BUG NUMBER:
4769783