Name: jk109818 Date: 01/15/2003


FULL PRODUCT VERSION :
java version "1.4.0_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0_01-b03)
Java HotSpot(TM) Client VM (build 1.4.0_01-b03, mixed mode)

java version "1.4.1_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1_01-b01)
Java HotSpot(TM) Client VM (build 1.4.1_01-b01, mixed mode)


FULL OPERATING SYSTEM VERSION :
Microsoft Windows XP [Version 5.1.2600]

ADDITIONAL OPERATING SYSTEMS :
Should be applicable to all OSs

A DESCRIPTION OF THE PROBLEM :

To drag an object from a JList it is required that the
object is first selected, then, in a second mouse gesture,
dragged. This is contrary to the expected user experience
(e.g. in Windows Explorer) where you can select and drag
in a single gesture. Not that the list selection event
should not be fired until MOUSE UP to enable dragging an
object to another pane that might switch contents due to a
list selection event (c.f. the tree and directory panes of
Windows Explorer).

This is a duplicate of 4425334 which should not have been
closed.

This IS a bug, even if by design! Compare this with Windows,
where you can click and drag an object in a list which was
not previously the selection.


STEPS TO REPRODUCE:
1) Compile the below code and execute it.
2) Press LEFT mouse button on a non-selected item of JList.
3) Start dragging without releasing the mouse button.

You will see that nothing gets dragged.



SOURCE CODE:

import javax.swing.*;
import javax.swing.plaf.basic.*;

import java.awt.*;
import java.awt.event.*;
import java.util.*;

public class BugWithDnDSwing extends JFrame {

JPanel panel;

private JTextField tfSource;
private JTextField tfDest;

private JList listSource;
private JList listDest;

public BugWithDnDSwing() {
super("BugWithDnDSwing");
setSize(400,400);
panel = new JPanel();
panel.setLayout( null );

tfDest = new JTextField();
tfDest.setBounds(150,40,100,20);
panel.add(tfDest);

String[] data = {"one", "two", "three", "four"};
listSource = new JList(data);
listSource.setBounds(10,40,100,60);
listSource.setDragEnabled(true);
panel.add(listSource);

panel.setVisible(true);
getContentPane().add(panel);
setVisible(true);

addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent ae) {
System.exit(0);
}
});
}

public static void main(String[] args) {
new BugWithDnDSwing();
}
}




REPRODUCIBILITY :
This bug can be reproduced always.
(Review ID: 178852)
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