Name: vi73552 Date: 03/09/99


This demonstrates a bug in java 1.2 DnD on Windows NT.
Move the mouse pointer to a tree node, press <Ctrl>,
press left mouse button, release <Ctrl> but don't release
the mouse button, start dragging. The cursor will change
to a 'no-drop' cursor. Now release the mouse button.
The application will remain unusable (try moving or closing
the window) until you control-click.

java full version "JDK-1.2-V"
//
import java.awt.*;
import java.awt.dnd.*;
import java.awt.datatransfer.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;

import javax.swing.*;

class Bug
{
    static String expl =
    "This demonstrates a bug in java 1.2 DnD on Windows NT.\n"+
    "Move the mouse pointer to a tree node, press <Ctrl>,\n"+
    "press left mouse button, release <Ctrl> but don't release\n"+
    "the mouse button, start dragging. The cursor will change\n"+
    "to a 'no-drop' cursor. Now release the mouse button.\n"+
    "The application will remain unusable (try moving or closing\n"+
    "the window) until you control-click.";

    public static void main(String[] args)
    {
     JFrame frame = new JFrame("Java Bug");
     frame.getContentPane().setLayout(new FlowLayout());
     frame.getContentPane().add(new JTextArea(expl));
     frame.getContentPane().add(new DragTree());
     frame.pack();
     frame.setSize(400, 600);
     frame.show();
    }
}
class DragTree extends JTree implements DragGestureListener, DragSourceListener, Transferable
{
    public static final DataFlavor dataFlavor = new DataFlavor(DragTree.class, "DragTree");

    DragTree()
    {
DragSource source = DragSource.getDefaultDragSource();
        source.createDefaultDragGestureRecognizer(this, DnDConstants.ACTION_COPY_OR_MOVE, this);
    }
    public void dropActionChanged(DragSourceDragEvent
    dsde){}
    public void dragEnter(DragSourceDragEvent dsde){}
    public void dragOver(DragSourceDragEvent dsde){}
    public void dragGestureChanged(DragSourceDragEvent dsde){}
    public void dragExit(DragSourceEvent dse){}
    public void dragDropEnd(DragSourceDropEvent dsde){}
    public void dragGestureRecognized(DragGestureEvent dge)
    {
        dge.startDrag(null, this, this);
    }
    public DataFlavor[] getTransferDataFlavors()
    {
        DataFlavor[] flavors = new DataFlavor[1];
        
        flavors[0] = dataFlavor;

        return flavors;
    }
    public boolean isDataFlavorSupported(DataFlavor flavor)
    {
        return flavor.equals(dataFlavor);
    }
    public Object getTransferData(DataFlavor flavor)
            throws UnsupportedFlavorException, IOException
    {
        return "aap";
    }
}
(Review ID: 55135)
======================================================================

Name: krT82822 Date: 02/08/2000


8 Feb 2000 eval1127@eng -- reproducible on NT 4 SP 6a. Key point in the <steps to reproduce> is that CTL must be released PRIOR to starting the drag.

$ java -version
java version "1.3.0rc1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0rc1-T)
Java HotSpot(TM) Client VM (build 1.3.0rc1-S, mixed mode)

  Bug ID 4218517 has been closed with status 'duplicate of 4269666'
However, it's a different bug which is still reproducible with JDK1.3RC1.
(with Bug 4218517 there's no real deadlock and there's a workaround.)

Here's the orignal bugreport for 4218517:
---------------------------------------------


This demonstrates a bug in java 1.2 DnD on Windows NT.
Move the mouse pointer to a tree node, press <Ctrl>,
press left mouse button, release <Ctrl> but don't release
the mouse button, start dragging. The cursor will change
to a 'no-drop' cursor. Now release the mouse button.
The application will remain unusable (try moving or closing
the window) until you control-click.

java full version "JDK-1.2-V"
//
import java.awt.*;
import java.awt.dnd.*;
import java.awt.datatransfer.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;

import javax.swing.*;

class Bug
{
    static String expl =
    "This demonstrates a bug in java 1.2 DnD on Windows NT.\n"+
    "Move the mouse pointer to a tree node, press <Ctrl>,\n"+
    "press left mouse button, release <Ctrl> but don't release\n"+
    "the mouse button, start dragging. The cursor will change\n"+
    "to a 'no-drop' cursor. Now release the mouse button.\n"+
    "The application will remain unusable (try moving or closing\n"+
    "the window) until you control-click.";

    public static void main(String[] args)
    {
     JFrame frame = new JFrame("Java Bug");
     frame.getContentPane().setLayout(new FlowLayout());
     frame.getContentPane().add(new JTextArea(expl));
     frame.getContentPane().add(new DragTree());
     frame.pack();
     frame.setSize(400, 600);
     frame.show();
    }
}
class DragTree extends JTree implements DragGestureListener,
DragSourceListener, Transferable
{
    public static final DataFlavor dataFlavor = new DataFlavor
(DragTree.class, "DragTree");

    DragTree()
    {
DragSource source = DragSource.getDefaultDragSource();
        source.createDefaultDragGestureRecognizer(this,
DnDConstants.ACTION_COPY_OR_MOVE, this);
    }
    public void dropActionChanged(DragSourceDragEvent
    dsde){}
    public void dragEnter(DragSourceDragEvent dsde){}
    public void dragOver(DragSourceDragEvent dsde){}
    public void dragGestureChanged(DragSourceDragEvent dsde){}
    public void dragExit(DragSourceEvent dse){}
    public void dragDropEnd(DragSourceDropEvent dsde){}
    public void dragGestureRecognized(DragGestureEvent dge)
    {
        dge.startDrag(null, this, this);
    }
    public DataFlavor[] getTransferDataFlavors()
    {
        DataFlavor[] flavors = new DataFlavor[1];
        
        flavors[0] = dataFlavor;

        return flavors;
    }
    public boolean isDataFlavorSupported(DataFlavor flavor)
    {
        return flavor.equals(dataFlavor);
    }
    public Object getTransferData(DataFlavor flavor)
            throws UnsupportedFlavorException, IOException
    {
        return "aap";
    }
}
(Review ID: 100961)
======================================================================