OPERATING SYSTEM(S):
--------------------
Solaris Express Developer Edition x86 (SunOS 5.11 snv_64a October 2007)

FULL JDK VERSION(S):
-------------------
java version "1.6.0_02"
Java(TM) SE Runtime Environment (build 1.6.0_02-b05)
Java HotSpot(TM) Server VM (build 1.6.0_02-b05, mixed mode)

DESCRIPTION:
------------
On Motif AWT, I can drop filename data to dtfile by using DnD.
But it does not work on XAWT.

Please try following steps:

 1. Login with CDE
 2. Create temporary directory (temp)
    $ mkdir temp
 3. Change directory to temp and create temporary file
    $ touch tempfile.txt
 4. Start dtfile
    $ dtfile -dir $PWD
 5. Store testcase and Compile it
    $ javac DraggableFileTest.java
 6. Run with Motif AWT
    $ AWT_TOOLKIT=MToolkit java DraggableFileTest tempfile.txt
 7. JButton window is displayed, drag "tempfile.txt" and drop it to dtfile
 8. "File Manager - Move Warning" window is displayed
 9. Press "Cancel Move" button on Warning window
10. Stop DraggableFileTest, and rerun it with XAWT
    $ AWT_TOOLKIT=XToolkit java DraggableFileTest tempfile.txt
11. JButton window is displayed, drag "tempfile.txt" and drop it to dtfile.
    But nothing happen <=== PROBLEM

On XAWT, it seems data type for filename data is not correct.
Now it seems data type is FILE_NAME, but it should be TEXT or STRING

=====================================================================
import java.io.*;
import java.util.*;
import java.awt.*;
import java.awt.dnd.*;
import java.awt.datatransfer.*;
import javax.swing.*;

class DraggableFileTest {
    DraggableFileTest(String[] files) {
        JFrame f = new JFrame(Toolkit.getDefaultToolkit().getClass().getName());
        f.getContentPane().add(new DraggableComponent(files));
        f.pack();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setVisible(true);
    }
    public static void main(String[] args) {
        new DraggableFileTest(args);
    }

    class FileTransferable implements Transferable {
        Vector fileList = new Vector();
        FileTransferable(String[] files) {
            for(String file: files) fileList.add(new File(file));
        }
        public DataFlavor[] getTransferDataFlavors() {
            return new DataFlavor[] {DataFlavor.javaFileListFlavor};
        }
        public boolean isDataFlavorSupported(DataFlavor flavor) {
            return flavor.equals(DataFlavor.javaFileListFlavor);
        }
        public Object getTransferData(DataFlavor flavor)
            throws UnsupportedFlavorException, IOException {
            return (Object) fileList;
        }
    }

    class DraggableComponent extends JButton
            implements DragGestureListener, DragSourceListener {
        DragSource dragSource;
        String[] files;
        public DraggableComponent(String[] files) {
            dragSource = new DragSource();
            this.files = files;
            StringBuffer sb = new StringBuffer();
            for(String file: files) sb.append(","+file);
            setLabel(sb.toString().substring(1));
            dragSource.createDefaultDragGestureRecognizer(
                this, DnDConstants.ACTION_COPY_OR_MOVE, this);
        }
        public void dragGestureRecognized(DragGestureEvent evt) {
            System.out.println("dragGestureRecognized is called");
            Transferable t = new FileTransferable(files);
            dragSource.startDrag (evt, DragSource.DefaultCopyDrop, t, this);
        }
        public void dragEnter(DragSourceDragEvent evt) {
            System.out.println("dragEnter is called");
        }
        public void dragOver(DragSourceDragEvent evt) {
            System.out.println("dragOver is called");
        }
        public void dragExit(DragSourceEvent evt) {
            System.out.println("dragExit is called");
        }
        public void dropActionChanged(DragSourceDragEvent evt) {
            System.out.println("dropActionChanged is called");
        }
        public void dragDropEnd(DragSourceDropEvent evt) {
            System.out.println("dragDropEnd is called");
        }
    }
}