JTable DND requires two clicks (fixed but broken in 1.6)

Question

I'm using a JTable as a source of a drag and drop operation.
I can easily get it to work, however, when I want to start a drag from an unselected row I have to first click on the row to select it and then mouse-down on the row and then I can drag it.
I found a workaround and it was working flawlessly. I was caching the mouse-down and technically firing it twice. Although it seemed like a really cheap trick it worked, but now in 1.6 it doesn't.
Any ideas?

Answer 1

Alright, here's the code. I've tried a bunch of things, but if you can get a single-click drag working on this example, then it'll work in my stuff as well.
import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.dnd.*;
import javax.swing.*;
import javax.swing.table.*;
public class JTableDNDExample extends JTable
  // the data for the table...
  private String[][] data =
      { "Cell 1-1", "Cell 2-1", "Cell 3-1" },
      { "Cell 1-2", "Cell 2-2", "Cell 3-2" },
      { "Cell 1-3", "Cell 2-3", "Cell 3-3" },
      { "Cell 1-4", "Cell 2-4", "Cell 3-4" },
      { "Cell 1-5", "Cell 2-5", "Cell 3-5" },
  // the columns for the table...
  private String[] columns = { "Column 1", "Column 2", "Column 3" };
  public JTableDNDExample()
    // enable the drag...
    this.setDragEnabled(true);
    // create the table model with the default data...
    DefaultTableModel model = new DefaultTableModel(data, columns);
    this.setModel(model);
    // get the selection model...
    ListSelectionModel selectionModel = this.getSelectionModel();
    selectionModel.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
    // set the selection possibilities...
    this.setCellSelectionEnabled(false);
    this.setRowSelectionAllowed(true);
    this.setColumnSelectionAllowed(false);
    // create the trasnfer handler for the table...
    TransferHandler th = new TransferHandler()
      public int getSourceActions(JComponent comp)
        // return the copy or move action...
        return DnDConstants.ACTION_COPY_OR_MOVE;
      protected Transferable createTransferable(JComponent comp)
           int index = getSelectedRow();
           if(index >= 0 && index < data.length)
             // get the value at the index...
             String value = data[index][0];
             // get the string transferable for the string...
             StringSelection transferable = new StringSelection(value);
             // return the rtansferable...
          return transferable;
        // no element to transfer, return null...
        return null;
      public boolean canImport(JComponent comp, DataFlavor[] flavors)
        // cannot import, return false...
        return false;
    // se tthe transfer handler...
    this.setTransferHandler(th);
  public static void main(String[] args)
    JFrame frame = new JFrame("JTable DND Example");
    frame.getContentPane().setLayout(new GridBagLayout());
    JTableDNDExample table = new JTableDNDExample();
    JScrollPane scrollPane = new JScrollPane(table);
    frame.add(scrollPane, new GridBagConstraints(1, 1, 1, 1, 1.0, 1.0,
      GridBagConstraints.CENTER, GridBagConstraints.BOTH,
      new Insets(6, 6, 6, 6), 0, 0));
    frame.setSize(500, 500);
    frame.setVisible(true);
}