Help please with drag and drop

[Jonathan Johansen]

Hello everyone, I apologize if I am not making things the right way, although I registered a long time ago this is my first post at this forum. I have a little problem here, it work almost perfect except that when I drag from bottom to top it does not do it. I put print lines and it says that it 's doing everything correctly. If you may wonder why I am doing it this way when I could be using new StringSelection(), the the reason is because I am planing to extend Vector class to create a class Row and put info in it, so when I drag I drag the whole row, because my Row class will contain Components and Objects.
Thanks in advance for your help!!!

import javax.swing.*;
public class Transfer extends JFrame
{
	JTable one = new JTable(100, 15);
	JTable two = new JTable(1000, 10);
	DnD transferer = new DnD();
	public static void main(String ... arsg)
	{
		new Transfer();
	}
	public Transfer()
	{
		one.setTransferHandler(transferer);
		two.setTransferHandler(transferer);
		one.setDragEnabled(true);
		two.setDragEnabled(true);
		one.setName("WEST");
		two.setName("EAST");
		this.add(new JScrollPane(one), "West");
		this.add(new JScrollPane(two), "East");
		this.pack();
		this.setVisible(true);
	}
	
}

import java.util.*;
import javax.swing.*;
import javax.swing.table.*;
import java.awt.datatransfer.*;
public class DnD extends TransferHandler implements Transferable
{
	private final DataFlavor flavors = new DataFlavor(Vector.class, "Vector");
	private Vector <Object> clip = new Vector<Object>();
	public Object getTransferData(DataFlavor flavor)
	{
		return clip;
	}
	public DataFlavor [] getTransferDataFlavors()
	{
		return new DataFlavor[]{flavors};
	}
	public boolean isDataFlavorSupported(DataFlavor flavor)
	{
		return flavor.equals(flavors);
	}
	

  	public int getSourceActions(JComponent c) 
  	{
    	return TransferHandler.COPY_OR_MOVE;
  	}

  	public boolean canImport(JComponent component, DataFlavor ... flavor) 
  	{
  		System.out.println(component.getName());
    	return component instanceof JTable;// && flavor.equals(flavors);
  	}	
  	protected void exportDone(JComponent c, Transferable data, int action) 
  	{
    	cleanup(c, data);
  	}
   	public Transferable createTransferable(JComponent component) 
  	{
		clip.clear();	
      	JTable table = (JTable)component;
      	DefaultTableModel model = (DefaultTableModel)table.getModel();
      	Vector data = model.getDataVector();
		int rows [] = table.getSelectedRows();
		for(int row : rows)
		{
			clip.add((Vector)data.elementAt(row));
		}
		return this;
  	}
    public boolean importData(JComponent component, Transferable t) 
  	{
  		try
  		{
  			Vector in = (Vector)t.getTransferData(flavors);
  			JTable table = ((JTable)component);
  			DefaultTableModel model = (DefaultTableModel)table.getModel();
  		
  		
  			int row = table.getSelectedRow();
  			
  			for(Enumeration e = in.elements(); e.hasMoreElements();)
  			{
  				System.out.println("inporting "+row);
  				model.insertRow(++row, (Vector)e.nextElement());	
  			}
  		
  		}
  		catch(Exception e)
  		{
  			System.out.println(e.getCause());
  		}
		return true;
  	}
  	protected void cleanup(JComponent c, Transferable data)
  	{
  		JTable source = (JTable)c;	
  		DefaultTableModel model = (DefaultTableModel)source.getModel();
  		Vector vector = model.getDataVector();
  		try
  		{
  			Vector trash = (Vector)(data.getTransferData(flavors));
  			for(Enumeration e = trash.elements(); e.hasMoreElements();)
  			{
  				System.out.println("CLEANING");
	  			model.removeRow(vector.indexOf((Vector)e.nextElement()));	  				
  			}

  		}
  		catch(Exception e)
  		{
  			System.out.println(e.getCause());	
  		}
  	}
}

[Paul Clapham]

Thanks for providing a short, simple, compilable example. When I run it, I find that you can't drop a row anywhere above where you are dragging it from, but you can drop it anywhere below where you are dragging it from.

All I can say is, bear in mind that when you call insertRow and deleteRow, you renumber all of the rows below the point where you inserted or deleted. You also potentially change the numbers of the selected rows.