Drag and Drop JDK1.4.0

[Patrick ODonnell]

Hi all,
I have just downloaded JDK1.4.0 and I would like to be able to create a Jlist of components from which I could drag items to a JTextfield. Has anyone done this or can it be done?? I have seen example on the sun website but it says these will become obsolete in v1.4.0. Has anyone got any information on this or pointers.
Thanks,
Patrick.

[Matt Senecal]

Hi,
This is an example program that lets you drag and drop from a JList to a JTextField:

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

public class DragTest
{
   JFrame mainFrame = null;
   
   public DragTest()
   {
      init();
   } //end DragTest
   
   private Component createComponents()
   {
      //Data vector for the JList
      Vector theVector = new Vector();
      theVector.addElement("Dilbert");
      theVector.addElement("Dogbert");
      theVector.addElement("Catbert");
      theVector.addElement("Ratbert");
      theVector.addElement("PHB");
      JList theList = new JList(theVector);
      theList.setDragEnabled(true);
      
      JScrollPane theScrollPane = new JScrollPane(theList);
      
      //The text field
      JTextField textField = new JTextField(25);
      textField.setDragEnabled(true);
      
      JLabel theLabel = new JLabel("Drop Here:");
      theLabel.setTransferHandler(new TransferHandler("text"));
      MouseListener ml = new MouseAdapter()
      {
         public void mousePressed(MouseEvent e)
         {
            JComponent c = (JComponent) e.getSource();
            TransferHandler th = c.getTransferHandler();
            th.exportAsDrag(c, e, TransferHandler.COPY);
         } //end mousePressed 
      }; //end mouseAdapter
      theLabel.addMouseListener(ml);
   
      JPanel labelPane = new JPanel();
      labelPane.setLayout(new BoxLayout(labelPane, BoxLayout.X_AXIS));
      labelPane.add(theLabel);
      labelPane.add(textField);
   
      JPanel mainPane = new JPanel();
      mainPane.setLayout(new BoxLayout(mainPane, BoxLayout.Y_AXIS));
      mainPane.add(labelPane);
      mainPane.add(theScrollPane);
      
      return mainPane;
   } //end createComponents
   
   
   private void init()
   {
      mainFrame = new JFrame("Drag and Drop Test");
      mainFrame.getContentPane().add(createComponents());
      mainFrame.pack();
      mainFrame.setVisible(true);
   } //end init
   
   public static void main(String[] argv)
   {
      DragTest dt = new DragTest();
   } //end main
} //end class DragTest

---Matt

Originally posted by Patrick ODonnell:
Hi all,
I have just downloaded JDK1.4.0 and I would like to be able to create a Jlist of components from which I could drag items to a JTextfield. Has anyone done this or can it be done?? I have seen example on the sun website but it says these will become obsolete in v1.4.0. Has anyone got any information on this or pointers.
Thanks,
Patrick.