Drag and drop JButtons between JPanels

Question

I'm trying to write an application with some simple drag and drop for JButtons between JPanels. Instead of going through all the hassle with DragSourceListener, DropTargetListener etc, I was thinking about a simple MouseMotionListener which sets a boolean to true when the user is dragging, and let the other panel add a MouseListener which listens for a MouseReleased.
The drag part is working fine, however the drop is not; in fact, it doesn't register the release. However, when I click and release, it seems to register the release.
Any suggestions? Thanks in advance.
Code for Card:
public Card extends JButton {
public static boolean drag = false;
     public Card(ImageIcon icon, ImageIcon fullicon)
          addMouseMotionListener(new DragMouseListener());
     class DragMouseListener extends MouseMotionAdapter
          public void mouseDragged(MouseEvent e)
               System.out.println("Drag register");
               drag = true;
}Code for the panel:
benchpanel.addMouseListener(new MouseAdapter() {
     public void mouseReleased(MouseEvent e)
          if (Card.drag && GUI.getInstance().findComponentAt(e.getPoint()) == GUI.getInstance().benchpanel)
               System.out.println("Drop registered");
          Card.drag = false;
});

Answer 1

Sorry for the double post. I had some experimenting done, and I come up with the following:
if (Card.drag && GUI.getInstance().benchpanel.getBounds().contains(e.getLocationOnScreen()))
     System.out.println("Drop registered");
}Here's the problem: The second part of the if-statement never seems to get true; if I write the following:
System.out.println(e.getPoint());
System.out.println(benchpanel.getBounds());
System.out.println(benchpanel.getBounds().contains(e.getPoint()));and i click in the upper left part of the JPanel, i get the following output:
java.awt.Point[x=9,y=13]
java.awt.Rectangle[x=210,y=420,width=400,height=108]
false- so for some reason, the bounds on the JPanel are totally messed up - any ideas on why?
Edited by: pg-robban on Apr 14, 2009 3:14 AM