public GroupDialog(JFrame parent_,
    Vector groups_,
    int index_,
    String defaultField) 
{
    
	super(parent_, "Edit group", true);
	parent = parent_;
	groups = groups_;
	index = index_;
	if (index  >= 0) {
	    // Group entry already exists.
	    try {
		oldField = (String)groups.elementAt(index);
		field.setText(oldField);
		oldName = (String)groups.elementAt(index+1);
		name.setText(oldName);
		oldRegexp = (String)groups.elementAt(index+2);
		regexp.setText(oldRegexp);
		// We disable these text fields, since changing field
		// or regexp would leave the entries added to the
		// group hanging.
		field.setEnabled(false);
		regexp.setEnabled(false);
	    } catch (ArrayIndexOutOfBoundsException ex) {
	    }
	} else
	    field.setText(defaultField);
	ActionListener okListener = new ActionListener() {
		public void actionPerformed(ActionEvent e) {
		    // Check that there are no empty strings.
		    if ((field.getText().equals("")) ||
			(name.getText().equals("")) ||
			(regexp.getText().equals(""))) {
			JOptionPane.showMessageDialog
			    (parent, "You must provide a name, a search "
			     +"string and a field name for this group.",
			     "Create group", JOptionPane.ERROR_MESSAGE);
			return;						      
		    } 
		    // Handling of : and ; must also be done.
		    ok_pressed = true;
		    if (index <  0) {
			// New group.
			index = GroupSelector.findPos(groups, name.getText());
			groups.add(index, regexp.getText());
			groups.add(index, name.getText());
			groups.add(index, field.getText());
		    } else if (index <  groups.size()) {
			// Change group.
			for (int i=0; i< GroupSelector.DIM; i++)
			    groups.removeElementAt(index);
			index = GroupSelector.findPos(groups, name.getText());
			groups.add(index, regexp.getText());
			groups.add(index, name.getText());
			groups.add(index, field.getText());
		    }
		    dispose();
		}
	    };
	ok.addActionListener(okListener);
	name.addActionListener(okListener);
	regexp.addActionListener(okListener);
	field.addActionListener(okListener);
	/*cancel.addActionListener(new ActionListener() {
		public void actionPerformed(ActionEvent e) {
		    dispose();
		}
		});*/
	AbstractAction cancelAction = new AbstractAction() {
		public void actionPerformed(ActionEvent e) {
		    dispose();
		}
	    };
	cancel.addActionListener(cancelAction);
	// Key bindings:
	ActionMap am = main.getActionMap();
	InputMap im = main.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
	im.put(GUIGlobals.exitDialog, "close");
	am.put("close", cancelAction);
	// Layout starts here.
	main.setLayout(gbl);
	opt.setLayout(gbl);
	main.setBorder(BorderFactory.createTitledBorder
		       (BorderFactory.createEtchedBorder(),
			"Group properties"));
	// Main panel:
	con.weightx = 0;
	con.gridwidth = 1;
	con.insets = new Insets(3, 5, 3, 5);
	con.anchor = GridBagConstraints.EAST;
	con.fill = GridBagConstraints.NONE;
	con.gridx = 0;
	con.gridy = 0;
	gbl.setConstraints(nl, con);
	main.add(nl); 
	con.gridy = 1;
	gbl.setConstraints(nr, con);
	main.add(nr); 
	con.gridy = 2;
	gbl.setConstraints(nf, con);
	main.add(nf);
	con.weightx = 1;
	con.anchor = GridBagConstraints.WEST;
	con.fill = GridBagConstraints.HORIZONTAL;
	con.gridy = 0; 
	con.gridx = 1;
	gbl.setConstraints(name, con);
	main.add(name); 
	con.gridy = 1;
	gbl.setConstraints(regexp, con);
	main.add(regexp); 
	con.gridy = 2;
	gbl.setConstraints(field, con);
	main.add(field); 
       	// Option buttons:
	con.gridx = GridBagConstraints.RELATIVE;
	con.gridy = GridBagConstraints.RELATIVE;
	con.weightx = 1;
	con.gridwidth = 1;
	con.anchor = GridBagConstraints.EAST;
	con.fill = GridBagConstraints.NONE;
	gbl.setConstraints(ok, con);
	opt.add(ok);
	con.anchor = GridBagConstraints.WEST;
	con.gridwidth = GridBagConstraints.REMAINDER;
	gbl.setConstraints(cancel, con);
	opt.add(cancel);
	getContentPane().add(main, BorderLayout.CENTER);
	getContentPane().add(opt, BorderLayout.SOUTH);
	//pack();
	setSize(400, 170);
	Util.placeDialog(this, parent);
}

 public String field() 
{
 return field.getText();
}

 public int index() 
{
 return index;
}

 public String name() 
{
 return name.getText();
}

 public boolean okPressed() 
{
	return ok_pressed;
}

 public String oldField() 
{
 return oldField;
}

 public String oldName() 
{
 return oldName;
}

 public String oldRegexp() 
{
 return oldRegexp;
}

 public String regexp() 
{
 return regexp.getText();
}