/*
* $RCSfile: ColumnPanel.java,v $
* $Revision: 1.3 $
* $Date: 2008/08/14 11:01:04 $
* $Author: wojna $
*
* Copyright (C) 2008 Logic Group, Institute of Mathematics, Warsaw University
*
* This file is part of Rseslib.
*
* Rseslib is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Rseslib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package rseslib.processing.classification.rules.roughset;
import javax.swing.*;
import java.awt.*;
/**
* Extension of JPanel with vertical ordering of elements but different
* form GridLayout ordering
* @author Krzysztof Niemkiewicz
*/
public class ColumnPanel extends JPanel{
private static final long serialVersionUID = -9136989269080945298L;
JPanel last;
/**
* Main constructor
*/
public ColumnPanel() {
super(new BorderLayout());
last=this;
}
/**
* Only method, used to add new component below all other components added before
* @param comp component to be added
* @return the same component
*/
public Component add(Component comp){
if (comp==null){return null;};
try{
last.add(comp,BorderLayout.NORTH);
}catch(UnsupportedOperationException e){};
JPanel n=new JPanel(new BorderLayout());
try {
last.add(n,BorderLayout.CENTER);
} catch(UnsupportedOperationException e) {}
last=n;
return comp;
}
/**
* Unsupported operation
* @throws UnsupportedOperationException
*/
public void add(Component comp,Object constraints){
super.add(comp,constraints);
throw new UnsupportedOperationException("This operation isn't supported");
}
}
