code: //==============================================================================
  //	
  //	Copyright (c) 2002-
  //	Authors:
  //	* Andrew Hinton <ug60axh@cs.bham.ac.uk> (University of Birmingham)
  //	* Dave Parker <david.parker@comlab.ox.ac.uk> (University of Oxford, formerly University of Birmingham)
  //	
  //------------------------------------------------------------------------------
  //	
  //	This file is part of PRISM.
  //	
  //	PRISM 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 2 of the License, or
  //	(at your option) any later version.
  //	
  //	PRISM 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 PRISM; if not, write to the Free Software Foundation,
  //	Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  //	
  //==============================================================================
  
  package userinterface.properties;
  
  import javax.swing.*;
  import javax.swing.border.CompoundBorder;
  import javax.swing.border.LineBorder;
  
  import java.awt.*;
  import java.util.*;
  
  @SuppressWarnings("serial")
  public class ConstantPickerList extends JPanel implements Scrollable
  {
  	private ArrayList<ConstantLine> rows;
  	private JPanel nextPanel;
  
  	/** Creates a new instance of ConstantPickerList */
  	public ConstantPickerList()
  	{
  		setLayout(new BorderLayout());
  		nextPanel = new JPanel();
  		nextPanel.setLayout(new BorderLayout());
  		add(nextPanel, BorderLayout.CENTER);
  		rows = new ArrayList<ConstantLine>();
  	}
  
  	public void addConstant(ConstantLine pl)
  	{
  		rows.add(pl);
  		JPanel containPl = new JPanel();
  		containPl.setLayout(new BorderLayout());
  		containPl.setBorder(new CompoundBorder(pl.new BottomBorder(), new LineBorder(Color.white, 2)));
  		containPl.add(pl, BorderLayout.CENTER);
  		nextPanel.add(containPl, BorderLayout.NORTH);
  		JPanel np = new JPanel();
  		np.setLayout(new BorderLayout());
  		nextPanel.add(np, BorderLayout.CENTER);
  		nextPanel = np;
  	}
  
  	public Dimension getPreferredScrollableViewportSize()
  	{
  		return getPreferredSize();
  	}
  
  	public int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction)
  	{
  		return 20;
  	}
  
  	public boolean getScrollableTracksViewportHeight()
  	{
  		return false;
  	}
  
  	public boolean getScrollableTracksViewportWidth()
  	{
  		return true;
  	}
  
  	public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction)
  	{
  		return 40;
  	}
  
  	public int getNumConstants()
  	{
  		return rows.size();
  	}
  
  	public ConstantLine getConstantLine(int i)
  	{
  		return rows.get(i);
  	}
  
  }
  