//=============================================================================
// Copyright 2006-2010 Daniel W. Dyer
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//=============================================================================
package org.uncommons.watchmaker.examples.travellingsalesman;
import java.awt.BorderLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
/**
* Panel for configuring a route-finding strategy for the travelling
* salesman problem.
* @author Daniel Dyer
*/
final class StrategyPanel extends JPanel
{
private final DistanceLookup distances;
private final JRadioButton evolutionOption;
private final JRadioButton bruteForceOption;
private final EvolutionPanel evolutionPanel;
/**
* Creates a panel with components for controlling the route-finding
* strategy.
* @param distances Data used by the strategy in order to calculate
* shortest routes.
*/
StrategyPanel(DistanceLookup distances)
{
super(new BorderLayout());
this.distances = distances;
evolutionOption = new JRadioButton("Evolution", true);
evolutionOption.setName("EvolutionOption"); // Helps to find the radio button from a unit test.
bruteForceOption = new JRadioButton("Brute Force", false);
bruteForceOption.setName("BruteForceOption"); // Helps to find the radio button from a unit test.
evolutionOption.addItemListener(new ItemListener()
{
public void itemStateChanged(ItemEvent itemEvent)
{
evolutionPanel.setEnabled(evolutionOption.isSelected());
}
});
ButtonGroup strategyGroup = new ButtonGroup();
strategyGroup.add(evolutionOption);
strategyGroup.add(bruteForceOption);
evolutionPanel = new EvolutionPanel(distances);
evolutionPanel.setName("EvolutionPanel"); // Helps to find the panel from a unit test.
add(evolutionOption, BorderLayout.NORTH);
add(evolutionPanel, BorderLayout.CENTER);
add(bruteForceOption, BorderLayout.SOUTH);
setBorder(BorderFactory.createTitledBorder("Route-Finding Strategy"));
}
public TravellingSalesmanStrategy getStrategy()
{
if (bruteForceOption.isSelected())
{
return new BruteForceTravellingSalesman(distances);
}
else
{
return evolutionPanel.getStrategy();
}
}
@Override
public void setEnabled(boolean b)
{
evolutionOption.setEnabled(b);
bruteForceOption.setEnabled(b);
evolutionPanel.setEnabled(b && evolutionOption.isSelected());
super.setEnabled(b);
}
}