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OptaPlanner solves planning problems.
This lightweight, embeddable planning engine implements powerful and scalable algorithms
to optimize business resource scheduling and planning.
This module contains the examples which demonstrate how to use it in a normal Java application.
/*
* Copyright 2011 JBoss Inc
*
* 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.optaplanner.examples.tsp.swingui;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.HashSet;
import java.util.Set;
import javax.swing.ImageIcon;
import javax.swing.JPanel;
import org.optaplanner.core.api.score.buildin.simplelong.SimpleLongScore;
import org.optaplanner.examples.common.swingui.TangoColorFactory;
import org.optaplanner.examples.common.swingui.latitudelongitude.LatitudeLongitudeTranslator;
import org.optaplanner.examples.tsp.domain.City;
import org.optaplanner.examples.tsp.domain.Domicile;
import org.optaplanner.examples.tsp.domain.TravelingSalesmanTour;
import org.optaplanner.examples.tsp.domain.Visit;
public class TspWorldPanel extends JPanel {
private static final int TEXT_SIZE = 12;
private static final int CITY_NAME_TEXT_SIZE = 8;
private static final NumberFormat NUMBER_FORMAT = new DecimalFormat("#,##0.00");
private final TspPanel tspPanel;
private BufferedImage canvas = null;
private LatitudeLongitudeTranslator translator = null;
private ImageIcon europaBackground;
public TspWorldPanel(TspPanel tspPanel) {
this.tspPanel = tspPanel;
addComponentListener(new ComponentAdapter() {
@Override
public void componentResized(ComponentEvent e) {
// TODO Not thread-safe during solving
TravelingSalesmanTour travelingSalesmanTour = TspWorldPanel.this.tspPanel.getTravelingSalesmanTour();
if (travelingSalesmanTour != null) {
resetPanel(travelingSalesmanTour);
}
}
});
addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
if (translator != null) {
double longitude = translator.translateXToLongitude(e.getX());
double latitude = translator.translateYToLatitude(e.getY());
TspWorldPanel.this.tspPanel.insertCityAndVisit(longitude, latitude);
}
}
});
europaBackground = new ImageIcon(getClass().getResource("europaBackground.png"));
}
public void resetPanel(TravelingSalesmanTour travelingSalesmanTour) {
translator = new LatitudeLongitudeTranslator();
for (City city : travelingSalesmanTour.getCityList()) {
translator.addCoordinates(city.getLatitude(), city.getLongitude());
}
Dimension size = getSize();
double width = size.getWidth();
double height = size.getHeight();
translator.prepareFor(width, height);
Graphics g = createCanvas(width, height);
String tourName = travelingSalesmanTour.getName();
if (tourName.startsWith("europe")) {
g.drawImage(europaBackground.getImage(), 0, 0, translator.getImageWidth(), translator.getImageHeight(), this);
}
g.setFont(g.getFont().deriveFont((float) CITY_NAME_TEXT_SIZE));
g.setColor(TangoColorFactory.PLUM_2);
for (Visit visit : travelingSalesmanTour.getVisitList()) {
City city = visit.getCity();
int x = translator.translateLongitudeToX(city.getLongitude());
int y = translator.translateLatitudeToY(city.getLatitude());
g.fillRect(x - 1, y - 1, 3, 3);
if (city.getName() != null) {
g.drawString(city.getName(), x + 3, y - 3);
}
}
g.setColor(TangoColorFactory.ALUMINIUM_4);
Domicile domicile = travelingSalesmanTour.getDomicile();
City domicileCity = domicile.getCity();
int domicileX = translator.translateLongitudeToX(domicileCity.getLongitude());
int domicileY = translator.translateLatitudeToY(domicileCity.getLatitude());
g.fillRect(domicileX - 2, domicileY - 2, 5, 5);
if (domicileCity.getName() != null) {
g.drawString(domicileCity.getName(), domicileX + 3, domicileY - 3);
}
Set needsBackToDomicileLineSet = new HashSet(travelingSalesmanTour.getVisitList());
for (Visit trailingVisit : travelingSalesmanTour.getVisitList()) {
if (trailingVisit.getPreviousStandstill() instanceof Visit) {
needsBackToDomicileLineSet.remove(trailingVisit.getPreviousStandstill());
}
}
g.setColor(TangoColorFactory.CHOCOLATE_1);
for (Visit visit : travelingSalesmanTour.getVisitList()) {
if (visit.getPreviousStandstill() != null) {
City previousCity = visit.getPreviousStandstill().getCity();
int previousX = translator.translateLongitudeToX(previousCity.getLongitude());
int previousY = translator.translateLatitudeToY(previousCity.getLatitude());
City city = visit.getCity();
int x = translator.translateLongitudeToX(city.getLongitude());
int y = translator.translateLatitudeToY(city.getLatitude());
g.drawLine(previousX, previousY, x, y);
// Back to domicile line
if (needsBackToDomicileLineSet.contains(visit)) {
g.drawLine(x, y,domicileX, domicileY);
}
}
}
// Legend
g.setColor(TangoColorFactory.ALUMINIUM_4);
g.fillRect(5, (int) height - 15 - TEXT_SIZE, 5, 5);
g.drawString("Domicile", 15, (int) height - 10 - TEXT_SIZE);
g.setColor(TangoColorFactory.PLUM_2);
g.fillRect(6, (int) height - 9, 3, 3);
g.drawString("Visit", 15, (int) height - 5);
g.setColor(TangoColorFactory.ALUMINIUM_5);
String citiesSizeString = travelingSalesmanTour.getCityList().size() + " cities";
g.drawString(citiesSizeString,
((int) width - g.getFontMetrics().stringWidth(citiesSizeString)) / 2, (int) height - 5);
String clickString = "Click anywhere in the map to add a visit.";
g.drawString(clickString, (int) width - 5 - g.getFontMetrics().stringWidth(clickString), (int) height - 5);
// Show soft score
g.setColor(TangoColorFactory.ORANGE_3);
SimpleLongScore score = travelingSalesmanTour.getScore();
if (score != null) {
double fuel = ((double) - score.getScore()) / 1000.0;
String fuelString = NUMBER_FORMAT.format(fuel) + " fuel";
g.setFont(g.getFont().deriveFont(Font.BOLD, (float) TEXT_SIZE * 2));
g.drawString(fuelString,
(int) width - g.getFontMetrics().stringWidth(fuelString) - 10, (int) height - 10 - TEXT_SIZE);
}
repaint();
}
public void updatePanel(TravelingSalesmanTour travelingSalesmanTour) {
resetPanel(travelingSalesmanTour);
}
private Graphics createCanvas(double width, double height) {
int canvasWidth = (int) Math.ceil(width) + 1;
int canvasHeight = (int) Math.ceil(height) + 1;
canvas = new BufferedImage(canvasWidth, canvasHeight, BufferedImage.TYPE_INT_RGB);
Graphics g = canvas.getGraphics();
g.setColor(Color.WHITE);
g.fillRect(0, 0, canvasWidth, canvasHeight);
return g;
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (canvas != null) {
g.drawImage(canvas, 0, 0, this);
}
}
}