org.drools.planner.examples.tsp.swingui.TspWorldPanel Maven / Gradle / Ivy
/*
* 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.drools.planner.examples.tsp.swingui;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import javax.swing.JPanel;
import org.drools.planner.core.solution.Solution;
import org.drools.planner.examples.tsp.domain.City;
import org.drools.planner.examples.tsp.domain.CityAssignment;
import org.drools.planner.examples.tsp.domain.TravelingSalesmanTour;
/**
* TODO this code is highly unoptimized
*/
public class TspWorldPanel extends JPanel {
private final TspPanel tspPanel;
private BufferedImage canvas = null;
public TspWorldPanel(TspPanel tspPanel) {
this.tspPanel = tspPanel;
}
public void resetPanel(Solution solution) {
TravelingSalesmanTour travelingSalesmanTour = (TravelingSalesmanTour) solution;
LatitudeLongitudeTranslator 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);
g.setColor(Color.RED);
for (City city : travelingSalesmanTour.getCityList()) {
int x = translator.translateLongitude(city.getLongitude());
int y = translator.translateLatitude(city.getLatitude());
g.fillRect(x - 1, y - 1, 3, 3);
}
g.setColor(Color.BLACK);
for (CityAssignment cityAssignment : travelingSalesmanTour.getCityAssignmentList()) {
if (cityAssignment.getNextCityAssignment() != null) {
City city1 = cityAssignment.getCity();
int x1 = translator.translateLongitude(city1.getLongitude());
int y1 = translator.translateLatitude(city1.getLatitude());
City city2 = cityAssignment.getNextCityAssignment().getCity();
int x2 = translator.translateLongitude(city2.getLongitude());
int y2 = translator.translateLatitude(city2.getLatitude());
g.drawLine(x1, y1, x2, y2);
}
}
repaint();
}
private static class LatitudeLongitudeTranslator {
private double minimumLatitude = Double.MAX_VALUE;
private double maximumLatitude = -Double.MAX_VALUE;
private double minimumLongitude = Double.MAX_VALUE;
private double maximumLongitude = -Double.MAX_VALUE;
private double latitudeLength = 0.0;
private double longitudeLength = 0.0;
private double width = 0.0;
private double height = 0.0;
public void addCoordinates(double latitude, double longitude) {
if (latitude < minimumLatitude) {
minimumLatitude = latitude;
}
if (latitude > maximumLatitude) {
maximumLatitude = latitude;
}
if (longitude < minimumLongitude) {
minimumLongitude = longitude;
}
if (longitude > maximumLongitude) {
maximumLongitude = longitude;
}
}
public void prepareFor(double width, double height) {
this.width = width;
this.height = height;
latitudeLength = maximumLatitude - minimumLatitude;
longitudeLength = maximumLongitude - minimumLongitude;
}
public int translateLongitude(double value) {
return (int) Math.floor((value - minimumLongitude) * width / longitudeLength);
}
public int translateLatitude(double value) {
return (int) Math.floor((maximumLatitude - value) * height / latitudeLength);
}
}
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);
}
}
}