package org.opentrafficsim.graphs;
   
   import static org.junit.Assert.assertEquals;
   import static org.junit.Assert.assertFalse;
   import static org.junit.Assert.assertTrue;
   import static org.junit.Assert.fail;
   
   import java.awt.Component;
   import java.awt.Container;
  import java.awt.event.ActionEvent;
  import java.awt.event.MouseListener;
  import java.util.ArrayList;
  import java.util.List;
  
  import javax.swing.JLabel;
  import javax.swing.JOptionPane;
  
  import nl.tudelft.simulation.dsol.SimRuntimeException;
  import nl.tudelft.simulation.dsol.simulators.SimulatorInterface;
  
  import org.djunits.unit.AccelerationUnit;
  import org.djunits.unit.LengthUnit;
  import org.djunits.unit.TimeUnit;
  import org.djunits.unit.UNITS;
  import org.djunits.value.vdouble.scalar.Acceleration;
  import org.djunits.value.vdouble.scalar.DoubleScalar;
  import org.djunits.value.vdouble.scalar.Length;
  import org.djunits.value.vdouble.scalar.Speed;
  import org.djunits.value.vdouble.scalar.Time;
  import org.jfree.chart.ChartPanel;
  import org.jfree.data.DomainOrder;
  import org.junit.Test;
  import org.opentrafficsim.core.dsol.OTSModelInterface;
  import org.opentrafficsim.core.dsol.OTSSimTimeDouble;
  import org.opentrafficsim.core.geometry.OTSPoint3D;
  import org.opentrafficsim.core.gtu.GTUType;
  import org.opentrafficsim.core.network.LongitudinalDirectionality;
  import org.opentrafficsim.core.network.OTSNetwork;
  import org.opentrafficsim.core.network.OTSNode;
  import org.opentrafficsim.road.car.CarTest;
  import org.opentrafficsim.road.gtu.lane.LaneBasedIndividualGTU;
  import org.opentrafficsim.road.gtu.lane.tactical.following.FixedAccelerationModel;
  import org.opentrafficsim.road.gtu.lane.tactical.following.SequentialFixedAccelerationModel;
  import org.opentrafficsim.road.gtu.lane.tactical.lanechangemobil.Egoistic;
  import org.opentrafficsim.road.gtu.lane.tactical.lanechangemobil.LaneChangeModel;
  import org.opentrafficsim.road.network.factory.LaneFactory;
  import org.opentrafficsim.road.network.lane.Lane;
  import org.opentrafficsim.road.network.lane.LaneType;
  import org.opentrafficsim.simulationengine.SimpleSimulator;
  
  /**
   * Test the non-GUI part of the ContourPlot class.
   * <p>
   * Copyright (c) 2013-2015 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
   * BSD-style license. See <a href="http://opentrafficsim.org/docs/license.html">OpenTrafficSim License</a>.
   * <p>
   * $LastChangedDate: 2015-09-14 01:33:02 +0200 (Mon, 14 Sep 2015) $, @version $Revision: 1401 $, by $Author: averbraeck $,
   * initial version Aug 21, 2014 <br>
   * @author <a href="http://www.tudelft.nl/pknoppers">Peter Knoppers</a>
   */
  public class ContourPlotTest implements UNITS
  {
      /**
       * Create a dummy path for the tests.
       * @param laneType the lane type
       * @param gtuType the GTU type
       * @return List&lt;Lane&gt;; the dummy path
       * @throws Exception when something goes wrong (should not happen)
       */
      private List<Lane> dummyPath(final LaneType laneType, final GTUType gtuType) throws Exception
      {
          OTSNode b = new OTSNode("B", new OTSPoint3D(12345, 0, 0));
          ArrayList<Lane> result = new ArrayList<Lane>();
          Lane[] lanes =
              LaneFactory.makeMultiLane("AtoB", new OTSNode("A", new OTSPoint3D(1234, 0, 0)), b, null, 1, laneType,
                  new Speed(100, KM_PER_HOUR), null, LongitudinalDirectionality.DIR_PLUS);
          result.add(lanes[0]);
          // Make a continuation lane to prevent errors when the operational plan exceeds the available remaining length
          lanes =
              LaneFactory.makeMultiLane("BtoC", b, new OTSNode("C", new OTSPoint3D(99999, 0, 0)), null, 1, laneType,
                  new Speed(100, KM_PER_HOUR), null, LongitudinalDirectionality.DIR_PLUS);
          // System.out.println("continuation lane is " + lanes[0] + " length is " + lanes[0].getLength());
          // System.out.println("next lanes is " + result.get(0).nextLanes(gtuType));
          return result;
      }
  
      /**
       * Test the AccelerationContourPlot.
       * @throws Exception when something goes wrong (should not happen)
       */
      @SuppressWarnings("static-method")
      @Test
      public final void accelerationContourTest() throws Exception
      {
          LaneType laneType = new LaneType("CarLane");
          GTUType gtuType = GTUType.makeGTUType("Car");
          laneType.addCompatibility(gtuType);
          List<Lane> path = dummyPath(laneType, gtuType);
          AccelerationContourPlot acp = new AccelerationContourPlot("Acceleration", path);
         assertTrue("newly created AccelerationContourPlot should not be null", null != acp);
         assertEquals("SeriesKey should be \"acceleration\"", "acceleration", acp.getSeriesKey(0));
         standardContourTests(acp, path.get(0), gtuType, Double.NaN, 0);
     }
 
     /**
      * Test the DensityContourPlot.
      * @throws Exception when something goes wrong (should not happen)
      */
     @SuppressWarnings("static-method")
     @Test
     public final void densityContourTest() throws Exception
     {
         LaneType laneType = new LaneType("CarLane");
         GTUType gtuType = GTUType.makeGTUType("Car");
         laneType.addCompatibility(gtuType);
         List<Lane> path = dummyPath(laneType, gtuType);
         DensityContourPlot dcp = new DensityContourPlot("Density", path);
         assertTrue("newly created DensityContourPlot should not be null", null != dcp);
         assertEquals("SeriesKey should be \"density\"", "density", dcp.getSeriesKey(0));
         standardContourTests(dcp, path.get(0), gtuType, 0, Double.NaN);
     }
 
     /**
      * Debugging method.
      * @param cp
      * @param fromX
      * @param toX
      * @param fromY
      * @param toY
      */
     static void printMatrix(ContourPlot cp, int fromX, int toX, int fromY, int toY)
     {
         System.out.println("Contour plot data:");
         int maxItem = cp.getItemCount(0);
         for (int y = fromY; y <= toY; y++)
         {
             System.out.print(String.format("y=%3d ", y));
             for (int x = fromX; x <= toX; x++)
             {
                 // Find the item with the requested x and y
                 int item;
                 for (item = 0; item < maxItem; item++)
                 {
                     if (cp.getXValue(0, item) == x && cp.getYValue(0, item) == y)
                     {
                         break;
                     }
                 }
                 if (item < maxItem)
                 {
                     System.out.print(String.format("%10.6f", cp.getZValue(0, item)));
                 }
                 else
                 {
                     System.out.print(" -------- ");
                 }
             }
             System.out.println("");
         }
         System.out.print("");
     }
 
     /**
      * Test the FlowContourPlot.
      * @throws Exception when something goes wrong (should not happen)
      */
     @SuppressWarnings("static-method")
     @Test
     public final void flowContourTest() throws Exception
     {
         LaneType laneType = new LaneType("CarLane");
         GTUType gtuType = GTUType.makeGTUType("Car");
         laneType.addCompatibility(gtuType);
         List<Lane> path = dummyPath(laneType, gtuType);
         FlowContourPlot fcp = new FlowContourPlot("Density", path);
         assertTrue("newly created DensityContourPlot should not be null", null != fcp);
         assertEquals("SeriesKey should be \"flow\"", "flow", fcp.getSeriesKey(0));
         standardContourTests(fcp, path.get(0), gtuType, 0, Double.NaN);
     }
 
     /**
      * Test the SpeedContourPlot.
      * @throws Exception when something goes wrong (should not happen)
      */
     @SuppressWarnings("static-method")
     @Test
     public final void speedContourTest() throws Exception
     {
         LaneType laneType = new LaneType("CarLane");
         GTUType gtuType = GTUType.makeGTUType("Car");
         laneType.addCompatibility(gtuType);
         List<Lane> path = dummyPath(laneType, gtuType);
         SpeedContourPlot scp = new SpeedContourPlot("Density", path);
         assertTrue("newly created DensityContourPlot should not be null", null != scp);
         assertEquals("SeriesKey should be \"speed\"", "speed", scp.getSeriesKey(0));
         standardContourTests(scp, path.get(0), gtuType, Double.NaN, 50);
     }
 
     /**
      * Test various properties of a ContourPlot that has no observed data added.
      * @param cp ContourPlot; the ContourPlot to test
      * @param lane Lane; the lane on which the test GTUs are run
      * @param gtuType GTUType; the type of GTU
      * @param expectedZValue double; the value that getZ and getZValue should return for a valid item when no car has passed
      * @param expectedZValueWithTraffic double; the value that getZ and getZValue should return a valid item where a car has
      *            traveled at constant speed of 50 km/h. Supply Double.NaN if the value varies but differs from the value
      *            expected when no car has passed
      * @throws Exception when something goes wrong (should not happen)
      */
     public static void standardContourTests(final ContourPlot cp, Lane lane, GTUType gtuType,
         final double expectedZValue, final double expectedZValueWithTraffic) throws Exception
     {
         assertEquals("seriesCount should be 1", 1, cp.getSeriesCount());
         assertEquals("domainOrder should be ASCENDING", DomainOrder.ASCENDING, cp.getDomainOrder());
         assertEquals("indexOf always returns 0", 0, cp.indexOf(0));
         assertEquals("indexOf always returns 0", 0, cp.indexOf("abc"));
         assertEquals("getGroup always returns null", null, cp.getGroup());
         int xBins = cp.xAxisBins();
         int yBins = cp.yAxisBins();
         int expectedXBins =
             (int) Math.ceil((DoubleScalar.minus(ContourPlot.INITIALUPPERTIMEBOUND, ContourPlot.INITIALLOWERTIMEBOUND)
                 .getSI()) / ContourPlot.STANDARDTIMEGRANULARITIES[ContourPlot.STANDARDINITIALTIMEGRANULARITYINDEX]);
         assertEquals("Initial xBins should be " + expectedXBins, expectedXBins, xBins);
         int expectedYBins =
             (int) Math.ceil(lane.getLength().getSI()
                 / ContourPlot.STANDARDDISTANCEGRANULARITIES[ContourPlot.STANDARDINITIALDISTANCEGRANULARITYINDEX]);
         assertEquals("yBins should be " + expectedYBins, expectedYBins, yBins);
         int bins = cp.getItemCount(0);
         assertEquals("Total bin count is product of xBins * yBins", xBins * yBins, bins);
         // Cache the String equivalents of minimumDistance and maximumDistance, INITIALLOWERTIMEBOUND and
         // INITUALUPPERTIMEBOUND
         String initialLowerTimeBoundString = ContourPlot.INITIALLOWERTIMEBOUND.toString();
         String initialUpperTimeBoundString = ContourPlot.INITIALUPPERTIMEBOUND.toString();
         // Vary the x granularity
         for (double timeGranularity : ContourPlot.STANDARDTIMEGRANULARITIES)
         {
             cp.actionPerformed(new ActionEvent(cp, 0, "setTimeGranularity " + timeGranularity));
             for (double distanceGranularity : ContourPlot.STANDARDDISTANCEGRANULARITIES)
             {
                 cp.actionPerformed(new ActionEvent(cp, 0, "setDistanceGranularity " + distanceGranularity));
                 cp.reGraph();
                 expectedXBins =
                     (int) Math.ceil((DoubleScalar.minus(ContourPlot.INITIALUPPERTIMEBOUND,
                         ContourPlot.INITIALLOWERTIMEBOUND).getSI()) / timeGranularity);
                 xBins = cp.xAxisBins();
                 assertEquals("Modified xBins should be " + expectedXBins, expectedXBins, xBins);
                 expectedYBins = (int) Math.ceil(lane.getLength().getSI() / distanceGranularity);
                 yBins = cp.yAxisBins();
                 assertEquals("Modified yBins should be " + expectedYBins, expectedYBins, yBins);
                 bins = cp.getItemCount(0);
                 assertEquals("Total bin count is product of xBins * yBins", xBins * yBins, bins);
                 for (int item = 0; item < bins; item++)
                 {
                     double x = cp.getXValue(0, item);
                     assertTrue("X should be >= " + initialLowerTimeBoundString,
                         x >= ContourPlot.INITIALLOWERTIMEBOUND.getSI());
                     assertTrue("X should be <= " + initialUpperTimeBoundString,
                         x <= ContourPlot.INITIALUPPERTIMEBOUND.getSI());
                     Number alternateX = cp.getX(0, item);
                     assertEquals("getXValue and getX should return things that have the same value", x,
                         alternateX.doubleValue(), 0.000001);
                     double y = cp.getYValue(0, item);
                     Number alternateY = cp.getY(0, item);
                     assertEquals("getYValue and getY should return things that have the same value", y,
                         alternateY.doubleValue(), 0.000001);
                     double z = cp.getZValue(0, item);
                     if (Double.isNaN(expectedZValue))
                     {
                         assertTrue("Z value should be NaN", Double.isNaN(z));
                     }
                     else
                     {
                         assertEquals("Z value should be " + expectedZValue, expectedZValue, z, 0.0001);
                     }
                     Number alternateZ = cp.getZ(0, item);
                     if (Double.isNaN(expectedZValue))
                     {
                         assertTrue("Alternate Z value should be NaN", Double.isNaN(alternateZ.doubleValue()));
                     }
                     else
                     {
                         assertEquals("Alternate Z value should be " + expectedZValue, expectedZValue,
                             alternateZ.doubleValue(), 0.0000);
                     }
                 }
                 try
                 {
                     cp.getXValue(0, -1);
                     fail("Should have thrown an Exception");
                 }
                 catch (RuntimeException e)
                 {
                     // Ignore
                 }
                 try
                 {
                     cp.getXValue(0, bins);
                     fail("Should have thrown an Exception");
                 }
                 catch (RuntimeException e)
                 {
                     // Ignore
                 }
                 try
                 {
                     cp.yAxisBin(-1);
                     fail("Should have thrown an Exception");
                 }
                 catch (RuntimeException e)
                 {
                     // Ignore
                 }
                 try
                 {
                     cp.yAxisBin(bins);
                     fail("Should have thrown an Exception");
                 }
                 catch (RuntimeException e)
                 {
                     // Ignore
                 }
             }
         }
         // Test some ActionEvents that ContourPlot can not handle
         try
         {
             cp.actionPerformed(new ActionEvent(cp, 0, "blabla"));
             fail("Should have thrown an Exception");
         }
         catch (RuntimeException e)
         {
             // Ignore
         }
         try
         {
             cp.actionPerformed(new ActionEvent(cp, 0, "setDistanceGranularity -1"));
             fail("Should have thrown an Exception");
         }
         catch (RuntimeException e)
         {
             // ignore
         }
         try
         {
             cp.actionPerformed(new ActionEvent(cp, 0, "setDistanceGranularity abc"));
             fail("Should have thrown an Exception");
         }
         catch (RuntimeException e)
         {
             // ignore
         }
         try
         {
             cp.actionPerformed(new ActionEvent(cp, 0, "setDistanceGranularitIE 10")); // typo in the event name
             fail("Should have thrown an Exception");
         }
         catch (RuntimeException e)
         {
             // ignore
         }
         // Make the time granularity a bit more reasonable
         final double useTimeGranularity = 30; // [s]
         cp.actionPerformed(new ActionEvent(cp, 0, "setTimeGranularity " + useTimeGranularity));
         final double useDistanceGranularity =
             ContourPlot.STANDARDDISTANCEGRANULARITIES[ContourPlot.STANDARDDISTANCEGRANULARITIES.length - 1];
         cp.actionPerformed(new ActionEvent(cp, 0, "setDistanceGranularity " + useDistanceGranularity));
         cp.reGraph();
         bins = cp.getItemCount(0);
         Time.Abs initialTime = new Time.Abs(0, SECOND);
         Length.Rel initialPosition = new Length.Rel(100, METER);
         Speed initialSpeed = new Speed(50, KM_PER_HOUR);
         ContourPlotModel model = new ContourPlotModel();
         SimpleSimulator simulator =
             new SimpleSimulator(initialTime, new Time.Rel(0, SECOND), new Time.Rel(1800, SECOND), model);
         // Create a car running 50 km.h
         SequentialFixedAccelerationModel gtuFollowingModel =
             new SequentialFixedAccelerationModel(simulator, new Acceleration(2.0, AccelerationUnit.METER_PER_SECOND_2));
         // Make the car run at constant speed for one minute
         gtuFollowingModel.addStep(new FixedAccelerationModel(new Acceleration(0, METER_PER_SECOND_2), new Time.Rel(60,
             SECOND)));
         // Make the car run at constant speed for another minute
         gtuFollowingModel.addStep(new FixedAccelerationModel(new Acceleration(0, METER_PER_SECOND_2), new Time.Rel(600,
             SECOND)));
         // Make the car run at constant speed for five more minutes
         gtuFollowingModel.addStep(new FixedAccelerationModel(new Acceleration(0, METER_PER_SECOND_2), new Time.Rel(300,
             SECOND)));
         LaneChangeModel laneChangeModel = new Egoistic();
         OTSNetwork network = new OTSNetwork("network");
         LaneBasedIndividualGTU car =
             CarTest.makeReferenceCar("0", gtuType, lane, initialPosition, initialSpeed, simulator, gtuFollowingModel,
                 laneChangeModel, network);
         car.getStrategicalPlanner().getDrivingCharacteristics()
             .setForwardHeadwayDistance(new Length.Rel(10, LengthUnit.KILOMETER));
         // Check that the initial data in the graph contains no trace of any car.
         for (int item = 0; item < bins; item++)
         {
             double x = cp.getXValue(0, item);
             assertTrue("X should be >= " + ContourPlot.INITIALLOWERTIMEBOUND,
                 x >= ContourPlot.INITIALLOWERTIMEBOUND.getSI());
             assertTrue("X should be <= " + ContourPlot.INITIALUPPERTIMEBOUND,
                 x <= ContourPlot.INITIALUPPERTIMEBOUND.getSI());
             Number alternateX = cp.getX(0, item);
             assertEquals("getXValue and getX should return things that have the same value", x,
                 alternateX.doubleValue(), 0.000001);
             double y = cp.getYValue(0, item);
             Number alternateY = cp.getY(0, item);
             assertEquals("getYValue and getY should return things that have the same value", y,
                 alternateY.doubleValue(), 0.000001);
             double z = cp.getZValue(0, item);
             if (Double.isNaN(expectedZValue))
             {
                 assertTrue("Z value should be NaN (got " + z + ")", Double.isNaN(z));
             }
             else
             {
                 assertEquals("Z value should be " + expectedZValue, expectedZValue, z, 0.0001);
             }
             Number alternateZ = cp.getZ(0, item);
             if (Double.isNaN(expectedZValue))
             {
                 assertTrue("Alternate Z value should be NaN", Double.isNaN(alternateZ.doubleValue()));
             }
             else
             {
                 assertEquals("Alternate Z value should be " + expectedZValue, expectedZValue, alternateZ.doubleValue(),
                     0.0000);
             }
         }
         // System.out.println("Running simulator from " + simulator.getSimulatorTime().get() + " to "
         // + gtuFollowingModel.timeAfterCompletionOfStep(0));
         double stopTime = gtuFollowingModel.timeAfterCompletionOfStep(0).si;
         simulator.runUpToAndIncluding(new Time.Abs(stopTime, TimeUnit.SI));
         while (simulator.isRunning())
         {
             try
             {
                 Thread.sleep(10);
             }
             catch (InterruptedException ie)
             {
                 ie = null; // ignore
             }
         }
         // System.out.println("Simulator is now at " + simulator.getSimulatorTime().get());
         // System.out.println("Car at start time " + car.getOperationalPlan().getStartTime() + " is at "
         // + car.getPosition(car.getOperationalPlan().getStartTime()));
         // System.out.println("At time " + simulator.getSimulator().getSimulatorTime().getTime() + " car is at " + car);
         for (int item = 0; item < bins; item++)
         {
             double x = cp.getXValue(0, item);
             assertTrue("X should be >= " + ContourPlot.INITIALLOWERTIMEBOUND,
                 x >= ContourPlot.INITIALLOWERTIMEBOUND.getSI());
             assertTrue("X should be <= " + ContourPlot.INITIALUPPERTIMEBOUND,
                 x <= ContourPlot.INITIALUPPERTIMEBOUND.getSI());
             Number alternateX = cp.getX(0, item);
             assertEquals("getXValue and getX should return things that have the same value", x,
                 alternateX.doubleValue(), 0.000001);
             double y = cp.getYValue(0, item);
             Number alternateY = cp.getY(0, item);
             assertEquals("getYValue and getY should return things that have the same value", y,
                 alternateY.doubleValue(), 0.000001);
             double z = cp.getZValue(0, item);
             // figure out if the car has traveled through this cell
             // if (x >= 180)
             // System.out.println(String.format("t=%.3f, x=%.3f z=%f, exp=%.3f, carLastEval=%s, carNextEval=%s", x, y, z,
             // expectedZValue, car.getOperationalPlan().getStartTime().getSI(), car.getOperationalPlan().getEndTime()
             // .getSI()));
             boolean hit = false;
             if (x + useTimeGranularity >= 0// car.getOperationalPlan().getStartTime().getSI()
                 && x < 60)// car.getOperationalPlan().getEndTime().getSI())
             {
                 // the car MAY have contributed to this cell
                 Time.Abs cellStartTime =
                     new Time.Abs(Math.max(car.getOperationalPlan().getStartTime().getSI(), x), SECOND);
                 Time.Abs cellEndTime =
                     new Time.Abs(Math.min(car.getOperationalPlan().getEndTime().getSI(), x + useTimeGranularity),
                         SECOND);
                 // System.out.println("cellStartTime=" + cellStartTime + ", cellEndTime=" + cellEndTime);
                 // The next if statement is the problem
                 // if (cellStartTime.lt(cellEndTime)
                 // && car.position(lane, car.getRear(), cellStartTime).getSI() <= y + useDistanceGranularity
                 // && car.position(lane, car.getRear(), cellEndTime).getSI() >= y)
                 double xAtCellStartTime = initialPosition.si + initialSpeed.si * cellStartTime.si;
                 double xAtCellEndTime = initialPosition.si + initialSpeed.si * cellEndTime.si;
                 if (xAtCellStartTime < y + useDistanceGranularity && xAtCellEndTime >= y)
                 {
                     hit = true;
                 }
             }
             // System.out.println(String.format(
             // "hit=%s, t=%.3f, x=%.3f z=%f, exp=%.3f, carLastEval=%s, carNextEval=%s, simulatortime=%s", hit, x, y, z,
             // expectedZValue, car.getOperationalPlan().getStartTime().getSI(), car.getOperationalPlan().getEndTime()
             // .getSI(), car.getSimulator().getSimulatorTime().get()));
             Number alternateZ = cp.getZ(0, item);
             if (hit)
             {
                 if (!Double.isNaN(expectedZValueWithTraffic))
                 {
                     if (Double.isNaN(z))
                     {
                         printMatrix(cp, 0, 10, 0, 10);
                         System.out.println("Oops - z is NaN, expected z value with traffic is "
                             + expectedZValueWithTraffic);
                     }
                     assertEquals("Z value should be " + expectedZValueWithTraffic, expectedZValueWithTraffic, z, 0.0001);
                     assertEquals("Z value should be " + expectedZValueWithTraffic, expectedZValueWithTraffic,
                         alternateZ.doubleValue(), 0.0001);
                 }
                 else
                 {
                     if (Double.isNaN(expectedZValue))
                     { // FIXME looks wrong / PK
                         assertFalse("Z value should not be NaN", Double.isNaN(z));
                     }
                 }
             }
             else
             {
                 if (Double.isNaN(expectedZValue))
                 {
                     // if (!Double.isNaN(z))
                     // {
                     // System.out.println("Oops");
                     // Time.Abs cellStartTime = new Time.Abs(x, SECOND);
                     // Time.Abs cellEndTime =
                     // new Time.Abs(Math.min(car.getOperationalPlan().getEndTime().getSI(), x + useTimeGranularity),
                     // SECOND);
                     // double xAtCellStartTime = initialPosition.si + initialSpeed.si * cellStartTime.si;
                     // double xAtCellEndTime = initialPosition.si + initialSpeed.si * cellEndTime.si;
                     // System.out.println("cellStartTime=" + cellStartTime + " cellEndTime=" + cellEndTime
                     // + " xAtCellStartTime=" + xAtCellStartTime + " xAtCellEndTime=" + xAtCellEndTime);
                     // double cellX = cp.getXValue(0, item);
                     // double cellY = cp.getYValue(0, item);
                     // double cellZ = cp.getZValue(0, item);
                     // System.out.println("cellX=" + cellX + " cellY=" + cellY + " cellZ=" + cellZ + " timeGranularity="
                     // + useTimeGranularity + " distanceGranularity=" + useDistanceGranularity);
                     // cp.getZValue(0, item);
                     // }
                     assertTrue("Z value should be NaN", Double.isNaN(z));
                 }
                 else
                 {
                     assertEquals("Z value should be " + expectedZValue, expectedZValue, z, 0.0001);
                 }
                 if (Double.isNaN(expectedZValue))
                 {
                     assertTrue("Alternate Z value should be NaN", Double.isNaN(alternateZ.doubleValue()));
                 }
                 else
                 {
                     assertEquals("Alternate Z value should be " + expectedZValue, expectedZValue,
                         alternateZ.doubleValue(), 0.0000);
                 }
             }
         }
         // System.out.println("Running simulator from " + simulator.getSimulatorTime().get() + " to "
         // + gtuFollowingModel.timeAfterCompletionOfStep(1));
         stopTime = gtuFollowingModel.timeAfterCompletionOfStep(1).si;
         simulator.runUpToAndIncluding(new Time.Abs(stopTime, TimeUnit.SI));
         while (simulator.isRunning())
         {
             try
             {
                 Thread.sleep(10);
             }
             catch (InterruptedException ie)
             {
                 ie = null; // ignore
             }
         }
         // System.out.println("Simulator is now at " + simulator.getSimulatorTime().get());
         // Check that the time range has expanded
         xBins = cp.xAxisBins();
         bins = cp.getItemCount(0);
         double observedHighestTime = Double.MIN_VALUE;
         for (int bin = 0; bin < bins; bin++)
         {
             double xValue = cp.getXValue(0, bin);
             if (xValue > observedHighestTime)
             {
                 observedHighestTime = xValue;
             }
         }
         double expectedHighestTime =
             Math.floor((car.getSimulator().getSimulatorTime().get().si - 0.001) / useTimeGranularity)
                 * useTimeGranularity;
         assertEquals("Time range should run up to " + expectedHighestTime, expectedHighestTime, observedHighestTime,
             0.0001);
         // Check the updateHint method in the PointerHandler
         // First get the panel that stores the result of updateHint (this is ugly)
         JLabel hintPanel = null;
         ChartPanel chartPanel = null;
         for (Component c0 : cp.getComponents())
         {
             for (Component c1 : ((Container) c0).getComponents())
             {
                 if (c1 instanceof Container)
                 {
                     for (Component c2 : ((Container) c1).getComponents())
                     {
                         // System.out.println("c2 is " + c2);
                         if (c2 instanceof Container)
                         {
                             for (Component c3 : ((Container) c2).getComponents())
                             {
                                 // System.out.println("c3 is " + c3);
                                 if (c3 instanceof JLabel)
                                 {
                                     if (null == hintPanel)
                                     {
                                         hintPanel = (JLabel) c3;
                                     }
                                     else
                                     {
                                         fail("There should be only one JPanel in a ContourPlot");
                                     }
                                 }
                                 if (c3 instanceof ChartPanel)
                                 {
                                     if (null == chartPanel)
                                     {
                                         chartPanel = (ChartPanel) c3;
                                     }
                                     else
                                     {
                                         fail("There should be only one ChartPanel in a ContourPlot");
                                     }
                                 }
                             }
                         }
                     }
                 }
             }
         }
         if (null == hintPanel)
         {
             fail("Could not find a JLabel in ContourPlot");
         }
         if (null == chartPanel)
         {
             fail("Could not find a ChartPanel in ContourPlot");
         }
         assertEquals("Initially the text should be a single space", " ", hintPanel.getText());
         PointerHandler ph = null;
         for (MouseListener ml : chartPanel.getMouseListeners())
         {
             if (ml instanceof PointerHandler)
             {
                 if (null == ph)
                 {
                     ph = (PointerHandler) ml;
                 }
                 else
                 {
                     fail("There should be only one PointerHandler on the chartPanel");
                 }
             }
         }
         if (null == ph)
         {
             fail("Could not find the PointerHandler for the chartPanel");
         }
         ph.updateHint(1, 2);
         // System.out.println("Hint text is now " + hintPanel.getText());
         assertFalse("Hint should not be a single space", " ".equals(hintPanel.getText()));
         ph.updateHint(Double.NaN, Double.NaN);
         assertEquals("The text should again be a single space", " ", hintPanel.getText());
     }
 
     /**
      * Run the DensityContourPlot stand-alone for profiling.
      * @param args String[]; the command line arguments (not used)
      * @throws Exception when something goes wrong (should not happen)
      */
     public static void main(final String[] args) throws Exception
     {
         ContourPlotTest cpt = new ContourPlotTest();
         System.out.println("Click the OK button");
         JOptionPane.showMessageDialog(null, "ContourPlot", "Start experiment", JOptionPane.INFORMATION_MESSAGE);
         System.out.println("Running ...");
         cpt.densityContourTest();
         System.out.println("Finished");
     }
 
 }
 
 /**
  * <p>
  * Copyright (c) 2013-2015 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
  * BSD-style license. See <a href="http://opentrafficsim.org/docs/license.html">OpenTrafficSim License</a>.
  * <p>
  * $LastChangedDate: 2015-09-14 01:33:02 +0200 (Mon, 14 Sep 2015) $, @version $Revision: 1401 $, by $Author: averbraeck $,
  * initial version feb. 2015 <br>
  * @author <a href="http://www.tudelft.nl/pknoppers">Peter Knoppers</a>
  */
 class ContourPlotModel implements OTSModelInterface
 {
 
     /** */
     private static final long serialVersionUID = 20150209L;
 
     /** {@inheritDoc} */
     @Override
     public void constructModel(
         SimulatorInterface<DoubleScalar.Abs<TimeUnit>, DoubleScalar.Rel<TimeUnit>, OTSSimTimeDouble> simulator)
         throws SimRuntimeException
     {
         // NOT USED
     }
 
     /** {@inheritDoc} */
     @Override
     public SimulatorInterface<DoubleScalar.Abs<TimeUnit>, DoubleScalar.Rel<TimeUnit>, OTSSimTimeDouble> getSimulator()
 
     {
         return null;
     }
 
 }