package org.opentrafficsim.road.network.animation;
   
   import java.awt.Color;
   import java.awt.Graphics2D;
   import java.awt.geom.Ellipse2D;
   import java.awt.image.ImageObserver;
   import java.io.Serializable;
   import java.rmi.RemoteException;
   
  import javax.naming.NamingException;
  
  import org.djunits.unit.SpeedUnit;
  import org.opentrafficsim.core.dsol.OTSSimulatorInterface;
  import org.opentrafficsim.road.network.lane.object.SpeedSign;
  
  import nl.tudelft.simulation.dsol.animation.D2.Renderable2D;
  
  /**
   * <p>
   * Copyright (c) 2013-2016 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/node/13">OpenTrafficSim License</a>.
   * <p>
   * @version $Revision$, $LastChangedDate$, by $Author$, initial version 20 apr. 2017 <br>
   * @author <a href="http://www.tbm.tudelft.nl/averbraeck">Alexander Verbraeck</a>
   * @author <a href="http://www.tudelft.nl/pknoppers">Peter Knoppers</a>
   * @author <a href="http://www.transport.citg.tudelft.nl">Wouter Schakel</a>
   */
  
  public class SpeedSignAnimation extends Renderable2D<SpeedSign> implements Serializable
  {
  
      /** */
      private static final long serialVersionUID = 20170420L;
  
      /** Radius in meters. */
      private static final double RADIUS = 1.6;
  
      /** Radius in meters. */
      private static final double EDGE = 0.8;
  
      /** Scaling for text. */
      private static final double TEXT_SCALE = 0.14;
  
      /**
       * @param source speed sign
       * @param simulator simulator
       * @throws NamingException ne
       * @throws RemoteException on communication failure
       */
      public SpeedSignAnimation(final SpeedSign source, final OTSSimulatorInterface simulator)
              throws NamingException, RemoteException
      {
          super(source, simulator);
      }
  
      /** {@inheritDoc} */
      @Override
      public void paint(final Graphics2D arg0, final ImageObserver arg1) throws RemoteException
      {
          SpeedSign sign = getSource();
          double r = RADIUS;
          Ellipse2D ellipse = new Ellipse2D.Double(-r, -r, 2 * r, 2 * r);
          arg0.setColor(Color.RED);
          arg0.fill(ellipse);
          r *= EDGE;
          ellipse = new Ellipse2D.Double(-r, -r, 2 * r, 2 * r);
          arg0.setColor(Color.WHITE);
          arg0.fill(ellipse);
          arg0.setColor(Color.BLACK);
          arg0.scale(TEXT_SCALE, TEXT_SCALE);
          String str = Integer.toString((int) sign.getSpeed().getInUnit(SpeedUnit.KM_PER_HOUR));
          int width = arg0.getFontMetrics().stringWidth(str);
          int height = arg0.getFontMetrics().getAscent();
          // not sure why 0.7 is required, getAscent() alone is weird and refers to more than the height of numbers
          arg0.drawString(str, (float) (-.5 * width), (float) (0.5 * 0.7 * height));
          arg0.scale(1.0 / TEXT_SCALE, 1.0 / TEXT_SCALE);
      }
  
      /** {@inheritDoc} */
      @Override
      public String toString()
      {
          return "SpeedSignAnimation";
      }
  
  }