[OpenMap Users] Working with OMGraphicHandlerLayer

Hello,

I'm attempting to use OMGraphicHandlerLayer, and I used the simple example of wallpapering the map with 5 degree by 5 degree OMRects. I modeled the class after the GraticuleLayer, but I can't seem to get my class to display. GraticuleLayer displays, and my class does not. I've attached the code below. Any ideas?

Thanks,
 Brian

//BEGIN CODE

import com.bbn.openmap.event.ProjectionEvent;
import com.bbn.openmap.layer.OMGraphicHandlerLayer;
import com.bbn.openmap.layer.policy.BufferedImageRenderPolicy;
import com.bbn.openmap.omGraphics.OMGraphicList;
import com.bbn.openmap.omGraphics.OMRect;
import com.bbn.openmap.proj.Projection;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Point;

import static com.bbn.openmap.omGraphics.OMGraphicConstants.*;

public class OverlayLayer extends OMGraphicHandlerLayer
{
 private OMGraphicList omgraphics;
 
 public OverlayLayer()
 {
  int scale = 5;
  omgraphics = new OMGraphicList();
  
  //Create 5 degree by 5 degree rectangles
  for(int i=-90; i<90; i+=scale)
   for(int j=-180; j<180; j+=scale)
   {
    OMRect r = new OMRect((float)i+scale,(float)j,(float)i,(float)j+scale, LINETYPE_RHUMB);
    r.setFillPaint(new Color(1.0f, 0.5f, 0.0f, 0.5f));
    omgraphics.add(r);
   }
  
  //Generate all rectangles
  omgraphics.generate(super.getProjection());
  setRenderPolicy(new BufferedImageRenderPolicy());
  repaint();
 }
 public synchronized void renderDataForProjection(Projection proj, Graphics g)
 {
  if (proj == null) return;
  
  if (!proj.equals(getProjection()))
  {
   setProjection(proj.makeClone());
   setList(getVisibleRectList());
  }
  paint(g);
 }
 
 private OMGraphicList getVisibleRectList()
  //This function returns only OMRects that have at least one corner visible
  //on the screen.
 {
  OMGraphicList toRender = new OMGraphicList();
  Projection p = super.getProjection();
  if(p==null) return null;
  
  for(int a=0; a<omgraphics.size(); a++)
  {
   OMRect omr = (OMRect)omgraphics.getOMGraphicAt(a);
   
   float s = omr.getSouthLat();
   float w = omr.getWestLon();
   float n = omr.getNorthLat();
   float e = omr.getEastLon();
   
   if( isVisible(p,n,e) ||
      isVisible(p,n,w) ||
      isVisible(p,s,e) ||
      isVisible(p,s,w))
   {
    toRender.add(omr);
   }
  }
  return toRender;
 }
 
 public synchronized OMGraphicList prepare()
 {
  OMGraphicList ogl = getVisibleRectList();
  setList(ogl);
  return ogl;
 }
 
 private boolean isVisible(Projection proj, float lat, float lon)
 {
  //returns true if the point is visible
  //From the openmap-users archive
  Point p = proj.forward(lat, lon);
  return
   p.getX() >=0 &&
   p.getX() < proj.getWidth() &&
   p.getY() >= 0 &&
   p.getY() < proj.getHeight();
 }
 
 public void projectionChanged(ProjectionEvent p1)
 {
  Projection proj = setProjection(p1);
  if (proj == null)
  {
   repaint();
   return;
  }
  
  setList(null);
  doPrepare();
 }
}

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