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This project is based on the JXMapViewer component of SwingX-WS.

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/*
 * WaypointMapOverlay.java
 *
 * Created on April 1, 2006, 4:59 PM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package org.jdesktop.swingx.mapviewer;

import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import org.jdesktop.swingx.JXMapViewer;
import org.jdesktop.swingx.painter.AbstractPainter;

/**
 * Paints waypoints on the JXMapViewer. This is an 
 * instance of Painter that only can draw on to JXMapViewers.
 * @param  the waypoint type
 * @author rbair
 */
public class WaypointPainter extends AbstractPainter
{
	private WaypointRenderer renderer = new DefaultWaypointRenderer();
	private Set waypoints = new HashSet();

	/**
	 * Creates a new instance of WaypointPainter
	 */
	public WaypointPainter()
	{
		setAntialiasing(true);
		setCacheable(false);
	}

	/**
	 * Sets the waypoint renderer to use when painting waypoints
	 * @param r the new WaypointRenderer to use
	 */
	public void setRenderer(WaypointRenderer r)
	{
		this.renderer = r;
	}

	/**
	 * Gets the current set of waypoints to paint
	 * @return a typed Set of Waypoints
	 */
	public Set getWaypoints()
	{
		return Collections.unmodifiableSet(waypoints);
	}

	/**
	 * Sets the current set of waypoints to paint
	 * @param waypoints the new Set of Waypoints to use
	 */
	public void setWaypoints(Set waypoints)
	{
		this.waypoints.clear();
		this.waypoints.addAll(waypoints);
	}

	@Override
	protected void doPaint(Graphics2D g, JXMapViewer map, int width, int height)
	{
		if (renderer == null)
		{
			return;
		}

		Rectangle viewportBounds = map.getViewportBounds();

		g.translate(-viewportBounds.getX(), -viewportBounds.getY());

		for (W w : getWaypoints())
		{
			renderer.paintWaypoint(g, map, w);
		}

		g.translate(viewportBounds.getX(), viewportBounds.getY());

	}

}