Sample6.java

package sample6_mapkit;

import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import java.awt.geom.Point2D;

import javax.swing.JFrame;
import javax.swing.JToolTip;

import org.jxmapviewer.JXMapKit;
import org.jxmapviewer.JXMapViewer;
import org.jxmapviewer.OSMTileFactoryInfo;
import org.jxmapviewer.viewer.DefaultTileFactory;
import org.jxmapviewer.viewer.GeoPosition;
import org.jxmapviewer.viewer.TileFactoryInfo;

/**
 * A simple sample application that uses JXMapKit
 * @author Martin Steiger
 */
public class Sample6
{
    /**
     * @param args the program args (ignored)
     */
    public static void main(String[] args)
    {
        final JXMapKit jXMapKit = new JXMapKit();
        TileFactoryInfo info = new OSMTileFactoryInfo();
        DefaultTileFactory tileFactory = new DefaultTileFactory(info);
        jXMapKit.setTileFactory(tileFactory);

        //location of Java
        final GeoPosition gp = new GeoPosition(-7.502778, 111.263056); 

        final JToolTip tooltip = new JToolTip();
        tooltip.setTipText("Java");
        tooltip.setComponent(jXMapKit.getMainMap());
        jXMapKit.getMainMap().add(tooltip);

        jXMapKit.setZoom(11);
        jXMapKit.setAddressLocation(gp);

        jXMapKit.getMainMap().addMouseMotionListener(new MouseMotionListener() {
            @Override
            public void mouseDragged(MouseEvent e) { 
                // ignore
            }

            @Override
            public void mouseMoved(MouseEvent e)
            {
                JXMapViewer map = jXMapKit.getMainMap();

                // convert to world bitmap
                Point2D worldPos = map.getTileFactory().geoToPixel(gp, map.getZoom());

                // convert to screen
                Rectangle rect = map.getViewportBounds();
                int sx = (int) worldPos.getX() - rect.x;
                int sy = (int) worldPos.getY() - rect.y;
                Point screenPos = new Point(sx, sy);

                // check if near the mouse
                if (screenPos.distance(e.getPoint()) < 20)
                {
                    screenPos.x -= tooltip.getWidth() / 2;

                    tooltip.setLocation(screenPos);
                    tooltip.setVisible(true);
                }
                else
                {
                    tooltip.setVisible(false);
                }
            }
        });

        // Display the viewer in a JFrame
        JFrame frame = new JFrame("JXMapviewer2 Example 6");
        frame.getContentPane().add(jXMapKit);
        frame.setSize(800, 600);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}