Subversion Repositories Projects

package dongfang.mkt.ui.offscreendisplay;

/*

 * u/l:         geotagged geo:lat=47.327450 geo:lon=8.521657

 * l/r:         geotagged geo:lat=47.321749 geo:lon=8.534403

 * house:       geotagged geo:lat=47.324614 geo:lon=8.528202

 */

import java.awt.Color;

import java.awt.Graphics;

import java.awt.Image;

import java.awt.Toolkit;

import javax.swing.JFrame;

import javax.swing.JPanel;

import dongfang.mkt.datatype.GPSPosition;

public class MapImageView extends JPanel {

        private Image mapImage;

        private Image copterImage;

        private static final int MAPWIDTH = 600;

        private static final int MAPHEIGHT = 400;

        // It is assumed the map is north/south oriented!

        private GPSPosition upperLeft;

        private GPSPosition lowerRight;

        private GPSPosition hightlightPosition;

        public MapImageView(GPSPosition upperLeft, GPSPosition lowerRight, String imageFileName) {

                setSize(MAPWIDTH, MAPHEIGHT);

                this.upperLeft = upperLeft;

                this.lowerRight = lowerRight;

                mapImage = Toolkit.getDefaultToolkit().getImage(imageFileName);

        }

        private double relativeX(GPSPosition pos) {

                double lon = pos.getLongitude();

                // The sign should be OK here (positive) both east and west.

                double span = lowerRight.getLongitude() - upperLeft.getLongitude();

                double offset = lon - upperLeft.getLongitude();

                return offset / span;

        }

        private double relativeY(GPSPosition pos) {

                double lat = pos.getLatitude();

                // The sign should be OK here (positive) both east and west.

                double span = lowerRight.getLatitude() - upperLeft.getLatitude();

                double offset = lat - upperLeft.getLatitude();

                return offset / span;

        }

        public void paintComponent(Graphics g) {

                // Draw our Image object.

                g.drawImage(mapImage, 0, 0, MAPWIDTH, MAPHEIGHT, this); // at location

                g.setColor(Color.red);

                int x = (int)(MAPWIDTH * relativeX(hightlightPosition) + 0.5);

                int y = (int)(MAPHEIGHT * relativeY(hightlightPosition) + 0.5);

                g.drawArc(x, y, 20, 20, 0, 360);

        }

        public static void main(String[] args) {

                GPSPosition upperLeft = new GPSPosition();

                GPSPosition lowerRight = new GPSPosition();

                GPSPosition highlight = new GPSPosition();

                upperLeft.setLatitude(47.327450);

                upperLeft.setLongitude(8.521657);

                // * l/r:               geotagged geo:lat=47.321749 geo:lon=8.534403

                lowerRight.setLatitude(47.321749);

                lowerRight.setLongitude(8.534403);

                // geotagged geo:lat=47.324614 geo:lon=8.528202 

                highlight.setLatitude(47.324714);

                highlight.setLongitude(8.528102);

                MapImageView v = new MapImageView(upperLeft, lowerRight, "flugplatz_small.png");

                v.hightlightPosition = highlight;

                JFrame f = new JFrame();

                f.getContentPane().add(v);

                f.setSize(v.getSize());

                f.setVisible(true);

        }

}