OsmAnd/DataExtractionOSM/src/com/osmand/MapPanel.java

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Java
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package com.osmand;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Point;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import java.net.UnknownHostException;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Stack;
import javax.imageio.IIOException;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.osmand.DataExtraction.ExitListener;
import com.osmand.data.DataTileManager;
import com.osmand.osm.LatLon;
import com.osmand.osm.MapUtils;
public class MapPanel extends JPanel {
private static final long serialVersionUID = 1L;
private static final Log log = LogFactory.getLog(MapPanel.class);
public static void main(String[] args) throws IOException {
JFrame frame = new JFrame("Tree of choose");
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
e.printStackTrace();
}
frame.addWindowListener(new ExitListener());
Container content = frame.getContentPane();
MapPanel panel = new MapPanel(new File(DefaultLauncherConstants.pathToDirWithTiles));
content.add(panel, BorderLayout.CENTER);
frame.setSize(512, 512);
frame.setVisible(true);
}
// name of source map
private String map = "Mapnik";
// tile size of map
private final int tileSize = 256;
// file name with tiles
private final File fileWithTiles;
// special points to draw
private DataTileManager<LatLon> points;
// zoom levle
private int zoom = 15;
// degree measurements (-180, 180)
// долгота
private double longitude = 27.56;
// широта
// degree measurements (90, -90)
private double latitude = 53.9;
private List<IMapLocationListener> listeners = new ArrayList<IMapLocationListener>();
// cached data to draw image
private Image[][] images;
private int xStartingImage = 0;
private int yStartingImage = 0;
private List<Point> pointsToDraw = new ArrayList<Point>();
private AsyncLoadTileThread autoThread = new AsyncLoadTileThread();
Map<String, Image> cache = new HashMap<String, Image>();
public MapPanel(File fileWithTiles) {
this.fileWithTiles = fileWithTiles;
autoThread.start();
initUI();
}
public double getXTile(){
return MapUtils.getTileNumberX(zoom, longitude);
}
public double getYTile(){
return MapUtils.getTileNumberY(zoom, latitude);
}
@Override
protected void paintComponent(Graphics g) {
if (images != null) {
for (int i = 0; i < images.length; i++) {
for (int j = 0; j < images[i].length; j++) {
if(images[i][j] == null){
int div = 4;
int tileDiv = tileSize / div;
for(int k1 = 0; k1 < div; k1++){
for(int k2 = 0; k2 < div; k2++){
if ((k1 + k2) % 2 == 0) {
g.setColor(Color.gray);
} else {
g.setColor(Color.white);
}
g.fillRect(i * tileSize+xStartingImage + k1*tileDiv,
j * tileSize + yStartingImage + k2*tileDiv, tileDiv, tileDiv);
}
}
} else {
g.drawImage(images[i][j], i * tileSize+xStartingImage, j * tileSize + yStartingImage, this);
}
}
}
}
g.setColor(Color.black);
// draw user points
for(Point p : pointsToDraw){
g.drawOval(p.x, p.y, 3, 3);
g.fillOval(p.x, p.y, 3, 3);
}
String s = MessageFormat.format("Lat : {0}, lon : {1}, zoom : {2}",latitude, longitude, zoom);
g.drawString(s, 5, 20);
g.fillOval(getWidth()/2 - 2, getHeight()/2 -2, 4, 4);
g.drawOval(getWidth()/2 - 2, getHeight()/2 -2, 4, 4);
g.drawOval(getWidth()/2 - 5, getHeight()/2 -5, 10, 10);
}
public String getFile(int zoom, int x, int y){
return map +"/"+zoom+"/"+(x) +"/"+y+".png";
}
public Image getImageFor(int x, int y) throws IOException{
String file = getFile(zoom, x, y);
if(!cache.containsKey(file)){
// ZipEntry en = fileWithTiles.getEntry(file);
File en = new File(fileWithTiles, file);
if(cache.size() > 1000){
ArrayList<String> list = new ArrayList<String>(cache.keySet());
for(int i=0; i<list.size(); i+=2){
cache.remove(list.get(i));
}
}
// if(en != null){
if(en.exists()){
// cache.put(file, ImageIO.read(fileWithTiles.getInputStream(en)));
long time = System.currentTimeMillis();
cache.put(file, ImageIO.read(en));
System.out.println("Loaded " + (System.currentTimeMillis() - time));
} else {
autoThread.requestTileToLoad(zoom, x, y);
}
}
return cache.get(file);
}
public void loadImage(int zoom, int x, int y){
try {
Image img = null;
File en = new File(fileWithTiles, getFile(zoom, x, y));
URL url = new URL("http://tile.openstreetmap.org/" + zoom + "/" + x + "/" + y + ".png");
en.getParentFile().mkdirs();
try {
ImageIO.setUseCache(true);
javax.imageio.ImageIO.setCacheDirectory(en.getParentFile());
} catch (Exception e) {
log.warn("cannot set ImageIO cache-directory to " + en.getParent(), e);
}
try {
URLConnection connection = url.openConnection();
connection.setRequestProperty("User-Agent", "osmand TilePainter/0.1");
img = javax.imageio.ImageIO.read(connection.getInputStream());
} catch (UnknownHostException e) {
log.info("UnknownHostException, cannot download tile " + url.toExternalForm());
} catch (IIOException e) {
if (e.getCause() != null && e.getCause() instanceof UnknownHostException) {
log.info("UnknownHostException, cannot download tile " + url.toExternalForm(), e);
} else {
log.warn("cannot download tile " + url.toExternalForm(), e);
}
}
cache.put(getFile(zoom, x, y), img);
if (img != null) {
try {
ImageIO.write((RenderedImage) img, "png", en);
} catch (IOException e) {
log.warn("cannot save img to " + en.getAbsolutePath(), e);
}
}
} catch (IOException e) {
log.warn("cannot download pre-rendered tile [" + e.getClass().getSimpleName() + "]", e);
}
}
public class AsyncLoadTileThread extends Thread {
Stack<TileIndex> tilesToLoad = new Stack<TileIndex>();
private class TileIndex {
int zoom;
int x;
int y;
}
public AsyncLoadTileThread() {
super("AsyncLoadingTiles");
}
@Override
public void run() {
try {
while (true) {
synchronized (this) {
wait();
}
while (!tilesToLoad.isEmpty()) {
TileIndex p = tilesToLoad.pop();
if (cache.get(getFile(p.zoom, p.x, p.y)) == null) {
loadImage(p.zoom, p.x, p.y);
// TODO dead cycle (causes cancelAllPreviousTile)
prepareImage();
}
}
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
public void cancelAllPreviousTile(){
tilesToLoad.clear();
}
public void requestTileToLoad(int zoom, int x, int y){
synchronized (this) {
TileIndex ind = new TileIndex();
ind.zoom = zoom;
ind.x = x;
ind.y = y;
tilesToLoad.add(ind);
notify();
}
}
}
// TODO async loading images (show busy cursor while it is loaded)
public void prepareImage(){
try {
if (images != null) {
for (int i = 0; i < images.length; i++) {
for (int j = 0; j < images[i].length; j++) {
// dispose
}
}
}
double xTileLeft = getXTile() - getSize().width / (2d * tileSize);
double xTileRight = getXTile() + getSize().width / (2d * tileSize);
double yTileUp = getYTile() - getSize().height / (2d * tileSize);
double yTileDown = getYTile() + getSize().height / (2d * tileSize);
xStartingImage = -(int) ((xTileLeft - Math.floor(xTileLeft)) * tileSize);
yStartingImage = -(int) ((yTileUp - Math.floor(yTileUp)) * tileSize);
autoThread.cancelAllPreviousTile();
int tileXCount = ((int) xTileRight - (int) xTileLeft + 1);
int tileYCount = ((int) yTileDown - (int) yTileUp + 1);
images = new BufferedImage[tileXCount][tileYCount];
for (int i = 0; i < images.length; i++) {
for (int j = 0; j < images[i].length; j++) {
images[i][j] = getImageFor((int) xTileLeft + i, (int) yTileUp + j);
}
}
if (points != null) {
double latDown = MapUtils.getLatitudeFromTile(zoom, yTileDown);
double longDown = MapUtils.getLongitudeFromTile(zoom, xTileRight);
double latUp = MapUtils.getLatitudeFromTile(zoom, yTileUp);
double longUp = MapUtils.getLongitudeFromTile(zoom, xTileLeft);
List<LatLon> objects = points.getObjects(latUp, longUp, latDown, longDown);
pointsToDraw.clear();
for (LatLon n : objects) {
int pixX = MapUtils.getPixelShiftX(zoom, n.getLongitude(), this.longitude, tileSize) + getWidth() / 2;
int pixY = MapUtils.getPixelShiftY(zoom, n.getLatitude(), this.latitude, tileSize) + getHeight() / 2;
if (pixX >= 0 && pixY >= 0) {
pointsToDraw.add(new Point(pixX, pixY));
}
}
}
repaint();
} catch (IOException e) {
e.printStackTrace();
}
}
private void initUI() {
setFocusable(true);
addComponentListener(new ComponentAdapter(){
public void componentResized(ComponentEvent e) {
prepareImage();
}
});
MapMouseAdapter mouse = new MapMouseAdapter();
addMouseListener(mouse);
addMouseMotionListener(mouse);
}
public void setZoom(int zoom){
this.zoom = zoom;
prepareImage();
}
public void setLatLon(double latitude, double longitude){
this.latitude = latitude;
this.longitude = longitude;
prepareImage();
fireMapLocationListeners();
}
public double getLatitude() {
return latitude;
}
public double getLongitude() {
return longitude;
}
public int getZoom() {
return zoom;
}
public String getMap(){
return map;
}
public void setMapName(String map){
this.map = map;
prepareImage();
}
public void addMapLocationListener(IMapLocationListener l){
listeners.add(l);
}
public void removeMapLocationListener(IMapLocationListener l){
listeners.remove(l);
}
protected void fireMapLocationListeners(){
for(IMapLocationListener l : listeners){
l.locationChanged(latitude, longitude, null);
}
}
@Override
protected void processKeyEvent(KeyEvent e) {
boolean processed = false;
if (e.getID() == KeyEvent.KEY_RELEASED) {
if (e.getKeyCode() == 37) {
// LEFT button
longitude = MapUtils.getLongitudeFromTile(zoom, getXTile()-0.5);
processed = true;
} else if (e.getKeyCode() == 39) {
// RIGHT button
longitude = MapUtils.getLongitudeFromTile(zoom, getXTile()+0.5);
processed = true;
} else if (e.getKeyCode() == 38) {
// UP button
latitude = MapUtils.getLatitudeFromTile(zoom, getYTile()-0.5);
processed = true;
} else if (e.getKeyCode() == 40) {
// DOWN button
latitude = MapUtils.getLatitudeFromTile(zoom, getYTile()+0.5);
processed = true;
}
}
if(e.getID() == KeyEvent.KEY_TYPED){
if(e.getKeyChar() == '+'){
if(zoom < 18){
zoom ++;
processed = true;
}
} else if(e.getKeyChar() == '-'){
if(zoom > 1){
zoom --;
processed = true;
}
}
}
if(processed){
e.consume();
prepareImage();
fireMapLocationListeners();
}
super.processKeyEvent(e);
}
public DataTileManager<LatLon> getPoints() {
return points;
}
public void setPoints(DataTileManager<LatLon> points) {
this.points = points;
}
public class MapMouseAdapter extends MouseAdapter {
private Point startDragging = null;
@Override
public void mouseClicked(MouseEvent e) {
if(e.getButton() == MouseEvent.BUTTON1){
requestFocus();
}
}
public void dragTo(Point p){
double dx = (startDragging.x - (double)p.x)/tileSize;
double dy = (startDragging.y - (double)p.y)/tileSize;
double lat = MapUtils.getLatitudeFromTile(zoom, getYTile() + dy);
double lon = MapUtils.getLongitudeFromTile(zoom, getXTile() + dx);
setLatLon(lat, lon);
}
@Override
public void mouseDragged(MouseEvent e) {
if(startDragging != null){
if(Math.abs(e.getPoint().x - startDragging.x) + Math.abs(e.getPoint().y - startDragging.y) >= 8){
dragTo(e.getPoint());
startDragging = e.getPoint();
}
}
}
@Override
public void mousePressed(MouseEvent e) {
if(e.getButton() == MouseEvent.BUTTON3){
if(startDragging == null){
startDragging = e.getPoint();
}
}
}
@Override
public void mouseReleased(MouseEvent e) {
if(e.getButton() == MouseEvent.BUTTON3){
if(startDragging != null){
dragTo(e.getPoint());
fireMapLocationListeners();
startDragging = null;
}
}
super.mouseReleased(e);
}
}
}