/**
* Every time the zoom level changes this method is called. Override it in derived implementations
* for adapting zoom dependent values. The new zoom level can be obtained via {@link #getZoom()}.
*
* @param oldZoom the previous zoom level
*/
protected void zoomChanged(int oldZoom) {
zoomSlider.setToolTipText("Zoom level " + zoom);
zoomInButton.setToolTipText("Zoom to level " + (zoom + 1));
zoomOutButton.setToolTipText("Zoom to level " + (zoom - 1));
zoomOutButton.setEnabled(zoom > tileController.getTileSource().getMinZoom());
zoomInButton.setEnabled(zoom < tileController.getTileSource().getMaxZoom());
fireMapViewChanged();
}
public void setZoom(int zoom, Point mapPoint) {
if (zoom > tileController.getTileSource().getMaxZoom()
|| zoom < tileController.getTileSource().getMinZoom()
|| zoom == this.zoom) return;
Coordinate zoomPos = getPosition(mapPoint);
tileController.cancelOutstandingJobs(); // Clearing outstanding load
// requests
setDisplayPositionByLatLon(mapPoint, zoomPos.getLat(), zoomPos.getLon(), zoom);
}
public void setTileSource(TileSource tileSource) {
if (tileSource.getMaxZoom() > MAX_ZOOM)
throw new RuntimeException("Maximum zoom level too high");
if (tileSource.getMinZoom() < MIN_ZOOM)
throw new RuntimeException("Minumim zoom level too low");
tileController.setTileSource(tileSource);
zoomSlider.setMinimum(tileSource.getMinZoom());
zoomSlider.setMaximum(tileSource.getMaxZoom());
tileController.cancelOutstandingJobs();
if (zoom > tileSource.getMaxZoom()) setZoom(tileSource.getMaxZoom());
repaint();
}
protected void initializeZoomSlider() {
zoomSlider = new JSlider(MIN_ZOOM, tileController.getTileSource().getMaxZoom());
zoomSlider.setOrientation(JSlider.VERTICAL);
zoomSlider.setBounds(10, 10, 30, 150);
zoomSlider.setOpaque(false);
zoomSlider.addChangeListener(
new ChangeListener() {
public void stateChanged(ChangeEvent e) {
setZoom(zoomSlider.getValue());
}
});
add(zoomSlider);
int size = 18;
try {
ImageIcon icon = new ImageIcon(getClass().getResource("images/plus.png"));
zoomInButton = new JButton(icon);
} catch (Exception e) {
zoomInButton = new JButton("+");
zoomInButton.setFont(new Font("sansserif", Font.BOLD, 9));
zoomInButton.setMargin(new Insets(0, 0, 0, 0));
}
zoomInButton.setBounds(4, 155, size, size);
zoomInButton.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
zoomIn();
}
});
add(zoomInButton);
try {
ImageIcon icon = new ImageIcon(getClass().getResource("images/minus.png"));
zoomOutButton = new JButton(icon);
} catch (Exception e) {
zoomOutButton = new JButton("-");
zoomOutButton.setFont(new Font("sansserif", Font.BOLD, 9));
zoomOutButton.setMargin(new Insets(0, 0, 0, 0));
}
zoomOutButton.setBounds(8 + size, 155, size, size);
zoomOutButton.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
zoomOut();
}
});
add(zoomOutButton);
}
public void setDisplayPosition(Point mapPoint, int x, int y, int zoom) {
if (zoom > tileController.getTileSource().getMaxZoom() || zoom < MIN_ZOOM) return;
// Get the plain tile number
Point p = new Point();
p.x = x - mapPoint.x + getWidth() / 2;
p.y = y - mapPoint.y + getHeight() / 2;
center = p;
setIgnoreRepaint(true);
try {
int oldZoom = this.zoom;
this.zoom = zoom;
if (oldZoom != zoom) zoomChanged(oldZoom);
if (zoomSlider.getValue() != zoom) zoomSlider.setValue(zoom);
} finally {
setIgnoreRepaint(false);
repaint();
}
}
/** Sets the displayed map pane and zoom level so that all map markers are visible. */
public void setDisplayToFitMapRectangle() {
if (mapRectangleList == null || mapRectangleList.size() == 0) {
return;
}
int x_min = Integer.MAX_VALUE;
int y_min = Integer.MAX_VALUE;
int x_max = Integer.MIN_VALUE;
int y_max = Integer.MIN_VALUE;
int mapZoomMax = tileController.getTileSource().getMaxZoom();
for (MapRectangle rectangle : mapRectangleList) {
x_max = Math.max(x_max, OsmMercator.LonToX(rectangle.getBottomRight().getLon(), mapZoomMax));
y_max = Math.max(y_max, OsmMercator.LatToY(rectangle.getTopLeft().getLat(), mapZoomMax));
x_min = Math.min(x_min, OsmMercator.LonToX(rectangle.getTopLeft().getLon(), mapZoomMax));
y_min = Math.min(y_min, OsmMercator.LatToY(rectangle.getBottomRight().getLat(), mapZoomMax));
}
int height = Math.max(0, getHeight());
int width = Math.max(0, getWidth());
// System.out.println(x_min + " < x < " + x_max);
// System.out.println(y_min + " < y < " + y_max);
// System.out.println("tiles: " + width + " " + height);
int newZoom = mapZoomMax;
int x = x_max - x_min;
int y = y_max - y_min;
while (x > width || y > height) {
// System.out.println("zoom: " + zoom + " -> " + x + " " + y);
newZoom--;
x >>= 1;
y >>= 1;
}
x = x_min + (x_max - x_min) / 2;
y = y_min + (y_max - y_min) / 2;
int z = 1 << (mapZoomMax - newZoom);
x /= z;
y /= z;
setDisplayPosition(x, y, newZoom);
}
public void setTileLoader(TileLoader loader) {
tileController.setTileLoader(loader);
}
/* (non-Javadoc)
* @see org.openstreetmap.gui.jmapviewer.interfaces.TileLoaderListener#getTileCache()
*/
public TileCache getTileCache() {
return tileController.getTileCache();
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
int iMove = 0;
int tilex = center.x / Tile.SIZE;
int tiley = center.y / Tile.SIZE;
int off_x = (center.x % Tile.SIZE);
int off_y = (center.y % Tile.SIZE);
int w2 = getWidth() / 2;
int h2 = getHeight() / 2;
int posx = w2 - off_x;
int posy = h2 - off_y;
int diff_left = off_x;
int diff_right = Tile.SIZE - off_x;
int diff_top = off_y;
int diff_bottom = Tile.SIZE - off_y;
boolean start_left = diff_left < diff_right;
boolean start_top = diff_top < diff_bottom;
if (start_top) {
if (start_left) iMove = 2;
else iMove = 3;
} else {
if (start_left) iMove = 1;
else iMove = 0;
} // calculate the visibility borders
int x_min = -Tile.SIZE;
int y_min = -Tile.SIZE;
int x_max = getWidth();
int y_max = getHeight();
// paint the tiles in a spiral, starting from center of the map
boolean painted = true;
int x = 0;
while (painted) {
painted = false;
for (int i = 0; i < 4; i++) {
if (i % 2 == 0) x++;
for (int j = 0; j < x; j++) {
if (x_min <= posx && posx <= x_max && y_min <= posy && posy <= y_max) {
// tile is visible
Tile tile = tileController.getTile(tilex, tiley, zoom);
if (tile != null) {
painted = true;
tile.paint(g, posx, posy);
if (tileGridVisible) g.drawRect(posx, posy, Tile.SIZE, Tile.SIZE);
}
}
Point p = move[iMove];
posx += p.x * Tile.SIZE;
posy += p.y * Tile.SIZE;
tilex += p.x;
tiley += p.y;
}
iMove = (iMove + 1) % move.length;
}
}
for (OverlayPainter op : overlayPainterList) {
op.paintOverlay(g);
}
// outer border of the map
int mapSize = Tile.SIZE << zoom;
g.drawRect(w2 - center.x, h2 - center.y, mapSize, mapSize);
// g.drawString("Tiles in cache: " + tileCache.getTileCount(), 50, 20);
if (mapRectanglesVisible && mapRectangleList != null) {
for (MapRectangle rectangle : mapRectangleList) {
Coordinate topLeft = rectangle.getTopLeft();
Coordinate bottomRight = rectangle.getBottomRight();
if (topLeft != null && bottomRight != null) {
Point pTopLeft = getMapPosition(topLeft.getLat(), topLeft.getLon(), false);
Point pBottomRight = getMapPosition(bottomRight.getLat(), bottomRight.getLon(), false);
if (pTopLeft != null && pBottomRight != null) {
rectangle.paint(g, pTopLeft, pBottomRight);
}
}
}
}
if (mapMarkersVisible && mapMarkerList != null) {
for (MapMarker marker : mapMarkerList) {
Point p = getMapPosition(marker.getLat(), marker.getLon());
if (p != null) {
marker.paint(g, p);
}
}
}
}
