/**
* 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);
}
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);
}
