org.eclipse.nebula.widgets.geomap

Class GeoMapUtil

java.lang.Object

org.eclipse.nebula.widgets.geomap.GeoMapUtil

public class GeoMapUtil
extends java.lang.Object

Since:

3.3

Constructor Summary

Constructors

Constructor and Description
GeoMapUtil()

Method Summary

Modifier and Type	Method and Description
static org.eclipse.swt.graphics.Point	computePosition(PointD coords, int zoom) Returns the position at a certain zoom level for a pair of longitude, latitude
static PointD	getLongitudeLatitude(org.eclipse.swt.graphics.Point position, int zoom) Returns the pair of longitude, latitude for a position at a certain zoom level
static int	lat2position(double lat, int z) Converts latitude to y position.
static int	lon2position(double lon, int z) Converts longitude to x position.
static double	position2lat(int y, int z) Converts position to latitude.
static double	position2lon(int x, int z) Converts position to longitude.
static void	translateMapPosition(GeoMapPositioned geoMap, int tx, int ty) Translates the position of the upper left corner of this GeoMap, without any panning effect.
static void	zoomIn(GeoMapPositioned geoMap, org.eclipse.swt.graphics.Point pivot) Zooms in, while ensuring that the pivot point remains at the same screen location.
static void	zoomOut(GeoMapPositioned geoMap, org.eclipse.swt.graphics.Point pivot) Zooms out, while ensuring that the pivot point remains at the same screen location.
static void	zoomTo(GeoMapPositioned geoMap, org.eclipse.swt.graphics.Point mapSize, org.eclipse.swt.graphics.Rectangle rect, int maxZoom) Zooms into and centers on the specified rectangle.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GeoMapUtil

public GeoMapUtil()

Method Detail

getLongitudeLatitude

public static PointD getLongitudeLatitude(org.eclipse.swt.graphics.Point position,
                                          int zoom)

Returns the pair of longitude, latitude for a position at a certain zoom level

Parameters:

position - the position

zoom - the zoom level

Returns:

the pair of longitude, latitude as a PointD

computePosition

public static org.eclipse.swt.graphics.Point computePosition(PointD coords,
                                                             int zoom)

Returns the position at a certain zoom level for a pair of longitude, latitude

Parameters:

coords - the pair of longitude, latitude

zoom - the zoom level

Returns:

the position as a Point

position2lon

public static double position2lon(int x,
                                  int z)

Converts position to longitude.

Parameters:

x - position x coord (pixels in this swt control)

z - the current zoom level.

Returns:

the longitude

position2lat

public static double position2lat(int y,
                                  int z)

Converts position to latitude.

Parameters:

y - position y coord (pixels in this swt control)

z - the current zoom level.

Returns:

the latitude

lon2position

public static int lon2position(double lon,
                               int z)

Converts longitude to x position.

Parameters:

lon - the longitude

z - the zoom level.

Returns:

the x position

lat2position

public static int lat2position(double lat,
                               int z)

Converts latitude to y position.

Parameters:

lat - the latitude

z - the zoom level.

Returns:

the y position

translateMapPosition

public static void translateMapPosition(GeoMapPositioned geoMap,
                                        int tx,
                                        int ty)

Translates the position of the upper left corner of this GeoMap, without any panning effect.

Parameters:

geoMap - the geoMap

tx - the relative distance in x-direction

ty - the relative distance in y-direction

zoomIn

public static void zoomIn(GeoMapPositioned geoMap,
                          org.eclipse.swt.graphics.Point pivot)

Zooms in, while ensuring that the pivot point remains at the same screen location.

Parameters:

geoMap - the geoMap

pivot - the point that will remain at the same screen location.

zoomOut

public static void zoomOut(GeoMapPositioned geoMap,
                           org.eclipse.swt.graphics.Point pivot)

Zooms out, while ensuring that the pivot point remains at the same screen location.

Parameters:

geoMap - the geoMap

pivot - the point that will remain at the same screen location.

zoomTo

public static void zoomTo(GeoMapPositioned geoMap,
                          org.eclipse.swt.graphics.Point mapSize,
                          org.eclipse.swt.graphics.Rectangle rect,
                          int maxZoom)

Zooms into and centers on the specified rectangle.

Parameters:

geoMap - the geoMap

mapSize - the size of the map, containes the zoom rectangle

rect - the rectangle

maxZoom - the maximum level to zoom to, or -1 to default to the geoMap's max zoom