org.openstreetmap.josm.gui.layer.imagery

Class TileCoordinateConverter

java.lang.Object

org.openstreetmap.josm.gui.layer.imagery.TileCoordinateConverter

public class TileCoordinateConverter
extends java.lang.Object

This class handles tile coordinate management and computes their position in the map view.

Since:

10651

Field Summary

Fields

Modifier and Type	Field and Description
private MapView	mapView
private TileSourceDisplaySettings	settings
private TileSource	tileSource

Constructor Summary

Constructors

Constructor and Description
TileCoordinateConverter(MapView mapView, TileSource tileSource, TileSourceDisplaySettings settings) Create a new coordinate converter for the map view.

Method Summary

Modifier and Type	Method and Description
java.awt.geom.Point2D	getPixelForTile(int x, int y, int zoom) Gets the top left position of the tile inside the map view.
java.awt.geom.Point2D	getPixelForTile(Tile tile) Gets the top left position of the tile inside the map view.
Projecting	getProjecting() Gets the projecting instance to use to convert between latlon and eastnorth coordinates.
java.awt.geom.Rectangle2D	getRectangleForTile(Tile tile) Gets the position of the tile inside the map view.
double	getScaleFactor(int zoom) Returns average number of screen pixels per tile pixel for current mapview
TileAnchor	getScreenAnchorForTile(Tile tile) Get TileAnchor for a tile in screen pixel coordinates.
TileXY	getTileforPixel(int sx, int sy, int zoom) Convert screen pixel coordinate to tile position at certain zoom level.
java.awt.Shape	getTileShapeScreen(Tile tile) Returns a shape that approximates the outline of the tile in screen coordinates.
private MapViewState.MapViewPoint	pos(ICoordinate ll)
private MapViewState.MapViewPoint	pos(IProjected p)
boolean	requiresReprojection() Return true if tiles need to be reprojected from server projection to display projection.
IProjected	shiftDisplayToServer(EastNorth en) Apply reverse shift to EastNorth coordinate.

Methods inherited from class java.lang.Object

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

Field Detail

mapView

private final MapView mapView

settings

private final TileSourceDisplaySettings settings

tileSource

private final TileSource tileSource

Constructor Detail

TileCoordinateConverter

public TileCoordinateConverter(MapView mapView,
                               TileSource tileSource,
                               TileSourceDisplaySettings settings)

Create a new coordinate converter for the map view.

Parameters:

mapView - The map view.

tileSource - The tile source to use when converting coordinates.

settings - displacement settings.

Throws:

java.lang.NullPointerException - if one argument is null

Method Detail

pos

private MapViewState.MapViewPoint pos(ICoordinate ll)

pos

private MapViewState.MapViewPoint pos(IProjected p)

shiftDisplayToServer

public IProjected shiftDisplayToServer(EastNorth en)

Apply reverse shift to EastNorth coordinate.

Parameters:

en - EastNorth coordinate representing a pixel on screen

Returns:

IProjected coordinate as it would e.g. be sent to a WMS server

getProjecting

public Projecting getProjecting()

Gets the projecting instance to use to convert between latlon and eastnorth coordinates.

Returns:

The Projecting instance.

getPixelForTile

public java.awt.geom.Point2D getPixelForTile(int x,
                                             int y,
                                             int zoom)

Gets the top left position of the tile inside the map view.

Parameters:

x - x tile index

y - y tile index

zoom - zoom level

Returns:

the position

getPixelForTile

public java.awt.geom.Point2D getPixelForTile(Tile tile)

Gets the top left position of the tile inside the map view.

Parameters:

tile - The tile

Returns:

The position.

getTileforPixel

public TileXY getTileforPixel(int sx,
                              int sy,
                              int zoom)

Convert screen pixel coordinate to tile position at certain zoom level.

Parameters:

sx - x coordinate (screen pixel)

sy - y coordinate (screen pixel)

zoom - zoom level

Returns:

the tile

getRectangleForTile

public java.awt.geom.Rectangle2D getRectangleForTile(Tile tile)

Gets the position of the tile inside the map view.

Parameters:

tile - The tile

Returns:

The position as a rectangle in screen coordinates

getTileShapeScreen

public java.awt.Shape getTileShapeScreen(Tile tile)

Returns a shape that approximates the outline of the tile in screen coordinates. If the tile is rectangular, this will be the exact border of the tile. The tile may be more oddly shaped due to reprojection, then it is an approximation of the tile outline.

Parameters:

tile - the tile

Returns:

tile outline in screen coordinates

getScaleFactor

public double getScaleFactor(int zoom)

Returns average number of screen pixels per tile pixel for current mapview

Parameters:

zoom - zoom level

Returns:

average number of screen pixels per tile pixel

getScreenAnchorForTile

public TileAnchor getScreenAnchorForTile(Tile tile)

Get TileAnchor for a tile in screen pixel coordinates.

Parameters:

tile - the tile

Returns:

position of the tile in screen coordinates

requiresReprojection

public boolean requiresReprojection()

Return true if tiles need to be reprojected from server projection to display projection.

Returns:

true if tiles need to be reprojected from server projection to display projection