程序包 org.meteoinfo.data.mapdata.webmap

类 TileFactory

java.lang.Object

org.meteoinfo.data.mapdata.webmap.TileFactory

直接已知子类:

AbstractTileFactory, EmptyTileFactory

public abstract class TileFactory
extends Object

A class that can produce tiles and convert coordinates to pixels

作者:

joshy

构造器概要

构造器

限定符	构造器	说明
protected	TileFactory(TileFactoryInfo info)	Creates a new instance of TileFactory

方法概要

限定符和类型	方法	说明
Point2D	geoToPixel(GeoPosition c, int zoomLevel)	Convert a GeoPosition to a pixel position in the world bitmap a the specified zoom level.
TileFactoryInfo	getInfo()	Get the TileFactoryInfo describing this TileFactory
Dimension	getMapSize(int zoom)	Returns a Dimension containing the width and height of the map, in tiles at the current zoom level.
abstract Tile	getTile(int x, int y, int zoom)	Return the Tile at a given TilePoint and zoom level
int	getTileSize(int zoom)	Gets the size of an edge of a tile in pixels at the current zoom level.
abstract void	load(Tile tile)
GeoPosition	pixelToGeo(Point2D pixelCoordinate, int zoom)	Convert a pixel in the world bitmap at the specified zoom level into a GeoPosition
protected abstract void	startLoading(Tile tile)	Override this method to load the tile using, for example, an ExecutorService.

从类继承的方法 java.lang.Object

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

构造器详细资料

TileFactory

protected TileFactory(TileFactoryInfo info)

Creates a new instance of TileFactory

参数:

info - a TileFactoryInfo to configure this TileFactory

方法详细资料

getTileSize

public int getTileSize(int zoom)

Gets the size of an edge of a tile in pixels at the current zoom level. Tiles must be square.

参数:

zoom - the current zoom level

返回:

the size of an edge of a tile in pixels

getMapSize

public Dimension getMapSize(int zoom)

Returns a Dimension containing the width and height of the map, in tiles at the current zoom level. So a Dimension that returns 10x20 would be 10 tiles wide and 20 tiles tall. These values can be multipled by getTileSize() to determine the pixel width/height for the map at the given zoom level

参数:

zoom - the current zoom level

返回:

the size of the world bitmap in tiles

getTile

public abstract Tile getTile(int x,
                             int y,
                             int zoom)

Return the Tile at a given TilePoint and zoom level

参数:

x - X index

y - Y index

zoom - the current zoom level

返回:

the tile that is located at the given tilePoint for this zoom level. For example, if getMapSize() returns 10x20 for this zoom, and the tilePoint is (3,5), then the appropriate tile will be located and returned. This method must not return null. However, it can return dummy tiles that contain no data if it wants. This is appropriate, for example, for tiles which are outside of the bounds of the map and if the factory doesn't implement wrapping.

load

public abstract void load(Tile tile)

pixelToGeo

public GeoPosition pixelToGeo(Point2D pixelCoordinate,
                              int zoom)

Convert a pixel in the world bitmap at the specified zoom level into a GeoPosition

参数:

pixelCoordinate - a Point2D representing a pixel in the world bitmap

zoom - the zoom level of the world bitmap

返回:

the converted GeoPosition

geoToPixel

public Point2D geoToPixel(GeoPosition c,
                          int zoomLevel)

Convert a GeoPosition to a pixel position in the world bitmap a the specified zoom level.

参数:

c - a GeoPosition

zoomLevel - the zoom level to extract the pixel coordinate for

返回:

the pixel point

getInfo

public TileFactoryInfo getInfo()

Get the TileFactoryInfo describing this TileFactory

返回:

a TileFactoryInfo

startLoading

protected abstract void startLoading(Tile tile)

Override this method to load the tile using, for example, an ExecutorService.

参数:

tile - The tile to load.