OpenLayers. Layer. Zoomify

Inherits from

OpenLayers.Layer.Grid

Summary

OpenLayers. Layer. Zoomify
Properties
url	{String} URL for root directory with TileGroupX subdirectories.
size	{OpenLayers.Size} The Zoomify image size in pixels.
isBaseLayer	{Boolean}
standardTileSize	{Integer} The size of a standard (non-border) square tile in pixels.
numberOfTiers	{Integer} Depth of the Zoomify pyramid, number of tiers (zoom levels)
tileCountUpToTier	{Array(Integer)} Number of tiles up to the given tier of pyramid.
tierSizeInTiles	{Array(OpenLayers.Size)} Size (in tiles) for each tier of pyramid.
tierImageSize	{Array(OpenLayers.Size)} Image size in pixels for each pyramid tier.
Constructor
OpenLayers. Layer. Zoomify
Functions
initializeZoomify	It generates constants for all tiers of the Zoomify pyramid
clone
getURL
getImageSize	getImageSize returns size for a particular tile.
addTile	addTile creates a tile, initializes it, and adds it to the layer div.
setMap	When the layer is added to a map, then we can fetch our origin (if we don’t have one.)
calculateGridLayout	Generate parameters for the grid layout.

Properties

url

{String} URL for root directory with TileGroupX subdirectories.

size

{OpenLayers.Size} The Zoomify image size in pixels.

isBaseLayer

{Boolean}

standardTileSize

{Integer} The size of a standard (non-border) square tile in pixels.

numberOfTiers

{Integer} Depth of the Zoomify pyramid, number of tiers (zoom levels)

filled during Zoomify pyramid initialization.

tileCountUpToTier

{Array(Integer)} Number of tiles up to the given tier of pyramid.

filled during Zoomify pyramid initialization.

tierSizeInTiles

{Array(OpenLayers.Size)} Size (in tiles) for each tier of pyramid.

filled during Zoomify pyramid initialization.

tierImageSize

{Array(OpenLayers.Size)} Image size in pixels for each pyramid tier.

filled during Zoomify pyramid initialization.

Constructor

OpenLayers. Layer. Zoomify

Parameters

name	{String} A name for the layer.
url	{String} - Relative or absolute path to the image or more precisly to the TileGroup[X] directories root. Flash plugin use the variable name “zoomifyImagePath” for this.
size	{OpenLayers.Size} The size (in pixels) of the image.
options	{Object} Hashtable of extra options to tag onto the layer

Functions

initializeZoomify

initializeZoomify: function( size )

It generates constants for all tiers of the Zoomify pyramid

Parameters

size	{OpenLayers.Size} The size of the image in pixels

clone

clone: function ( obj )

Parameters

obj

{Object}

Returns

{OpenLayers.Layer.Zoomify} An exact clone of this OpenLayers.Layer.Zoomify

getURL

getURL: function ( bounds )

Parameters

bounds

{OpenLayers.Bounds}

Returns

{String} A string with the layer’s url and parameters and also the passed-in bounds and appropriate tile size specified as parameters

getImageSize

getImageSize: function()

getImageSize returns size for a particular tile. If bounds are given as first argument, size is calculated (bottom-right tiles are non square).

addTile

addTile:function( bounds,
position )

addTile creates a tile, initializes it, and adds it to the layer div.

Parameters

bounds	{OpenLayers.Bounds}
position	{OpenLayers.Pixel}

Returns

{OpenLayers.Tile.Image} The added OpenLayers.Tile.Image

setMap

setMap: function( map )

When the layer is added to a map, then we can fetch our origin (if we don’t have one.)

Parameters

map	{OpenLayers.Map}

calculateGridLayout

calculateGridLayout: function( bounds,
extent,
resolution )

Generate parameters for the grid layout. This

Parameters

bounds	{<OpenLayers.Bound>}
extent	{OpenLayers.Bounds}
resolution	{Number}

Returns

Object containing properties tilelon, tilelat, tileoffsetlat, tileoffsetlat, tileoffsetx, tileoffsety