9011c8ca0a
git-svn-id: http://svn.openlayers.org/tags/openlayers/release-2.4-rc2@3089 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
118 lines
3.4 KiB
JavaScript
118 lines
3.4 KiB
JavaScript
/* Copyright (c) 2006 MetaCarta, Inc., published under a BSD licence.
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* See http://svn.openlayers.org/trunk/openlayers/release-license.txt
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* for the full text of the license. */
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/**
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* @class
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*
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* @requires OpenLayers/Layer/Grid.js
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*/
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OpenLayers.Layer.TMS = OpenLayers.Class.create();
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OpenLayers.Layer.TMS.prototype =
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OpenLayers.Class.inherit( OpenLayers.Layer.Grid, {
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reproject: false,
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isBaseLayer: true,
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tileOrigin: null,
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/**
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* @constructor
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*
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* @param {String} name
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* @param {String} url
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* @param {Object} params
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* @param {Object} options Hashtable of extra options to tag onto the layer
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*/
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initialize: function(name, url, options) {
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var newArguments = new Array();
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newArguments.push(name, url, {}, options);
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OpenLayers.Layer.Grid.prototype.initialize.apply(this, newArguments);
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},
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/**
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*
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*/
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destroy: function() {
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// for now, nothing special to do here.
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OpenLayers.Layer.Grid.prototype.destroy.apply(this, arguments);
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},
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/**
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* @param {Object} obj
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*
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* @returns An exact clone of this OpenLayers.Layer.TMS
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* @type OpenLayers.Layer.TMS
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*/
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clone: function (obj) {
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if (obj == null) {
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obj = new OpenLayers.Layer.TMS(this.name,
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this.url,
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this.options);
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}
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//get all additions from superclasses
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obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);
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// copy/set any non-init, non-simple values here
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return obj;
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},
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/**
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* @param {OpenLayers.Bounds} bounds
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*
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* @returns A string with the layer's url and parameters and also the
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* passed-in bounds and appropriate tile size specified as
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* parameters
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* @type String
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*/
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getURL: function (bounds) {
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var res = this.map.getResolution();
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var x = (bounds.left - this.tileOrigin.lon) / (res * this.tileSize.w);
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var y = (bounds.bottom - this.tileOrigin.lat) / (res * this.tileSize.h);
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var z = this.map.getZoom();
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var path = "1.0.0" + "/" + this.layername + "/" + z + "/" + x + "/" + y + "." + this.type;
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var url = this.url;
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if (url instanceof Array) {
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url = this.selectUrl(path, url);
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}
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return url + path;
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},
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/**
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* addTile creates a tile, initializes it, and
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* adds it to the layer div.
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*
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* @param {OpenLayers.Bounds} bounds
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*
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* @returns The added OpenLayers.Tile.Image
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* @type OpenLayers.Tile.Image
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*/
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addTile:function(bounds,position) {
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var url = this.getURL(bounds);
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return new OpenLayers.Tile.Image(this, position, bounds,
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url, this.tileSize);
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},
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/** When the layer is added to a map, then we can fetch our origin
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* (if we don't have one.)
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*
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* @param {OpenLayers.Map} map
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*/
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setMap: function(map) {
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OpenLayers.Layer.Grid.prototype.setMap.apply(this, arguments);
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if (!this.tileOrigin) {
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this.tileOrigin = new OpenLayers.LonLat(this.map.maxExtent.left,
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this.map.maxExtent.bottom);
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}
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},
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/** @final @type String */
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CLASS_NAME: "OpenLayers.Layer.TMS"
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});
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