ed3221441c
completes an important blocker for moving forward with OSGeo incubation. git-svn-id: http://svn.openlayers.org/trunk/openlayers@4985 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
140 lines
3.8 KiB
JavaScript
140 lines
3.8 KiB
JavaScript
/* Copyright (c) 2006-2007 MetaCarta, Inc., published under the Clear BSD
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* licence. See http://svn.openlayers.org/trunk/openlayers/license.txt for the
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* full text of the license. */
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/**
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* @requires OpenLayers/Layer/Grid.js
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*
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* Class: OpenLayers.Layer.TMS
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*
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* Inherits from:
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* - <OpenLayers.Layer.Grid>
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*/
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OpenLayers.Layer.TMS = OpenLayers.Class(OpenLayers.Layer.Grid, {
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/**
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* APIProperty: serviceVersion
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* {String}
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*/
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serviceVersion: "1.0.0",
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/**
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* APIProperty: isBaseLayer
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* {Boolean}
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*/
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isBaseLayer: true,
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/**
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* APIProperty: tileOrigin
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* {<OpenLayers.Pixel>}
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*/
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tileOrigin: null,
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/**
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* Constructor: OpenLayers.Layer.TMS
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*
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* Parameters:
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* name - {String}
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* url - {String}
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* options - {Object} 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 = [];
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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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* APIMethod:destroy
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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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* APIMethod: clone
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*
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* Parameters:
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* obj - {Object}
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*
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* Returns:
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* {<OpenLayers.Layer.TMS>} An exact clone of this <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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* Method: getUrl
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*
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* Parameters:
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* bounds - {<OpenLayers.Bounds>}
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*
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* Returns:
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* {String} 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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*/
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getURL: function (bounds) {
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bounds = this.adjustBounds(bounds);
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var res = this.map.getResolution();
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var x = Math.round((bounds.left - this.tileOrigin.lon) / (res * this.tileSize.w));
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var y = Math.round((bounds.bottom - this.tileOrigin.lat) / (res * this.tileSize.h));
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var z = this.map.getZoom();
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var path = this.serviceVersion + "/" + 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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* Method: addTile
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* addTile creates a tile, initializes it, and adds it to the layer div.
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*
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* Parameters:
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* bounds - {<OpenLayers.Bounds>}
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*
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* Returns:
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* {<OpenLayers.Tile.Image>} The added OpenLayers.Tile.Image
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*/
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addTile:function(bounds,position) {
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return new OpenLayers.Tile.Image(this, position, bounds,
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null, this.tileSize);
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},
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/**
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* APIMethod: setMap
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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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* Parameters:
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* map - {<OpenLayers.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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CLASS_NAME: "OpenLayers.Layer.TMS"
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});
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