7c2a8a0cab
of data up to our last backup. In the previous subversion repository, this was r1694->r1777. I'm sorry to all those of you who might have checked out that code, as this will surely cause problems for you. We're currently working to figure out what went wrong, and how to prevent it in the future. git-svn-id: http://svn.openlayers.org/trunk/openlayers@1695 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
123 lines
3.4 KiB
JavaScript
123 lines
3.4 KiB
JavaScript
/* Copyright (c) 2006 MetaCarta, Inc., published under the BSD license.
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* See http://svn.openlayers.org/trunk/openlayers/license.txt for the full
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* text of the license. */
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/*
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* @class
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*
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* This is a class designed to designate a single tile, however
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* it is explicitly designed to do relatively little. Tiles store information
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* about themselves -- such as the URL that they are related to, and their
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* size - but do not add themselves to the layer div automatically, for
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* example.
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*/
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OpenLayers.Tile = OpenLayers.Class.create();
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OpenLayers.Tile.prototype = {
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/** @type String */
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id: null,
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/** @type OpenLayers.Layer */
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layer: null,
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/** @type String url of the request */
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url:null,
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/** @type OpenLayers.Bounds */
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bounds:null,
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/** @type OpenLayers.Size */
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size:null,
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/** Top Left pixel of the tile
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* @type OpenLayers.Pixel */
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position:null,
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/** @type Boolean */
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drawn: false,
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/**
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* @constructor
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*
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* @param {OpenLayers.Layer} layer
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* @param {OpenLayers.Pixel} position
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* @param {OpenLayers.Bounds} bounds
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* @param {String} url
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* @param {OpenLayers.Size} size
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*/
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initialize: function(layer, position, bounds, url, size) {
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this.layer = layer;
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this.position = position;
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this.bounds = bounds;
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this.url = url;
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this.size = size;
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//give the tile a unique id based on its BBOX.
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this.id = OpenLayers.Util.createUniqueID("Tile_");
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},
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/** nullify references to prevent circular references and memory leaks
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*/
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destroy:function() {
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this.layer = null;
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this.bounds = null;
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this.size = null;
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this.position = null;
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},
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/**
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*/
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draw:function() {
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this.drawn = true;
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},
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/**
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* @param {OpenLayers.Bounds}
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* @param {OpenLayers.pixel} position
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* @param {Boolean} redraw Redraw tile after moving?
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* Default is true
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*/
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moveTo: function (bounds, position, redraw) {
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if (redraw == null) {
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redraw = true;
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}
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OpenLayers.Util.clearArray(this);
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this.bounds = bounds.clone();
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this.position = position.clone();
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if (redraw) {
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this.draw();
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}
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},
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/** Clear the tile of any bounds/position-related data so that it can
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* be reused in a new location.
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*/
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clear: function() {
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this.drawn = false;
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},
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getBoundsFromBaseLayer: function(position) {
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var topLeft = this.layer.map.getLonLatFromLayerPx(this.position);
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var bottomRightPx = this.position.clone();
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bottomRightPx.x += this.size.w;
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bottomRightPx.y += this.size.h;
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var bottomRight = this.layer.map.getLonLatFromLayerPx(bottomRightPx);
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// Handle the case where the base layer wraps around the date line.
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// Google does this, and it breaks WMS servers to request bounds in that fashion.
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if (topLeft.lon > bottomRight.lon) {
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if (topLeft.lon < 0) {
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topLeft.lon = -180 - (topLeft.lon+180);
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} else {
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bottomRight.lon = 180+bottomRight.lon+180;
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}
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}
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bounds = new OpenLayers.Bounds(topLeft.lon, bottomRight.lat, bottomRight.lon, topLeft.lat);
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return bounds;
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},
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/** @final @type String */
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CLASS_NAME: "OpenLayers.Tile"
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};
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