67ced536c0
git-svn-id: http://svn.openlayers.org/trunk/openlayers@1588 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
137 lines
3.7 KiB
JavaScript
137 lines
3.7 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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* @requires OpenLayers/Tile.js
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*/
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OpenLayers.Tile.WFS = OpenLayers.Class.create();
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OpenLayers.Tile.WFS.prototype =
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OpenLayers.Util.extend( new OpenLayers.Tile(), {
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/** @type Array(OpenLayers.Feature)*/
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features: null,
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/** @type Array(String) */
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urls: null,
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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 {Array} urls
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* @param {OpenLayers.Size} size
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*/
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initialize: function(layer, position, bounds, urls, size) {
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var newArguments = arguments;
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if (arguments.length > 0) {
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newArguments = [layer, position, bounds, null, size];
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}
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OpenLayers.Tile.prototype.initialize.apply(this, newArguments);
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this.urls = urls;
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this.features = new Array();
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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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OpenLayers.Tile.prototype.destroy.apply(this, arguments);
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this.destroyAllFeatures();
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this.features = null;
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this.urls = null;
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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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OpenLayers.Tile.prototype.clear.apply(this, arguments);
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this.destroyAllFeatures();
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},
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/**
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*
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*/
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draw:function() {
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if (this.drawn) {
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this.clear();
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}
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OpenLayers.Tile.prototype.draw.apply(this, arguments);
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if (this.layer.displayOutsideMaxExtent || (this.layer.maxExtent &&
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this.layer.maxExtent.intersectsBounds(this.bounds, false))) {
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this.loadFeaturesForRegion(this.requestSuccess);
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}
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},
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/** get the full request string from the ds and the tile params
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* and call the AJAX loadURL().
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*
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* input are function pointers for what to do on success and failure.
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*
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* @param {function} success
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* @param {function} failure
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*/
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loadFeaturesForRegion:function(success, failure) {
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if (this.urls != null) {
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for(var i=0; i < this.urls.length; i++) {
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var params = { BBOX:this.bounds.toBBOX() };
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var url = this.urls[i] + "&" +
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OpenLayers.Util.getParameterString(params);
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OpenLayers.loadURL(url, null, this, success, failure);
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}
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}
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},
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/** Return from AJAX request
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*
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* @param {} request
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*/
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requestSuccess:function(request) {
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var doc = request.responseXML;
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if (!doc || request.fileType!="XML") {
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doc = OpenLayers.parseXMLString(request.responseText);
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}
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var resultFeatures = doc.getElementsByTagName("featureMember");
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this.addResults(resultFeatures);
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},
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/**
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* @param {Object} results
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*/
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addResults: function(results) {
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for (var i=0; i < results.length; i++) {
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var feature = new this.layer.featureClass(this.layer,
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results[i]);
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this.features.push(feature);
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}
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},
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/** Iterate through and call destroy() on each feature, removing it from
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* the local array
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*
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* @private
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*/
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destroyAllFeatures: function() {
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while(this.features.length > 0) {
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var feature = this.features.shift();
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feature.destroy();
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}
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},
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/** @final @type String */
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CLASS_NAME: "OpenLayers.Tile.WFS"
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}
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);
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