cc3a4c113b
git-svn-id: http://svn.openlayers.org/trunk/openlayers@2029 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
135 lines
3.7 KiB
JavaScript
135 lines
3.7 KiB
JavaScript
/* Copyright (c) 2006 MetaCarta, Inc., published under a modified BSD license.
|
|
* See http://svn.openlayers.org/trunk/openlayers/repository-license.txt
|
|
* for the full text of the license. */
|
|
|
|
|
|
/**
|
|
* @class
|
|
*
|
|
* @requires OpenLayers/Tile.js
|
|
*/
|
|
OpenLayers.Tile.WFS = OpenLayers.Class.create();
|
|
OpenLayers.Tile.WFS.prototype =
|
|
OpenLayers.Class.inherit( OpenLayers.Tile, {
|
|
|
|
/** @type Array(OpenLayers.Feature)*/
|
|
features: null,
|
|
|
|
/** @type Array(String) */
|
|
urls: null,
|
|
|
|
/**
|
|
* @constructor
|
|
*
|
|
* @param {OpenLayers.Layer} layer
|
|
* @param {OpenLayers.Pixel} position
|
|
* @param {OpenLayers.Bounds} bounds
|
|
* @param {Array} urls
|
|
* @param {OpenLayers.Size} size
|
|
*/
|
|
initialize: function(layer, position, bounds, urls, size) {
|
|
var newArguments = arguments;
|
|
newArguments = [layer, position, bounds, null, size];
|
|
OpenLayers.Tile.prototype.initialize.apply(this, newArguments);
|
|
this.urls = urls;
|
|
this.features = new Array();
|
|
},
|
|
|
|
/**
|
|
*
|
|
*/
|
|
destroy: function() {
|
|
OpenLayers.Tile.prototype.destroy.apply(this, arguments);
|
|
this.destroyAllFeatures();
|
|
this.features = null;
|
|
this.urls = null;
|
|
},
|
|
|
|
/** Clear the tile of any bounds/position-related data so that it can
|
|
* be reused in a new location.
|
|
*/
|
|
clear: function() {
|
|
OpenLayers.Tile.prototype.clear.apply(this, arguments);
|
|
this.destroyAllFeatures();
|
|
},
|
|
|
|
/**
|
|
*
|
|
*/
|
|
draw:function() {
|
|
if (this.drawn) {
|
|
this.clear();
|
|
}
|
|
OpenLayers.Tile.prototype.draw.apply(this, arguments);
|
|
if (this.layer.displayOutsideMaxExtent || (this.layer.maxExtent &&
|
|
this.layer.maxExtent.intersectsBounds(this.bounds, false))) {
|
|
this.loadFeaturesForRegion(this.requestSuccess);
|
|
}
|
|
},
|
|
|
|
/** get the full request string from the ds and the tile params
|
|
* and call the AJAX loadURL().
|
|
*
|
|
* input are function pointers for what to do on success and failure.
|
|
*
|
|
* @param {function} success
|
|
* @param {function} failure
|
|
*/
|
|
loadFeaturesForRegion:function(success, failure) {
|
|
|
|
if (this.urls != null) {
|
|
|
|
for(var i=0; i < this.urls.length; i++) {
|
|
var params = { BBOX:this.bounds.toBBOX() };
|
|
var url = this.urls[i] + "&" +
|
|
OpenLayers.Util.getParameterString(params);
|
|
OpenLayers.loadURL(url, null, this, success, failure);
|
|
}
|
|
}
|
|
},
|
|
|
|
/** Return from AJAX request
|
|
*
|
|
* @param {XMLHttpRequest} request
|
|
*/
|
|
requestSuccess:function(request) {
|
|
var doc = request.responseXML;
|
|
|
|
if (!doc || request.fileType!="XML") {
|
|
doc = OpenLayers.parseXMLString(request.responseText);
|
|
}
|
|
|
|
var resultFeatures = OpenLayers.Ajax.getElementsByTagNameNS(doc, "http://www.opengis.net/gml","gml", "featureMember");
|
|
this.addResults(resultFeatures);
|
|
},
|
|
|
|
/**
|
|
* @param {Object} results
|
|
*/
|
|
addResults: function(results) {
|
|
for (var i=0; i < results.length; i++) {
|
|
var feature = new this.layer.featureClass(this.layer,
|
|
results[i]);
|
|
this.features.push(feature);
|
|
}
|
|
},
|
|
|
|
/** Iterate through and call destroy() on each feature, removing it from
|
|
* the local array
|
|
*
|
|
* @private
|
|
*/
|
|
destroyAllFeatures: function() {
|
|
while(this.features.length > 0) {
|
|
var feature = this.features.shift();
|
|
feature.destroy();
|
|
}
|
|
},
|
|
|
|
/** @final @type String */
|
|
CLASS_NAME: "OpenLayers.Tile.WFS"
|
|
}
|
|
);
|
|
|
|
|