72 lines
2.5 KiB
JavaScript
72 lines
2.5 KiB
JavaScript
/* Copyright (c) 2019 Jean-Marc VIGLINO,
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released under the CeCILL-B license (French BSD license)
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(http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.txt).
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*/
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import ol_source_Vector from 'ol/source/Vector.js'
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import ol_source_BinBase from './BinBase.js'
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/** A source that use a set of feature to collect data on it.
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* If a binSource is provided the bin is recalculated when features change.
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* @constructor
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* @extends {ol_source_BinBase}
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* @param {Object} options ol_source_VectorOptions + grid option
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* @param {ol.source.Vector} options.source source to collect in the bin
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* @param {ol.source.Vector} options.binSource a source to use as bin collector, default none
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* @param {Array<ol.Feature>} options.features the features, ignored if binSource is provided, default none
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* @param {number} [options.size] size of the grid in meter, default 200m
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* @param {function} [options.geometryFunction] Function that takes an ol.Feature as argument and returns an ol.geom.Point as feature's center.
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* @param {function} [options.flatAttributes] Function takes a bin and the features it contains and aggragate the features in the bin attributes when saving
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*/
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var ol_source_FeatureBin = class olsourceFeatureBin extends ol_source_BinBase {
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constructor(options) {
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options = options || {};
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super(options);
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if (options.binSource) {
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this._sourceFeature = options.binSource;
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// When features change recalculate the bin...
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var timout;
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this._sourceFeature.on(['addfeature', 'changefeature', 'removefeature'], function () {
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if (timout) {
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// Do it only one time
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clearTimeout(timout);
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}
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timout = setTimeout(function () {
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this.reset();
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}.bind(this));
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}.bind(this));
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} else {
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this._sourceFeature = new ol_source_Vector({ features: options.features || [] });
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}
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// Handle existing features
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this.reset();
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}
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/** Set features to use as bin collector
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* @param {ol.Feature} features
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*/
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setFeatures(features) {
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this._sourceFeature.clear();
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this._sourceFeature.addFeatures(features || []);
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this.reset();
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}
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/** Get the grid geometry at the coord
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* @param {ol.Coordinate} coord
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* @returns {ol.geom.Polygon}
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* @api
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*/
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getGridGeomAt(coord, attributes) {
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var f = this._sourceFeature.getFeaturesAtCoordinate(coord)[0];
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if (!f)
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return null;
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var a = f.getProperties();
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for (var i in a) {
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if (i !== 'geometry')
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attributes[i] = a[i];
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}
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return f.getGeometry();
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}
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}
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export default ol_source_FeatureBin
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