"use strict";
/*global define */
define(["cesium", "models/connectors/GeoPoints-Cesium"], function (
Cesium,
GeoPointsCesiumConnector
) {
/**
* @class GeoPointsCesiumPolygonConnector
* @classdesc This connector keeps a CesiumVectorData model in sync with the
* points in a GeoPoints collection. This connector will listen for changes to
* the GeoPoints collection and update the cesiumModel a polygon with vertices
* created from the points in the collection.
* @name GeoPointsCesiumPolygonConnector
* @extends GeoPointsCesiumConnector
* @constructor
* @classcategory Models/Connectors
* @since 2.27.0
*/
return GeoPointsCesiumConnector.extend(
/** @lends GeoPointsCesiumPolygonConnector.prototype */ {
/**
* The type of Backbone.Model this is.
* @type {string}
* @default "GeoPointsCesiumPolygonConnector"
*/
type: "GeoPointsCesiumPolygonConnector",
/**
* Extends the default Backbone.Model.defaults() function to specify
* default attributes for the GeoPointsCesiumPolygonConnector model.
* @extends GeoPointsCesiumConnector.defaults
* @returns {Object} The default attributes
* @property {Cesium.Entity} polygon - The polygon entity that has
* vertices created from the points in the collection.
*/
defaults: function () {
return {
// extend the defaults from the parent class
...GeoPointsCesiumConnector.prototype.defaults(),
polygon: null,
};
},
/**
* Create a Cesium.Polygon entity and add it to the layer.
* @returns {Cesium.Entity} The Cesium.Polygon entity that was added to
* the CesiumVectorData model.
*/
addPolygon: function () {
const id = this.cid;
const layer = this.get("layer") || this.setVectorLayer();
const geoPoints = this.get("geoPoints") || this.setPoints();
return layer.addEntity({
id: id, // If entity with this ID already exists, it will be updated
polygon: {
height: null, // <- clamp to ground
hierarchy: new Cesium.CallbackProperty(() => {
return new Cesium.PolygonHierarchy(geoPoints.asMapWidgetCoords());
}, false),
},
});
},
/**
* Reset the positions of the polygon vertices to the current points in
* the GeoPoints collection.
*/
handleCollectionChange: function () {
this.get("polygon") || this.addPolygon();
this.get("layer").updateAppearance();
},
}
);
});