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DataFlowLayer.js
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148 lines (138 loc) · 4.97 KB
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import L from "leaflet";
import '../core/Base';
import {DataFlowService} from "../services/DataFlowService";
/**
* @class L.supermap.dataFlowLayer
* @classdesc 实时数据图层源
* @category iServer DataFlow
* @extends L.GeoJSON{@linkdoc-leaflet/#geojson}
* @param url - {string} 实时数据图层服务地址
* @param options - {Object} 设置图层参数。如：<br>
* geometry - {Object} GeoJSON几何对象<br>
* prjCoordSys - {Object} 投影坐标对象。<br>
* excludeField - {string} 排除字段。<br>
* idField - {string} id字段。
*/
export var DataFlowLayer = L.GeoJSON.extend({
options: {
geometry: null,
prjCoordSys: null,
excludeField: null,
idField: "id"
},
initialize: function (url, options) {
options = options || {};
var me = this;
if (options.style && !options.pointToLayer) {
options.pointToLayer = function (geojson, latlng) {
return L.circleMarker(latlng, options.style());
}
}
L.Util.setOptions(me, options);
me._layers = {};
L.stamp(me);
me.url = url;
this.idCache = {};
},
/**
* @private
* @function L.supermap.dataFlowLayer.prototype.onAdd
* @description 添加地图
* @param map - {L.map} 待添加的地图
*/
onAdd: function (map) { // eslint-disable-line no-unused-vars
var me = this;
me.dataService = new DataFlowService(this.url, {
geometry: this.options.geometry,
prjCoordSys: this.options.prjCoordSys,
excludeField: this.options.excludeField
}).initSubscribe();
me.dataService.on('subscribeSocketConnected', function (e) {
me.fire("subscribeSuccessed", e);
});
me.dataService.on('messageSuccessed', function (msg) {
me._onMessageSuccessed(msg);
});
me.dataService.on('setFilterParamSuccessed', function (msg) {
me.fire("setFilterParamSuccessed", msg);
});
},
/**
* @private
* @function L.supermap.dataFlowLayer.prototype.onRemove
* @description 删除指定地图
* @param map - {L.map} 待删除的地图
*/
onRemove: function (map) { // eslint-disable-line no-unused-vars
this.dataService.unSubscribe();
},
/**
* @function L.supermap.dataFlowLayer.prototype.setExcludeField
* @description 设置唯一字段
* @param excludeField - {string} 唯一字段
*/
setExcludeField: function (excludeField) {
this.dataService.setExcludeField(excludeField);
this.options.excludeField = excludeField;
return this;
},
/**
* @function L.supermap.dataFlowLayer.prototype.setGeometry
* @description 设置集合要素
* @param geometry - {Object} 待设置的GeoJSON几何要素对象
*/
setGeometry: function (geometry) {
this.dataService.setGeometry(geometry);
this.options.geometry = geometry;
return this;
},
_onMessageSuccessed: function (msg) {
var geojson = msg.featureResult;
var geoID = msg.featureResult.properties[this.options.idField];
var layer = null;
if (geoID !== undefined && this.idCache[geoID]) {
layer = this.getLayer(this.idCache[geoID]);
this._updateLayerData(layer, geojson);
} else {
layer = L.GeoJSON.geometryToLayer(geojson, this.options);
layer.feature = L.GeoJSON.asFeature(geojson);
this.addLayer(layer);
if (geoID !== undefined) {
this.idCache[geoID] = this.getLayerId(layer);
}
}
if (this.options.onEachFeature) {
this.options.onEachFeature(geojson, layer);
}
this.fire("dataUpdated", {layer: this, updateLayer: layer, data: msg.featureResult});
},
_updateLayerData: function (layer, geojson) {
if (geojson.properties) {
layer.feature.properties = geojson.properties;
}
var latlngs = [];
switch (geojson.geometry.type) {
case 'Point':
latlngs = L.GeoJSON.coordsToLatLng(geojson.geometry.coordinates);
layer.setLatLng(latlngs);
break;
case 'LineString':
latlngs = L.GeoJSON.coordsToLatLngs(geojson.geometry.coordinates, 0);
layer.setLatLngs(latlngs);
break;
case 'MultiLineString':
case 'Polygon':
latlngs = L.GeoJSON.coordsToLatLngs(geojson.geometry.coordinates, 1);
layer.setLatLngs(latlngs);
break;
case 'MultiPolygon':
latlngs = L.GeoJSON.coordsToLatLngs(geojson.geometry.coordinates, 2);
layer.setLatLngs(latlngs);
break;
}
}
});
export var dataFlowLayer = function (url, options) {
return new DataFlowLayer(url, options);
};
L.supermap.dataFlowLayer = dataFlowLayer;