Added square tool

src/app/services/map.service.ts

@@ -1,7 +1,7 @@
 import {BehaviorSubject} from "rxjs";
 import {latLngDistance} from "../utils";
 import {environment} from "../../environments/environment";
-import {Circle, LatLng, Marker, Measurement} from "../models/mapSymbol";
+import {Circle, LatLng, Marker, Measurement, Rectangle} from "../models/mapSymbol";
 
 declare const L;
 
@@ -151,6 +151,14 @@ export class MapService {
         return group;
     }
 
+    newRectangle(r: Rectangle) {
+        if(!r.color) r.color = '#ff4141';
+        let rect = new L.Rectangle([r.latlng, r.latlng2], r).addTo(this.map);
+        rect.symbol = r;
+        rect.on('click', e => this.click.next({event: e, symbol: rect}));
+        return rect;
+    }
+
     startDrawing() {
         this.lock();
         this.drawListener = e => {