feat(demo): add new demo for current user's location

Author: paodb

src/test/java/com/flowingcode/vaadin/addons/googlemaps/GeolocationDemo.java

@@ -0,0 +1,63 @@
+/*-
+ * #%L
+ * Google Maps Addon
+ * %%
+ * Copyright (C) 2020 - 2021 Flowing Code
+ * %%
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * #L%
+ */
+package com.flowingcode.vaadin.addons.googlemaps;
+
+import com.flowingcode.vaadin.addons.googlemaps.GoogleMap.MapType;
+import com.vaadin.flow.component.button.Button;
+import com.vaadin.flow.component.html.H2;
+import com.vaadin.flow.component.notification.Notification;
+import com.vaadin.flow.component.orderedlayout.FlexLayout;
+import com.vaadin.flow.component.orderedlayout.FlexLayout.FlexWrap;
+import com.vaadin.flow.component.orderedlayout.VerticalLayout;
+
+@SuppressWarnings("serial")
+public class GeolocationDemo extends VerticalLayout {
+
+  public GeolocationDemo() {
+    this.setSizeFull();
+    String apiKey = System.getProperty("google.maps.api");
+    if (apiKey == null) {
+      add(
+          new H2(
+              "Api key is needded to run the demo, pass it using the following system property: '-Dgoogle.maps.api=<your-api-key>'"));
+    } else {
+      GoogleMap gmaps = new GoogleMap(apiKey, null, null);
+      gmaps.setMapType(MapType.ROADMAP);
+      gmaps.setSizeFull();
+
+      FlexLayout layout = new FlexLayout();
+      layout.setFlexWrap(FlexWrap.WRAP);
+      layout.add(new Button("Go to current location", e -> gmaps.goToCurrentLocation()));
+      add(gmaps, layout);
+
+      gmaps.addCurrentLocationEventListener(
+          e ->
+              gmaps.addMarker(
+                  new GoogleMapMarker("You are here!", gmaps.getCenter(), false, Markers.GREEN)));
+
+      gmaps.addGeolocationErrorEventListener(
+          e ->
+              Notification.show(
+                  e.isBrowserHasGeolocationSupport()
+                      ? "The geolocation service failed on retrieving your location."
+                      : "Your browser doesn't support geolocation."));
+    }
+  }
+}

src/test/java/com/flowingcode/vaadin/addons/googlemaps/GooglemapsDemoView.java

@@ -32,9 +32,13 @@ public class GooglemapsDemoView extends TabbedDemo {
   private static final String GMAPS_DEMO = "Google Maps Demo";
   private static final String GMAPS_SOURCE =
       "https://github.com/FlowingCode/GoogleMapsAddon/blob/master/src/test/java/com/flowingcode/vaadin/addons/googlemaps/GoogleMapsDemo.java";
+  private static final String GEOLOCATION_DEMO = "Geolocation Demo";
+  private static final String GEOLOCATION_SOURCE =
+      "https://github.com/FlowingCode/GoogleMapsAddon/blob/master/src/test/java/com/flowingcode/vaadin/addons/googlemaps/GeolocationDemo.java";
 
   public GooglemapsDemoView() {
     addDemo(new GoogleMapsDemo(), GMAPS_DEMO, GMAPS_SOURCE);
+    addDemo(new GeolocationDemo(), GEOLOCATION_DEMO, GEOLOCATION_SOURCE);
     setSizeFull();
   }
 }