[google_maps_flutter_web] show only single infoWindow

packages/google_maps_flutter/google_maps_flutter_web/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.1.0+6
+
+* Ensure a single `InfoWindow` is shown at a time. [Issue](https://github.com/flutter/flutter/issues/67380).
+
 ## 0.1.0+5
 
 * Update `package:google_maps` to `^3.4.5`.

packages/google_maps_flutter/google_maps_flutter_web/lib/src/markers.dart

@@ -105,6 +105,7 @@ class MarkersController extends GeometryController {
   ///
   /// See also [hideMarkerInfoWindow] and [isInfoWindowShown].
   void showMarkerInfoWindow(MarkerId markerId) {
+    _hideAllMarkerInfoWindow();
     MarkerController markerController = _markerIdToController[markerId];
     markerController?.showInfoWindow();
   }
@@ -145,4 +146,11 @@ class MarkersController extends GeometryController {
       markerId,
     ));
   }
+
+  void _hideAllMarkerInfoWindow() {
+    _markerIdToController.values
+        .where((controller) =>
+            controller == null ? false : controller.infoWindowShown)
+        .forEach((controller) => controller.hideInfoWindow());
+  }
 }

packages/google_maps_flutter/google_maps_flutter_web/pubspec.yaml

@@ -1,7 +1,7 @@
 name: google_maps_flutter_web
 description: Web platform implementation of google_maps_flutter
 homepage: https://github.com/flutter/plugins/tree/master/packages/google_maps_flutter
-version: 0.1.0+5
+version: 0.1.0+6
 
 flutter:
   plugin:

packages/google_maps_flutter/google_maps_flutter_web/test/test_driver/markers_integration.dart

@@ -100,6 +100,35 @@ void main() {
       expect(controller.markers[MarkerId('1')].infoWindowShown, isFalse);
     });
 
+    // https://github.com/flutter/flutter/issues/67380
+    testWidgets('only single InfoWindow is visible',
+        (WidgetTester tester) async {
+      final markers = {
+        Marker(
+          markerId: MarkerId('1'),
+          infoWindow: InfoWindow(title: "Title", snippet: "Snippet"),
+        ),
+        Marker(
+          markerId: MarkerId('2'),
+          infoWindow: InfoWindow(title: "Title", snippet: "Snippet"),
+        ),
+      };
+      controller.addMarkers(markers);
+
+      expect(controller.markers[MarkerId('1')].infoWindowShown, isFalse);
+      expect(controller.markers[MarkerId('2')].infoWindowShown, isFalse);
+
+      controller.showMarkerInfoWindow(MarkerId('1'));
+
+      expect(controller.markers[MarkerId('1')].infoWindowShown, isTrue);
+      expect(controller.markers[MarkerId('2')].infoWindowShown, isFalse);
+
+      controller.showMarkerInfoWindow(MarkerId('2'));
+
+      expect(controller.markers[MarkerId('1')].infoWindowShown, isFalse);
+      expect(controller.markers[MarkerId('2')].infoWindowShown, isTrue);
+    });
+
     // https://github.com/flutter/flutter/issues/64938
     testWidgets('markers with icon:null work', (WidgetTester tester) async {
       final markers = {