[google_maps_flutter] Adds support for displaying the traffic layer (#1767)

* [google_maps_flutter] Adds support for displaying the traffic layer

* [google_maps_flutter] Adds traffic layer tests

Author: josh-burton

packages/google_maps_flutter/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.5.20+6
+
+* Adds support for toggling the traffic layer
+
 ## 0.5.20+5
 
 * Allow (de-)serialization of CameraPosition

packages/google_maps_flutter/android/src/main/java/io/flutter/plugins/googlemaps/Convert.java

@@ -316,6 +316,10 @@ static void interpretGoogleMapOptions(Object o, GoogleMapOptionsSink sink) {
     if (indoorEnabled != null) {
       sink.setIndoorEnabled(toBoolean(indoorEnabled));
     }
+    final Object trafficEnabled = data.get("trafficEnabled");
+    if (trafficEnabled != null) {
+      sink.setTrafficEnabled(toBoolean(trafficEnabled));
+    }
   }
 
   /** Returns the dartMarkerId of the interpreted marker. */

packages/google_maps_flutter/android/src/main/java/io/flutter/plugins/googlemaps/GoogleMapBuilder.java

@@ -18,6 +18,7 @@ class GoogleMapBuilder implements GoogleMapOptionsSink {
   private boolean myLocationEnabled = false;
   private boolean myLocationButtonEnabled = false;
   private boolean indoorEnabled = true;
+  private boolean trafficEnabled = false;
   private Object initialMarkers;
   private Object initialPolygons;
   private Object initialPolylines;
@@ -32,6 +33,7 @@ GoogleMapController build(
     controller.setMyLocationEnabled(myLocationEnabled);
     controller.setMyLocationButtonEnabled(myLocationButtonEnabled);
     controller.setIndoorEnabled(indoorEnabled);
+    controller.setTrafficEnabled(trafficEnabled);
     controller.setTrackCameraPosition(trackCameraPosition);
     controller.setInitialMarkers(initialMarkers);
     controller.setInitialPolygons(initialPolygons);
@@ -110,6 +112,11 @@ public void setIndoorEnabled(boolean indoorEnabled) {
     this.indoorEnabled = indoorEnabled;
   }
 
+  @Override
+  public void setTrafficEnabled(boolean trafficEnabled) {
+    this.trafficEnabled = trafficEnabled;
+  }
+
   @Override
   public void setMyLocationEnabled(boolean myLocationEnabled) {
     this.myLocationEnabled = myLocationEnabled;

packages/google_maps_flutter/android/src/main/java/io/flutter/plugins/googlemaps/GoogleMapController.java

@@ -74,6 +74,7 @@ final class GoogleMapController
   private boolean myLocationEnabled = false;
   private boolean myLocationButtonEnabled = false;
   private boolean indoorEnabled = true;
+  private boolean trafficEnabled = false;
   private boolean disposed = false;
   private final float density;
   private MethodChannel.Result mapReadyResult;
@@ -169,6 +170,7 @@ private CameraPosition getCameraPosition() {
   public void onMapReady(GoogleMap googleMap) {
     this.googleMap = googleMap;
     this.googleMap.setIndoorEnabled(this.indoorEnabled);
+    this.googleMap.setTrafficEnabled(this.trafficEnabled);
     googleMap.setOnInfoWindowClickListener(this);
     if (mapReadyResult != null) {
       mapReadyResult.success(null);
@@ -327,6 +329,11 @@ public void onMethodCall(MethodCall call, MethodChannel.Result result) {
           result.success(googleMap.getUiSettings().isMyLocationButtonEnabled());
           break;
         }
+      case "map#isTrafficEnabled":
+        {
+          result.success(googleMap.isTrafficEnabled());
+          break;
+        }
       case "map#setStyle":
         {
           String mapStyle = (String) call.arguments;
@@ -664,4 +671,8 @@ private int checkSelfPermission(String permission) {
   public void setIndoorEnabled(boolean indoorEnabled) {
     this.indoorEnabled = indoorEnabled;
   }
+
+  public void setTrafficEnabled(boolean trafficEnabled) {
+    this.trafficEnabled = trafficEnabled;
+  }
 }

packages/google_maps_flutter/android/src/main/java/io/flutter/plugins/googlemaps/GoogleMapOptionsSink.java

@@ -36,6 +36,8 @@ interface GoogleMapOptionsSink {
 
   void setIndoorEnabled(boolean indoorEnabled);
 
+  void setTrafficEnabled(boolean trafficEnabled);
+
   void setInitialMarkers(Object initialMarkers);
 
   void setInitialPolygons(Object initialPolygons);

packages/google_maps_flutter/example/test_driver/google_map_inspector.dart

@@ -49,4 +49,8 @@ class GoogleMapInspector {
   Future<bool> isMyLocationButtonEnabled() async {
     return await _channel.invokeMethod<bool>('map#isMyLocationButtonEnabled');
   }
+
+  Future<bool> isTrafficEnabled() async {
+    return await _channel.invokeMethod<bool>('map#isTrafficEnabled');
+  }
 }

packages/google_maps_flutter/example/test_driver/google_maps.dart

@@ -375,6 +375,31 @@ void main() {
     expect(secondVisibleRegion.contains(newCenter), isTrue);
   });
 
+  test('testTraffic', () async {
+    final Key key = GlobalKey();
+    final Completer<GoogleMapInspector> inspectorCompleter =
+        Completer<GoogleMapInspector>();
+
+    await pumpWidget(Directionality(
+      textDirection: TextDirection.ltr,
+      child: GoogleMap(
+        key: key,
+        initialCameraPosition: _kInitialCameraPosition,
+        trafficEnabled: true,
+        onMapCreated: (GoogleMapController controller) {
+          final GoogleMapInspector inspector =
+              // ignore: invalid_use_of_visible_for_testing_member
+              GoogleMapInspector(controller.channel);
+          inspectorCompleter.complete(inspector);
+        },
+      ),
+    ));
+
+    final GoogleMapInspector inspector = await inspectorCompleter.future;
+    final bool isTrafficEnabled = await inspector.isTrafficEnabled();
+    expect(isTrafficEnabled, true);
+  });
+
   test('testMyLocationButtonToggle', () async {
     final Key key = GlobalKey();
     final Completer<GoogleMapInspector> inspectorCompleter =

packages/google_maps_flutter/ios/Classes/GoogleMapController.h

@@ -14,6 +14,7 @@
 - (void)setCameraTargetBounds:(GMSCoordinateBounds *)bounds;
 - (void)setCompassEnabled:(BOOL)enabled;
 - (void)setIndoorEnabled:(BOOL)enabled;
+- (void)setTrafficEnabled:(BOOL)enabled;
 - (void)setMapType:(GMSMapViewType)type;
 - (void)setMinZoom:(float)minZoom maxZoom:(float)maxZoom;
 - (void)setPaddingTop:(float)top left:(float)left bottom:(float)bottom right:(float)right;

packages/google_maps_flutter/ios/Classes/GoogleMapController.m

@@ -229,6 +229,9 @@ - (void)onMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
   } else if ([call.method isEqualToString:@"map#isMyLocationButtonEnabled"]) {
     NSNumber* isMyLocationButtonEnabled = @(_mapView.settings.myLocationButton);
     result(isMyLocationButtonEnabled);
+  } else if ([call.method isEqualToString:@"map#isTrafficEnabled"]) {
+    NSNumber* isTrafficEnabled = @(_mapView.trafficEnabled);
+    result(isTrafficEnabled);
   } else if ([call.method isEqualToString:@"map#setStyle"]) {
     NSString* mapStyle = [call arguments];
     NSString* error = [self setMapStyle:mapStyle];
@@ -286,6 +289,10 @@ - (void)setIndoorEnabled:(BOOL)enabled {
   _mapView.indoorEnabled = enabled;
 }
 
+- (void)setTrafficEnabled:(BOOL)enabled {
+  _mapView.trafficEnabled = enabled;
+}
+
 - (void)setMapType:(GMSMapViewType)mapType {
   _mapView.mapType = mapType;
 }
@@ -509,6 +516,10 @@ static void InterpretMapOptions(NSDictionary* data, id<FLTGoogleMapOptionsSink>
   if (indoorEnabled) {
     [sink setIndoorEnabled:ToBool(indoorEnabled)];
   }
+  id trafficEnabled = data[@"trafficEnabled"];
+  if (trafficEnabled) {
+    [sink setTrafficEnabled:ToBool(trafficEnabled)];
+  }
   id mapType = data[@"mapType"];
   if (mapType) {
     [sink setMapType:ToMapViewType(mapType)];

packages/google_maps_flutter/lib/src/google_map.dart

@@ -35,6 +35,7 @@ class GoogleMap extends StatefulWidget {
     /// If no padding is specified default padding will be 0.
     this.padding = const EdgeInsets.all(0),
     this.indoorViewEnabled = false,
+    this.trafficEnabled = false,
     this.markers,
     this.polygons,
     this.polylines,
@@ -164,6 +165,9 @@ class GoogleMap extends StatefulWidget {
   /// Enables or disables the indoor view from the map
   final bool indoorViewEnabled;
 
+  /// Enables or disables the traffic layer of the map
+  final bool trafficEnabled;
+
   /// Which gestures should be consumed by the map.
   ///
   /// It is possible for other gesture recognizers to be competing with the map on pointer
@@ -372,6 +376,7 @@ class _GoogleMapOptions {
     this.myLocationButtonEnabled,
     this.padding,
     this.indoorViewEnabled,
+    this.trafficEnabled,
   });
 
   static _GoogleMapOptions fromWidget(GoogleMap map) {
@@ -390,6 +395,7 @@ class _GoogleMapOptions {
       myLocationButtonEnabled: map.myLocationButtonEnabled,
       padding: map.padding,
       indoorViewEnabled: map.indoorViewEnabled,
+      trafficEnabled: map.trafficEnabled,
     );
   }
 
@@ -421,6 +427,8 @@ class _GoogleMapOptions {
 
   final bool indoorViewEnabled;
 
+  final bool trafficEnabled;
+
   Map<String, dynamic> toMap() {
     final Map<String, dynamic> optionsMap = <String, dynamic>{};
 
@@ -449,6 +457,7 @@ class _GoogleMapOptions {
       padding?.right,
     ]);
     addIfNonNull('indoorEnabled', indoorViewEnabled);
+    addIfNonNull('trafficEnabled', trafficEnabled);
     return optionsMap;
   }