Add support for LatLngBounds

android/src/main/kotlin/com/example/flutterplacesdialog/FlutterPlacesDialogPlugin.kt

@@ -13,6 +13,8 @@ import com.google.android.gms.location.places.ui.PlacePicker
 import com.google.android.gms.location.places.ui.PlaceAutocomplete
 import com.google.android.gms.location.places.Place
 import com.google.android.gms.common.GoogleApiAvailability
+import com.google.android.gms.maps.model.LatLng
+import com.google.android.gms.maps.model.LatLngBounds
 
 class FlutterPlacesDialogPlugin(val activity: Activity) : MethodCallHandler, io.flutter.plugin.common.PluginRegistry.ActivityResultListener {
     var placeResult: Result? = null
@@ -41,6 +43,18 @@ class FlutterPlacesDialogPlugin(val activity: Activity) : MethodCallHandler, io.
             }
 
             var intentBuilder = PlacePicker.IntentBuilder()
+
+            val b = call.argument<Map<String, Map<String, Double>>>("bounds");
+            if (b != null) {
+                fun latLng(m: Map<String, Double>): LatLng {
+                    return LatLng(m["latitude"]!!, (m["longitude"]!!));
+                }
+
+                val se = latLng(b["southeast"]!!)
+                val nw = latLng(b["noethwest"]!!)
+                val bounds = LatLngBounds(se, nw)
+                intentBuilder = intentBuilder.setLatLngBounds(bounds);
+            }
             activity.startActivityForResult(intentBuilder.build(activity), PLACE_PICKER_REQUEST)
 
             placeResult = result

ios/Classes/SwiftFlutterPlacesDialogPlugin.swift

@@ -30,7 +30,17 @@ init(cont: FlutterViewController) {
       result(true)
     case "showPlacesPicker":
         do {
-          let config = GMSPlacePickerConfig(viewport: nil)
+          var viewport: GMSCoordinateBounds? = nil
+          let bounds = (call.arguments as! [String: Any])["bounds"] as! [String: [String: Double]]?;
+          if (bounds != nil) {
+            let northEast = CLLocationCoordinate2D(latitude: bounds!["northeast"]!["latitude"]!,
+                                                   longitude: bounds!["northeast"]!["longitude"]!)
+            let southWest = CLLocationCoordinate2D(latitude: bounds!["southwest"]!["latitude"]!,
+                                                   longitude: bounds!["southwest"]!["longitude"]!)
+            viewport = GMSCoordinateBounds(coordinate: northEast, coordinate: southWest)
+          }
+
+          let config = GMSPlacePickerConfig(viewport: viewport)
           let placePicker = GMSPlacePickerViewController(config: config)
           placePicker.delegate = self
           placeResult = result
@@ -106,4 +116,4 @@ extension SwiftFlutterPlacesDialogPlugin : GMSPlacePickerViewControllerDelegate
     viewController.dismiss(animated: true, completion: nil)
     placeResult!(nil)
   }
-}
+}

lib/flutter_places_dialog.dart

@@ -1,26 +1,48 @@
 import 'dart:async';
 
 import 'package:flutter/services.dart';
+import 'package:meta/meta.dart';
 
-enum PriceLevel {
-  Unknown,
-  Free,
-  Cheap,
-  Medium,
-  High,
-  Expensive
-}
+enum PriceLevel { Unknown, Free, Cheap, Medium, High, Expensive }
 
 class PlaceLatLong {
-  PlaceLatLong({this.latitude, this.longitude});
-  num latitude;
-  num longitude;
+  const PlaceLatLong({
+    @required this.latitude,
+    @required this.longitude,
+  });
+  final double latitude;
+  final double longitude;
+
+  PlaceLatLong.fromJson(Map<String, dynamic> data)
+      : this(
+          latitude: data['latitude'],
+          longitude: data['longitude'],
+        );
+
+  Map<String, dynamic> toJson() => {
+        'latitude': latitude,
+        'longitude': longitude,
+      };
 }
 
 class PlaceBounds {
-  PlaceBounds({this.northeast, this.southwest});
-  PlaceLatLong northeast;
-  PlaceLatLong southwest;
+  const PlaceBounds({
+    @required this.northeast,
+    @required this.southwest,
+  });
+  final PlaceLatLong northeast;
+  final PlaceLatLong southwest;
+
+  PlaceBounds.fromJson(Map<String, dynamic> data)
+      : this(
+          northeast: PlaceLatLong.fromJson(data['northeast']),
+          southwest: PlaceLatLong.fromJson(data['southwest']),
+        );
+
+  Map<String, dynamic> toJson() => {
+        'northeast': northeast.toJson(),
+        'southwest': southwest.toJson(),
+      };
 }
 
 class PlaceDetails {
@@ -58,24 +80,27 @@ class FlutterPlacesDialog {
     return ret;
   }
 
-  static Future<PlaceDetails> getPlacesDialog() async {
+  static Future<PlaceDetails> getPlacesDialog({
+    PlaceBounds bounds,
+  }) async {
     print('Opening places dialog');
-    Map<dynamic, dynamic> data = await _channel.invokeMethod("showPlacesPicker");
+    Map<dynamic, dynamic> data =
+        await _channel.invokeMethod("showPlacesPicker", {
+      "bounds": bounds?.toJson(),
+    });
     print("Places data $data");
     PlaceDetails details = new PlaceDetails();
     details.name = data["name"];
     details.address = data["address"];
     details.placeid = data["placeid"];
-    details.location = new PlaceLatLong();
-    details.location.longitude = data["longitude"];
-    details.location.latitude = data["latitude"];
+    details.location = new PlaceLatLong.fromJson(data);
     details.phoneNumber = data["phoneNumber"];
     switch (data["priceLevel"]) {
       case -1:
         details.priceLevel = PriceLevel.Unknown;
         break;
       case 0:
-        details.priceLevel= PriceLevel.Free;
+        details.priceLevel = PriceLevel.Free;
         break;
       case 1:
         details.priceLevel = PriceLevel.Cheap;
@@ -84,7 +109,7 @@ class FlutterPlacesDialog {
         details.priceLevel = PriceLevel.Medium;
         break;
       case 3:
-        details.priceLevel= PriceLevel.High;
+        details.priceLevel = PriceLevel.High;
         break;
       case 4:
         details.priceLevel = PriceLevel.Expensive;
@@ -94,15 +119,7 @@ class FlutterPlacesDialog {
         break;
     }
     details.rating = data["rating"];
-    details.bounds = new PlaceBounds();
-    details.bounds.northeast = new PlaceLatLong();
-    details.bounds.northeast.latitude = data["bounds"]["northeast"]["latitude"];
-    details.bounds.northeast.latitude =
-        data["bounds"]["northeast"]["longitude"];
-    details.bounds.southwest = new PlaceLatLong();
-    details.bounds.northeast.latitude = data["bounds"]["southwest"]["latitude"];
-    details.bounds.northeast.latitude =
-        data["bounds"]["southwest"]["longitude"];
+    details.bounds = new PlaceBounds.fromJson(data['bounds']);
     return details;
   }
 }