Map attribution & map layers plugin

lib/layerSelectorMapPlugin.dart

@@ -0,0 +1,57 @@
+import 'package:comunes_flutter/comunes_flutter.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/src/widgets/framework.dart';
+import 'package:flutter_map/plugin_api.dart';
+import 'package:flutter_simple_dependency_injection/injector.dart';
+import 'package:redux/redux.dart';
+
+import 'models/appState.dart';
+import 'redux/actions.dart';
+
+class LayerSelectorMapPluginOptions extends LayerOptions {
+  final String text;
+
+  LayerSelectorMapPluginOptions({this.text = ""});
+}
+
+// https://github.com/apptreesoftware/flutter_map/blob/master/flutter_map_example/lib/pages/plugin_api.dart
+class LayerSelectorMapPlugin extends MapPlugin {
+  Widget LayerSelectorButton(Store<AppState> store) {
+    return new FloatingActionButton(
+      backgroundColor: Colors.black26,
+      mini: true,
+        child: Icon(Icons.layers, /* size: 40.0, color: Colors.black45, */ ),
+        onPressed: () {
+          store.dispatch(new ToggleMapLayerAction());
+        });
+  }
+
+  @override
+  Widget createLayer(LayerOptions options, MapState mapState) {
+    Store<AppState> store = Injector.getInjector().get<Store<AppState>>();
+    if (options is LayerSelectorMapPluginOptions) {
+      return LayoutBuilder(
+          builder: (context, constraints) =>
+              Stack(fit: StackFit.expand, children: <Widget>[
+                Positioned(
+                  top: constraints.maxHeight - 60,
+                  left: 10.0,
+                  child: new CenteredRow(
+                    children: <Widget>[
+                      new Column(
+                        children: <Widget>[LayerSelectorButton(store)],
+                      )
+                    ],
+                  ),
+                )
+              ]));
+    }
+    throw ("Unknown options type for LayerSelectorMapPlugin"
+        "plugin: $options");
+  }
+
+  @override
+  bool supportsLayer(LayerOptions options) {
+    return options is LayerSelectorMapPluginOptions;
+  }
+}