Project structure change in progress

lib/pages/entity.page.dart

@@ -0,0 +1,59 @@
+part of '../main.dart';
+
+class EntityViewPage extends StatefulWidget {
+  EntityViewPage({Key key, @required this.entityId, @required this.homeAssistant }) : super(key: key);
+
+  final String entityId;
+  final HomeAssistant homeAssistant;
+
+  @override
+  _EntityViewPageState createState() => new _EntityViewPageState();
+}
+
+class _EntityViewPageState extends State<EntityViewPage> {
+  String _title;
+  StreamSubscription _refreshDataSubscription;
+  StreamSubscription _stateSubscription;
+
+  @override
+  void initState() {
+    super.initState();
+    _stateSubscription = eventBus.on<StateChangedEvent>().listen((event) {
+      if (event.entityId == widget.entityId) {
+        Logger.d("State change event handled by entity page: ${event.entityId}");
+        setState(() {});
+      }
+    });
+    _refreshDataSubscription = eventBus.on<RefreshDataFinishedEvent>().listen((event) {
+      setState(() {});
+    });
+    _prepareData();
+  }
+
+  void _prepareData() async {
+    _title = widget.homeAssistant.entities.get(widget.entityId).displayName;
+  }
+
+
+  @override
+  Widget build(BuildContext context) {
+    return new Scaffold(
+      appBar: new AppBar(
+        leading: IconButton(icon: Icon(Icons.arrow_back), onPressed: (){
+          Navigator.pop(context);
+        }),
+        // Here we take the value from the MyHomePage object that was created by
+        // the App.build method, and use it to set our appbar title.
+        title: new Text(_title),
+      ),
+      body: widget.homeAssistant.entities.get(widget.entityId).buildEntityPageWidget(context),
+    );
+  }
+
+  @override
+  void dispose(){
+    if (_stateSubscription != null) _stateSubscription.cancel();
+    if (_refreshDataSubscription != null) _refreshDataSubscription.cancel();
+    super.dispose();
+  }
+}