Fix state handling on entity view page

lib/entity.class.dart

@@ -256,7 +256,7 @@ class InputEntity extends Entity {
             Padding(
               padding: EdgeInsets.only(right: 16.0),
               child: Text(
-                  "${_state}${this.unitOfMeasurement}",
+                  "$_state${this.unitOfMeasurement}",
                   textAlign: TextAlign.right,
                   style: new TextStyle(
                     fontSize: 16.0,

lib/entity.page.dart

@@ -13,12 +13,21 @@ class _EntityViewPageState extends State<EntityViewPage> {
   String _title;
   Entity _entity;
   String _lastState;
+  StreamSubscription _stateSubscription;
 
   @override
   void initState() {
     super.initState();
     _entity = widget.entity;
     _lastState = _entity.state;
+    if (_stateSubscription != null) _stateSubscription.cancel();
+    _stateSubscription = eventBus.on<StateChangedEvent>().listen((event) {
+      setState(() {
+        if (event.entityId == _entity.entityId) {
+          _lastState = event.newState ?? _entity.state;
+        }
+      });
+    });
     _prepareData();
   }
 
@@ -47,4 +56,10 @@ class _EntityViewPageState extends State<EntityViewPage> {
       ),
     );
   }
+
+  @override
+  void dispose(){
+    if (_stateSubscription != null) _stateSubscription.cancel();
+    super.dispose();
+  }
 }

lib/main.dart

@@ -144,7 +144,7 @@ class _MainPageState extends State<MainPage> with WidgetsBindingObserver {
     if (_stateSubscription != null) _stateSubscription.cancel();
     _stateSubscription = eventBus.on<StateChangedEvent>().listen((event) {
       setState(() {
-        if (event.setToCollection) {
+        if (event.localChange) {
           _entities
               .get(event.entityId)
               .state = event.newState;

lib/utils.class.dart

@@ -45,9 +45,9 @@ class haUtils {
 class StateChangedEvent {
   String entityId;
   String newState;
-  bool setToCollection;
+  bool localChange;
 
-  StateChangedEvent(this.entityId, this.newState, this.setToCollection);
+  StateChangedEvent(this.entityId, this.newState, this.localChange);
 }
 
 class SettingsChangedEvent {