Setup a reload trigger for Gallery

lib/events/event.dart

@@ -0,0 +1 @@
+class Event {}

lib/events/local_photos_updated_event.dart

@@ -1 +1,3 @@
-class LocalPhotosUpdatedEvent {}
+import 'package:photos/events/event.dart';
+
+class LocalPhotosUpdatedEvent extends Event {}

lib/ui/gallery.dart

@@ -5,6 +5,7 @@ import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:photos/core/event_bus.dart';
+import 'package:photos/events/event.dart';
 import 'package:photos/events/photo_opened_event.dart';
 import 'package:photos/models/photo.dart';
 import 'package:photos/ui/detail_page.dart';
@@ -19,12 +20,14 @@ class Gallery extends StatefulWidget {
   final Set<Photo> selectedPhotos;
   final Function(Set<Photo>) photoSelectionChangeCallback;
   final Future<void> Function() syncFunction;
+  final Stream<Event> reloadTrigger;
 
   Gallery(
     this.loadFunction, {
     this.selectedPhotos,
     this.photoSelectionChangeCallback,
     this.syncFunction,
+    this.reloadTrigger,
   });
 
   @override
@@ -54,6 +57,11 @@ class _GalleryState extends State<Gallery> {
         _openedPhoto = event.photo;
       });
     });
+    widget.reloadTrigger.listen((event) {
+      setState(() {
+        _requiresLoad = true;
+      });
+    });
     super.initState();
   }
 

lib/ui/home_widget.dart

@@ -35,15 +35,11 @@ class _HomeWidgetState extends State<HomeWidget> {
   ShakeDetector _detector;
   int _selectedNavBarItem = 0;
   Set<Photo> _selectedPhotos = HashSet<Photo>();
-  StreamSubscription<LocalPhotosUpdatedEvent> _subscription;
   final _deviceFolderGalleryWidget = DeviceFolderGalleryWidget();
   final _remoteFolderGalleryWidget = RemoteFolderGalleryWidget();
 
   @override
   void initState() {
-    _subscription = Bus.instance.on<LocalPhotosUpdatedEvent>().listen((event) {
-      setState(() {});
-    });
     _detector = ShakeDetector.autoStart(
         shakeThresholdGravity: 3,
         onPhoneShake: () {
@@ -116,6 +112,7 @@ class _HomeWidgetState extends State<HomeWidget> {
       syncFunction: () {
         return PhotoSyncManager.instance.sync();
       },
+      reloadTrigger: Bus.instance.on<LocalPhotosUpdatedEvent>(),
     );
   }
 
@@ -164,7 +161,6 @@ class _HomeWidgetState extends State<HomeWidget> {
   @override
   void dispose() {
     _detector.stopListening();
-    _subscription.cancel();
     super.dispose();
   }
 }