lib/food_entry/food_entry_bloc.dart

@@ -27,7 +27,8 @@ class FoodEntryBloc extends Bloc<FoodEvent, GlobalEntryState> {
     var newList = await storage.getEntriesForDate(event.forDate);
     state.foodEntries.addAll({event.forDate: newList});
 
-    emit(GlobalEntryState(foodEntries: state.foodEntries));
+    emit(GlobalEntryState(
+        foodEntries: state.foodEntries, stateChangedForDate: event.forDate));
   }
 
   void handleFoodEntryEvent(
@@ -43,7 +44,8 @@ class FoodEntryBloc extends Bloc<FoodEvent, GlobalEntryState> {
     var newFoodEntries = state.foodEntries;
     newFoodEntries.addAll({event.forDate: entriesForDate});
 
-    emit(GlobalEntryState(foodEntries: newFoodEntries));
+    emit(GlobalEntryState(
+        foodEntries: newFoodEntries, stateChangedForDate: event.forDate));
   }
 
   void handleFoodChangedEvent(
@@ -64,7 +66,8 @@ class FoodEntryBloc extends Bloc<FoodEvent, GlobalEntryState> {
     var newFoodEntries = state.foodEntries;
     newFoodEntries.addAll({event.forDate: entriesForDate});
 
-    emit(GlobalEntryState(foodEntries: newFoodEntries));
+    emit(GlobalEntryState(
+        foodEntries: newFoodEntries, stateChangedForDate: event.forDate));
   }
 
   void handleDeleteFoodEvent(
@@ -79,7 +82,8 @@ class FoodEntryBloc extends Bloc<FoodEvent, GlobalEntryState> {
     var newFoodEntries = state.foodEntries;
     newFoodEntries.addAll({event.forDate: entriesForDate});
 
-    emit(GlobalEntryState(foodEntries: newFoodEntries));
+    emit(GlobalEntryState(
+        foodEntries: newFoodEntries, stateChangedForDate: event.forDate));
   }
 
   void handleBarcodeScannedEvent(
@@ -91,6 +95,7 @@ class FoodEntryBloc extends Bloc<FoodEvent, GlobalEntryState> {
       if (e.code == BarcodeScanner.cameraAccessDenied) {
         emit(GlobalEntryState(
             foodEntries: state.foodEntries,
+            stateChangedForDate: event.forDate,
             appError:
                 GlobalAppError(GlobalAppErrorType.errCameraPermissionDenied)));
       }
@@ -107,6 +112,7 @@ class FoodEntryBloc extends Bloc<FoodEvent, GlobalEntryState> {
     if (scanResult.type == ResultType.Error) {
       emit(GlobalEntryState(
           foodEntries: state.foodEntries,
+          stateChangedForDate: event.forDate,
           appError: GlobalAppError(GlobalAppErrorType.errGeneralError)));
       return;
     }
@@ -122,7 +128,10 @@ class FoodEntryBloc extends Bloc<FoodEvent, GlobalEntryState> {
 
     entriesForDate.add(newEntryWaiting);
     state.foodEntries.addAll({event.forDate: entriesForDate});
-    emit(GlobalEntryState(foodEntries: state.foodEntries));
+    emit(GlobalEntryState(
+      foodEntries: state.foodEntries,
+      stateChangedForDate: event.forDate,
+    ));
 
     await responseFuture.then((response) async {
       var index = entriesForDate
@@ -140,6 +149,7 @@ class FoodEntryBloc extends Bloc<FoodEvent, GlobalEntryState> {
 
         emit(GlobalEntryState(
             foodEntries: newFoodEntries,
+            stateChangedForDate: event.forDate,
             appError: GlobalAppError(GlobalAppErrorType.errbarcodeNotFound)));
         return;
       }
@@ -151,6 +161,7 @@ class FoodEntryBloc extends Bloc<FoodEvent, GlobalEntryState> {
 
         emit(GlobalEntryState(
             foodEntries: newFoodEntries,
+            stateChangedForDate: event.forDate,
             appError:
                 GlobalAppError(GlobalAppErrorType.errServerNotReachable)));
         return;
@@ -173,7 +184,8 @@ class FoodEntryBloc extends Bloc<FoodEvent, GlobalEntryState> {
       var newFoodEntries = state.foodEntries;
       newFoodEntries.addAll({event.forDate: entriesForDate});
 
-      emit(GlobalEntryState(foodEntries: newFoodEntries));
+      emit(GlobalEntryState(
+          foodEntries: newFoodEntries, stateChangedForDate: event.forDate));
     });
   }
 
@@ -194,7 +206,8 @@ class FoodEntryBloc extends Bloc<FoodEvent, GlobalEntryState> {
 
     selectedEntry.isSelected = !oldStateOfTappedEntry;
 
-    emit(GlobalEntryState(foodEntries: state.foodEntries));
+    emit(GlobalEntryState(
+        foodEntries: state.foodEntries, stateChangedForDate: event.forDate));
   }
 }
 
@@ -240,12 +253,17 @@ class PermissionException extends FoodEvent {
   PermissionException({required super.forDate});
 }
 
-/// This is the state for one date/page
+class PageEntryState {}
+
 class GlobalEntryState {
   final Map<DateTime, List<FoodEntryState>> foodEntries;
   final GlobalAppError? appError;
 
-  GlobalEntryState({required this.foodEntries, this.appError});
+  //we use this to only redraw pages whose entries changed
+  final DateTime? stateChangedForDate;
+
+  GlobalEntryState(
+      {required this.foodEntries, this.stateChangedForDate, this.appError});
 
   factory GlobalEntryState.init() {
     return GlobalEntryState(foodEntries: {});

lib/perdate/perdate_pageview_controller.dart

@@ -92,10 +92,9 @@ class PerDatePageViewController extends StatelessWidget {
           onDateSelected: (dateSelected) {
             if (dateSelected == null) return;
 
-            var dateDiff = dateSelected.difference(initialDate).inDays;
-
-            log("dateDiff = $dateDiff");
-            pageController.jumpToPage(initialOffset - dateDiff);
+            Navigator.of(context).push(MaterialPageRoute(
+                builder: (context) =>
+                    PerDatePageViewController(initialDate: dateSelected)));
           },
         ),
       ],

lib/perdate/perdate_widget.dart

@@ -33,6 +33,11 @@ class _PerDateWidgetState extends State<PerDateWidget>
           showNewSnackbarWith(context, pageState.appError!);
         }
       },
+      buildWhen: (previous, current) {
+        if (current.stateChangedForDate == null) return true;
+        if (current.stateChangedForDate == widget.date) return true;
+        return false;
+      },
       builder: (context, pageState) {
         return FoodEntryList(
             entries: pageState.foodEntries[widget.date] ?? [],