feat(ui): Hide the button when scrolled to the bottom

flake.lock

@@ -1,12 +1,15 @@
 {
   "nodes": {
     "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
       "locked": {
-        "lastModified": 1667395993,
+        "lastModified": 1681202837,
-        "narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
+        "narHash": "sha256-H+Rh19JDwRtpVPAWp64F+rlEtxUWBAQW28eAi3SRSzg=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
+        "rev": "cfacdce06f30d2b68473a46042957675eebb3401",
         "type": "github"
       },
       "original": {
@@ -17,16 +20,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1669165918,
+        "lastModified": 1676076353,
-        "narHash": "sha256-hIVruk2+0wmw/Kfzy11rG3q7ev3VTi/IKVODeHcVjFo=",
+        "narHash": "sha256-mdUtE8Tp40cZETwcq5tCwwLqkJVV1ULJQ5GKRtbshag=",
-        "owner": "NixOS",
+        "owner": "AtaraxiaSjel",
         "repo": "nixpkgs",
-        "rev": "3b400a525d92e4085e46141ff48cbf89fd89739e",
+        "rev": "5deb99bdccbbb97e7562dee4ba8a3ee3021688e6",
         "type": "github"
       },
       "original": {
-        "owner": "NixOS",
+        "owner": "AtaraxiaSjel",
-        "ref": "nixpkgs-unstable",
+        "ref": "update/flutter",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -36,6 +39,21 @@
         "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs"
       }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
     }
   },
   "root": "root",

flake.nix

@@ -1,7 +1,7 @@
 {
   description = "AniTrack";
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    nixpkgs.url = "github:AtaraxiaSjel/nixpkgs/update/flutter";
     flake-utils.url = "github:numtide/flake-utils";
   };
 

lib/src/ui/bloc/anime_list_bloc.dart

@@ -26,6 +26,7 @@ class AnimeListBloc extends Bloc<AnimeListEvent, AnimeListState> {
     on<MangaUpdatedEvent>(_onMangaUpdated);
     on<AnimeRemovedEvent>(_onAnimeRemoved);
     on<MangaRemovedEvent>(_onMangaRemoved);
+    on<AddButtonVisibilitySetEvent>(_onButtonVisibilityToggled);
   }
 
   /// Internal anime state
@@ -162,6 +163,7 @@ class AnimeListBloc extends Bloc<AnimeListEvent, AnimeListState> {
     emit(
       state.copyWith(
         trackingType: event.type,
+        buttonVisibility: true,
       ),
     );
   }
@@ -281,4 +283,12 @@ class AnimeListBloc extends Bloc<AnimeListEvent, AnimeListState> {
     // Update the database
     await GetIt.I.get<DatabaseService>().deleteManga(event.id);
   }
+
+  Future<void> _onButtonVisibilityToggled(AddButtonVisibilitySetEvent event, Emitter<AnimeListState> emit) async {
+    emit(
+      state.copyWith(
+        buttonVisibility: event.state,
+      ),
+    );
+  }
 }

lib/src/ui/bloc/anime_list_bloc.freezed.dart

@@ -16,6 +16,7 @@ final _privateConstructorUsedError = UnsupportedError(
 
 /// @nodoc
 mixin _$AnimeListState {
+  bool get buttonVisibility => throw _privateConstructorUsedError;
   List<AnimeTrackingData> get animes => throw _privateConstructorUsedError;
   List<MangaTrackingData> get mangas => throw _privateConstructorUsedError;
   MediumTrackingState get animeFilterState =>
@@ -35,7 +36,8 @@ abstract class $AnimeListStateCopyWith<$Res> {
           AnimeListState value, $Res Function(AnimeListState) then) =
       _$AnimeListStateCopyWithImpl<$Res>;
   $Res call(
-      {List<AnimeTrackingData> animes,
+      {bool buttonVisibility,
+      List<AnimeTrackingData> animes,
       List<MangaTrackingData> mangas,
       MediumTrackingState animeFilterState,
       MediumTrackingState mangaFilterState,
@@ -53,6 +55,7 @@ class _$AnimeListStateCopyWithImpl<$Res>
 
   @override
   $Res call({
+    Object? buttonVisibility = freezed,
     Object? animes = freezed,
     Object? mangas = freezed,
     Object? animeFilterState = freezed,
@@ -60,6 +63,10 @@ class _$AnimeListStateCopyWithImpl<$Res>
     Object? trackingType = freezed,
   }) {
     return _then(_value.copyWith(
+      buttonVisibility: buttonVisibility == freezed
+          ? _value.buttonVisibility
+          : buttonVisibility // ignore: cast_nullable_to_non_nullable
+              as bool,
       animes: animes == freezed
           ? _value.animes
           : animes // ignore: cast_nullable_to_non_nullable
@@ -92,7 +99,8 @@ abstract class _$$_AnimeListStateCopyWith<$Res>
       __$$_AnimeListStateCopyWithImpl<$Res>;
   @override
   $Res call(
-      {List<AnimeTrackingData> animes,
+      {bool buttonVisibility,
+      List<AnimeTrackingData> animes,
       List<MangaTrackingData> mangas,
       MediumTrackingState animeFilterState,
       MediumTrackingState mangaFilterState,
@@ -112,6 +120,7 @@ class __$$_AnimeListStateCopyWithImpl<$Res>
 
   @override
   $Res call({
+    Object? buttonVisibility = freezed,
     Object? animes = freezed,
     Object? mangas = freezed,
     Object? animeFilterState = freezed,
@@ -119,6 +128,10 @@ class __$$_AnimeListStateCopyWithImpl<$Res>
     Object? trackingType = freezed,
   }) {
     return _then(_$_AnimeListState(
+      buttonVisibility: buttonVisibility == freezed
+          ? _value.buttonVisibility
+          : buttonVisibility // ignore: cast_nullable_to_non_nullable
+              as bool,
       animes: animes == freezed
           ? _value._animes
           : animes // ignore: cast_nullable_to_non_nullable
@@ -147,7 +160,8 @@ class __$$_AnimeListStateCopyWithImpl<$Res>
 
 class _$_AnimeListState implements _AnimeListState {
   _$_AnimeListState(
-      {final List<AnimeTrackingData> animes = const [],
+      {this.buttonVisibility = true,
+      final List<AnimeTrackingData> animes = const [],
       final List<MangaTrackingData> mangas = const [],
       this.animeFilterState = MediumTrackingState.ongoing,
       this.mangaFilterState = MediumTrackingState.ongoing,
@@ -155,6 +169,9 @@ class _$_AnimeListState implements _AnimeListState {
       : _animes = animes,
         _mangas = mangas;
 
+  @override
+  @JsonKey()
+  final bool buttonVisibility;
   final List<AnimeTrackingData> _animes;
   @override
   @JsonKey()
@@ -183,7 +200,7 @@ class _$_AnimeListState implements _AnimeListState {
 
   @override
   String toString() {
-    return 'AnimeListState(animes: $animes, mangas: $mangas, animeFilterState: $animeFilterState, mangaFilterState: $mangaFilterState, trackingType: $trackingType)';
+    return 'AnimeListState(buttonVisibility: $buttonVisibility, animes: $animes, mangas: $mangas, animeFilterState: $animeFilterState, mangaFilterState: $mangaFilterState, trackingType: $trackingType)';
   }
 
   @override
@@ -191,6 +208,8 @@ class _$_AnimeListState implements _AnimeListState {
     return identical(this, other) ||
         (other.runtimeType == runtimeType &&
             other is _$_AnimeListState &&
+            const DeepCollectionEquality()
+                .equals(other.buttonVisibility, buttonVisibility) &&
             const DeepCollectionEquality().equals(other._animes, _animes) &&
             const DeepCollectionEquality().equals(other._mangas, _mangas) &&
             const DeepCollectionEquality()
@@ -204,6 +223,7 @@ class _$_AnimeListState implements _AnimeListState {
   @override
   int get hashCode => Object.hash(
       runtimeType,
+      const DeepCollectionEquality().hash(buttonVisibility),
       const DeepCollectionEquality().hash(_animes),
       const DeepCollectionEquality().hash(_mangas),
       const DeepCollectionEquality().hash(animeFilterState),
@@ -218,12 +238,15 @@ class _$_AnimeListState implements _AnimeListState {
 
 abstract class _AnimeListState implements AnimeListState {
   factory _AnimeListState(
-      {final List<AnimeTrackingData> animes,
+      {final bool buttonVisibility,
+      final List<AnimeTrackingData> animes,
       final List<MangaTrackingData> mangas,
       final MediumTrackingState animeFilterState,
       final MediumTrackingState mangaFilterState,
       final TrackingMediumType trackingType}) = _$_AnimeListState;
 
+  @override
+  bool get buttonVisibility;
   @override
   List<AnimeTrackingData> get animes;
   @override

lib/src/ui/bloc/anime_list_event.dart

@@ -96,3 +96,10 @@ class MangaRemovedEvent extends AnimeListEvent {
   /// The ID of the manga to be removed from the list.
   final String id;
 }
+
+class AddButtonVisibilitySetEvent extends AnimeListEvent {
+  AddButtonVisibilitySetEvent(this.state);
+
+  /// The visibility of the button
+  final bool state;
+}

lib/src/ui/bloc/anime_list_state.dart

@@ -3,6 +3,7 @@ part of 'anime_list_bloc.dart';
 @freezed
 class AnimeListState with _$AnimeListState {
   factory AnimeListState({
+    @Default(true) bool buttonVisibility,
     @Default([]) List<AnimeTrackingData> animes,
     @Default([]) List<MangaTrackingData> mangas,
     @Default(MediumTrackingState.ongoing) MediumTrackingState animeFilterState,

lib/src/ui/pages/anime_list.dart

@@ -8,9 +8,10 @@ import 'package:anitrack/src/ui/widgets/image.dart';
 import 'package:bottom_bar/bottom_bar.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:get_it/get_it.dart';
 
-class AnimeListPage extends StatelessWidget {
+class AnimeListPage extends StatefulWidget {
-  AnimeListPage({
+  const AnimeListPage({
     super.key,
   });
 
@@ -21,7 +22,37 @@ class AnimeListPage extends StatelessWidget {
     ),
   );
 
+  @override
+  AnimeListPageState createState() => AnimeListPageState();
+}
+
+class AnimeListPageState extends State<AnimeListPage> {
   final PageController _controller = PageController();
+  final ScrollController _animeScrollController = ScrollController();
+
+  @override
+  void initState() {
+    super.initState();
+    _animeScrollController.addListener(_onAnimeListScrolled);
+  }
+  
+  void _onAnimeListScrolled() {
+    //print(_animeScrollController.position.maxScrollExtent);
+    final bloc = GetIt.I.get<AnimeListBloc>();
+    if (_animeScrollController.offset + 20 >= _animeScrollController.position.maxScrollExtent) {
+      if (bloc.state.buttonVisibility) {
+        bloc.add(
+          AddButtonVisibilitySetEvent(false),
+        );
+      }
+    } else {
+      if (!bloc.state.buttonVisibility) {
+        bloc.add(
+          AddButtonVisibilitySetEvent(true),
+        );
+      }
+    }
+  }
   
   String _getPageTitle(TrackingMediumType type) {
     switch (type) {
@@ -141,6 +172,7 @@ class AnimeListPage extends StatelessWidget {
                     childAspectRatio: 120 / (100 * (16 / 9)),
                   ),
                   itemCount: state.animes.length,
+                  controller: _animeScrollController,
                   itemBuilder: (context, index) {
                     final anime = state.animes[index];
                     return GridItem(
@@ -233,15 +265,27 @@ class AnimeListPage extends StatelessWidget {
               ),
             ],
           ),
-          floatingActionButton: FloatingActionButton(
+          floatingActionButton: BlocBuilder<AnimeListBloc, AnimeListState>(
+            buildWhen: (prev, next) => prev.buttonVisibility != next.buttonVisibility,
+            builder: (context, state) {
+              return AnimatedScale(
+                duration: const Duration(milliseconds: 250),
+                scale: state.buttonVisibility ?
+                  1 :
+                  0,
+                curve: Curves.easeInOutQuint,
+                child: FloatingActionButton(
                   onPressed: () {
                     context.read<AnimeSearchBloc>().add(
                       AnimeSearchRequestedEvent(state.trackingType),
                     );
                   },
-            tooltip: 'Increment',
+                  tooltip: 'Add new item',
                   child: const Icon(Icons.add),
                 ),
+              );
+            },
+          ),
           bottomNavigationBar: BottomBar(
             selectedIndex: state.trackingType == TrackingMediumType.anime ?
               0 :

lib/src/ui/widgets/integer_input.dart

@@ -36,6 +36,15 @@ class IntegerInputState extends State<IntegerInput> {
     _controller.text = _value.toString();
   }
 
+  void _handleSubmit(String text) {
+    final value = int.parse(text);
+    if (value < 0) return;
+
+    _value = value;
+    _controller.text = '$_value';
+    widget.onChanged(_value);
+  }
+  
   @override
   Widget build(BuildContext context) {
     return Row(
@@ -56,6 +65,13 @@ class IntegerInputState extends State<IntegerInput> {
             padding: const EdgeInsets.symmetric(
               horizontal: 16,
             ),
+            child: Focus(
+              onFocusChange: (hasFocus) {
+                if (!hasFocus) {
+                  print('Handle focus loss');
+                  _handleSubmit(_controller.text);
+                }
+              },
               child: TextField(
                 decoration: InputDecoration(
                   border: const OutlineInputBorder(),
@@ -64,14 +80,8 @@ class IntegerInputState extends State<IntegerInput> {
                 keyboardType: TextInputType.number,
                 textInputAction: TextInputAction.done,
                 controller: _controller,
-              onSubmitted: (text) {
+                onSubmitted: _handleSubmit,
-                final value = int.parse(text);
+              ),
-                if (value < 0) return;
-
-                _value = value;
-                _controller.text = '$_value';
-                widget.onChanged(_value);
-              },
             ),
           ),
         ),