Re-enable TTS settings in the example app

flutter_readium/example/lib/main.dart

@@ -32,10 +32,7 @@ Future<void> main() async {
             return bloc;
           },
         ),
-        // BlocProvider(
-        //   create: (final _) => TtsSettingsBloc(),
-        //   lazy: false,
-        // ),
+        BlocProvider(create: (final _) => TtsSettingsBloc(), lazy: false),
         BlocProvider(create: (final _) => PlayerControlsBloc()),
       ],
       child: MyApp(),

flutter_readium/example/lib/pages/player.page.dart

@@ -65,24 +65,21 @@ class _PlayerPageState extends State<PlayerPage> with RestorationMixin {
   );
 
   List<Widget> _buildActionButtons() => <Widget>[
-    // IconButton(
-    //   icon: const Icon(Icons.headphones),
-    //   onPressed: () {
-    //     context.read<TtsSettingsBloc>().add(GetTtsVoicesEvent());
+    IconButton(
+      icon: const Icon(Icons.headphones),
+      onPressed: () {
+        context.read<TtsSettingsBloc>().add(GetTtsVoicesEvent());
 
-    //     final pubLang =
-    //         context.read<PublicationBloc>().state.publication?.metadata.language ?? ['en'];
+        final pubLang = context.read<PublicationBloc>().state.publication?.metadata.languages ?? ['en'];
 
-    //     showModalBottomSheet(
-    //       context: context,
-    //       isScrollControlled: true,
-    //       builder: (final context) => TtsSettingsWidget(
-    //         pubLang: pubLang,
-    //       ),
-    //     );
-    //   },
-    //   tooltip: 'Open tts settings',
-    // ),
+        showModalBottomSheet(
+          context: context,
+          isScrollControlled: true,
+          builder: (final context) => TtsSettingsWidget(pubLang: pubLang),
+        );
+      },
+      tooltip: 'Open tts settings',
+    ),
     IconButton(
       icon: const Icon(Icons.format_paint),
       onPressed: () {

flutter_readium/example/lib/state/player_controls_bloc.dart

@@ -8,63 +8,85 @@ import 'package:collection/collection.dart';
 
 import 'package:flutter_readium/flutter_readium.dart';
 
-abstract class PlayerControlsEvent {}
+@immutable
+abstract class PlayerControlsEvent {
+  const PlayerControlsEvent();
+}
 
+@immutable
 class PlayTTS extends PlayerControlsEvent {
-  PlayTTS({this.fromLocator});
+  const PlayTTS({this.fromLocator, this.ttsPreferences});
 
   final Locator? fromLocator;
+  final TTSPreferences? ttsPreferences;
 }
 
+@immutable
 class Play extends PlayerControlsEvent {
-  Play({this.fromLocator});
+  const Play({this.fromLocator, this.audioPreferences});
 
   final Locator? fromLocator;
+  final AudioPreferences? audioPreferences;
 }
 
+@immutable
 class Pause extends PlayerControlsEvent {}
 
+@immutable
 class Stop extends PlayerControlsEvent {}
 
+@immutable
 class TogglePlayingState extends PlayerControlsEvent {
-  TogglePlayingState({required this.isPlaying});
-  bool isPlaying;
+  const TogglePlayingState({required this.isPlaying});
+  final bool isPlaying;
 }
 
-class SkipToNext extends PlayerControlsEvent {}
+@immutable
+class SkipToNext extends PlayerControlsEvent {
+  const SkipToNext();
+}
 
-class SkipToPrevious extends PlayerControlsEvent {}
+@immutable
+class SkipToPrevious extends PlayerControlsEvent {
+  const SkipToPrevious();
+}
 
+@immutable
 class SkipToNextChapter extends PlayerControlsEvent {
-  SkipToNextChapter({required this.publication});
+  const SkipToNextChapter({required this.publication});
   final Publication publication;
 }
 
+@immutable
 class SkipToPreviousChapter extends PlayerControlsEvent {
-  SkipToPreviousChapter({required this.publication});
+  const SkipToPreviousChapter({required this.publication});
   final Publication publication;
 }
 
+@immutable
 class SkipToNextPage extends PlayerControlsEvent {}
 
+@immutable
 class SkipToPreviousPage extends PlayerControlsEvent {}
 
+@immutable
 class GoToLocator extends PlayerControlsEvent {
-  GoToLocator(this.locator);
+  const GoToLocator(this.locator);
 
   final Locator locator;
 }
 
 class GetAvailableVoices extends PlayerControlsEvent {}
 
+@immutable
 class UpdateCurrentTocHref extends PlayerControlsEvent {
-  UpdateCurrentTocHref(this.tocHref);
+  const UpdateCurrentTocHref(this.tocHref);
 
   final String tocHref;
 }
 
 class PlayerControlsState {
-  PlayerControlsState({
+  const PlayerControlsState({
     required this.playing,
     required this.ttsEnabled,
     required this.audioEnabled,
@@ -147,7 +169,7 @@ class PlayerControlsBloc extends Bloc<PlayerControlsEvent, PlayerControlsState>
 
     on<PlayTTS>((final event, final emit) async {
       if (!state.ttsEnabled) {
-        await instance.ttsEnable(TTSPreferences(speed: 1.2));
+        await instance.ttsEnable(event.ttsPreferences ?? TTSPreferences(speed: 1.2));
         await instance.play(event.fromLocator);
         emit(state.toggleTTSEnabled(true, event.fromLocator?.locations?.tocHref));
       } else {
@@ -158,7 +180,7 @@ class PlayerControlsBloc extends Bloc<PlayerControlsEvent, PlayerControlsState>
     on<Play>((final event, final emit) async {
       if (!state.audioEnabled) {
         await instance.audioEnable(
-          prefs: AudioPreferences(speed: 1.5, seekInterval: 10),
+          prefs: event.audioPreferences ?? AudioPreferences(speed: 1.5, seekInterval: 10),
           fromLocator: event.fromLocator,
         );
         emit(state.toggleAudioEnabled(true, event.fromLocator?.locations?.tocHref));