accessibility: remove animations (expansion panels)

lib/theme/durations.dart

@@ -103,6 +103,7 @@ class DurationsProvider extends StatelessWidget {
 @immutable
 class DurationsData {
   // common animations
+  final Duration expansionTileAnimation;
   final Duration staggeredAnimation;
   final Duration staggeredAnimationPageTarget;
 
@@ -110,12 +111,14 @@ class DurationsData {
   final Duration staggeredAnimationDelay;
 
   const DurationsData({
+    this.expansionTileAnimation = const Duration(milliseconds: 200),
     this.staggeredAnimation = const Duration(milliseconds: 375),
     this.staggeredAnimationPageTarget = const Duration(milliseconds: 800),
   }) : staggeredAnimationDelay = staggeredAnimation ~/ 6;
 
   factory DurationsData.noAnimation() {
     return DurationsData(
+      expansionTileAnimation: const Duration(microseconds: 1), // as of Flutter v2.5.1, `ExpansionPanelList` throws if animation duration is zero
       staggeredAnimation: Duration.zero,
       staggeredAnimationPageTarget: Duration.zero,
     );

lib/widgets/about/bug_report.dart

@@ -5,6 +5,7 @@ import 'dart:typed_data';
 import 'package:aves/flutter_version.dart';
 import 'package:aves/ref/mime_types.dart';
 import 'package:aves/services/common/services.dart';
+import 'package:aves/theme/durations.dart';
 import 'package:aves/utils/constants.dart';
 import 'package:aves/widgets/common/action_mixins/feedback.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
@@ -15,6 +16,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:intl/intl.dart';
 import 'package:package_info_plus/package_info_plus.dart';
+import 'package:provider/provider.dart';
 import 'package:url_launcher/url_launcher.dart';
 
 class BugReport extends StatefulWidget {
@@ -37,10 +39,12 @@ class _BugReportState extends State<BugReport> with FeedbackMixin {
   @override
   Widget build(BuildContext context) {
     final l10n = context.l10n;
+    final animationDuration = context.select<DurationsData, Duration>((v) => v.expansionTileAnimation);
     return ExpansionPanelList(
       expansionCallback: (index, isExpanded) {
         setState(() => _showInstructions = !isExpanded);
       },
+      animationDuration: animationDuration,
       expandedHeaderPadding: EdgeInsets.zero,
       elevation: 0,
       children: [

lib/widgets/common/identity/aves_expansion_tile.dart

@@ -1,6 +1,8 @@
+import 'package:aves/theme/durations.dart';
 import 'package:aves/widgets/common/identity/highlight_title.dart';
 import 'package:expansion_tile_card/expansion_tile_card.dart';
 import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
 
 class AvesExpansionTile extends StatelessWidget {
   final String value;
@@ -42,6 +44,8 @@ class AvesExpansionTile extends StatelessWidget {
         ],
       );
     }
+
+    final animationDuration = context.select<DurationsData, Duration>((v) => v.expansionTileAnimation);
     final theme = Theme.of(context);
     return Theme(
       data: theme.copyWith(
@@ -61,6 +65,7 @@ class AvesExpansionTile extends StatelessWidget {
         finalPadding: const EdgeInsets.symmetric(vertical: 6.0),
         baseColor: Colors.grey.shade900,
         expandedColor: Colors.grey[850],
+        duration: animationDuration,
         shadowColor: theme.shadowColor,
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,

lib/widgets/dialogs/edit_entry_date_dialog.dart

@@ -1,10 +1,12 @@
 import 'package:aves/model/entry.dart';
 import 'package:aves/model/metadata/date_modifier.dart';
 import 'package:aves/model/metadata/enums.dart';
+import 'package:aves/theme/durations.dart';
 import 'package:aves/theme/format.dart';
 import 'package:aves/theme/icons.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
 
 import 'aves_dialog.dart';
 
@@ -104,6 +106,7 @@ class _EditEntryDateDialogState extends State<EditEntryDateDialog> {
       title: _tileText(l10n.editEntryDateDialogClear),
     );
 
+    final animationDuration = context.select<DurationsData, Duration>((v) => v.expansionTileAnimation);
     final theme = Theme.of(context);
     return Theme(
       data: theme.copyWith(
@@ -125,6 +128,7 @@ class _EditEntryDateDialogState extends State<EditEntryDateDialog> {
               expansionCallback: (index, isExpanded) {
                 setState(() => _showOptions = !isExpanded);
               },
+              animationDuration: animationDuration,
               expandedHeaderPadding: EdgeInsets.zero,
               elevation: 0,
               children: [

lib/widgets/dialogs/remove_entry_metadata_dialog.dart

@@ -2,12 +2,14 @@ import 'package:aves/model/entry.dart';
 import 'package:aves/model/metadata/enums.dart';
 import 'package:aves/ref/brand_colors.dart';
 import 'package:aves/ref/mime_types.dart';
+import 'package:aves/theme/durations.dart';
 import 'package:aves/utils/color_utils.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves/widgets/common/fx/highlight_decoration.dart';
 import 'package:aves/widgets/common/identity/highlight_title.dart';
 import 'package:collection/collection.dart';
 import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
 
 import 'aves_dialog.dart';
 
@@ -46,6 +48,7 @@ class _RemoveEntryMetadataDialogState extends State<RemoveEntryMetadataDialog> {
   @override
   Widget build(BuildContext context) {
     final l10n = context.l10n;
+    final animationDuration = context.select<DurationsData, Duration>((v) => v.expansionTileAnimation);
     return AvesDialog(
       context: context,
       title: l10n.removeEntryMetadataDialogTitle,
@@ -58,6 +61,7 @@ class _RemoveEntryMetadataDialogState extends State<RemoveEntryMetadataDialog> {
               expansionCallback: (index, isExpanded) {
                 setState(() => _showMore = !isExpanded);
               },
+              animationDuration: animationDuration,
               expandedHeaderPadding: EdgeInsets.zero,
               elevation: 0,
               children: [