[Material3] Menu button text animates on hover/focus/press state #123615
Description
Menu button text animates on hover/focus/press state
A menu selection label is not supposed to animate when it is highlighted, nor does it do so on icons in the menu, only on text.
With a default theme this issue cannot be observed since text color is is same for hover/select/pressed state so it does not change. By making e.g. a themed menu version where selected item uses a quite common primary colored menu selection highlight design, the menu text becomes reversed compared to not highlighted item and the issue can be observed.
In the example, the DropdownMenu contains more icons and the odd combination of text highlight animating, while icons do not animate can be observed more easily. Neither should animate.
Expected results
Expect highlighted text and icon on a highlighted menu item button to not have any animation. It is not mentioned in M3 spec, nor can one be seen with default theme. Below a recording of it, with slow motion animation to represent expected behavior.
Screen.Recording.2023-03-28.at.19.16.59.mov
Actual results
Menu item labels animate to new label color when highlighted, but only for the for text part, not on icon part.
- Icon has correct expected behavior.
- Text has unexpected wrong behavior.
Screen.Recording.2023-03-28.at.19.19.05.mov
Issue sample code
Code sample
// MIT License
//
// Copyright (c) 2023 Mike Rydstrom
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
// A seed color for the M3 ColorScheme.
const Color seedColor = Color(0xFF6750A4);
// Make M3 ColorSchemes from a seed color.
final ColorScheme schemeLight = ColorScheme.fromSeed(
brightness: Brightness.light,
seedColor: seedColor,
);
final ColorScheme schemeDark = ColorScheme.fromSeed(
brightness: Brightness.dark,
seedColor: seedColor,
);
// Example theme
ThemeData theme(ThemeMode mode, ThemeSettings settings) {
final ColorScheme colorScheme =
mode == ThemeMode.light ? schemeLight : schemeDark;
return ThemeData(
colorScheme: colorScheme,
useMaterial3: settings.useMaterial3,
visualDensity: VisualDensity.standard,
menuButtonTheme: settings.useCustomMenu
? MenuButtonThemeData(
style: ButtonStyle(
backgroundColor: MaterialStateProperty.resolveWith(
(Set<MaterialState> states) {
if (states.contains(MaterialState.pressed)) {
return colorScheme.primary;
}
if (states.contains(MaterialState.hovered)) {
return colorScheme.primary;
}
if (states.contains(MaterialState.focused)) {
return colorScheme.primary;
}
return Colors.transparent;
},
),
foregroundColor: MaterialStateProperty.resolveWith(
(Set<MaterialState> states) {
if (states.contains(MaterialState.disabled)) {
return colorScheme.onSurface.withOpacity(0.38);
}
if (states.contains(MaterialState.pressed)) {
return colorScheme.onPrimary;
}
if (states.contains(MaterialState.hovered)) {
return colorScheme.onPrimary;
}
if (states.contains(MaterialState.focused)) {
return colorScheme.onPrimary;
}
return colorScheme.onSurface;
}),
iconColor: MaterialStateProperty.resolveWith(
(Set<MaterialState> states) {
if (states.contains(MaterialState.disabled)) {
return colorScheme.onSurface.withOpacity(0.38);
}
if (states.contains(MaterialState.pressed)) {
return colorScheme.onPrimary;
}
if (states.contains(MaterialState.hovered)) {
return colorScheme.onPrimary;
}
if (states.contains(MaterialState.focused)) {
return colorScheme.onPrimary;
}
return colorScheme.onSurfaceVariant;
}),
overlayColor: MaterialStateProperty.resolveWith(
(Set<MaterialState> states) {
if (states.contains(MaterialState.pressed)) {
return colorScheme.onPrimary.withOpacity(0.12);
}
if (states.contains(MaterialState.hovered)) {
return colorScheme.onPrimary.withOpacity(0.08);
}
if (states.contains(MaterialState.focused)) {
return colorScheme.onPrimary.withOpacity(0.12);
}
return Colors.transparent;
},
),
),
)
: null,
);
}
void main() {
runApp(const IssueDemoApp());
}
class IssueDemoApp extends StatefulWidget {
const IssueDemoApp({super.key});
@override
State<IssueDemoApp> createState() => _IssueDemoAppState();
}
class _IssueDemoAppState extends State<IssueDemoApp> {
ThemeMode themeMode = ThemeMode.light;
bool longLabel = false;
TextDirection textDirection = TextDirection.ltr;
ThemeSettings settings = const ThemeSettings(
useMaterial3: true,
useCustomMenu: true,
);
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
themeMode: themeMode,
theme: theme(ThemeMode.light, settings),
darkTheme: theme(ThemeMode.dark, settings),
home: Directionality(
textDirection: textDirection,
child: Scaffold(
appBar: AppBar(
title: const Text('MenuButton Issue'),
actions: [
IconButton(
icon: settings.useMaterial3
? const Icon(Icons.filter_3)
: const Icon(Icons.filter_2),
onPressed: () {
setState(() {
settings =
settings.copyWith(useMaterial3: !settings.useMaterial3);
});
},
tooltip: "Switch to Material ${settings.useMaterial3 ? 2 : 3}",
),
IconButton(
icon: themeMode == ThemeMode.dark
? const Icon(Icons.wb_sunny_outlined)
: const Icon(Icons.wb_sunny),
onPressed: () {
setState(() {
if (themeMode == ThemeMode.light) {
themeMode = ThemeMode.dark;
} else {
themeMode = ThemeMode.light;
}
});
},
tooltip: "Toggle brightness",
),
],
),
body: HomePage(
settings: settings,
onSettings: (ThemeSettings value) {
setState(() {
settings = value;
});
},
longLabel: longLabel,
onLongLabel: (bool value) {
setState(() {
longLabel = value;
});
},
textDirection: textDirection,
onTextDirection: (TextDirection value) {
setState(() {
textDirection = value;
});
},
),
),
),
);
}
}
class HomePage extends StatelessWidget {
const HomePage({
super.key,
required this.settings,
required this.onSettings,
required this.longLabel,
required this.onLongLabel,
required this.textDirection,
required this.onTextDirection,
});
final ThemeSettings settings;
final ValueChanged<ThemeSettings> onSettings;
final bool longLabel;
final ValueChanged<bool> onLongLabel;
final TextDirection textDirection;
final ValueChanged<TextDirection> onTextDirection;
@override
Widget build(BuildContext context) {
return ListView(
padding: const EdgeInsets.symmetric(horizontal: 16),
children: [
const SizedBox(height: 8),
const Text('Menu item text animates on hover/focus/press state change\n'
'\n'
'A menu highlight is not supposed to animate the text color '
'transition, nor does it on icons in the menu, only on text.\n'
'\n'
'With a default theme this issue cannot '
'be observed since text color is the same for hover/select/pressed '
'state, so it does not change. By making a themed menu version '
'where selected item uses a quite common primary colored menu '
'selection highlight, the menu text becomes reversed and the '
'issue can be observed.\n'
'\n'
'The DropdownMenu contains more icons and the odd combination of '
'text highlight animating while icons do not, can be observed more '
'easily.'
''),
SwitchListTile(
title: const Text('Enable custom menu theme'),
value: settings.useCustomMenu,
onChanged: (bool value) {
onSettings(settings.copyWith(useCustomMenu: value));
},
),
SwitchListTile(
title: const Text('Text directionality'),
subtitle: const Text('OFF=LTR ON=RTL'),
value: textDirection == TextDirection.rtl,
onChanged: (bool value) {
value
? onTextDirection(TextDirection.rtl)
: onTextDirection(TextDirection.ltr);
},
),
const Padding(
padding: EdgeInsets.all(12.0),
child: MenuBarShowcase(),
),
const Padding(
padding: EdgeInsets.all(12.0),
child: DropDownMenuShowcase(),
),
const SizedBox(height: 16),
const ShowColorSchemeColors(),
],
);
}
}
class MenuBarShowcase extends StatelessWidget {
const MenuBarShowcase({super.key});
@override
Widget build(BuildContext context) {
return MenuBar(
children: <Widget>[
SubmenuButton(
menuChildren: <Widget>[
MenuItemButton(
onPressed: () {
showAboutDialog(
context: context,
useRootNavigator: false,
applicationName: 'MenuBar Demo',
applicationVersion: '1.0.0',
);
},
child: const MenuAcceleratorLabel('&About'),
),
SubmenuButton(
menuChildren: <Widget>[
MenuItemButton(
onPressed: () {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(
content: Text('Saved!'),
),
);
},
child: const MenuAcceleratorLabel('&Save now'),
),
MenuItemButton(
onPressed: () {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(
content: Text('Load!'),
),
);
},
child: const MenuAcceleratorLabel('&Load now'),
),
],
child: const Text('File'),
),
MenuItemButton(
onPressed: () {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(
content: Text('Quit!'),
),
);
},
child: const MenuAcceleratorLabel('&Quit'),
),
],
child: const MenuAcceleratorLabel('&File'),
),
SubmenuButton(
menuChildren: <Widget>[
MenuItemButton(
onPressed: () {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(
content: Text('Bold!'),
),
);
},
child: const MenuAcceleratorLabel('&Bold'),
),
MenuItemButton(
onPressed: () {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(
content: Text('Italic!'),
),
);
},
child: const MenuAcceleratorLabel('&Italic'),
),
MenuItemButton(
onPressed: () {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(
content: Text('Underline!'),
),
);
},
child: const MenuAcceleratorLabel('&Underline'),
),
],
child: const MenuAcceleratorLabel('&Style'),
),
SubmenuButton(
menuChildren: <Widget>[
const MenuItemButton(
onPressed: null,
child: MenuAcceleratorLabel('&Disabled item'),
),
MenuItemButton(
onPressed: () {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(
content: Text('Minify!'),
),
);
},
child: const MenuAcceleratorLabel('Mi&nify'),
),
],
child: const MenuAcceleratorLabel('&View'),
),
],
);
}
}
class DropDownMenuShowcase extends StatefulWidget {
const DropDownMenuShowcase({super.key});
@override
State<DropDownMenuShowcase> createState() => _DropDownMenuShowcaseState();
}
class _DropDownMenuShowcaseState extends State<DropDownMenuShowcase> {
String selectedItem = '';
@override
Widget build(BuildContext context) {
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
DropdownMenu<String>(
initialSelection: selectedItem,
onSelected: (String? value) {
setState(() {
selectedItem = value ?? 'one';
});
},
dropdownMenuEntries: const <DropdownMenuEntry<String>>[
DropdownMenuEntry<String>(
label: 'Alarm settings',
leadingIcon: Icon(Icons.alarm),
value: 'one',
),
DropdownMenuEntry<String>(
label: 'Disabled settings',
leadingIcon: Icon(Icons.settings),
value: 'two',
enabled: false,
),
DropdownMenuEntry<String>(
label: 'Cabin overview',
leadingIcon: Icon(Icons.cabin),
value: 'three',
),
DropdownMenuEntry<String>(
label: 'Surveillance view',
leadingIcon: Icon(Icons.camera_outdoor_rounded),
value: 'four',
),
DropdownMenuEntry<String>(
label: 'Water alert',
leadingIcon: Icon(Icons.water_damage),
value: 'five',
),
],
),
],
);
}
}
/// A Theme Settings class to bundle properties we want to modify on our
/// theme interactively.
@immutable
class ThemeSettings with Diagnosticable {
final bool useMaterial3;
final bool useCustomMenu;
const ThemeSettings({
required this.useMaterial3,
required this.useCustomMenu,
});
/// Flutter debug properties override, includes toString.
@override
void debugFillProperties(DiagnosticPropertiesBuilder properties) {
super.debugFillProperties(properties);
properties.add(DiagnosticsProperty<bool>('useMaterial3', useMaterial3));
properties.add(DiagnosticsProperty<bool>('useCustomMenu', useCustomMenu));
}
/// Copy the object with one or more provided properties changed.
ThemeSettings copyWith({
bool? useMaterial3,
bool? useCustomMenu,
}) {
return ThemeSettings(
useMaterial3: useMaterial3 ?? this.useMaterial3,
useCustomMenu: useCustomMenu ?? this.useCustomMenu,
);
}
/// Override the equality operator.
@override
bool operator ==(Object other) {
if (identical(this, other)) return true;
if (other.runtimeType != runtimeType) return false;
return other is ThemeSettings &&
other.useMaterial3 == useMaterial3 &&
other.useCustomMenu == useCustomMenu;
}
/// Override for hashcode, dart.ui Jenkins based.
@override
int get hashCode => Object.hashAll(<Object?>[
useMaterial3.hashCode,
useCustomMenu.hashCode,
]);
}
/// Draw a number of boxes showing the colors of key theme color properties
/// in the ColorScheme of the inherited ThemeData and its color properties.
class ShowColorSchemeColors extends StatelessWidget {
const ShowColorSchemeColors({super.key, this.onBackgroundColor});
/// The color of the background the color widget are being drawn on.
///
/// Some of the theme colors may have semi transparent fill color. To compute
/// a legible text color for the sum when it shown on a background color, we
/// need to alpha merge it with background and we need the exact background
/// color it is drawn on for that. If not passed in from parent, it is
/// assumed to be drawn on card color, which usually is close enough.
final Color? onBackgroundColor;
// Return true if the color is light, meaning it needs dark text for contrast.
static bool _isLight(final Color color) =>
ThemeData.estimateBrightnessForColor(color) == Brightness.light;
// On color used when a theme color property does not have a theme onColor.
static Color _onColor(final Color color, final Color bg) =>
_isLight(Color.alphaBlend(color, bg)) ? Colors.black : Colors.white;
@override
Widget build(BuildContext context) {
final ThemeData theme = Theme.of(context);
final ColorScheme colorScheme = theme.colorScheme;
final bool useMaterial3 = theme.useMaterial3;
const double spacing = 4;
// Grab the card border from the theme card shape
ShapeBorder? border = theme.cardTheme.shape;
// If we had one, copy in a border side to it.
if (border is RoundedRectangleBorder) {
border = border.copyWith(
side: BorderSide(
color: colorScheme.outlineVariant,
width: 1,
),
);
// If
} else {
// If border was null, make one matching Card default, but with border
// side, if it was not null, we leave it as it was.
border ??= RoundedRectangleBorder(
borderRadius: BorderRadius.all(Radius.circular(useMaterial3 ? 12 : 4)),
side: BorderSide(
color: colorScheme.outlineVariant,
width: 1,
),
);
}
// Get effective background color.
final Color background =
onBackgroundColor ?? theme.cardTheme.color ?? theme.cardColor;
// Wrap this widget branch in a custom theme where card has a border outline
// if it did not have one, but retains its ambient themed border radius.
return Theme(
data: Theme.of(context).copyWith(
cardTheme: CardTheme.of(context).copyWith(
elevation: 0,
surfaceTintColor: Colors.transparent,
shape: border,
),
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Padding(
padding: const EdgeInsets.symmetric(vertical: 8),
child: Text(
'ColorScheme Colors',
style: theme.textTheme.titleMedium,
),
),
Wrap(
alignment: WrapAlignment.start,
crossAxisAlignment: WrapCrossAlignment.center,
spacing: spacing,
runSpacing: spacing,
children: <Widget>[
ColorCard(
label: 'Primary',
color: colorScheme.primary,
textColor: colorScheme.onPrimary,
),
ColorCard(
label: 'on\nPrimary',
color: colorScheme.onPrimary,
textColor: colorScheme.primary,
),
ColorCard(
label: 'Primary\nContainer',
color: colorScheme.primaryContainer,
textColor: colorScheme.onPrimaryContainer,
),
ColorCard(
label: 'onPrimary\nContainer',
color: colorScheme.onPrimaryContainer,
textColor: colorScheme.primaryContainer,
),
ColorCard(
label: 'Secondary',
color: colorScheme.secondary,
textColor: colorScheme.onSecondary,
),
ColorCard(
label: 'on\nSecondary',
color: colorScheme.onSecondary,
textColor: colorScheme.secondary,
),
ColorCard(
label: 'Secondary\nContainer',
color: colorScheme.secondaryContainer,
textColor: colorScheme.onSecondaryContainer,
),
ColorCard(
label: 'on\nSecondary\nContainer',
color: colorScheme.onSecondaryContainer,
textColor: colorScheme.secondaryContainer,
),
ColorCard(
label: 'Tertiary',
color: colorScheme.tertiary,
textColor: colorScheme.onTertiary,
),
ColorCard(
label: 'on\nTertiary',
color: colorScheme.onTertiary,
textColor: colorScheme.tertiary,
),
ColorCard(
label: 'Tertiary\nContainer',
color: colorScheme.tertiaryContainer,
textColor: colorScheme.onTertiaryContainer,
),
ColorCard(
label: 'on\nTertiary\nContainer',
color: colorScheme.onTertiaryContainer,
textColor: colorScheme.tertiaryContainer,
),
ColorCard(
label: 'Error',
color: colorScheme.error,
textColor: colorScheme.onError,
),
ColorCard(
label: 'on\nError',
color: colorScheme.onError,
textColor: colorScheme.error,
),
ColorCard(
label: 'Error\nContainer',
color: colorScheme.errorContainer,
textColor: colorScheme.onErrorContainer,
),
ColorCard(
label: 'onError\nContainer',
color: colorScheme.onErrorContainer,
textColor: colorScheme.errorContainer,
),
ColorCard(
label: 'Background',
color: colorScheme.background,
textColor: colorScheme.onBackground,
),
ColorCard(
label: 'on\nBackground',
color: colorScheme.onBackground,
textColor: colorScheme.background,
),
ColorCard(
label: 'Surface',
color: colorScheme.surface,
textColor: colorScheme.onSurface,
),
ColorCard(
label: 'on\nSurface',
color: colorScheme.onSurface,
textColor: colorScheme.surface,
),
ColorCard(
label: 'Surface\nVariant',
color: colorScheme.surfaceVariant,
textColor: colorScheme.onSurfaceVariant,
),
ColorCard(
label: 'onSurface\nVariant',
color: colorScheme.onSurfaceVariant,
textColor: colorScheme.surfaceVariant,
),
ColorCard(
label: 'Outline',
color: colorScheme.outline,
textColor: colorScheme.background,
),
ColorCard(
label: 'Outline\nVariant',
color: colorScheme.outlineVariant,
textColor: colorScheme.onBackground,
),
ColorCard(
label: 'Shadow',
color: colorScheme.shadow,
textColor: _onColor(colorScheme.shadow, background),
),
ColorCard(
label: 'Scrim',
color: colorScheme.scrim,
textColor: _onColor(colorScheme.scrim, background),
),
ColorCard(
label: 'Inverse\nSurface',
color: colorScheme.inverseSurface,
textColor: colorScheme.onInverseSurface,
),
ColorCard(
label: 'onInverse\nSurface',
color: colorScheme.onInverseSurface,
textColor: colorScheme.inverseSurface,
),
ColorCard(
label: 'Inverse\nPrimary',
color: colorScheme.inversePrimary,
textColor: colorScheme.inverseSurface,
),
ColorCard(
label: 'Surface\nTint',
color: colorScheme.surfaceTint,
textColor: colorScheme.onPrimary,
),
],
),
],
),
);
}
}
/// A [SizedBox] with a [Card] and string text in it. Used in this demo to
/// display theme color boxes.
///
/// Can specify label text color and background color.
class ColorCard extends StatelessWidget {
const ColorCard({
super.key,
required this.label,
required this.color,
required this.textColor,
this.size,
});
final String label;
final Color color;
final Color textColor;
final Size? size;
@override
Widget build(BuildContext context) {
const double fontSize = 11;
const Size effectiveSize = Size(86, 58);
return SizedBox(
width: effectiveSize.width,
height: effectiveSize.height,
child: Card(
margin: EdgeInsets.zero,
clipBehavior: Clip.antiAlias,
color: color,
child: Center(
child: Text(
label,
style: TextStyle(color: textColor, fontSize: fontSize),
textAlign: TextAlign.center,
),
),
),
);
}
}
Used Flutter version
Channel master, 3.9.0-18.0.pre.39
Flutter doctor
flutter doctor -v
[✓] Flutter (Channel master, 3.9.0-18.0.pre.39, on macOS 13.2.1 22D68 darwin-arm64, locale en-US)
• Flutter version 3.9.0-18.0.pre.39 on channel master at /Users/rydmike/fvm/versions/master
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision f528f9f56c (58 minutes ago), 2023-03-28 11:15:08 -0400
• Engine revision 0b1c7c8760
• Dart version 3.0.0 (build 3.0.0-375.0.dev)
• DevTools version 2.22.2
• If those were intentional, you can disregard the above warnings; however it is recommended
to use "git" directly to perform update checks and upgrades.
[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.0)
• Android SDK at /Users/rydmike/Library/Android/sdk
• Platform android-33, build-tools 33.0.0
• Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 11.0.15+0-b2043.56-8887301)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 14.2)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 14C18
• CocoaPods version 1.11.3
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2022.1)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 11.0.15+0-b2043.56-8887301)
[✓] IntelliJ IDEA Community Edition (version 2022.3.3)
• IntelliJ at /Applications/IntelliJ IDEA CE.app
• Flutter plugin version 72.1.4
• Dart plugin version 223.8888
[✓] VS Code (version 1.76.2)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.60.0
[✓] Connected device (2 available)
• macOS (desktop) • macos • darwin-arm64 • macOS 13.2.1 22D68 darwin-arm64
• Chrome (web) • chrome • web-javascript • Google Chrome 111.0.5563.146
[✓] Network resources
• All expected network resources are available.
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