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Demo app for Flutter issue #107305: M3 AppBarTheme icon theme regression demo
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// MIT License | |
// | |
// Copyright (c) 2022 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/material.dart'; | |
// Light M3 ColorScheme. | |
const ColorScheme mySchemeLight = ColorScheme( | |
brightness: Brightness.light, | |
primary: Color(0xff386a20), | |
onPrimary: Color(0xffffffff), | |
primaryContainer: Color(0xffc0f0a4), | |
onPrimaryContainer: Color(0xff042100), | |
secondary: Color(0xff55624c), | |
onSecondary: Color(0xffffffff), | |
secondaryContainer: Color(0xffd9e7cb), | |
onSecondaryContainer: Color(0xff131f0d), | |
tertiary: Color(0xff386667), | |
onTertiary: Color(0xffffffff), | |
tertiaryContainer: Color(0xffbbebeb), | |
onTertiaryContainer: Color(0xff002021), | |
error: Color(0xffba1b1b), | |
onError: Color(0xffffffff), | |
errorContainer: Color(0xffffdad4), | |
onErrorContainer: Color(0xff410001), | |
outline: Color(0xff74796e), | |
background: Color(0xfffdfdf6), | |
onBackground: Color(0xff1a1c18), | |
surface: Color(0xfffdfdf6), | |
onSurface: Color(0xff1a1c18), | |
surfaceVariant: Color(0xffdfe4d6), | |
onSurfaceVariant: Color(0xff43493e), | |
inverseSurface: Color(0xff2f312c), | |
onInverseSurface: Color(0xfff1f1ea), | |
inversePrimary: Color(0xff9cd67d), | |
shadow: Color(0xff000000), | |
surfaceTint: Color(0xff386a20), | |
); | |
// Dark M3 ColorScheme. | |
const ColorScheme mySchemeDark = ColorScheme( | |
brightness: Brightness.dark, | |
primary: Color(0xff9cd67d), | |
onPrimary: Color(0xff0c3900), | |
primaryContainer: Color(0xff205107), | |
onPrimaryContainer: Color(0xffc0f0a4), | |
secondary: Color(0xffbdcbb0), | |
onSecondary: Color(0xff273420), | |
secondaryContainer: Color(0xff3e4a36), | |
onSecondaryContainer: Color(0xffd9e7cb), | |
tertiary: Color(0xffa0cfcf), | |
onTertiary: Color(0xff003738), | |
tertiaryContainer: Color(0xff1e4e4e), | |
onTertiaryContainer: Color(0xffbbebeb), | |
error: Color(0xffffb4a9), | |
onError: Color(0xff680003), | |
errorContainer: Color(0xff930006), | |
onErrorContainer: Color(0xffffb4a9), | |
outline: Color(0xff8d9286), | |
background: Color(0xff1a1c18), | |
onBackground: Color(0xffe3e3dc), | |
surface: Color(0xff1a1c18), | |
onSurface: Color(0xffe3e3dc), | |
surfaceVariant: Color(0xff43493e), | |
onSurfaceVariant: Color(0xffc4c8bb), | |
inverseSurface: Color(0xffe3e3dc), | |
onInverseSurface: Color(0xff2f312c), | |
inversePrimary: Color(0xff386a20), | |
shadow: Color(0xff000000), | |
surfaceTint: Color(0xff9cd67d), | |
); | |
const myAppBarTheme = AppBarTheme( | |
iconTheme: IconThemeData(color: Colors.deepOrange, size: 32.0), | |
actionsIconTheme: IconThemeData(color: Colors.yellow, size: 32.0), | |
); | |
// Example theme - | |
ThemeData demoTheme(Brightness mode, bool useMaterial3) => | |
mode == Brightness.light | |
? ThemeData( | |
colorScheme: mySchemeLight, | |
toggleableActiveColor: | |
useMaterial3 ? mySchemeLight.primary : mySchemeLight.secondary, | |
primaryColor: mySchemeLight.primary, | |
primaryColorLight: Color.alphaBlend( | |
Colors.white.withAlpha(0x66), mySchemeLight.primary), | |
primaryColorDark: Color.alphaBlend( | |
Colors.black.withAlpha(0x66), mySchemeLight.primary), | |
secondaryHeaderColor: Color.alphaBlend( | |
Colors.white.withAlpha(0xCC), mySchemeLight.primary), | |
scaffoldBackgroundColor: mySchemeLight.background, | |
canvasColor: mySchemeLight.background, | |
backgroundColor: mySchemeLight.background, | |
cardColor: mySchemeLight.surface, | |
bottomAppBarColor: mySchemeLight.surface, | |
dialogBackgroundColor: mySchemeLight.surface, | |
indicatorColor: mySchemeLight.onPrimary, | |
dividerColor: mySchemeLight.onSurface.withOpacity(0.12), | |
errorColor: mySchemeLight.error, | |
applyElevationOverlayColor: false, | |
useMaterial3: useMaterial3, | |
visualDensity: VisualDensity.standard, | |
appBarTheme: myAppBarTheme, | |
) | |
: ThemeData( | |
colorScheme: mySchemeDark, | |
toggleableActiveColor: | |
useMaterial3 ? mySchemeDark.primary : mySchemeDark.secondary, | |
primaryColor: mySchemeDark.primary, | |
primaryColorLight: Color.alphaBlend( | |
Colors.white.withAlpha(0x59), mySchemeDark.primary), | |
primaryColorDark: Color.alphaBlend( | |
Colors.black.withAlpha(0x72), mySchemeDark.primary), | |
secondaryHeaderColor: Color.alphaBlend( | |
Colors.black.withAlpha(0x99), mySchemeDark.primary), | |
scaffoldBackgroundColor: mySchemeDark.background, | |
canvasColor: mySchemeDark.background, | |
backgroundColor: mySchemeDark.background, | |
cardColor: mySchemeDark.surface, | |
bottomAppBarColor: mySchemeDark.surface, | |
dialogBackgroundColor: mySchemeDark.surface, | |
indicatorColor: mySchemeDark.onBackground, | |
dividerColor: mySchemeDark.onSurface.withOpacity(0.12), | |
errorColor: mySchemeDark.error, | |
applyElevationOverlayColor: true, | |
useMaterial3: useMaterial3, | |
visualDensity: VisualDensity.standard, | |
appBarTheme: myAppBarTheme, | |
); | |
void main() { | |
runApp(const IssueDemoApp()); | |
} | |
class IssueDemoApp extends StatefulWidget { | |
const IssueDemoApp({super.key}); | |
@override | |
State<IssueDemoApp> createState() => _IssueDemoAppState(); | |
} | |
class _IssueDemoAppState extends State<IssueDemoApp> { | |
bool useMaterial3 = false; | |
ThemeMode themeMode = ThemeMode.light; | |
// ThemingWay themingWay = ThemingWay.road10; | |
@override | |
Widget build(BuildContext context) { | |
return MaterialApp( | |
debugShowCheckedModeBanner: false, | |
themeMode: themeMode, | |
theme: demoTheme(Brightness.light, useMaterial3), | |
darkTheme: demoTheme(Brightness.dark, useMaterial3), | |
home: Scaffold( | |
appBar: AppBar( | |
title: const Text(('M3 AppBar Theme Issue')), | |
actions: [ | |
IconButton( | |
icon: useMaterial3 | |
? const Icon(Icons.filter_3) | |
: const Icon(Icons.filter_2), | |
onPressed: () { | |
setState(() { | |
useMaterial3 = !useMaterial3; | |
}); | |
}, | |
tooltip: "Switch to Material ${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: const HomePage(), | |
drawer: const Drawer(), | |
), | |
); | |
} | |
} | |
class HomePage extends StatelessWidget { | |
const HomePage({super.key}); | |
@override | |
Widget build(BuildContext context) { | |
final String materialType = | |
Theme.of(context).useMaterial3 ? "Material 3" : "Material 2"; | |
return ListView( | |
padding: const EdgeInsets.symmetric(horizontal: 16), | |
children: [ | |
const SizedBox(height: 8), | |
Text( | |
'Theme Demo - $materialType', | |
style: Theme.of(context).textTheme.headlineSmall, | |
), | |
const Divider(), | |
const ShowColorSchemeColors(), | |
const Divider(), | |
const ShowThemeDataColors(), | |
const Divider(), | |
const ShowAppBarThemeColors(), | |
const Divider(), | |
], | |
); | |
} | |
} | |
/// Draw a number of boxes showing the colors of key AppBar theme color | |
/// properties of the inherited ThemeData | |
class ShowAppBarThemeColors extends StatelessWidget { | |
const ShowAppBarThemeColors({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 AppBarTheme appBarTheme = theme.appBarTheme; | |
final bool useMaterial3 = theme.useMaterial3; | |
// Get effective background color. | |
final Color background = | |
onBackgroundColor ?? theme.cardTheme.color ?? theme.cardColor; | |
// 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: theme.dividerColor, | |
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: theme.dividerColor, | |
width: 1, | |
), | |
); | |
} | |
// Wrap this widget branch in a custom theme where card has a border outline | |
// if it did not have one, but retains in ambient themed border radius. | |
return Theme( | |
data: Theme.of(context).copyWith( | |
cardTheme: CardTheme.of(context).copyWith( | |
elevation: 0, | |
shape: border, | |
), | |
), | |
child: Column( | |
crossAxisAlignment: CrossAxisAlignment.start, | |
children: <Widget>[ | |
Padding( | |
padding: const EdgeInsets.symmetric(vertical: 8), | |
child: Text( | |
'Assigned AppBar Theme Colors', | |
style: theme.textTheme.titleMedium, | |
), | |
), | |
Wrap( | |
alignment: WrapAlignment.start, | |
crossAxisAlignment: WrapCrossAlignment.center, | |
spacing: 6, | |
runSpacing: 6, | |
children: <Widget>[ | |
ColorCard( | |
label: 'AppBar\nicon', | |
color: appBarTheme.iconTheme!.color!, | |
textColor: _onColor(appBarTheme.iconTheme!.color!, background), | |
), | |
ColorCard( | |
label: 'AppBar\nactionIcon', | |
color: appBarTheme.actionsIconTheme!.color!, | |
textColor: | |
_onColor(appBarTheme.actionsIconTheme!.color!, background), | |
), | |
], | |
), | |
], | |
), | |
); | |
} | |
} | |
/// 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; | |
// Return true if the color is dark, meaning it needs light text for contrast. | |
static bool _isDark(final Color color) => | |
ThemeData.estimateBrightnessForColor(color) == Brightness.dark; | |
// 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 isDark = colorScheme.brightness == Brightness.dark; | |
final bool useMaterial3 = theme.useMaterial3; | |
// 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: theme.dividerColor, | |
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: theme.dividerColor, | |
width: 1, | |
), | |
); | |
} | |
// Get effective background color. | |
final Color background = | |
onBackgroundColor ?? theme.cardTheme.color ?? theme.cardColor; | |
// Warning label for scaffold background when it uses to much blend. | |
final String surfaceTooHigh = isDark | |
? _isLight(theme.colorScheme.surface) | |
? '\nTOO HIGH' | |
: '' | |
: _isDark(theme.colorScheme.surface) | |
? '\nTOO HIGH' | |
: ''; | |
// Warning label for scaffold background when it uses to much blend. | |
final String backTooHigh = isDark | |
? _isLight(theme.colorScheme.background) | |
? '\nTOO HIGH' | |
: '' | |
: _isDark(theme.colorScheme.background) | |
? '\nTOO HIGH' | |
: ''; | |
// Wrap this widget branch in a custom theme where card has a border outline | |
// if it did not have one, but retains in ambient themed border radius. | |
return Theme( | |
data: Theme.of(context).copyWith( | |
cardTheme: CardTheme.of(context).copyWith( | |
elevation: 0, | |
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: 6, | |
runSpacing: 6, | |
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$backTooHigh', | |
color: colorScheme.background, | |
textColor: colorScheme.onBackground, | |
), | |
ColorCard( | |
label: 'on\nBackground', | |
color: colorScheme.onBackground, | |
textColor: colorScheme.background, | |
), | |
ColorCard( | |
label: 'Surface$surfaceTooHigh', | |
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: 'Shadow', | |
color: colorScheme.shadow, | |
textColor: _onColor(colorScheme.shadow, 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.primary, | |
), | |
ColorCard( | |
label: 'Surface\nTint', | |
color: colorScheme.surfaceTint, | |
textColor: colorScheme.onPrimary, | |
), | |
], | |
), | |
], | |
), | |
); | |
} | |
} | |
/// Draw a number of boxes showing the colors of key theme color properties | |
/// in the ColorScheme of the inherited ThemeData and some of its key color | |
/// properties. | |
class ShowThemeDataColors extends StatelessWidget { | |
const ShowThemeDataColors({ | |
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; | |
// Return true if the color is dark, meaning it needs light text for contrast. | |
static bool _isDark(final Color color) => | |
ThemeData.estimateBrightnessForColor(color) == Brightness.dark; | |
// On color used when a theme color property does not have a theme onColor. | |
static Color _onColor(final Color color, final Color background) => | |
_isLight(Color.alphaBlend(color, background)) | |
? Colors.black | |
: Colors.white; | |
@override | |
Widget build(BuildContext context) { | |
final ThemeData theme = Theme.of(context); | |
final ColorScheme colorScheme = theme.colorScheme; | |
final bool isDark = colorScheme.brightness == Brightness.dark; | |
final bool useMaterial3 = theme.useMaterial3; | |
// 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: theme.dividerColor, | |
width: 1, | |
), | |
); | |
} 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: theme.dividerColor, | |
width: 1, | |
), | |
); | |
} | |
// Get effective background color. | |
final Color background = | |
onBackgroundColor ?? theme.cardTheme.color ?? theme.cardColor; | |
// Warning label for scaffold background when it uses to much blend. | |
final String scaffoldTooHigh = isDark | |
? _isLight(theme.scaffoldBackgroundColor) | |
? '\nTOO HIGH' | |
: '' | |
: _isDark(theme.scaffoldBackgroundColor) | |
? '\nTOO HIGH' | |
: ''; | |
// Warning label for scaffold background when it uses to much blend. | |
final String surfaceTooHigh = isDark | |
? _isLight(theme.colorScheme.surface) | |
? '\nTOO HIGH' | |
: '' | |
: _isDark(theme.colorScheme.surface) | |
? '\nTOO HIGH' | |
: ''; | |
// Warning label for scaffold background when it uses to much blend. | |
final String backTooHigh = isDark | |
? _isLight(theme.colorScheme.background) | |
? '\nTOO HIGH' | |
: '' | |
: _isDark(theme.colorScheme.background) | |
? '\nTOO HIGH' | |
: ''; | |
// Wrap this widget branch in a custom theme where card has a border outline | |
// if it did not have one, but retains in ambient themed border radius. | |
return Theme( | |
data: Theme.of(context).copyWith( | |
cardTheme: CardTheme.of(context).copyWith( | |
elevation: 0, | |
shape: border, | |
), | |
), | |
child: Column( | |
crossAxisAlignment: CrossAxisAlignment.start, | |
children: <Widget>[ | |
Padding( | |
padding: const EdgeInsets.only(top: 8), | |
child: Text( | |
'ThemeData Colors', | |
style: theme.textTheme.titleMedium, | |
), | |
), | |
const SizedBox(height: 8), | |
Wrap( | |
spacing: 6, | |
runSpacing: 6, | |
crossAxisAlignment: WrapCrossAlignment.center, | |
children: <Widget>[ | |
ColorCard( | |
label: 'Primary\nColor', | |
color: theme.primaryColor, | |
textColor: _onColor(theme.primaryColor, background), | |
), | |
ColorCard( | |
label: 'Primary\nDark', | |
color: theme.primaryColorDark, | |
textColor: _onColor(theme.primaryColorDark, background), | |
), | |
ColorCard( | |
label: 'Primary\nLight', | |
color: theme.primaryColorLight, | |
textColor: _onColor(theme.primaryColorLight, background), | |
), | |
ColorCard( | |
label: 'Secondary\nHeader', | |
color: theme.secondaryHeaderColor, | |
textColor: _onColor(theme.secondaryHeaderColor, background), | |
), | |
ColorCard( | |
label: 'Toggleable\nActive', | |
color: theme.toggleableActiveColor, | |
textColor: _onColor(theme.toggleableActiveColor, background), | |
), | |
ColorCard( | |
label: 'Bottom\nAppBar', | |
color: theme.bottomAppBarColor, | |
textColor: _onColor(theme.bottomAppBarColor, background), | |
), | |
ColorCard( | |
label: 'Error\nColor', | |
color: theme.errorColor, | |
textColor: colorScheme.onError, | |
), | |
ColorCard( | |
label: 'Canvas$backTooHigh', | |
color: theme.canvasColor, | |
textColor: _onColor(theme.canvasColor, background), | |
), | |
ColorCard( | |
label: 'Card$surfaceTooHigh', | |
color: theme.cardColor, | |
textColor: _onColor(theme.cardColor, background), | |
), | |
ColorCard( | |
label: 'Scaffold\nBackground$scaffoldTooHigh', | |
color: theme.scaffoldBackgroundColor, | |
textColor: _onColor(theme.scaffoldBackgroundColor, background), | |
), | |
ColorCard( | |
label: 'Dialog', | |
color: theme.dialogBackgroundColor, | |
textColor: _onColor(theme.dialogBackgroundColor, background), | |
), | |
ColorCard( | |
label: 'Indicator\nColor', | |
color: theme.indicatorColor, | |
textColor: _onColor(theme.indicatorColor, background), | |
), | |
ColorCard( | |
label: 'Divider\nColor', | |
color: theme.dividerColor, | |
textColor: _onColor(theme.dividerColor, background), | |
), | |
ColorCard( | |
label: 'Disabled\nColor', | |
color: theme.disabledColor, | |
textColor: _onColor(theme.disabledColor, background), | |
), | |
ColorCard( | |
label: 'Hover\nColor', | |
color: theme.hoverColor, | |
textColor: _onColor(theme.hoverColor, background), | |
), | |
ColorCard( | |
label: 'Focus\nColor', | |
color: theme.focusColor, | |
textColor: _onColor(theme.focusColor, background), | |
), | |
ColorCard( | |
label: 'Highlight\nColor', | |
color: theme.highlightColor, | |
textColor: _onColor(theme.highlightColor, background), | |
), | |
ColorCard( | |
label: 'Splash\nColor', | |
color: theme.splashColor, | |
textColor: _onColor(theme.splashColor, background), | |
), | |
ColorCard( | |
label: 'Shadow\nColor', | |
color: theme.shadowColor, | |
textColor: _onColor(theme.shadowColor, background), | |
), | |
ColorCard( | |
label: 'Hint\nColor', | |
color: theme.hintColor, | |
textColor: _onColor(theme.hintColor, background), | |
), | |
ColorCard( | |
label: 'Selected\nRow', | |
color: theme.selectedRowColor, | |
textColor: _onColor(theme.selectedRowColor, background), | |
), | |
ColorCard( | |
label: 'Unselected\nWidget', | |
color: theme.unselectedWidgetColor, | |
textColor: _onColor(theme.unselectedWidgetColor, background), | |
), | |
], | |
), | |
], | |
), | |
); | |
} | |
} | |
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) { | |
return SizedBox( | |
width: 86, | |
height: 58, | |
child: Card( | |
margin: EdgeInsets.zero, | |
clipBehavior: Clip.antiAlias, | |
color: color, | |
child: Center( | |
child: Text( | |
label, | |
style: TextStyle(color: textColor, fontSize: 11), | |
textAlign: TextAlign.center, | |
), | |
), | |
), | |
); | |
} | |
} |
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Demo code for Flutter issue:
flutter/flutter#107305