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* Add M2 defaults and template skeleton * add MaterialStateColor functionality to ActionTextColor (issue #110402) * Add M2 defaults and template skeleton * updated material 3 tokens * Updated snackbar demo * add theme tests * add gen defaults * formatting * more whitespace fixes * add widget type * update docs * code review changes * Add line overflow functionality * whitespace fixes * update M3 animation * whitespace fixes * add insetPadding param * Modifed icon parameter to showCloseIcon * white space fixes * test fixes * rename iconColor to closeIconColor * debug test fix * de-britishification * g3fix * g3fix * debug test fix
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// Copyright 2014 The Flutter Authors. All rights reserved. | ||
// Use of this source code is governed by a BSD-style license that can be | ||
// found in the LICENSE file. | ||
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import 'template.dart'; | ||
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class SnackbarTemplate extends TokenTemplate { | ||
const SnackbarTemplate( | ||
this.tokenGroup, super.blockName, super.fileName, super.tokens, { | ||
super.colorSchemePrefix = '_colors.' | ||
}); | ||
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final String tokenGroup; | ||
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@override | ||
String generate() => ''' | ||
class _${blockName}DefaultsM3 extends SnackBarThemeData { | ||
_${blockName}DefaultsM3(this.context); | ||
final BuildContext context; | ||
late final ThemeData _theme = Theme.of(context); | ||
late final ColorScheme _colors = _theme.colorScheme; | ||
@override | ||
Color get backgroundColor => ${componentColor("$tokenGroup.container")}; | ||
@override | ||
Color get actionTextColor => MaterialStateColor.resolveWith((Set<MaterialState> states) { | ||
if (states.contains(MaterialState.disabled)) { | ||
return ${componentColor("$tokenGroup.action.pressed.label-text")}; | ||
} | ||
if (states.contains(MaterialState.pressed)) { | ||
return ${componentColor("$tokenGroup.action.pressed.label-text")}; | ||
} | ||
if (states.contains(MaterialState.hovered)) { | ||
return ${componentColor("$tokenGroup.action.hover.label-text")}; | ||
} | ||
if (states.contains(MaterialState.focused)) { | ||
return ${componentColor("$tokenGroup.action.focus.label-text")}; | ||
} | ||
return ${componentColor("$tokenGroup.action.label-text")}; | ||
}); | ||
@override | ||
Color get disabledActionTextColor => | ||
${componentColor("$tokenGroup.action.pressed.label-text")}; | ||
@override | ||
TextStyle get contentTextStyle => | ||
${textStyle("$tokenGroup.supporting-text")}!.copyWith | ||
(color: ${componentColor("$tokenGroup.supporting-text")}, | ||
); | ||
@override | ||
double get elevation => ${elevation("$tokenGroup.container")}; | ||
@override | ||
ShapeBorder get shape => ${shape("$tokenGroup.container")}; | ||
@override | ||
SnackBarBehavior get behavior => SnackBarBehavior.fixed; | ||
@override | ||
EdgeInsets get insetPadding => const EdgeInsets.fromLTRB(15.0, 5.0, 15.0, 10.0); | ||
@override | ||
bool get showCloseIcon => false; | ||
@override | ||
Color get iconColor => _colors.onInverseSurface; | ||
} | ||
'''; | ||
} |
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// Copyright 2014 The Flutter Authors. All rights reserved. | ||
// Use of this source code is governed by a BSD-style license that can be | ||
// found in the LICENSE file. | ||
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/// Flutter code sample for [SnackBar] with Material 3 specifications. | ||
import 'package:flutter/material.dart'; | ||
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void main() => runApp(const MyApp()); | ||
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// A Material 3 [SnackBar] demonstrating an optional icon, in either floating | ||
// or fixed format. | ||
class MyApp extends StatelessWidget { | ||
const MyApp({super.key}); | ||
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static const String _title = 'Flutter Code Sample'; | ||
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@override | ||
Widget build(BuildContext context) { | ||
return MaterialApp( | ||
title: _title, | ||
theme: ThemeData(useMaterial3: true), | ||
home: Scaffold( | ||
appBar: AppBar(title: const Text(_title)), | ||
body: const Center( | ||
child: SnackBarExample(), | ||
), | ||
), | ||
); | ||
} | ||
} | ||
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class SnackBarExample extends StatefulWidget { | ||
const SnackBarExample({super.key}); | ||
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@override | ||
State<SnackBarExample> createState() => _SnackBarExampleState(); | ||
} | ||
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class _SnackBarExampleState extends State<SnackBarExample> { | ||
SnackBarBehavior? _snackBarBehavior = SnackBarBehavior.floating; | ||
bool _withIcon = true; | ||
bool _withAction = true; | ||
bool _multiLine = false; | ||
bool _longActionLabel = false; | ||
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Padding _configRow(List<Widget> children) => Padding( | ||
padding: const EdgeInsets.all(8.0), child: Row(children: children)); | ||
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@override | ||
Widget build(BuildContext context) { | ||
return Padding(padding: const EdgeInsets.only(left: 50.0), child: Column( | ||
children: <Widget>[ | ||
_configRow(<Widget>[ | ||
Text('Snack Bar configuration', | ||
style: Theme.of(context).textTheme.bodyLarge), | ||
]), | ||
_configRow( | ||
<Widget>[ | ||
const Text('Fixed'), | ||
Radio<SnackBarBehavior>( | ||
value: SnackBarBehavior.fixed, | ||
groupValue: _snackBarBehavior, | ||
onChanged: (SnackBarBehavior? value) { | ||
setState(() { | ||
_snackBarBehavior = value; | ||
}); | ||
}, | ||
), | ||
const Text('Floating'), | ||
Radio<SnackBarBehavior>( | ||
value: SnackBarBehavior.floating, | ||
groupValue: _snackBarBehavior, | ||
onChanged: (SnackBarBehavior? value) { | ||
setState(() { | ||
_snackBarBehavior = value; | ||
}); | ||
}, | ||
), | ||
], | ||
), | ||
_configRow( | ||
<Widget>[ | ||
const Text('Include Icon '), | ||
Switch( | ||
value: _withIcon, | ||
onChanged: (bool value) { | ||
setState(() { | ||
_withIcon = !_withIcon; | ||
}); | ||
}, | ||
), | ||
], | ||
), | ||
_configRow( | ||
<Widget>[ | ||
const Text('Include Action '), | ||
Switch( | ||
value: _withAction, | ||
onChanged: (bool value) { | ||
setState(() { | ||
_withAction = !_withAction; | ||
}); | ||
}, | ||
), | ||
const SizedBox(width: 16.0), | ||
const Text('Long Action Label '), | ||
Switch( | ||
value: _longActionLabel, | ||
onChanged: !_withAction | ||
? null | ||
: (bool value) { | ||
setState(() { | ||
_longActionLabel = !_longActionLabel; | ||
}); | ||
}, | ||
), | ||
], | ||
), | ||
_configRow( | ||
<Widget>[ | ||
const Text('Multi Line Text'), | ||
Switch( | ||
value: _multiLine, | ||
onChanged: _snackBarBehavior == SnackBarBehavior.fixed ? null : (bool value) { | ||
setState(() { | ||
_multiLine = !_multiLine; | ||
}); | ||
}, | ||
), | ||
], | ||
), | ||
const SizedBox(height: 16.0), | ||
ElevatedButton( | ||
child: const Text('Show Snackbar'), | ||
onPressed: () { | ||
ScaffoldMessenger.of(context).showSnackBar(_snackBar()); | ||
} | ||
), | ||
], | ||
), | ||
); | ||
} | ||
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SnackBar _snackBar() { | ||
final SnackBarAction? action = _withAction | ||
? SnackBarAction( | ||
label: _longActionLabel ? 'Long Action Text' : 'Action', | ||
onPressed: () { | ||
// Code to execute. | ||
}, | ||
) | ||
: null; | ||
final double? width = | ||
_snackBarBehavior == SnackBarBehavior.floating && _multiLine ? 400.0 : null; | ||
final String label = _multiLine | ||
? 'A Snack Bar with quite a lot of text which spans across multiple lines' | ||
: 'Single Line Snack Bar'; | ||
return SnackBar( | ||
content: Text(label), | ||
showCloseIcon: _withIcon, | ||
width: width, | ||
behavior: _snackBarBehavior, | ||
action: action, | ||
duration: const Duration(seconds: 3), | ||
); | ||
} | ||
} |
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