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[NNBD] Migrate sample code pt 1 (#72794)

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Shi-Hao Hong 2020-12-23 09:04:03 +08:00 committed by GitHub
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8 changed files with 40 additions and 40 deletions
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4
packages/flutter/lib/src/material/about.dart
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@ -44,14 +44,14 @@ import 'theme.dart';
/// If your application does not have a [Drawer], you should provide an /// If your application does not have a [Drawer], you should provide an
/// affordance to call [showAboutDialog] or (at least) [showLicensePage]. /// affordance to call [showAboutDialog] or (at least) [showLicensePage].
/// ///
/// {@tool dartpad --template=stateless_widget_material_no_null_safety} /// {@tool dartpad --template=stateless_widget_material}
/// ///
/// This sample shows two ways to open [AboutDialog]. The first one /// This sample shows two ways to open [AboutDialog]. The first one
/// uses an [AboutListTile], and the second uses the [showAboutDialog] function. /// uses an [AboutListTile], and the second uses the [showAboutDialog] function.
/// ///
/// ```dart /// ```dart
/// Widget build(BuildContext context) { /// Widget build(BuildContext context) {
/// final TextStyle textStyle = Theme.of(context).textTheme.bodyText2; /// final TextStyle textStyle = Theme.of(context).textTheme.bodyText2!;
/// final List<Widget> aboutBoxChildren = <Widget>[ /// final List<Widget> aboutBoxChildren = <Widget>[
/// SizedBox(height: 24), /// SizedBox(height: 24),
/// RichText( /// RichText(

4
packages/flutter/lib/src/material/card.dart
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@ -20,7 +20,7 @@ import 'theme.dart';
/// some text describing a musical, and the other with buttons for buying /// some text describing a musical, and the other with buttons for buying
/// tickets or listening to the show.](https://flutter.github.io/assets-for-api-docs/assets/material/card.png) /// tickets or listening to the show.](https://flutter.github.io/assets-for-api-docs/assets/material/card.png)
/// ///
/// {@tool dartpad --template=stateless_widget_scaffold_no_null_safety} /// {@tool dartpad --template=stateless_widget_scaffold}
/// ///
/// This sample shows creation of a [Card] widget that shows album information /// This sample shows creation of a [Card] widget that shows album information
/// and two actions. /// and two actions.
@ -63,7 +63,7 @@ import 'theme.dart';
/// Sometimes the primary action area of a card is the card itself. Cards can be /// Sometimes the primary action area of a card is the card itself. Cards can be
/// one large touch target that shows a detail screen when tapped. /// one large touch target that shows a detail screen when tapped.
/// ///
/// {@tool dartpad --template=stateless_widget_scaffold_no_null_safety} /// {@tool dartpad --template=stateless_widget_scaffold}
/// ///
/// This sample shows creation of a [Card] widget that can be tapped. When /// This sample shows creation of a [Card] widget that can be tapped. When
/// tapped this [Card]'s [InkWell] displays an "ink splash" that fills the /// tapped this [Card]'s [InkWell] displays an "ink splash" that fills the

10
packages/flutter/lib/src/material/data_table.dart
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@ -260,7 +260,7 @@ class DataCell {
/// [PaginatedDataTable] which automatically splits the data into /// [PaginatedDataTable] which automatically splits the data into
/// multiple pages. /// multiple pages.
/// ///
/// {@tool dartpad --template=stateless_widget_scaffold_no_null_safety} /// {@tool dartpad --template=stateless_widget_scaffold}
/// ///
/// This sample shows how to display a [DataTable] with three columns: name, age, and /// This sample shows how to display a [DataTable] with three columns: name, age, and
/// role. The columns are defined by three [DataColumn] objects. The table /// role. The columns are defined by three [DataColumn] objects. The table
@ -322,7 +322,7 @@ class DataCell {
/// {@end-tool} /// {@end-tool}
/// ///
/// ///
/// {@tool dartpad --template=stateful_widget_scaffold_no_null_safety} /// {@tool dartpad --template=stateful_widget_scaffold}
/// ///
/// This sample shows how to display a [DataTable] with alternate colors per /// This sample shows how to display a [DataTable] with alternate colors per
/// row, and a custom color for when the row is selected. /// row, and a custom color for when the row is selected.
@ -344,7 +344,7 @@ class DataCell {
/// rows: List<DataRow>.generate( /// rows: List<DataRow>.generate(
/// numItems, /// numItems,
/// (index) => DataRow( /// (index) => DataRow(
/// color: MaterialStateProperty.resolveWith<Color>((Set<MaterialState> states) { /// color: MaterialStateProperty.resolveWith<Color?>((Set<MaterialState> states) {
/// // All rows will have the same selected color. /// // All rows will have the same selected color.
/// if (states.contains(MaterialState.selected)) /// if (states.contains(MaterialState.selected))
/// return Theme.of(context).colorScheme.primary.withOpacity(0.08); /// return Theme.of(context).colorScheme.primary.withOpacity(0.08);
@ -355,9 +355,9 @@ class DataCell {
/// }), /// }),
/// cells: [DataCell(Text('Row $index'))], /// cells: [DataCell(Text('Row $index'))],
/// selected: selected[index], /// selected: selected[index],
/// onSelectChanged: (bool value) { /// onSelectChanged: (bool? value) {
/// setState(() { /// setState(() {
/// selected[index] = value; /// selected[index] = value!;
/// }); /// });
/// }, /// },
/// ), /// ),

2
packages/flutter/lib/src/material/ink_well.dart
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@ -1171,7 +1171,7 @@ class _InkResponseState extends State<_InkResponseStateWidget>
/// ///
/// An example of this situation is as follows: /// An example of this situation is as follows:
/// ///
/// {@tool dartpad --template=stateful_widget_scaffold_center_no_null_safety} /// {@tool dartpad --template=stateful_widget_scaffold_center}
/// ///
/// Tap the container to cause it to grow. Then, tap it again and hold before /// Tap the container to cause it to grow. Then, tap it again and hold before
/// the widget reaches its maximum size to observe the clipped ink splash. /// the widget reaches its maximum size to observe the clipped ink splash.

11
packages/flutter/lib/src/material/input_decorator.dart
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@ -2389,7 +2389,7 @@ class _InputDecoratorState extends State<InputDecorator> with TickerProviderStat
/// to describe their decoration. (In fact, this class is merely the /// to describe their decoration. (In fact, this class is merely the
/// configuration of an [InputDecorator], which does all the heavy lifting.) /// configuration of an [InputDecorator], which does all the heavy lifting.)
/// ///
/// {@tool dartpad --template=stateless_widget_scaffold_no_null_safety} /// {@tool dartpad --template=stateless_widget_scaffold}
/// ///
/// This sample shows how to style a `TextField` using an `InputDecorator`. The /// This sample shows how to style a `TextField` using an `InputDecorator`. The
/// TextField displays a "send message" icon to the left of the input area, /// TextField displays a "send message" icon to the left of the input area,
@ -2414,7 +2414,7 @@ class _InputDecoratorState extends State<InputDecorator> with TickerProviderStat
/// ``` /// ```
/// {@end-tool} /// {@end-tool}
/// ///
/// {@tool dartpad --template=stateless_widget_scaffold_no_null_safety} /// {@tool dartpad --template=stateless_widget_scaffold}
/// ///
/// This sample shows how to style a "collapsed" `TextField` using an /// This sample shows how to style a "collapsed" `TextField` using an
/// `InputDecorator`. The collapsed `TextField` surrounds the hint text and /// `InputDecorator`. The collapsed `TextField` surrounds the hint text and
@ -2434,7 +2434,7 @@ class _InputDecoratorState extends State<InputDecorator> with TickerProviderStat
/// ``` /// ```
/// {@end-tool} /// {@end-tool}
/// ///
/// {@tool dartpad --template=stateless_widget_scaffold_no_null_safety} /// {@tool dartpad --template=stateless_widget_scaffold}
/// ///
/// This sample shows how to create a `TextField` with hint text, a red border /// This sample shows how to create a `TextField` with hint text, a red border
/// on all sides, and an error message. To display a red border and error /// on all sides, and an error message. To display a red border and error
@ -2455,7 +2455,7 @@ class _InputDecoratorState extends State<InputDecorator> with TickerProviderStat
/// ``` /// ```
/// {@end-tool} /// {@end-tool}
/// ///
/// {@tool dartpad --template=stateless_widget_scaffold_no_null_safety} /// {@tool dartpad --template=stateless_widget_scaffold}
/// ///
/// This sample shows how to style a `TextField` with a round border and /// This sample shows how to style a `TextField` with a round border and
/// additional text before and after the input area. It displays "Prefix" before /// additional text before and after the input area. It displays "Prefix" before
@ -2836,7 +2836,8 @@ class InputDecoration {
/// setting the constraints' minimum height and width to a value lower than /// setting the constraints' minimum height and width to a value lower than
/// 48px. /// 48px.
/// ///
/// {@tool dartpad --template=stateless_widget_scaffold_no_null_safety} /// {@tool dartpad --template=stateless_widget_scaffold}
///
/// This example shows the differences between two `TextField` widgets when /// This example shows the differences between two `TextField` widgets when
/// [prefixIconConstraints] is set to the default value and when one is not. /// [prefixIconConstraints] is set to the default value and when one is not.
/// ///

43
packages/flutter/lib/src/material/radio_list_tile.dart
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@ -10,7 +10,6 @@ import 'theme.dart';
import 'theme_data.dart'; import 'theme_data.dart';
// Examples can assume: // Examples can assume:
// // @dart = 2.9
// void setState(VoidCallback fn) { } // void setState(VoidCallback fn) { }
/// A [ListTile] with a [Radio]. In other words, a radio button with a label. /// A [ListTile] with a [Radio]. In other words, a radio button with a label.
@ -41,7 +40,7 @@ import 'theme_data.dart';
/// To show the [RadioListTile] as disabled, pass null as the [onChanged] /// To show the [RadioListTile] as disabled, pass null as the [onChanged]
/// callback. /// callback.
/// ///
/// {@tool dartpad --template=stateful_widget_scaffold_no_null_safety} /// {@tool dartpad --template=stateful_widget_scaffold}
/// ///
/// ![RadioListTile sample](https://flutter.github.io/assets-for-api-docs/assets/material/radio_list_tile.png) /// ![RadioListTile sample](https://flutter.github.io/assets-for-api-docs/assets/material/radio_list_tile.png)
/// ///
@ -52,7 +51,7 @@ import 'theme_data.dart';
/// enum SingingCharacter { lafayette, jefferson } /// enum SingingCharacter { lafayette, jefferson }
/// ``` /// ```
/// ```dart /// ```dart
/// SingingCharacter _character = SingingCharacter.lafayette; /// SingingCharacter? _character = SingingCharacter.lafayette;
/// ///
/// @override /// @override
/// Widget build(BuildContext context) { /// Widget build(BuildContext context) {
@ -62,13 +61,13 @@ import 'theme_data.dart';
/// title: const Text('Lafayette'), /// title: const Text('Lafayette'),
/// value: SingingCharacter.lafayette, /// value: SingingCharacter.lafayette,
/// groupValue: _character, /// groupValue: _character,
/// onChanged: (SingingCharacter value) { setState(() { _character = value; }); }, /// onChanged: (SingingCharacter? value) { setState(() { _character = value; }); },
/// ), /// ),
/// RadioListTile<SingingCharacter>( /// RadioListTile<SingingCharacter>(
/// title: const Text('Thomas Jefferson'), /// title: const Text('Thomas Jefferson'),
/// value: SingingCharacter.jefferson, /// value: SingingCharacter.jefferson,
/// groupValue: _character, /// groupValue: _character,
/// onChanged: (SingingCharacter value) { setState(() { _character = value; }); }, /// onChanged: (SingingCharacter? value) { setState(() { _character = value; }); },
/// ), /// ),
/// ], /// ],
/// ); /// );
@ -93,7 +92,7 @@ import 'theme_data.dart';
/// into one. Therefore, it may be necessary to create a custom radio tile /// into one. Therefore, it may be necessary to create a custom radio tile
/// widget to accommodate similar use cases. /// widget to accommodate similar use cases.
/// ///
/// {@tool dartpad --template=stateful_widget_scaffold_no_null_safety} /// {@tool dartpad --template=stateful_widget_scaffold}
/// ///
/// ![Radio list tile semantics sample](https://flutter.github.io/assets-for-api-docs/assets/material/radio_list_tile_semantics.png) /// ![Radio list tile semantics sample](https://flutter.github.io/assets-for-api-docs/assets/material/radio_list_tile_semantics.png)
/// ///
@ -107,11 +106,11 @@ import 'theme_data.dart';
/// ```dart preamble /// ```dart preamble
/// class LinkedLabelRadio extends StatelessWidget { /// class LinkedLabelRadio extends StatelessWidget {
/// const LinkedLabelRadio({ /// const LinkedLabelRadio({
/// this.label, /// required this.label,
/// this.padding, /// required this.padding,
/// this.groupValue, /// required this.groupValue,
/// this.value, /// required this.value,
/// this.onChanged, /// required this.onChanged,
/// }); /// });
/// ///
/// final String label; /// final String label;
@ -129,7 +128,7 @@ import 'theme_data.dart';
/// Radio<bool>( /// Radio<bool>(
/// groupValue: groupValue, /// groupValue: groupValue,
/// value: value, /// value: value,
/// onChanged: (bool newValue) { /// onChanged: (bool? newValue) {
/// onChanged(newValue); /// onChanged(newValue);
/// } /// }
/// ), /// ),
@ -197,7 +196,7 @@ import 'theme_data.dart';
/// combining [Radio] with other widgets, such as [Text], [Padding] and /// combining [Radio] with other widgets, such as [Text], [Padding] and
/// [InkWell]. /// [InkWell].
/// ///
/// {@tool dartpad --template=stateful_widget_scaffold_no_null_safety} /// {@tool dartpad --template=stateful_widget_scaffold}
/// ///
/// ![Custom radio list tile sample](https://flutter.github.io/assets-for-api-docs/assets/material/radio_list_tile_custom.png) /// ![Custom radio list tile sample](https://flutter.github.io/assets-for-api-docs/assets/material/radio_list_tile_custom.png)
/// ///
@ -207,11 +206,11 @@ import 'theme_data.dart';
/// ```dart preamble /// ```dart preamble
/// class LabeledRadio extends StatelessWidget { /// class LabeledRadio extends StatelessWidget {
/// const LabeledRadio({ /// const LabeledRadio({
/// this.label, /// required this.label,
/// this.padding, /// required this.padding,
/// this.groupValue, /// required this.groupValue,
/// this.value, /// required this.value,
/// this.onChanged, /// required this.onChanged,
/// }); /// });
/// ///
/// final String label; /// final String label;
@ -234,7 +233,7 @@ import 'theme_data.dart';
/// Radio<bool>( /// Radio<bool>(
/// groupValue: groupValue, /// groupValue: groupValue,
/// value: value, /// value: value,
/// onChanged: (bool newValue) { /// onChanged: (bool? newValue) {
/// onChanged(newValue); /// onChanged(newValue);
/// }, /// },
/// ), /// ),
@ -387,12 +386,12 @@ class RadioListTile<T> extends StatelessWidget {
/// ///
/// The default is false. /// The default is false.
/// ///
/// {@tool dartpad --template=stateful_widget_scaffold_no_null_safety} /// {@tool dartpad --template=stateful_widget_scaffold}
/// This example shows how to enable deselecting a radio button by setting the /// This example shows how to enable deselecting a radio button by setting the
/// [toggleable] attribute. /// [toggleable] attribute.
/// ///
/// ```dart /// ```dart
/// int groupValue; /// int? groupValue;
/// static const List<String> selections = <String>[ /// static const List<String> selections = <String>[
/// 'Hercules Mulligan', /// 'Hercules Mulligan',
/// 'Eliza Hamilton', /// 'Eliza Hamilton',
@ -411,7 +410,7 @@ class RadioListTile<T> extends StatelessWidget {
/// groupValue: groupValue, /// groupValue: groupValue,
/// toggleable: true, /// toggleable: true,
/// title: Text(selections[index]), /// title: Text(selections[index]),
/// onChanged: (int value) { /// onChanged: (int? value) {
/// setState(() { /// setState(() {
/// groupValue = value; /// groupValue = value;
/// }); /// });

2
packages/flutter/lib/src/material/raised_button.dart
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@ -43,7 +43,7 @@ import 'theme_data.dart';
/// Raised buttons have a minimum size of 88.0 by 36.0 which can be overridden /// Raised buttons have a minimum size of 88.0 by 36.0 which can be overridden
/// with [ButtonTheme]. /// with [ButtonTheme].
/// ///
/// {@tool dartpad --template=stateless_widget_scaffold_no_null_safety} /// {@tool dartpad --template=stateless_widget_scaffold}
/// ///
/// This sample shows how to render a disabled RaisedButton, an enabled RaisedButton /// This sample shows how to render a disabled RaisedButton, an enabled RaisedButton
/// and lastly a RaisedButton with gradient background. /// and lastly a RaisedButton with gradient background.

4
packages/flutter/lib/src/material/snack_bar.dart
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@ -158,7 +158,7 @@ class _SnackBarActionState extends State<SnackBarAction> {
/// A SnackBar with an action will not time out when TalkBack or VoiceOver are /// A SnackBar with an action will not time out when TalkBack or VoiceOver are
/// enabled. This is controlled by [AccessibilityFeatures.accessibleNavigation]. /// enabled. This is controlled by [AccessibilityFeatures.accessibleNavigation].
/// ///
/// {@tool dartpad --template=stateless_widget_scaffold_center_no_null_safety} /// {@tool dartpad --template=stateless_widget_scaffold_center}
/// ///
/// Here is an example of a [SnackBar] with an [action] button implemented using /// Here is an example of a [SnackBar] with an [action] button implemented using
/// [SnackBarAction]. /// [SnackBarAction].
@ -185,7 +185,7 @@ class _SnackBarActionState extends State<SnackBarAction> {
/// ``` /// ```
/// {@end-tool} /// {@end-tool}
/// ///
/// {@tool dartpad --template=stateless_widget_scaffold_center_no_null_safety} /// {@tool dartpad --template=stateless_widget_scaffold_center}
/// ///
/// Here is an example of a customized [SnackBar]. It utilizes /// Here is an example of a customized [SnackBar]. It utilizes
/// [behavior], [shape], [padding], [width], and [duration] to customize the /// [behavior], [shape], [padding], [width], and [duration] to customize the