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Reland: Added ButtonStyle.foregroundBuilder and ButtonStyle.backgroundBuilder (#142762)

Browse source 
Reland https://github.com/flutter/flutter/pull/141818 with a fix for a special case: If only `background` is specified for `TextButton.styleFrom` or `OutlinedButton.styleFrom` it applies the button's disabled state, i.e. as if the same value had been specified for disabledBackgroundColor.

The change relative to #141818 is the indicated line below:
```dart
final MaterialStateProperty<Color?>? backgroundColorProp = switch ((backgroundColor, disabledBackgroundColor)) {
  (null, null) => null,
  (_, null) => MaterialStatePropertyAll<Color?>(backgroundColor), // ADDED THIS LINE
  (_, _) => _TextButtonDefaultColor(backgroundColor, disabledBackgroundColor),
};
  ```

This backwards incompatibility cropped up in an internal test, see internal Google issue b/323399158.
This commit is contained in:
Hans Muller 2024-02-01 17:48:17 -08:00 committed by GitHub
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commit c6f2cea65e
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1
dev/bots/check_code_samples.dart
View file

@ -374,7 +374,6 @@ final Set<String> _knownMissingTests = <String>{
'examples/api/test/material/checkbox/checkbox.1_test.dart',
'examples/api/test/material/checkbox/checkbox.0_test.dart',
'examples/api/test/material/navigation_rail/navigation_rail.extended_animation.0_test.dart',
'examples/api/test/material/text_button/text_button.0_test.dart',
'examples/api/test/rendering/growth_direction/growth_direction.0_test.dart',
'examples/api/test/rendering/sliver_grid/sliver_grid_delegate_with_fixed_cross_axis_count.0_test.dart',
'examples/api/test/rendering/sliver_grid/sliver_grid_delegate_with_fixed_cross_axis_count.1_test.dart',

483
examples/api/lib/material/text_button/text_button.0.dart
View file

@ -6,78 +6,461 @@ import 'package:flutter/material.dart';
/// Flutter code sample for [TextButton].
void main() => runApp(const TextButtonExampleApp());
void main() {
runApp(const TextButtonExampleApp());
}
class TextButtonExampleApp extends StatelessWidget {
const TextButtonExampleApp({super.key});
class TextButtonExampleApp extends StatefulWidget {
const TextButtonExampleApp({ super.key });
@override
State<TextButtonExampleApp> createState() => _TextButtonExampleAppState();
}
class _TextButtonExampleAppState extends State<TextButtonExampleApp> {
bool darkMode = false;
@override
Widget build(BuildContext context) {
return MaterialApp(
themeMode: darkMode ? ThemeMode.dark : ThemeMode.light,
theme: ThemeData(brightness: Brightness.light),
darkTheme: ThemeData(brightness: Brightness.dark),
home: Scaffold(
appBar: AppBar(title: const Text('TextButton Sample')),
body: const TextButtonExample(),
body: Padding(
padding: const EdgeInsets.all(16),
child: TextButtonExample(
darkMode: darkMode,
updateDarkMode: (bool value) {
setState(() { darkMode = value; });
},
),
),
),
);
}
}
class TextButtonExample extends StatelessWidget {
const TextButtonExample({super.key});
class TextButtonExample extends StatefulWidget {
const TextButtonExample({ super.key, required this.darkMode, required this.updateDarkMode });
final bool darkMode;
final ValueChanged<bool> updateDarkMode;
@override
State<TextButtonExample> createState() => _TextButtonExampleState();
}
class _TextButtonExampleState extends State<TextButtonExample> {
TextDirection textDirection = TextDirection.ltr;
ThemeMode themeMode = ThemeMode.light;
late final ScrollController scrollController;
static const Widget verticalSpacer = SizedBox(height: 16);
static const Widget horizontalSpacer = SizedBox(width: 32);
@override
void initState() {
scrollController = ScrollController();
super.initState();
}
@override
void dispose() {
scrollController.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Center(
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
TextButton(
style: TextButton.styleFrom(
textStyle: const TextStyle(fontSize: 20),
final ThemeData theme = Theme.of(context);
final ColorScheme colorScheme = theme.colorScheme;
// Adapt colors that are not part of the color scheme to
// the current dark/light mode. Used to define TextButton #7's
// gradients.
final (Color color1, Color color2, Color color3) = switch (colorScheme.brightness) {
Brightness.light => (Colors.blue.withOpacity(1.0), Colors.orange.withOpacity(1.0), Colors.yellow.withOpacity(1.0)),
Brightness.dark => (Colors.purple.withOpacity(1.0), Colors.cyan.withOpacity(1.0), Colors.yellow.withOpacity(1.0)),
};
// This gradient's appearance reflects the button's state.
// Always return a gradient decoration so that AnimatedContainer
// can interpolorate in between. Used by TextButton #7.
Decoration? statesToDecoration(Set<MaterialState> states) {
if (states.contains(MaterialState.pressed)) {
return BoxDecoration(
gradient: LinearGradient(colors: <Color>[color2, color2]), // solid fill
);
}
return BoxDecoration(
gradient: LinearGradient(
colors: switch (states.contains(MaterialState.hovered)) {
true => <Color>[color1, color2],
false => <Color>[color2, color1],
},
),
);
}
// To make this method a little easier to read, the buttons that
// appear in the two columns to the right of the demo switches
// Card are broken out below.
final List<Widget> columnOneButtons = <Widget>[
TextButton(
onPressed: () {},
child: const Text('Enabled'),
),
verticalSpacer,
const TextButton(
onPressed: null,
child: Text('Disabled'),
),
verticalSpacer,
TextButton.icon(
onPressed: () {},
icon: const Icon(Icons.access_alarm),
label: const Text('TextButton.icon #1'),
),
verticalSpacer,
// Override the foreground and background colors.
//
// In this example, and most of the ones that follow, we're using
// the TextButton.styleFrom() convenience method to create a ButtonStyle.
// The styleFrom method is a little easier because it creates
// ButtonStyle MaterialStateProperty parameters for you.
// In this case, Specifying foregroundColor overrides the text,
// icon and overlay (splash and highlight) colors a little differently
// depending on the button's state. BackgroundColor is just the background
// color for all states.
TextButton.icon(
style: TextButton.styleFrom(
foregroundColor: colorScheme.onError,
backgroundColor: colorScheme.error,
),
onPressed: () { },
icon: const Icon(Icons.access_alarm),
label: const Text('TextButton.icon #2'),
),
verticalSpacer,
// Override the button's shape and its border.
//
// In this case we've specified a shape that has border - the
// RoundedRectangleBorder's side parameter. If the styleFrom
// side parameter was also specified, or if the TextButtonTheme
// defined above included a side parameter, then that would
// override the RoundedRectangleBorder's side.
TextButton(
style: TextButton.styleFrom(
shape: RoundedRectangleBorder(
borderRadius: const BorderRadius.all(Radius.circular(8)),
side: BorderSide(
color: colorScheme.primary,
width: 5,
),
onPressed: null,
child: const Text('Disabled'),
),
const SizedBox(height: 30),
TextButton(
style: TextButton.styleFrom(
textStyle: const TextStyle(fontSize: 20),
),
onPressed: () {},
child: const Text('Enabled'),
),
const SizedBox(height: 30),
ClipRRect(
borderRadius: BorderRadius.circular(4),
child: Stack(
children: <Widget>[
Positioned.fill(
child: Container(
decoration: const BoxDecoration(
gradient: LinearGradient(
colors: <Color>[
Color(0xFF0D47A1),
Color(0xFF1976D2),
Color(0xFF42A5F5),
],
),
),
onPressed: () { },
child: const Text('TextButton #3'),
),
verticalSpacer,
// Override overlay: the ink splash and highlight colors.
//
// The styleFrom method turns the specified overlayColor
// into a value MaterialStyleProperty<Color> ButtonStyle.overlay
// value that uses opacities depending on the button's state.
// If the overlayColor was Colors.transparent, no splash
// or highlights would be shown.
TextButton(
style: TextButton.styleFrom(
overlayColor: Colors.yellow,
),
onPressed: () { },
child: const Text('TextButton #4'),
),
];
final List<Widget> columnTwoButtons = <Widget>[
// Override the foregroundBuilder: apply a ShaderMask.
//
// Apply a ShaderMask to the button's child. This kind of thing
// can be applied to one button easily enough by just wrapping the
// button's child directly. However to affect all buttons in this
// way you can specify a similar foregroundBuilder in a TextButton
// theme or the MaterialApp theme's ThemeData.textButtonTheme.
TextButton(
style: TextButton.styleFrom(
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return ShaderMask(
shaderCallback: (Rect bounds) {
return LinearGradient(
begin: Alignment.bottomCenter,
end: Alignment.topCenter,
colors: <Color>[
colorScheme.primary,
colorScheme.onPrimary,
],
).createShader(bounds);
},
blendMode: BlendMode.srcATop,
child: child,
);
},
),
onPressed: () { },
child: const Text('TextButton #5'),
),
verticalSpacer,
// Override the foregroundBuilder: add an underline.
//
// Add a border around button's child. In this case the
// border only appears when the button is hovered or pressed
// (if it's pressed it's always hovered too). Not that this
// border is different than the one specified with the styleFrom
// side parameter (or the ButtonStyle.side property). The foregroundBuilder
// is applied to a widget that contains the child and has already
// included the button's padding. It is unaffected by the button's shape.
// The styleFrom side parameter controls the button's outermost border and it
// outlines the button's shape.
TextButton(
style: TextButton.styleFrom(
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return DecoratedBox(
decoration: BoxDecoration(
border: states.contains(MaterialState.hovered)
? Border(bottom: BorderSide(color: colorScheme.primary))
: const Border(), // essentially "no border"
),
child: child,
);
},
),
onPressed: () { },
child: const Text('TextButton #6'),
),
verticalSpacer,
// Override the backgroundBuilder to add a state specific gradient background
// and add an outline that only appears when the button is hovered or pressed.
//
// The gradient background decoration is computed by the statesToDecoration()
// method. The gradient flips horizontally when the button is hovered (watch
// closely). Because we want the outline to only appear when the button is hovered
// we can't use the styleFrom() side parameter, because that creates the same
// outline for all states. The ButtonStyle.copyWith() method is used to add
// a MaterialState<BorderSide?> property that does the right thing.
//
// The gradient background is translucent - all of the colors have opacity 0.5 -
// so the overlay's splash and highlight colors are visible even though they're
// drawn on the Material widget that's effectively behind the background. The
// border is also translucent, so if you look carefully, you'll see that the
// background - which is part of the button's Material but is drawn on top of the
// the background gradient - shows through the border.
TextButton(
onPressed: () {},
style: TextButton.styleFrom(
overlayColor: color2,
backgroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return AnimatedContainer(
duration: const Duration(milliseconds: 500),
decoration: statesToDecoration(states),
child: child,
);
},
).copyWith(
side: MaterialStateProperty.resolveWith<BorderSide?>((Set<MaterialState> states) {
if (states.contains(MaterialState.hovered)) {
return BorderSide(width: 3, color: color3);
}
return null; // defer to the default
}),
),
child: const Text('TextButton #7'),
),
verticalSpacer,
// Override the backgroundBuilder to add a grass image background.
//
// The image is clipped to the button's shape. We've included an Ink widget
// because the background image is opaque and would otherwise obscure the splash
// and highlight overlays that are painted on the button's Material widget
// by default. They're drawn on the Ink widget instead. The foreground color
// was overridden as well because white shows up a little better on the mottled
// green background.
TextButton(
onPressed: () {},
style: TextButton.styleFrom(
foregroundColor: Colors.white,
backgroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return Ink(
decoration: const BoxDecoration(
image: DecorationImage(
image: NetworkImage(grassUrl),
fit: BoxFit.cover,
),
),
child: child,
);
},
),
child: const Text('TextButton #8'),
),
verticalSpacer,
// Override the foregroundBuilder to specify images for the button's pressed
// hovered and inactive states.
//
// This is an example of completely changing the default appearance of a button
// by specifying images for each state and by turning off the overlays by
// overlayColor: Colors.transparent. AnimatedContainer takes care of the
// fade in and out segues between images.
//
// This foregroundBuilder function ignores its child parameter. Unfortunately
// TextButton's child parameter is required, so we still have
// to provide one.
TextButton(
onPressed: () {},
style: TextButton.styleFrom(
overlayColor: Colors.transparent,
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
String url = states.contains(MaterialState.hovered) ? smiley3Url : smiley1Url;
if (states.contains(MaterialState.pressed)) {
url = smiley2Url;
}
return AnimatedContainer(
width: 64,
height: 64,
duration: const Duration(milliseconds: 300),
curve: Curves.fastOutSlowIn,
decoration: BoxDecoration(
image: DecorationImage(
image: NetworkImage(url),
fit: BoxFit.contain,
),
),
);
},
),
child: const Text('This child is not used'),
),
];
return Row(
children: <Widget> [
// The dark/light and LTR/RTL switches. We use the updateDarkMode function
// provided by the parent TextButtonExampleApp to rebuild the MaterialApp
// in the appropriate dark/light ThemeMdoe. The directionality of the rest
// of the UI is controlled by the Directionality widget below, and the
// textDirection local state variable.
TextButtonExampleSwitches(
darkMode: widget.darkMode,
updateDarkMode: widget.updateDarkMode,
textDirection: textDirection,
updateRTL: (bool value) {
setState(() {
textDirection = value ? TextDirection.rtl : TextDirection.ltr;
});
},
),
horizontalSpacer,
// All of the button examples appear below. They're arranged in two columns.
Expanded(
child: Scrollbar(
controller: scrollController,
thumbVisibility: true,
child: SingleChildScrollView(
scrollDirection: Axis.horizontal,
controller: scrollController,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Directionality(
textDirection: textDirection,
child: Column(
children: columnOneButtons,
),
),
),
TextButton(
style: TextButton.styleFrom(
foregroundColor: Colors.white,
padding: const EdgeInsets.all(16.0),
textStyle: const TextStyle(fontSize: 20),
horizontalSpacer,
Directionality(
textDirection: textDirection,
child: Column(
children: columnTwoButtons
),
),
onPressed: () {},
child: const Text('Gradient'),
),
],
horizontalSpacer,
],
),
),
),
],
),
],
);
}
}
class TextButtonExampleSwitches extends StatelessWidget {
const TextButtonExampleSwitches({
super.key,
required this.darkMode,
required this.updateDarkMode,
required this.textDirection,
required this.updateRTL
});
final bool darkMode;
final ValueChanged<bool> updateDarkMode;
final TextDirection textDirection;
final ValueChanged<bool> updateRTL;
@override
Widget build(BuildContext context) {
return Card(
child: Padding(
padding: const EdgeInsets.all(16),
child: IntrinsicWidth(
child: Column(
children: <Widget>[
Row(
children: <Widget>[
const Expanded(child: Text('Dark Mode')),
const SizedBox(width: 4),
Switch(
value: darkMode,
onChanged: updateDarkMode,
),
],
),
const SizedBox(height: 16),
Row(
children: <Widget>[
const Expanded(child: Text('RTL Text')),
const SizedBox(width: 4),
Switch(
value: textDirection == TextDirection.rtl,
onChanged: updateRTL,
),
],
),
],
),
),
),
);
}
}
const String grassUrl = 'https://flutter.github.io/assets-for-api-docs/assets/material/text_button_grass.jpeg';
const String smiley1Url = 'https://flutter.github.io/assets-for-api-docs/assets/material/text_button_smiley1.png';
const String smiley2Url = 'https://flutter.github.io/assets-for-api-docs/assets/material/text_button_smiley2.png';
const String smiley3Url = 'https://flutter.github.io/assets-for-api-docs/assets/material/text_button_smiley3.png';

66
examples/api/test/material/text_button/text_button.0_test.dart Normal file
View file

@ -0,0 +1,66 @@
// 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.
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter_api_samples/material/text_button/text_button.0.dart' as example;
import 'package:flutter_test/flutter_test.dart';
void main() {
// The app being tested loads images via HTTP which the test
// framework defeats by default.
setUpAll(() {
HttpOverrides.global = null;
});
testWidgets('TextButtonExample smoke test', (WidgetTester tester) async {
await tester.pumpWidget(const example.TextButtonExampleApp());
await tester.pumpAndSettle();
await tester.tap(find.widgetWithText(TextButton, 'Enabled'));
await tester.pumpAndSettle();
await tester.tap(find.widgetWithText(TextButton, 'Disabled'));
await tester.pumpAndSettle();
// TextButton.icon buttons are _TextButtonWithIcons rather than TextButtons.
// For the purposes of this test, just tapping in the right place is OK.
await tester.tap(find.text('TextButton.icon #1'));
await tester.pumpAndSettle();
await tester.tap(find.text('TextButton.icon #2'));
await tester.pumpAndSettle();
await tester.tap(find.widgetWithText(TextButton, 'TextButton #3'));
await tester.pumpAndSettle();
await tester.tap(find.widgetWithText(TextButton, 'TextButton #4'));
await tester.pumpAndSettle();
await tester.tap(find.widgetWithText(TextButton, 'TextButton #5'));
await tester.pumpAndSettle();
await tester.tap(find.widgetWithText(TextButton, 'TextButton #6'));
await tester.pumpAndSettle();
await tester.tap(find.widgetWithText(TextButton, 'TextButton #7'));
await tester.pumpAndSettle();
await tester.tap(find.widgetWithText(TextButton, 'TextButton #8'));
await tester.pumpAndSettle();
await tester.tap(find.byType(TextButton).last); // Smiley image button
await tester.pumpAndSettle();
await tester.tap(find.byType(Switch).at(0)); // Dark Mode Switch
await tester.pumpAndSettle();
await tester.tap(find.byType(Switch).at(1)); // RTL Text Switch
await tester.pumpAndSettle();
});
}

60
packages/flutter/lib/src/material/button_style.dart
View file

@ -16,6 +16,12 @@ import 'theme_data.dart';
// late BuildContext context;
// typedef MyAppHome = Placeholder;
/// The type for [ButtonStyle.backgroundBuilder] and [ButtonStyle.foregroundBuilder].
///
/// The [states] parameter is the button's current pressed/hovered/etc state. The [child] is
/// typically a descendant of the returned widget.
typedef ButtonLayerBuilder = Widget Function(BuildContext context, Set<MaterialState> states, Widget? child);
/// The visual properties that most buttons have in common.
///
/// Buttons and their themes have a ButtonStyle property which defines the visual
@ -162,6 +168,8 @@ class ButtonStyle with Diagnosticable {
this.enableFeedback,
this.alignment,
this.splashFactory,
this.backgroundBuilder,
this.foregroundBuilder,
});
/// The style for a button's [Text] widget descendants.
@ -315,6 +323,42 @@ class ButtonStyle with Diagnosticable {
/// ```
final InteractiveInkFeatureFactory? splashFactory;
/// Creates a widget that becomes the child of the button's [Material]
/// and whose child is the rest of the button, including the button's
/// `child` parameter.
///
/// The widget created by [backgroundBuilder] is constrained to be
/// the same size as the overall button and will appear behind the
/// button's child. The widget created by [foregroundBuilder] is
/// constrained to be the same size as the button's child, i.e. it's
/// inset by [ButtonStyle.padding] and aligned by the button's
/// [ButtonStyle.alignment].
///
/// By default the returned widget is clipped to the Material's [ButtonStyle.shape].
///
/// See also:
///
/// * [foregroundBuilder], to create a widget that's as big as the button's
/// child and is layered behind the child.
/// * [ButtonStyleButton.clipBehavior], for more information about
/// configuring clipping.
final ButtonLayerBuilder? backgroundBuilder;
/// Creates a Widget that contains the button's child parameter which is used
/// instead of the button's child.
///
/// The returned widget is clipped by the button's
/// [ButtonStyle.shape], inset by the button's [ButtonStyle.padding]
/// and aligned by the button's [ButtonStyle.alignment].
///
/// See also:
///
/// * [backgroundBuilder], to create a widget that's as big as the button and
/// is layered behind the button's child.
/// * [ButtonStyleButton.clipBehavior], for more information about
/// configuring clipping.
final ButtonLayerBuilder? foregroundBuilder;
/// Returns a copy of this ButtonStyle with the given fields replaced with
/// the new values.
ButtonStyle copyWith({
@ -340,6 +384,8 @@ class ButtonStyle with Diagnosticable {
bool? enableFeedback,
AlignmentGeometry? alignment,
InteractiveInkFeatureFactory? splashFactory,
ButtonLayerBuilder? backgroundBuilder,
ButtonLayerBuilder? foregroundBuilder,
}) {
return ButtonStyle(
textStyle: textStyle ?? this.textStyle,
@ -364,6 +410,8 @@ class ButtonStyle with Diagnosticable {
enableFeedback: enableFeedback ?? this.enableFeedback,
alignment: alignment ?? this.alignment,
splashFactory: splashFactory ?? this.splashFactory,
backgroundBuilder: backgroundBuilder ?? this.backgroundBuilder,
foregroundBuilder: foregroundBuilder ?? this.foregroundBuilder,
);
}
@ -399,6 +447,8 @@ class ButtonStyle with Diagnosticable {
enableFeedback: enableFeedback ?? style.enableFeedback,
alignment: alignment ?? style.alignment,
splashFactory: splashFactory ?? style.splashFactory,
backgroundBuilder: backgroundBuilder ?? style.backgroundBuilder,
foregroundBuilder: foregroundBuilder ?? style.foregroundBuilder,
);
}
@ -427,6 +477,8 @@ class ButtonStyle with Diagnosticable {
enableFeedback,
alignment,
splashFactory,
backgroundBuilder,
foregroundBuilder,
];
return Object.hashAll(values);
}
@ -461,7 +513,9 @@ class ButtonStyle with Diagnosticable {
&& other.animationDuration == animationDuration
&& other.enableFeedback == enableFeedback
&& other.alignment == alignment
&& other.splashFactory == splashFactory;
&& other.splashFactory == splashFactory
&& other.backgroundBuilder == backgroundBuilder
&& other.foregroundBuilder == foregroundBuilder;
}
@override
@ -488,6 +542,8 @@ class ButtonStyle with Diagnosticable {
properties.add(DiagnosticsProperty<Duration>('animationDuration', animationDuration, defaultValue: null));
properties.add(DiagnosticsProperty<bool>('enableFeedback', enableFeedback, defaultValue: null));
properties.add(DiagnosticsProperty<AlignmentGeometry>('alignment', alignment, defaultValue: null));
properties.add(DiagnosticsProperty<ButtonLayerBuilder>('backgroundBuilder', backgroundBuilder, defaultValue: null));
properties.add(DiagnosticsProperty<ButtonLayerBuilder>('foregroundBuilder', foregroundBuilder, defaultValue: null));
}
/// Linearly interpolate between two [ButtonStyle]s.
@ -518,6 +574,8 @@ class ButtonStyle with Diagnosticable {
enableFeedback: t < 0.5 ? a?.enableFeedback : b?.enableFeedback,
alignment: AlignmentGeometry.lerp(a?.alignment, b?.alignment, t),
splashFactory: t < 0.5 ? a?.splashFactory : b?.splashFactory,
backgroundBuilder: t < 0.5 ? a?.backgroundBuilder : b?.backgroundBuilder,
foregroundBuilder: t < 0.5 ? a?.foregroundBuilder : b?.foregroundBuilder,
);
}

38
packages/flutter/lib/src/material/button_style_button.dart
View file

@ -89,8 +89,10 @@ abstract class ButtonStyleButton extends StatefulWidget {
/// {@macro flutter.material.Material.clipBehavior}
///
/// Defaults to [Clip.none].
final Clip clipBehavior;
/// Defaults to [Clip.none] unless [ButtonStyle.backgroundBuilder] or
/// [ButtonStyle.foregroundBuilder] is specified. In those
/// cases the default is [Clip.antiAlias].
final Clip? clipBehavior;
/// {@macro flutter.widgets.Focus.focusNode}
final FocusNode? focusNode;
@ -318,6 +320,11 @@ class _ButtonStyleState extends State<ButtonStyleButton> with TickerProviderStat
final AlignmentGeometry? resolvedAlignment = effectiveValue((ButtonStyle? style) => style?.alignment);
final Offset densityAdjustment = resolvedVisualDensity!.baseSizeAdjustment;
final InteractiveInkFeatureFactory? resolvedSplashFactory = effectiveValue((ButtonStyle? style) => style?.splashFactory);
final ButtonLayerBuilder? resolvedBackgroundBuilder = effectiveValue((ButtonStyle? style) => style?.backgroundBuilder);
final ButtonLayerBuilder? resolvedForegroundBuilder = effectiveValue((ButtonStyle? style) => style?.foregroundBuilder);
final Clip effectiveClipBehavior = widget.clipBehavior
?? ((resolvedBackgroundBuilder ?? resolvedForegroundBuilder) != null ? Clip.antiAlias : Clip.none);
BoxConstraints effectiveConstraints = resolvedVisualDensity.effectiveConstraints(
BoxConstraints(
@ -384,6 +391,21 @@ class _ButtonStyleState extends State<ButtonStyleButton> with TickerProviderStat
elevation = resolvedElevation;
backgroundColor = resolvedBackgroundColor;
Widget effectiveChild = Padding(
padding: padding,
child: Align(
alignment: resolvedAlignment!,
widthFactor: 1.0,
heightFactor: 1.0,
child: resolvedForegroundBuilder != null
? resolvedForegroundBuilder(context, statesController.value, widget.child)
: widget.child,
),
);
if (resolvedBackgroundBuilder != null) {
effectiveChild = resolvedBackgroundBuilder(context, statesController.value, effectiveChild);
}
final Widget result = ConstrainedBox(
constraints: effectiveConstraints,
child: Material(
@ -395,7 +417,7 @@ class _ButtonStyleState extends State<ButtonStyleButton> with TickerProviderStat
surfaceTintColor: resolvedSurfaceTintColor,
type: resolvedBackgroundColor == null ? MaterialType.transparency : MaterialType.button,
animationDuration: resolvedAnimationDuration,
clipBehavior: widget.clipBehavior,
clipBehavior: effectiveClipBehavior,
child: InkWell(
onTap: widget.onPressed,
onLongPress: widget.onLongPress,
@ -413,15 +435,7 @@ class _ButtonStyleState extends State<ButtonStyleButton> with TickerProviderStat
statesController: statesController,
child: IconTheme.merge(
data: IconThemeData(color: resolvedIconColor ?? resolvedForegroundColor, size: resolvedIconSize),
child: Padding(
padding: padding,
child: Align(
alignment: resolvedAlignment!,
widthFactor: 1.0,
heightFactor: 1.0,
child: widget.child,
),
),
child: effectiveChild,
),
),
),

70
packages/flutter/lib/src/material/elevated_button.dart
View file

@ -10,6 +10,7 @@ import 'package:flutter/widgets.dart';
import 'button_style.dart';
import 'button_style_button.dart';
import 'color_scheme.dart';
import 'colors.dart';
import 'constants.dart';
import 'elevated_button_theme.dart';
import 'ink_ripple.dart';
@ -70,7 +71,7 @@ class ElevatedButton extends ButtonStyleButton {
super.style,
super.focusNode,
super.autofocus = false,
super.clipBehavior = Clip.none,
super.clipBehavior,
super.statesController,
required super.child,
});
@ -132,19 +133,26 @@ class ElevatedButton extends ButtonStyleButton {
///
/// The [foregroundColor] and [disabledForegroundColor] colors are used
/// to create a [MaterialStateProperty] [ButtonStyle.foregroundColor], and
/// a derived [ButtonStyle.overlayColor].
/// a derived [ButtonStyle.overlayColor] if [overlayColor] isn't specified.
///
/// If [overlayColor] is specified and its value is [Colors.transparent]
/// then the pressed/focused/hovered highlights are effectively defeated.
/// Otherwise a [MaterialStateProperty] with the same opacities as the
/// default is created.
///
/// The [backgroundColor] and [disabledBackgroundColor] colors are
/// used to create a [MaterialStateProperty] [ButtonStyle.backgroundColor].
///
/// Similarly, the [enabledMouseCursor] and [disabledMouseCursor]
/// parameters are used to construct [ButtonStyle.mouseCursor] and
/// [iconColor], [disabledIconColor] are used to construct
/// [ButtonStyle.iconColor].
///
/// The button's elevations are defined relative to the [elevation]
/// parameter. The disabled elevation is the same as the parameter
/// value, [elevation] + 2 is used when the button is hovered
/// or focused, and elevation + 6 is used when the button is pressed.
///
/// Similarly, the [enabledMouseCursor] and [disabledMouseCursor]
/// parameters are used to construct [ButtonStyle].mouseCursor.
///
/// All of the other parameters are either used directly or used to
/// create a [MaterialStateProperty] with a single value for all
/// states.
@ -186,6 +194,9 @@ class ElevatedButton extends ButtonStyleButton {
Color? disabledBackgroundColor,
Color? shadowColor,
Color? surfaceTintColor,
Color? iconColor,
Color? disabledIconColor,
Color? overlayColor,
double? elevation,
TextStyle? textStyle,
EdgeInsetsGeometry? padding,
@ -202,32 +213,40 @@ class ElevatedButton extends ButtonStyleButton {
bool? enableFeedback,
AlignmentGeometry? alignment,
InteractiveInkFeatureFactory? splashFactory,
ButtonLayerBuilder? backgroundBuilder,
ButtonLayerBuilder? foregroundBuilder,
}) {
final Color? background = backgroundColor;
final Color? disabledBackground = disabledBackgroundColor;
final MaterialStateProperty<Color?>? backgroundColorProp = (background == null && disabledBackground == null)
? null
: _ElevatedButtonDefaultColor(background, disabledBackground);
final Color? foreground = foregroundColor;
final Color? disabledForeground = disabledForegroundColor;
final MaterialStateProperty<Color?>? foregroundColorProp = (foreground == null && disabledForeground == null)
? null
: _ElevatedButtonDefaultColor(foreground, disabledForeground);
final MaterialStateProperty<Color?>? overlayColor = (foreground == null)
? null
: _ElevatedButtonDefaultOverlay(foreground);
final MaterialStateProperty<double>? elevationValue = (elevation == null)
? null
: _ElevatedButtonDefaultElevation(elevation);
final MaterialStateProperty<Color?>? foregroundColorProp = switch ((foregroundColor, disabledForegroundColor)) {
(null, null) => null,
(_, _) => _ElevatedButtonDefaultColor(foregroundColor, disabledForegroundColor),
};
final MaterialStateProperty<Color?>? backgroundColorProp = switch ((backgroundColor, disabledBackgroundColor)) {
(null, null) => null,
(_, _) => _ElevatedButtonDefaultColor(backgroundColor, disabledBackgroundColor),
};
final MaterialStateProperty<Color?>? iconColorProp = switch ((iconColor, disabledIconColor)) {
(null, null) => null,
(_, _) => _ElevatedButtonDefaultColor(iconColor, disabledIconColor),
};
final MaterialStateProperty<Color?>? overlayColorProp = switch ((foregroundColor, overlayColor)) {
(null, null) => null,
(_, final Color overlayColor) when overlayColor.value == 0 => const MaterialStatePropertyAll<Color?>(Colors.transparent),
(_, _) => _ElevatedButtonDefaultOverlay((overlayColor ?? foregroundColor)!),
};
final MaterialStateProperty<double>? elevationValue = switch (elevation) {
null => null,
_ => _ElevatedButtonDefaultElevation(elevation),
};
final MaterialStateProperty<MouseCursor?> mouseCursor = _ElevatedButtonDefaultMouseCursor(enabledMouseCursor, disabledMouseCursor);
return ButtonStyle(
textStyle: MaterialStatePropertyAll<TextStyle?>(textStyle),
backgroundColor: backgroundColorProp,
foregroundColor: foregroundColorProp,
overlayColor: overlayColor,
overlayColor: overlayColorProp,
shadowColor: ButtonStyleButton.allOrNull<Color>(shadowColor),
surfaceTintColor: ButtonStyleButton.allOrNull<Color>(surfaceTintColor),
iconColor: iconColorProp,
elevation: elevationValue,
padding: ButtonStyleButton.allOrNull<EdgeInsetsGeometry>(padding),
minimumSize: ButtonStyleButton.allOrNull<Size>(minimumSize),
@ -242,6 +261,8 @@ class ElevatedButton extends ButtonStyleButton {
enableFeedback: enableFeedback,
alignment: alignment,
splashFactory: splashFactory,
backgroundBuilder: backgroundBuilder,
foregroundBuilder: foregroundBuilder,
);
}
@ -283,7 +304,7 @@ class ElevatedButton extends ButtonStyleButton {
/// * others - Theme.colorScheme.onPrimary
/// * `overlayColor`
/// * hovered - Theme.colorScheme.onPrimary(0.08)
/// * focused or pressed - Theme.colorScheme.onPrimary(0.24)
/// * focused or pressed - Theme.colorScheme.onPrimary(0.12)
/// * `shadowColor` - Theme.shadowColor
/// * `elevation`
/// * disabled - 0
@ -507,13 +528,12 @@ class _ElevatedButtonWithIcon extends ElevatedButton {
super.style,
super.focusNode,
bool? autofocus,
Clip? clipBehavior,
super.clipBehavior,
super.statesController,
required Widget icon,
required Widget label,
}) : super(
autofocus: autofocus ?? false,
clipBehavior: clipBehavior ?? Clip.none,
child: _ElevatedButtonWithIconChild(icon: icon, label: label, buttonStyle: style),
);

68
packages/flutter/lib/src/material/filled_button.dart
View file

@ -202,19 +202,23 @@ class FilledButton extends ButtonStyleButton {
/// A static convenience method that constructs a filled button
/// [ButtonStyle] given simple values.
///
/// The [foregroundColor], and [disabledForegroundColor] colors are used to create a
/// [MaterialStateProperty] [ButtonStyle.foregroundColor] value. The
/// [backgroundColor] and [disabledBackgroundColor] are used to create a
/// [MaterialStateProperty] [ButtonStyle.backgroundColor] value.
/// The [foregroundColor] and [disabledForegroundColor] colors are used
/// to create a [MaterialStateProperty] [ButtonStyle.foregroundColor], and
/// a derived [ButtonStyle.overlayColor] if [overlayColor] isn't specified.
///
/// If [overlayColor] is specified and its value is [Colors.transparent]
/// then the pressed/focused/hovered highlights are effectively defeated.
/// Otherwise a [MaterialStateProperty] with the same opacities as the
/// default is created.
///
/// Similarly, the [enabledMouseCursor] and [disabledMouseCursor]
/// parameters are used to construct [ButtonStyle.mouseCursor].
///
/// The button's elevations are defined relative to the [elevation]
/// parameter. The disabled elevation is the same as the parameter
/// value, [elevation] + 2 is used when the button is hovered
/// or focused, and elevation + 6 is used when the button is pressed.
///
/// Similarly, the [enabledMouseCursor] and [disabledMouseCursor]
/// parameters are used to construct [ButtonStyle.mouseCursor].
///
/// All of the other parameters are either used directly or used to
/// create a [MaterialStateProperty] with a single value for all
/// states.
@ -250,6 +254,9 @@ class FilledButton extends ButtonStyleButton {
Color? disabledBackgroundColor,
Color? shadowColor,
Color? surfaceTintColor,
Color? iconColor,
Color? disabledIconColor,
Color? overlayColor,
double? elevation,
TextStyle? textStyle,
EdgeInsetsGeometry? padding,
@ -266,29 +273,36 @@ class FilledButton extends ButtonStyleButton {
bool? enableFeedback,
AlignmentGeometry? alignment,
InteractiveInkFeatureFactory? splashFactory,
ButtonLayerBuilder? backgroundBuilder,
ButtonLayerBuilder? foregroundBuilder,
}) {
final MaterialStateProperty<Color?>? backgroundColorProp =
(backgroundColor == null && disabledBackgroundColor == null)
? null
: _FilledButtonDefaultColor(backgroundColor, disabledBackgroundColor);
final Color? foreground = foregroundColor;
final Color? disabledForeground = disabledForegroundColor;
final MaterialStateProperty<Color?>? foregroundColorProp =
(foreground == null && disabledForeground == null)
? null
: _FilledButtonDefaultColor(foreground, disabledForeground);
final MaterialStateProperty<Color?>? overlayColor = (foreground == null)
? null
: _FilledButtonDefaultOverlay(foreground);
final MaterialStateProperty<Color?>? foregroundColorProp = switch ((foregroundColor, disabledForegroundColor)) {
(null, null) => null,
(_, _) => _FilledButtonDefaultColor(foregroundColor, disabledForegroundColor),
};
final MaterialStateProperty<Color?>? backgroundColorProp = switch ((backgroundColor, disabledBackgroundColor)) {
(null, null) => null,
(_, _) => _FilledButtonDefaultColor(backgroundColor, disabledBackgroundColor),
};
final MaterialStateProperty<Color?>? iconColorProp = switch ((iconColor, disabledIconColor)) {
(null, null) => null,
(_, _) => _FilledButtonDefaultColor(iconColor, disabledIconColor),
};
final MaterialStateProperty<Color?>? overlayColorProp = switch ((foregroundColor, overlayColor)) {
(null, null) => null,
(_, final Color overlayColor) when overlayColor.value == 0 => const MaterialStatePropertyAll<Color?>(Colors.transparent),
(_, _) => _FilledButtonDefaultOverlay((overlayColor ?? foregroundColor)!),
};
final MaterialStateProperty<MouseCursor?> mouseCursor = _FilledButtonDefaultMouseCursor(enabledMouseCursor, disabledMouseCursor);
return ButtonStyle(
textStyle: MaterialStatePropertyAll<TextStyle?>(textStyle),
backgroundColor: backgroundColorProp,
foregroundColor: foregroundColorProp,
overlayColor: overlayColor,
overlayColor: overlayColorProp,
shadowColor: ButtonStyleButton.allOrNull<Color>(shadowColor),
surfaceTintColor: ButtonStyleButton.allOrNull<Color>(surfaceTintColor),
iconColor: iconColorProp,
elevation: ButtonStyleButton.allOrNull(elevation),
padding: ButtonStyleButton.allOrNull<EdgeInsetsGeometry>(padding),
minimumSize: ButtonStyleButton.allOrNull<Size>(minimumSize),
@ -303,6 +317,8 @@ class FilledButton extends ButtonStyleButton {
enableFeedback: enableFeedback,
alignment: alignment,
splashFactory: splashFactory,
backgroundBuilder: backgroundBuilder,
foregroundBuilder: foregroundBuilder,
);
}
@ -515,14 +531,13 @@ class _FilledButtonWithIcon extends FilledButton {
super.style,
super.focusNode,
bool? autofocus,
Clip? clipBehavior,
super.clipBehavior,
super.statesController,
required Widget icon,
required Widget label,
}) : super(
autofocus: autofocus ?? false,
clipBehavior: clipBehavior ?? Clip.none,
child: _FilledButtonWithIconChild(icon: icon, label: label, buttonStyle: style),
child: _FilledButtonWithIconChild(icon: icon, label: label, buttonStyle: style)
);
_FilledButtonWithIcon.tonal({
@ -534,14 +549,13 @@ class _FilledButtonWithIcon extends FilledButton {
super.style,
super.focusNode,
bool? autofocus,
Clip? clipBehavior,
super.clipBehavior,
super.statesController,
required Widget icon,
required Widget label,
}) : super.tonal(
autofocus: autofocus ?? false,
clipBehavior: clipBehavior ?? Clip.none,
child: _FilledButtonWithIconChild(icon: icon, label: label, buttonStyle: style),
child: _FilledButtonWithIconChild(icon: icon, label: label, buttonStyle: style)
);
@override

10
packages/flutter/lib/src/material/material_state.dart
View file

@ -168,6 +168,9 @@ abstract class MaterialStateColor extends Color implements MaterialStateProperty
/// specified state.
@override
Color resolve(Set<MaterialState> states);
/// A constant whose value is [Colors.transparent] for all states.
static const MaterialStateColor transparent = _MaterialStateColorTransparent();
}
/// A [MaterialStateColor] created from a [MaterialPropertyResolver<Color>]
@ -189,6 +192,13 @@ class _MaterialStateColor extends MaterialStateColor {
Color resolve(Set<MaterialState> states) => _resolve(states);
}
class _MaterialStateColorTransparent extends MaterialStateColor {
const _MaterialStateColorTransparent() : super(0x00000000);
@override
Color resolve(Set<MaterialState> states) => const Color(0x00000000);
}
/// Defines a [MouseCursor] whose value depends on a set of [MaterialState]s which
/// represent the interactive state of a component.
///

64
packages/flutter/lib/src/material/outlined_button.dart
View file

@ -75,7 +75,7 @@ class OutlinedButton extends ButtonStyleButton {
super.style,
super.focusNode,
super.autofocus = false,
super.clipBehavior = Clip.none,
super.clipBehavior,
super.statesController,
required super.child,
});
@ -129,16 +129,22 @@ class OutlinedButton extends ButtonStyleButton {
/// A static convenience method that constructs an outlined button
/// [ButtonStyle] given simple values.
///
///
/// The [foregroundColor] and [disabledForegroundColor] colors are used
/// to create a [MaterialStateProperty] [ButtonStyle.foregroundColor], and
/// a derived [ButtonStyle.overlayColor].
/// a derived [ButtonStyle.overlayColor] if [overlayColor] isn't specified.
///
/// The [backgroundColor] and [disabledBackgroundColor] colors are
/// used to create a [MaterialStateProperty] [ButtonStyle.backgroundColor].
///
/// Similarly, the [enabledMouseCursor] and [disabledMouseCursor]
/// parameters are used to construct [ButtonStyle.mouseCursor].
/// parameters are used to construct [ButtonStyle.mouseCursor] and
/// [iconColor], [disabledIconColor] are used to construct
/// [ButtonStyle.iconColor].
///
/// If [overlayColor] is specified and its value is [Colors.transparent]
/// then the pressed/focused/hovered highlights are effectively defeated.
/// Otherwise a [MaterialStateProperty] with the same opacities as the
/// default is created.
///
/// All of the other parameters are either used directly or used to
/// create a [MaterialStateProperty] with a single value for all
@ -169,6 +175,9 @@ class OutlinedButton extends ButtonStyleButton {
Color? disabledBackgroundColor,
Color? shadowColor,
Color? surfaceTintColor,
Color? iconColor,
Color? disabledIconColor,
Color? overlayColor,
double? elevation,
TextStyle? textStyle,
EdgeInsetsGeometry? padding,
@ -185,29 +194,37 @@ class OutlinedButton extends ButtonStyleButton {
bool? enableFeedback,
AlignmentGeometry? alignment,
InteractiveInkFeatureFactory? splashFactory,
ButtonLayerBuilder? backgroundBuilder,
ButtonLayerBuilder? foregroundBuilder,
}) {
final Color? foreground = foregroundColor;
final Color? disabledForeground = disabledForegroundColor;
final MaterialStateProperty<Color?>? foregroundColorProp = (foreground == null && disabledForeground == null)
? null
: _OutlinedButtonDefaultColor(foreground, disabledForeground);
final MaterialStateProperty<Color?>? backgroundColorProp = (backgroundColor == null && disabledBackgroundColor == null)
? null
: disabledBackgroundColor == null
? ButtonStyleButton.allOrNull<Color?>(backgroundColor)
: _OutlinedButtonDefaultColor(backgroundColor, disabledBackgroundColor);
final MaterialStateProperty<Color?>? overlayColor = (foreground == null)
? null
: _OutlinedButtonDefaultOverlay(foreground);
final MaterialStateProperty<Color?>? foregroundColorProp = switch ((foregroundColor, disabledForegroundColor)) {
(null, null) => null,
(_, _) => _OutlinedButtonDefaultColor(foregroundColor, disabledForegroundColor),
};
final MaterialStateProperty<Color?>? backgroundColorProp = switch ((backgroundColor, disabledBackgroundColor)) {
(null, null) => null,
(_, null) => MaterialStatePropertyAll<Color?>(backgroundColor),
(_, _) => _OutlinedButtonDefaultColor(backgroundColor, disabledBackgroundColor),
};
final MaterialStateProperty<Color?>? iconColorProp = switch ((iconColor, disabledIconColor)) {
(null, null) => null,
(_, _) => _OutlinedButtonDefaultColor(iconColor, disabledIconColor),
};
final MaterialStateProperty<Color?>? overlayColorProp = switch ((foregroundColor, overlayColor)) {
(null, null) => null,
(_, final Color overlayColor) when overlayColor.value == 0 => const MaterialStatePropertyAll<Color?>(Colors.transparent),
(_, _) => _OutlinedButtonDefaultOverlay((overlayColor ?? foregroundColor)!),
};
final MaterialStateProperty<MouseCursor?> mouseCursor = _OutlinedButtonDefaultMouseCursor(enabledMouseCursor, disabledMouseCursor);
return ButtonStyle(
textStyle: ButtonStyleButton.allOrNull<TextStyle>(textStyle),
foregroundColor: foregroundColorProp,
backgroundColor: backgroundColorProp,
overlayColor: overlayColor,
overlayColor: overlayColorProp,
shadowColor: ButtonStyleButton.allOrNull<Color>(shadowColor),
surfaceTintColor: ButtonStyleButton.allOrNull<Color>(surfaceTintColor),
iconColor: iconColorProp,
elevation: ButtonStyleButton.allOrNull<double>(elevation),
padding: ButtonStyleButton.allOrNull<EdgeInsetsGeometry>(padding),
minimumSize: ButtonStyleButton.allOrNull<Size>(minimumSize),
@ -222,6 +239,8 @@ class OutlinedButton extends ButtonStyleButton {
enableFeedback: enableFeedback,
alignment: alignment,
splashFactory: splashFactory,
backgroundBuilder: backgroundBuilder,
foregroundBuilder: foregroundBuilder,
);
}
@ -256,7 +275,7 @@ class OutlinedButton extends ButtonStyleButton {
/// * disabled - Theme.colorScheme.onSurface(0.38)
/// * others - Theme.colorScheme.primary
/// * `overlayColor`
/// * hovered - Theme.colorScheme.primary(0.04)
/// * hovered - Theme.colorScheme.primary(0.08)
/// * focused or pressed - Theme.colorScheme.primary(0.12)
/// * `shadowColor` - Theme.shadowColor
/// * `elevation` - 0
@ -339,9 +358,7 @@ class OutlinedButton extends ButtonStyleButton {
padding: _scaledPadding(context),
minimumSize: const Size(64, 36),
maximumSize: Size.infinite,
side: BorderSide(
color: Theme.of(context).colorScheme.onSurface.withOpacity(0.12),
),
side: BorderSide(color: colorScheme.onSurface.withOpacity(0.12)),
shape: const RoundedRectangleBorder(borderRadius: BorderRadius.all(Radius.circular(4))),
enabledMouseCursor: SystemMouseCursors.click,
disabledMouseCursor: SystemMouseCursors.basic,
@ -434,13 +451,12 @@ class _OutlinedButtonWithIcon extends OutlinedButton {
super.style,
super.focusNode,
bool? autofocus,
Clip? clipBehavior,
super.clipBehavior,
super.statesController,
required Widget icon,
required Widget label,
}) : super(
autofocus: autofocus ?? false,
clipBehavior: clipBehavior ?? Clip.none,
child: _OutlinedButtonWithIconChild(icon: icon, label: label, buttonStyle: style),
);

88
packages/flutter/lib/src/material/text_button.dart
View file

@ -50,8 +50,9 @@ import 'theme_data.dart';
/// button will be disabled, it will not react to touch.
///
/// {@tool dartpad}
/// This sample shows how to render a disabled TextButton, an enabled TextButton
/// and lastly a TextButton with gradient background.
/// This sample shows various ways to configure TextButtons, from the
/// simplest default appearance to versions that don't resemble
/// Material Design at all.
///
/// ** See code in examples/api/lib/material/text_button/text_button.0.dart **
/// {@end-tool}
@ -82,7 +83,7 @@ class TextButton extends ButtonStyleButton {
super.style,
super.focusNode,
super.autofocus = false,
super.clipBehavior = Clip.none,
super.clipBehavior,
super.statesController,
super.isSemanticButton,
required Widget super.child,
@ -142,13 +143,20 @@ class TextButton extends ButtonStyleButton {
///
/// The [foregroundColor] and [disabledForegroundColor] colors are used
/// to create a [MaterialStateProperty] [ButtonStyle.foregroundColor], and
/// a derived [ButtonStyle.overlayColor].
/// a derived [ButtonStyle.overlayColor] if [overlayColor] isn't specified.
///
/// The [backgroundColor] and [disabledBackgroundColor] colors are
/// used to create a [MaterialStateProperty] [ButtonStyle.backgroundColor].
///
/// Similarly, the [enabledMouseCursor] and [disabledMouseCursor]
/// parameters are used to construct [ButtonStyle.mouseCursor].
/// parameters are used to construct [ButtonStyle.mouseCursor] and
/// [iconColor], [disabledIconColor] are used to construct
/// [ButtonStyle.iconColor].
///
/// If [overlayColor] is specified and its value is [Colors.transparent]
/// then the pressed/focused/hovered highlights are effectively defeated.
/// Otherwise a [MaterialStateProperty] with the same opacities as the
/// default is created.
///
/// All of the other parameters are either used directly or used to
/// create a [MaterialStateProperty] with a single value for all
@ -180,6 +188,7 @@ class TextButton extends ButtonStyleButton {
Color? surfaceTintColor,
Color? iconColor,
Color? disabledIconColor,
Color? overlayColor,
double? elevation,
TextStyle? textStyle,
EdgeInsetsGeometry? padding,
@ -196,32 +205,35 @@ class TextButton extends ButtonStyleButton {
bool? enableFeedback,
AlignmentGeometry? alignment,
InteractiveInkFeatureFactory? splashFactory,
ButtonLayerBuilder? backgroundBuilder,
ButtonLayerBuilder? foregroundBuilder,
}) {
final Color? foreground = foregroundColor;
final Color? disabledForeground = disabledForegroundColor;
final MaterialStateProperty<Color?>? foregroundColorProp = (foreground == null && disabledForeground == null)
? null
: _TextButtonDefaultColor(foreground, disabledForeground);
final MaterialStateProperty<Color?>? backgroundColorProp = (backgroundColor == null && disabledBackgroundColor == null)
? null
: disabledBackgroundColor == null
? ButtonStyleButton.allOrNull<Color?>(backgroundColor)
: _TextButtonDefaultColor(backgroundColor, disabledBackgroundColor);
final MaterialStateProperty<Color?>? overlayColor = (foreground == null)
? null
: _TextButtonDefaultOverlay(foreground);
final MaterialStateProperty<Color?>? iconColorProp = (iconColor == null && disabledIconColor == null)
? null
: disabledIconColor == null
? ButtonStyleButton.allOrNull<Color?>(iconColor)
: _TextButtonDefaultIconColor(iconColor, disabledIconColor);
final MaterialStateProperty<Color?>? foregroundColorProp = switch ((foregroundColor, disabledForegroundColor)) {
(null, null) => null,
(_, _) => _TextButtonDefaultColor(foregroundColor, disabledForegroundColor),
};
final MaterialStateProperty<Color?>? backgroundColorProp = switch ((backgroundColor, disabledBackgroundColor)) {
(null, null) => null,
(_, null) => MaterialStatePropertyAll<Color?>(backgroundColor),
(_, _) => _TextButtonDefaultColor(backgroundColor, disabledBackgroundColor),
};
final MaterialStateProperty<Color?>? iconColorProp = switch ((iconColor, disabledIconColor)) {
(null, null) => null,
(_, null) => MaterialStatePropertyAll<Color?>(iconColor),
(_, _) => _TextButtonDefaultColor(iconColor, disabledIconColor),
};
final MaterialStateProperty<Color?>? overlayColorProp = switch ((foregroundColor, overlayColor)) {
(null, null) => null,
(_, final Color overlayColor) when overlayColor.value == 0 => const MaterialStatePropertyAll<Color?>(Colors.transparent),
(_, _) => _TextButtonDefaultOverlay((overlayColor ?? foregroundColor)!),
};
final MaterialStateProperty<MouseCursor?> mouseCursor = _TextButtonDefaultMouseCursor(enabledMouseCursor, disabledMouseCursor);
return ButtonStyle(
textStyle: ButtonStyleButton.allOrNull<TextStyle>(textStyle),
foregroundColor: foregroundColorProp,
backgroundColor: backgroundColorProp,
overlayColor: overlayColor,
overlayColor: overlayColorProp,
shadowColor: ButtonStyleButton.allOrNull<Color>(shadowColor),
surfaceTintColor: ButtonStyleButton.allOrNull<Color>(surfaceTintColor),
iconColor: iconColorProp,
@ -239,6 +251,8 @@ class TextButton extends ButtonStyleButton {
enableFeedback: enableFeedback,
alignment: alignment,
splashFactory: splashFactory,
backgroundBuilder: backgroundBuilder,
foregroundBuilder: foregroundBuilder,
);
}
@ -279,7 +293,7 @@ class TextButton extends ButtonStyleButton {
/// * disabled - Theme.colorScheme.onSurface(0.38)
/// * others - Theme.colorScheme.primary
/// * `overlayColor`
/// * hovered - Theme.colorScheme.primary(0.04)
/// * hovered - Theme.colorScheme.primary(0.08)
/// * focused or pressed - Theme.colorScheme.primary(0.12)
/// * `shadowColor` - Theme.shadowColor
/// * `elevation` - 0
@ -453,27 +467,6 @@ class _TextButtonDefaultOverlay extends MaterialStateProperty<Color?> {
}
}
@immutable
class _TextButtonDefaultIconColor extends MaterialStateProperty<Color?> {
_TextButtonDefaultIconColor(this.iconColor, this.disabledIconColor);
final Color? iconColor;
final Color? disabledIconColor;
@override
Color? resolve(Set<MaterialState> states) {
if (states.contains(MaterialState.disabled)) {
return disabledIconColor;
}
return iconColor;
}
@override
String toString() {
return '{disabled: $disabledIconColor, color: $iconColor}';
}
}
@immutable
class _TextButtonDefaultMouseCursor extends MaterialStateProperty<MouseCursor?> with Diagnosticable {
_TextButtonDefaultMouseCursor(this.enabledCursor, this.disabledCursor);
@ -500,13 +493,12 @@ class _TextButtonWithIcon extends TextButton {
super.style,
super.focusNode,
bool? autofocus,
Clip? clipBehavior,
super.clipBehavior,
super.statesController,
required Widget icon,
required Widget label,
}) : super(
autofocus: autofocus ?? false,
clipBehavior: clipBehavior ?? Clip.none,
child: _TextButtonWithIconChild(icon: icon, label: label, buttonStyle: style),
);

197
packages/flutter/test/material/elevated_button_test.dart
View file

@ -1981,6 +1981,203 @@ void main() {
expect(controller.value, <MaterialState>{MaterialState.disabled});
expect(count, 1);
});
testWidgets('ElevatedButton backgroundBuilder and foregroundBuilder', (WidgetTester tester) async {
const Color backgroundColor = Color(0xFF000011);
const Color foregroundColor = Color(0xFF000022);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: ElevatedButton(
style: ElevatedButton.styleFrom(
backgroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return DecoratedBox(
decoration: const BoxDecoration(
color: backgroundColor,
),
child: child,
);
},
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return DecoratedBox(
decoration: const BoxDecoration(
color: foregroundColor,
),
child: child,
);
},
),
onPressed: () { },
child: const Text('button'),
),
),
);
BoxDecoration boxDecorationOf(Finder finder) {
return tester.widget<DecoratedBox>(finder).decoration as BoxDecoration;
}
final Finder decorations = find.descendant(
of: find.byType(ElevatedButton),
matching: find.byType(DecoratedBox),
);
expect(boxDecorationOf(decorations.at(0)).color, backgroundColor);
expect(boxDecorationOf(decorations.at(1)).color, foregroundColor);
Text textChildOf(Finder finder) {
return tester.widget<Text>(
find.descendant(
of: finder,
matching: find.byType(Text),
),
);
}
expect(textChildOf(decorations.at(0)).data, 'button');
expect(textChildOf(decorations.at(1)).data, 'button');
});
testWidgets('ElevatedButton backgroundBuilder drops button child and foregroundBuilder return value', (WidgetTester tester) async {
const Color backgroundColor = Color(0xFF000011);
const Color foregroundColor = Color(0xFF000022);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: ElevatedButton(
style: ElevatedButton.styleFrom(
backgroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return const DecoratedBox(
decoration: BoxDecoration(
color: backgroundColor,
),
);
},
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return const DecoratedBox(
decoration: BoxDecoration(
color: foregroundColor,
),
);
},
),
onPressed: () { },
child: const Text('button'),
),
),
);
final Finder background = find.descendant(
of: find.byType(ElevatedButton),
matching: find.byType(DecoratedBox),
);
expect(background, findsOneWidget);
expect(find.text('button'), findsNothing);
});
testWidgets('ElevatedButton foregroundBuilder drops button child', (WidgetTester tester) async {
const Color foregroundColor = Color(0xFF000022);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: ElevatedButton(
style: ElevatedButton.styleFrom(
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return const DecoratedBox(
decoration: BoxDecoration(
color: foregroundColor,
),
);
},
),
onPressed: () { },
child: const Text('button'),
),
),
);
final Finder foreground = find.descendant(
of: find.byType(ElevatedButton),
matching: find.byType(DecoratedBox),
);
expect(foreground, findsOneWidget);
expect(find.text('button'), findsNothing);
});
testWidgets('ElevatedButton foreground and background builders are applied to the correct states', (WidgetTester tester) async {
Set<MaterialState> foregroundStates = <MaterialState>{};
Set<MaterialState> backgroundStates = <MaterialState>{};
final FocusNode focusNode = FocusNode();
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
body: Center(
child: ElevatedButton(
style: ButtonStyle(
backgroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
backgroundStates = states;
return child!;
},
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
foregroundStates = states;
return child!;
},
),
onPressed: () {},
focusNode: focusNode,
child: const Text('button'),
),
),
),
),
);
// Default.
expect(backgroundStates.isEmpty, isTrue);
expect(foregroundStates.isEmpty, isTrue);
const Set<MaterialState> focusedStates = <MaterialState>{MaterialState.focused};
const Set<MaterialState> focusedHoveredStates = <MaterialState>{MaterialState.focused, MaterialState.hovered};
const Set<MaterialState> focusedHoveredPressedStates = <MaterialState>{MaterialState.focused, MaterialState.hovered, MaterialState.pressed};
bool sameStates(Set<MaterialState> expectedValue, Set<MaterialState> actualValue) {
return expectedValue.difference(actualValue).isEmpty && actualValue.difference(expectedValue).isEmpty;
}
// Focused.
focusNode.requestFocus();
await tester.pumpAndSettle();
expect(sameStates(focusedStates, backgroundStates), isTrue);
expect(sameStates(focusedStates, foregroundStates), isTrue);
// Hovered.
final Offset center = tester.getCenter(find.byType(ElevatedButton));
final TestGesture gesture = await tester.createGesture(
kind: PointerDeviceKind.mouse,
);
await gesture.addPointer();
await gesture.moveTo(center);
await tester.pumpAndSettle();
expect(sameStates(focusedHoveredStates, backgroundStates), isTrue);
expect(sameStates(focusedHoveredStates, foregroundStates), isTrue);
// Highlighted (pressed).
await gesture.down(center);
await tester.pump(); // Start the splash and highlight animations.
await tester.pump(const Duration(milliseconds: 800)); // Wait for splash and highlight to be well under way.
expect(sameStates(focusedHoveredPressedStates, backgroundStates), isTrue);
expect(sameStates(focusedHoveredPressedStates, foregroundStates), isTrue);
focusNode.dispose();
});
}
TextStyle _iconStyle(WidgetTester tester, IconData icon) {

196
packages/flutter/test/material/filled_button_test.dart
View file

@ -2092,6 +2092,202 @@ void main() {
expect(count, 1);
});
testWidgets('FilledButton backgroundBuilder and foregroundBuilder', (WidgetTester tester) async {
const Color backgroundColor = Color(0xFF000011);
const Color foregroundColor = Color(0xFF000022);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: FilledButton(
style: FilledButton.styleFrom(
backgroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return DecoratedBox(
decoration: const BoxDecoration(
color: backgroundColor,
),
child: child,
);
},
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return DecoratedBox(
decoration: const BoxDecoration(
color: foregroundColor,
),
child: child,
);
},
),
onPressed: () { },
child: const Text('button'),
),
),
);
BoxDecoration boxDecorationOf(Finder finder) {
return tester.widget<DecoratedBox>(finder).decoration as BoxDecoration;
}
final Finder decorations = find.descendant(
of: find.byType(FilledButton),
matching: find.byType(DecoratedBox),
);
expect(boxDecorationOf(decorations.at(0)).color, backgroundColor);
expect(boxDecorationOf(decorations.at(1)).color, foregroundColor);
Text textChildOf(Finder finder) {
return tester.widget<Text>(
find.descendant(
of: finder,
matching: find.byType(Text),
),
);
}
expect(textChildOf(decorations.at(0)).data, 'button');
expect(textChildOf(decorations.at(1)).data, 'button');
});
testWidgets('FilledButton backgroundBuilder drops button child and foregroundBuilder return value', (WidgetTester tester) async {
const Color backgroundColor = Color(0xFF000011);
const Color foregroundColor = Color(0xFF000022);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: FilledButton(
style: FilledButton.styleFrom(
backgroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return const DecoratedBox(
decoration: BoxDecoration(
color: backgroundColor,
),
);
},
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return const DecoratedBox(
decoration: BoxDecoration(
color: foregroundColor,
),
);
},
),
onPressed: () { },
child: const Text('button'),
),
),
);
final Finder background = find.descendant(
of: find.byType(FilledButton),
matching: find.byType(DecoratedBox),
);
expect(background, findsOneWidget);
expect(find.text('button'), findsNothing);
});
testWidgets('FilledButton foregroundBuilder drops button child', (WidgetTester tester) async {
const Color foregroundColor = Color(0xFF000022);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: FilledButton(
style: FilledButton.styleFrom(
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return const DecoratedBox(
decoration: BoxDecoration(
color: foregroundColor,
),
);
},
),
onPressed: () { },
child: const Text('button'),
),
),
);
final Finder foreground = find.descendant(
of: find.byType(FilledButton),
matching: find.byType(DecoratedBox),
);
expect(foreground, findsOneWidget);
expect(find.text('button'), findsNothing);
});
testWidgets('FilledButton foreground and background builders are applied to the correct states', (WidgetTester tester) async {
Set<MaterialState> foregroundStates = <MaterialState>{};
Set<MaterialState> backgroundStates = <MaterialState>{};
final FocusNode focusNode = FocusNode();
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
body: Center(
child: FilledButton(
style: ButtonStyle(
backgroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
backgroundStates = states;
return child!;
},
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
foregroundStates = states;
return child!;
},
),
onPressed: () {},
focusNode: focusNode,
child: const Text('button'),
),
),
),
),
);
// Default.
expect(backgroundStates.isEmpty, isTrue);
expect(foregroundStates.isEmpty, isTrue);
const Set<MaterialState> focusedStates = <MaterialState>{MaterialState.focused};
const Set<MaterialState> focusedHoveredStates = <MaterialState>{MaterialState.focused, MaterialState.hovered};
const Set<MaterialState> focusedHoveredPressedStates = <MaterialState>{MaterialState.focused, MaterialState.hovered, MaterialState.pressed};
bool sameStates(Set<MaterialState> expectedValue, Set<MaterialState> actualValue) {
return expectedValue.difference(actualValue).isEmpty && actualValue.difference(expectedValue).isEmpty;
}
// Focused.
focusNode.requestFocus();
await tester.pumpAndSettle();
expect(sameStates(focusedStates, backgroundStates), isTrue);
expect(sameStates(focusedStates, foregroundStates), isTrue);
// Hovered.
final Offset center = tester.getCenter(find.byType(FilledButton));
final TestGesture gesture = await tester.createGesture(
kind: PointerDeviceKind.mouse,
);
await gesture.addPointer();
await gesture.moveTo(center);
await tester.pumpAndSettle();
expect(sameStates(focusedHoveredStates, backgroundStates), isTrue);
expect(sameStates(focusedHoveredStates, foregroundStates), isTrue);
// Highlighted (pressed).
await gesture.down(center);
await tester.pump(); // Start the splash and highlight animations.
await tester.pump(const Duration(milliseconds: 800)); // Wait for splash and highlight to be well under way.
expect(sameStates(focusedHoveredPressedStates, backgroundStates), isTrue);
expect(sameStates(focusedHoveredPressedStates, foregroundStates), isTrue);
focusNode.dispose();
});
}
TextStyle _iconStyle(WidgetTester tester, IconData icon) {

226
packages/flutter/test/material/outlined_button_test.dart
View file

@ -2131,6 +2131,232 @@ void main() {
expect(tester.takeException(), isNull);
});
testWidgets('OutlinedButton backgroundBuilder and foregroundBuilder', (WidgetTester tester) async {
const Color backgroundColor = Color(0xFF000011);
const Color foregroundColor = Color(0xFF000022);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: OutlinedButton(
style: OutlinedButton.styleFrom(
backgroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return DecoratedBox(
decoration: const BoxDecoration(
color: backgroundColor,
),
child: child,
);
},
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return DecoratedBox(
decoration: const BoxDecoration(
color: foregroundColor,
),
child: child,
);
},
),
onPressed: () { },
child: const Text('button'),
),
),
);
BoxDecoration boxDecorationOf(Finder finder) {
return tester.widget<DecoratedBox>(finder).decoration as BoxDecoration;
}
final Finder decorations = find.descendant(
of: find.byType(OutlinedButton),
matching: find.byType(DecoratedBox),
);
expect(boxDecorationOf(decorations.at(0)).color, backgroundColor);
expect(boxDecorationOf(decorations.at(1)).color, foregroundColor);
Text textChildOf(Finder finder) {
return tester.widget<Text>(
find.descendant(
of: finder,
matching: find.byType(Text),
),
);
}
expect(textChildOf(decorations.at(0)).data, 'button');
expect(textChildOf(decorations.at(1)).data, 'button');
});
testWidgets('OutlinedButton backgroundBuilder drops button child and foregroundBuilder return value', (WidgetTester tester) async {
const Color backgroundColor = Color(0xFF000011);
const Color foregroundColor = Color(0xFF000022);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: OutlinedButton(
style: OutlinedButton.styleFrom(
backgroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return const DecoratedBox(
decoration: BoxDecoration(
color: backgroundColor,
),
);
},
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return const DecoratedBox(
decoration: BoxDecoration(
color: foregroundColor,
),
);
},
),
onPressed: () { },
child: const Text('button'),
),
),
);
final Finder background = find.descendant(
of: find.byType(OutlinedButton),
matching: find.byType(DecoratedBox),
);
expect(background, findsOneWidget);
expect(find.text('button'), findsNothing);
});
testWidgets('OutlinedButton foregroundBuilder drops button child', (WidgetTester tester) async {
const Color foregroundColor = Color(0xFF000022);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: OutlinedButton(
style: OutlinedButton.styleFrom(
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return const DecoratedBox(
decoration: BoxDecoration(
color: foregroundColor,
),
);
},
),
onPressed: () { },
child: const Text('button'),
),
),
);
final Finder foreground = find.descendant(
of: find.byType(OutlinedButton),
matching: find.byType(DecoratedBox),
);
expect(foreground, findsOneWidget);
expect(find.text('button'), findsNothing);
});
testWidgets('OutlinedButton foreground and background builders are applied to the correct states', (WidgetTester tester) async {
Set<MaterialState> foregroundStates = <MaterialState>{};
Set<MaterialState> backgroundStates = <MaterialState>{};
final FocusNode focusNode = FocusNode();
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
body: Center(
child: OutlinedButton(
style: ButtonStyle(
backgroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
backgroundStates = states;
return child!;
},
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
foregroundStates = states;
return child!;
},
),
onPressed: () {},
focusNode: focusNode,
child: const Text('button'),
),
),
),
),
);
// Default.
expect(backgroundStates.isEmpty, isTrue);
expect(foregroundStates.isEmpty, isTrue);
const Set<MaterialState> focusedStates = <MaterialState>{MaterialState.focused};
const Set<MaterialState> focusedHoveredStates = <MaterialState>{MaterialState.focused, MaterialState.hovered};
const Set<MaterialState> focusedHoveredPressedStates = <MaterialState>{MaterialState.focused, MaterialState.hovered, MaterialState.pressed};
bool sameStates(Set<MaterialState> expectedValue, Set<MaterialState> actualValue) {
return expectedValue.difference(actualValue).isEmpty && actualValue.difference(expectedValue).isEmpty;
}
// Focused.
focusNode.requestFocus();
await tester.pumpAndSettle();
expect(sameStates(focusedStates, backgroundStates), isTrue);
expect(sameStates(focusedStates, foregroundStates), isTrue);
// Hovered.
final Offset center = tester.getCenter(find.byType(OutlinedButton));
final TestGesture gesture = await tester.createGesture(
kind: PointerDeviceKind.mouse,
);
await gesture.addPointer();
await gesture.moveTo(center);
await tester.pumpAndSettle();
expect(sameStates(focusedHoveredStates, backgroundStates), isTrue);
expect(sameStates(focusedHoveredStates, foregroundStates), isTrue);
// Highlighted (pressed).
await gesture.down(center);
await tester.pump(); // Start the splash and highlight animations.
await tester.pump(const Duration(milliseconds: 800)); // Wait for splash and highlight to be well under way.
expect(sameStates(focusedHoveredPressedStates, backgroundStates), isTrue);
expect(sameStates(focusedHoveredPressedStates, foregroundStates), isTrue);
focusNode.dispose();
});
testWidgets('OutlinedButton styleFrom backgroundColor special case', (WidgetTester tester) async {
// Regression test for an internal Google issue: b/323399158
const Color backgroundColor = Color(0xFF000022);
Widget buildFrame({ VoidCallback? onPressed }) {
return Directionality(
textDirection: TextDirection.ltr,
child: OutlinedButton(
style: OutlinedButton.styleFrom(
backgroundColor: backgroundColor,
),
onPressed: () { },
child: const Text('button'),
),
);
}
await tester.pumpWidget(buildFrame(onPressed: () { })); // enabled
final Material material = tester.widget<Material>(find.descendant(
of: find.byType(OutlinedButton),
matching: find.byType(Material),
));
expect(material.color, backgroundColor);
await tester.pumpWidget(buildFrame()); // onPressed: null - disabled
expect(material.color, backgroundColor);
});
}
TextStyle _iconStyle(WidgetTester tester, IconData icon) {

226
packages/flutter/test/material/text_button_test.dart
View file

@ -1964,6 +1964,232 @@ void main() {
expect(tester.takeException(), isNull);
});
testWidgets('TextButton backgroundBuilder and foregroundBuilder', (WidgetTester tester) async {
const Color backgroundColor = Color(0xFF000011);
const Color foregroundColor = Color(0xFF000022);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: TextButton(
style: TextButton.styleFrom(
backgroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return DecoratedBox(
decoration: const BoxDecoration(
color: backgroundColor,
),
child: child,
);
},
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return DecoratedBox(
decoration: const BoxDecoration(
color: foregroundColor,
),
child: child,
);
},
),
onPressed: () { },
child: const Text('button'),
),
),
);
BoxDecoration boxDecorationOf(Finder finder) {
return tester.widget<DecoratedBox>(finder).decoration as BoxDecoration;
}
final Finder decorations = find.descendant(
of: find.byType(TextButton),
matching: find.byType(DecoratedBox),
);
expect(boxDecorationOf(decorations.at(0)).color, backgroundColor);
expect(boxDecorationOf(decorations.at(1)).color, foregroundColor);
Text textChildOf(Finder finder) {
return tester.widget<Text>(
find.descendant(
of: finder,
matching: find.byType(Text),
),
);
}
expect(textChildOf(decorations.at(0)).data, 'button');
expect(textChildOf(decorations.at(1)).data, 'button');
});
testWidgets('TextButton backgroundBuilder drops button child and foregroundBuilder return value', (WidgetTester tester) async {
const Color backgroundColor = Color(0xFF000011);
const Color foregroundColor = Color(0xFF000022);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: TextButton(
style: TextButton.styleFrom(
backgroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return const DecoratedBox(
decoration: BoxDecoration(
color: backgroundColor,
),
);
},
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return const DecoratedBox(
decoration: BoxDecoration(
color: foregroundColor,
),
);
},
),
onPressed: () { },
child: const Text('button'),
),
),
);
final Finder background = find.descendant(
of: find.byType(TextButton),
matching: find.byType(DecoratedBox),
);
expect(background, findsOneWidget);
expect(find.text('button'), findsNothing);
});
testWidgets('TextButton foregroundBuilder drops button child', (WidgetTester tester) async {
const Color foregroundColor = Color(0xFF000022);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: TextButton(
style: TextButton.styleFrom(
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
return const DecoratedBox(
decoration: BoxDecoration(
color: foregroundColor,
),
);
},
),
onPressed: () { },
child: const Text('button'),
),
),
);
final Finder foreground = find.descendant(
of: find.byType(TextButton),
matching: find.byType(DecoratedBox),
);
expect(foreground, findsOneWidget);
expect(find.text('button'), findsNothing);
});
testWidgets('TextButton foreground and background builders are applied to the correct states', (WidgetTester tester) async {
Set<MaterialState> foregroundStates = <MaterialState>{};
Set<MaterialState> backgroundStates = <MaterialState>{};
final FocusNode focusNode = FocusNode();
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
body: Center(
child: TextButton(
style: ButtonStyle(
backgroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
backgroundStates = states;
return child!;
},
foregroundBuilder: (BuildContext context, Set<MaterialState> states, Widget? child) {
foregroundStates = states;
return child!;
},
),
onPressed: () {},
focusNode: focusNode,
child: const Text('button'),
),
),
),
),
);
// Default.
expect(backgroundStates.isEmpty, isTrue);
expect(foregroundStates.isEmpty, isTrue);
const Set<MaterialState> focusedStates = <MaterialState>{MaterialState.focused};
const Set<MaterialState> focusedHoveredStates = <MaterialState>{MaterialState.focused, MaterialState.hovered};
const Set<MaterialState> focusedHoveredPressedStates = <MaterialState>{MaterialState.focused, MaterialState.hovered, MaterialState.pressed};
bool sameStates(Set<MaterialState> expectedValue, Set<MaterialState> actualValue) {
return expectedValue.difference(actualValue).isEmpty && actualValue.difference(expectedValue).isEmpty;
}
// Focused.
focusNode.requestFocus();
await tester.pumpAndSettle();
expect(sameStates(focusedStates, backgroundStates), isTrue);
expect(sameStates(focusedStates, foregroundStates), isTrue);
// Hovered.
final Offset center = tester.getCenter(find.byType(TextButton));
final TestGesture gesture = await tester.createGesture(
kind: PointerDeviceKind.mouse,
);
await gesture.addPointer();
await gesture.moveTo(center);
await tester.pumpAndSettle();
expect(sameStates(focusedHoveredStates, backgroundStates), isTrue);
expect(sameStates(focusedHoveredStates, foregroundStates), isTrue);
// Highlighted (pressed).
await gesture.down(center);
await tester.pump(); // Start the splash and highlight animations.
await tester.pump(const Duration(milliseconds: 800)); // Wait for splash and highlight to be well under way.
expect(sameStates(focusedHoveredPressedStates, backgroundStates), isTrue);
expect(sameStates(focusedHoveredPressedStates, foregroundStates), isTrue);
focusNode.dispose();
});
testWidgets('TextButton styleFrom backgroundColor special case', (WidgetTester tester) async {
// Regression test for an internal Google issue: b/323399158
const Color backgroundColor = Color(0xFF000022);
Widget buildFrame({ VoidCallback? onPressed }) {
return Directionality(
textDirection: TextDirection.ltr,
child: TextButton(
style: TextButton.styleFrom(
backgroundColor: backgroundColor,
),
onPressed: () { },
child: const Text('button'),
),
);
}
await tester.pumpWidget(buildFrame(onPressed: () { })); // enabled
final Material material = tester.widget<Material>(find.descendant(
of: find.byType(TextButton),
matching: find.byType(Material),
));
expect(material.color, backgroundColor);
await tester.pumpWidget(buildFrame()); // onPressed: null - disabled
expect(material.color, backgroundColor);
});
}
TextStyle? _iconStyle(WidgetTester tester, IconData icon) {

13
packages/flutter/test/material/text_button_theme_test.dart
View file

@ -104,6 +104,15 @@ void main() {
const bool enableFeedback = false;
const AlignmentGeometry alignment = Alignment.centerLeft;
final Key backgroundKey = UniqueKey();
final Key foregroundKey = UniqueKey();
Widget backgroundBuilder(BuildContext context, Set<MaterialState> states, Widget? child) {
return KeyedSubtree(key: backgroundKey, child: child!);
}
Widget foregroundBuilder(BuildContext context, Set<MaterialState> states, Widget? child) {
return KeyedSubtree(key: foregroundKey, child: child!);
}
final ButtonStyle style = TextButton.styleFrom(
foregroundColor: foregroundColor,
disabledForegroundColor: disabledColor,
@ -122,6 +131,8 @@ void main() {
animationDuration: animationDuration,
enableFeedback: enableFeedback,
alignment: alignment,
backgroundBuilder: backgroundBuilder,
foregroundBuilder: foregroundBuilder,
);
Widget buildFrame({ ButtonStyle? buttonStyle, ButtonStyle? themeStyle, ButtonStyle? overallStyle }) {
@ -185,6 +196,8 @@ void main() {
expect(tester.getSize(find.byType(TextButton)), const Size(200, 200));
final Align align = tester.firstWidget<Align>(find.ancestor(of: find.text('button'), matching: find.byType(Align)));
expect(align.alignment, alignment);
expect(find.descendant(of: findMaterial, matching: find.byKey(backgroundKey)), findsOneWidget);
expect(find.descendant(of: findInkWell, matching: find.byKey(foregroundKey)), findsOneWidget);
}
testWidgets('Button style overrides defaults', (WidgetTester tester) async {