packages/flutter/lib/src/material/filled_button.dart

// 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:math' as math;
import 'dart:ui' show lerpDouble;

import 'package:flutter/foundation.dart';
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 'filled_button_theme.dart';
import 'ink_well.dart';
import 'material_state.dart';
import 'theme.dart';
import 'theme_data.dart';

enum _FilledButtonVariant { filled, tonal }

/// A Material Design filled button.
///
/// Filled buttons have the most visual impact after the [FloatingActionButton],
/// and should be used for important, final actions that complete a flow,
/// like **Save**, **Join now**, or **Confirm**.
///
/// A filled button is a label [child] displayed on a [Material]
/// widget. The label's [Text] and [Icon] widgets are displayed in
/// [style]'s [ButtonStyle.foregroundColor] and the button's filled
/// background is the [ButtonStyle.backgroundColor].
///
/// The filled button's default style is defined by
/// [defaultStyleOf]. The style of this filled button can be
/// overridden with its [style] parameter. The style of all filled
/// buttons in a subtree can be overridden with the
/// [FilledButtonTheme], and the style of all of the filled
/// buttons in an app can be overridden with the [Theme]'s
/// [ThemeData.filledButtonTheme] property.
///
/// The static [styleFrom] method is a convenient way to create a
/// filled button [ButtonStyle] from simple values.
///
/// If [onPressed] and [onLongPress] callbacks are null, then the
/// button will be disabled.
///
/// To create a 'filled tonal' button, use [FilledButton.tonal].
///
/// {@tool dartpad}
/// This sample produces enabled and disabled filled and filled tonal
/// buttons.
///
/// ** See code in examples/api/lib/material/filled_button/filled_button.0.dart **
/// {@end-tool}
///
/// See also:
///
///  * [ElevatedButton], a filled button whose material elevates when pressed.
///  * [OutlinedButton], a button with an outlined border and no fill color.
///  * [TextButton], a button with no outline or fill color.
///  * <https://material.io/design/components/buttons.html>
///  * <https://m3.material.io/components/buttons>
class FilledButton extends ButtonStyleButton {
  /// Create a FilledButton.
  ///
  /// The [autofocus] and [clipBehavior] arguments must not be null.
  const FilledButton({
    super.key,
    required super.onPressed,
    super.onLongPress,
    super.onHover,
    super.onFocusChange,
    super.style,
    super.focusNode,
    super.autofocus = false,
    super.clipBehavior = Clip.none,
    super.statesController,
    required super.child,
  }) : _variant = _FilledButtonVariant.filled;

  /// Create a filled button from [icon] and [label].
  ///
  /// The icon and label are arranged in a row with padding at the start and end
  /// and a gap between them.
  ///
  /// The [icon] and [label] arguments must not be null.
  factory FilledButton.icon({
    Key? key,
    required VoidCallback? onPressed,
    VoidCallback? onLongPress,
    ValueChanged<bool>? onHover,
    ValueChanged<bool>? onFocusChange,
    ButtonStyle? style,
    FocusNode? focusNode,
    bool? autofocus,
    Clip? clipBehavior,
    MaterialStatesController? statesController,
    required Widget icon,
    required Widget label,
  }) = _FilledButtonWithIcon;

  /// Create a tonal variant of FilledButton.
  ///
  /// A filled tonal button is an alternative middle ground between
  /// [FilledButton] and [OutlinedButton]. They’re useful in contexts where
  /// a lower-priority button requires slightly more emphasis than an
  /// outline would give, such as "Next" in an onboarding flow.
  ///
  /// The [autofocus] and [clipBehavior] arguments must not be null.
  const FilledButton.tonal({
    super.key,
    required super.onPressed,
    super.onLongPress,
    super.onHover,
    super.onFocusChange,
    super.style,
    super.focusNode,
    super.autofocus = false,
    super.clipBehavior = Clip.none,
    super.statesController,
    required super.child,
  }) : _variant = _FilledButtonVariant.tonal;

  /// Create a filled tonal button from [icon] and [label].
  ///
  /// The icon and label are arranged in a row with padding at the start and end
  /// and a gap between them.
  ///
  /// The [icon] and [label] arguments must not be null.
  factory FilledButton.tonalIcon({
    Key? key,
    required VoidCallback? onPressed,
    VoidCallback? onLongPress,
    ValueChanged<bool>? onHover,
    ValueChanged<bool>? onFocusChange,
    ButtonStyle? style,
    FocusNode? focusNode,
    bool? autofocus,
    Clip? clipBehavior,
    MaterialStatesController? statesController,
    required Widget icon,
    required Widget label,
  }) {
    return _FilledButtonWithIcon.tonal(
      key: key,
      onPressed: onPressed,
      onLongPress: onLongPress,
      onHover: onHover,
      onFocusChange: onFocusChange,
      style: style,
      focusNode: focusNode,
      autofocus: autofocus,
      clipBehavior: clipBehavior,
      statesController: statesController,
      icon: icon,
      label: label,
    );
  }

  /// 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 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.
  ///
  /// All parameters default to null, by default this method returns
  /// a [ButtonStyle] that doesn't override anything.
  ///
  /// For example, to override the default text and icon colors for a
  /// [FilledButton], as well as its overlay color, with all of the
  /// standard opacity adjustments for the pressed, focused, and
  /// hovered states, one could write:
  ///
  /// ```dart
  /// FilledButton(
  ///   style: FilledButton.styleFrom(foregroundColor: Colors.green),
  ///   onPressed: () {},
  ///   child: const Text('Filled button'),
  /// );
  /// ```
  ///
  /// or for a Filled tonal variant:
  /// ```dart
  /// FilledButton.tonal(
  ///   style: FilledButton.styleFrom(foregroundColor: Colors.green),
  ///   onPressed: () {},
  ///   child: const Text('Filled tonal button'),
  /// );
  /// ```
  static ButtonStyle styleFrom({
    Color? foregroundColor,
    Color? backgroundColor,
    Color? disabledForegroundColor,
    Color? disabledBackgroundColor,
    Color? shadowColor,
    Color? surfaceTintColor,
    double? elevation,
    TextStyle? textStyle,
    EdgeInsetsGeometry? padding,
    Size? minimumSize,
    Size? fixedSize,
    Size? maximumSize,
    BorderSide? side,
    OutlinedBorder? shape,
    MouseCursor? enabledMouseCursor,
    MouseCursor? disabledMouseCursor,
    VisualDensity? visualDensity,
    MaterialTapTargetSize? tapTargetSize,
    Duration? animationDuration,
    bool? enableFeedback,
    AlignmentGeometry? alignment,
    InteractiveInkFeatureFactory? splashFactory,
  }) {
    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<MouseCursor?> mouseCursor = _FilledButtonDefaultMouseCursor(enabledMouseCursor, disabledMouseCursor);

    return ButtonStyle(
      textStyle: MaterialStatePropertyAll<TextStyle?>(textStyle),
      backgroundColor: backgroundColorProp,
      foregroundColor: foregroundColorProp,
      overlayColor: overlayColor,
      shadowColor: ButtonStyleButton.allOrNull<Color>(shadowColor),
      surfaceTintColor: ButtonStyleButton.allOrNull<Color>(surfaceTintColor),
      elevation: ButtonStyleButton.allOrNull(elevation),
      padding: ButtonStyleButton.allOrNull<EdgeInsetsGeometry>(padding),
      minimumSize: ButtonStyleButton.allOrNull<Size>(minimumSize),
      fixedSize: ButtonStyleButton.allOrNull<Size>(fixedSize),
      maximumSize: ButtonStyleButton.allOrNull<Size>(maximumSize),
      side: ButtonStyleButton.allOrNull<BorderSide>(side),
      shape: ButtonStyleButton.allOrNull<OutlinedBorder>(shape),
      mouseCursor: mouseCursor,
      visualDensity: visualDensity,
      tapTargetSize: tapTargetSize,
      animationDuration: animationDuration,
      enableFeedback: enableFeedback,
      alignment: alignment,
      splashFactory: splashFactory,
    );
  }

  final _FilledButtonVariant _variant;

  /// Defines the button's default appearance.
  ///
  /// The button [child]'s [Text] and [Icon] widgets are rendered with
  /// the [ButtonStyle]'s foreground color. The button's [InkWell] adds
  /// the style's overlay color when the button is focused, hovered
  /// or pressed. The button's background color becomes its [Material]
  /// color.
  ///
  /// All of the ButtonStyle's defaults appear below. In this list
  /// "Theme.foo" is shorthand for `Theme.of(context).foo`. Color
  /// scheme values like "onSurface(0.38)" are shorthand for
  /// `onSurface.withOpacity(0.38)`. [MaterialStateProperty] valued
  /// properties that are not followed by a sublist have the same
  /// value for all states, otherwise the values are as specified for
  /// each state, and "others" means all other states.
  ///
  /// The `textScaleFactor` is the value of
  /// `MediaQuery.textScalerOf(context).textScaleFactor` and the names of the
  /// EdgeInsets constructors and `EdgeInsetsGeometry.lerp` have been
  /// abbreviated for readability.
  ///
  /// The color of the [ButtonStyle.textStyle] is not used, the
  /// [ButtonStyle.foregroundColor] color is used instead.
  ///
  /// * `textStyle` - Theme.textTheme.labelLarge
  /// * `backgroundColor`
  ///   * disabled - Theme.colorScheme.onSurface(0.12)
  ///   * others - Theme.colorScheme.secondaryContainer
  /// * `foregroundColor`
  ///   * disabled - Theme.colorScheme.onSurface(0.38)
  ///   * others - Theme.colorScheme.onSecondaryContainer
  /// * `overlayColor`
  ///   * hovered - Theme.colorScheme.onSecondaryContainer(0.08)
  ///   * focused or pressed - Theme.colorScheme.onSecondaryContainer(0.12)
  /// * `shadowColor` - Theme.colorScheme.shadow
  /// * `surfaceTintColor` - null
  /// * `elevation`
  ///   * disabled - 0
  ///   * default - 0
  ///   * hovered - 1
  ///   * focused or pressed - 0
  /// * `padding`
  ///   * `textScaleFactor <= 1` - horizontal(16)
  ///   * `1 < textScaleFactor <= 2` - lerp(horizontal(16), horizontal(8))
  ///   * `2 < textScaleFactor <= 3` - lerp(horizontal(8), horizontal(4))
  ///   * `3 < textScaleFactor` - horizontal(4)
  /// * `minimumSize` - Size(64, 40)
  /// * `fixedSize` - null
  /// * `maximumSize` - Size.infinite
  /// * `side` - null
  /// * `shape` - StadiumBorder()
  /// * `mouseCursor`
  ///   * disabled - SystemMouseCursors.basic
  ///   * others - SystemMouseCursors.click
  /// * `visualDensity` - Theme.visualDensity
  /// * `tapTargetSize` - Theme.materialTapTargetSize
  /// * `animationDuration` - kThemeChangeDuration
  /// * `enableFeedback` - true
  /// * `alignment` - Alignment.center
  /// * `splashFactory` - Theme.splashFactory
  ///
  /// The default padding values for the [FilledButton.icon] factory are slightly different:
  ///
  /// * `padding`
  ///   * `textScaleFactor <= 1` - start(12) end(16)
  ///   * `1 < textScaleFactor <= 2` - lerp(start(12) end(16), horizontal(8))
  ///   * `2 < textScaleFactor <= 3` - lerp(horizontal(8), horizontal(4))
  ///   * `3 < textScaleFactor` - horizontal(4)
  ///
  /// The default value for `side`, which defines the appearance of the button's
  /// outline, is null. That means that the outline is defined by the button
  /// shape's [OutlinedBorder.side]. Typically the default value of an
  /// [OutlinedBorder]'s side is [BorderSide.none], so an outline is not drawn.
  ///
  /// ## Material 3 defaults
  ///
  /// If [ThemeData.useMaterial3] is set to true the following defaults will
  /// be used:
  ///
  /// * `textStyle` - Theme.textTheme.labelLarge
  /// * `backgroundColor`
  ///   * disabled - Theme.colorScheme.onSurface(0.12)
  ///   * others - Theme.colorScheme.secondaryContainer
  /// * `foregroundColor`
  ///   * disabled - Theme.colorScheme.onSurface(0.38)
  ///   * others - Theme.colorScheme.onSecondaryContainer
  /// * `overlayColor`
  ///   * hovered - Theme.colorScheme.onSecondaryContainer(0.08)
  ///   * focused or pressed - Theme.colorScheme.onSecondaryContainer(0.12)
  /// * `shadowColor` - Theme.colorScheme.shadow
  /// * `surfaceTintColor` - Colors.transparent
  /// * `elevation`
  ///   * disabled - 0
  ///   * default - 1
  ///   * hovered - 3
  ///   * focused or pressed - 1
  /// * `padding`
  ///   * `textScaleFactor <= 1` - horizontal(24)
  ///   * `1 < textScaleFactor <= 2` - lerp(horizontal(24), horizontal(12))
  ///   * `2 < textScaleFactor <= 3` - lerp(horizontal(12), horizontal(6))
  ///   * `3 < textScaleFactor` - horizontal(6)
  /// * `minimumSize` - Size(64, 40)
  /// * `fixedSize` - null
  /// * `maximumSize` - Size.infinite
  /// * `side` - null
  /// * `shape` - StadiumBorder()
  /// * `mouseCursor`
  ///   * disabled - SystemMouseCursors.basic
  ///   * others - SystemMouseCursors.click
  /// * `visualDensity` - Theme.visualDensity
  /// * `tapTargetSize` - Theme.materialTapTargetSize
  /// * `animationDuration` - kThemeChangeDuration
  /// * `enableFeedback` - true
  /// * `alignment` - Alignment.center
  /// * `splashFactory` - Theme.splashFactory
  ///
  /// For the [FilledButton.icon] factory, the start (generally the left) value of
  /// [padding] is reduced from 24 to 16.
  @override
  ButtonStyle defaultStyleOf(BuildContext context) {
    switch (_variant) {
      case _FilledButtonVariant.filled:
        return _FilledButtonDefaultsM3(context);
      case _FilledButtonVariant.tonal:
        return _FilledTonalButtonDefaultsM3(context);
    }
  }

  /// Returns the [FilledButtonThemeData.style] of the closest
  /// [FilledButtonTheme] ancestor.
  @override
  ButtonStyle? themeStyleOf(BuildContext context) {
    return FilledButtonTheme.of(context).style;
  }
}

EdgeInsetsGeometry _scaledPadding(BuildContext context) {
  final bool useMaterial3 = Theme.of(context).useMaterial3;
  final double padding1x = useMaterial3 ? 24.0 : 16.0;
  return ButtonStyleButton.scaledPadding(
     EdgeInsets.symmetric(horizontal: padding1x),
     EdgeInsets.symmetric(horizontal: padding1x / 2),
     EdgeInsets.symmetric(horizontal: padding1x / 2 / 2),
    MediaQuery.textScalerOf(context).textScaleFactor,
  );
}

@immutable
class _FilledButtonDefaultColor extends MaterialStateProperty<Color?> with Diagnosticable {
  _FilledButtonDefaultColor(this.color, this.disabled);

  final Color? color;
  final Color? disabled;

  @override
  Color? resolve(Set<MaterialState> states) {
    if (states.contains(MaterialState.disabled)) {
      return disabled;
    }
    return color;
  }
}

@immutable
class _FilledButtonDefaultOverlay extends MaterialStateProperty<Color?> with Diagnosticable {
  _FilledButtonDefaultOverlay(this.overlay);

  final Color overlay;

  @override
  Color? resolve(Set<MaterialState> states) {
    if (states.contains(MaterialState.pressed)) {
      return overlay.withOpacity(0.12);
    }
    if (states.contains(MaterialState.hovered)) {
      return overlay.withOpacity(0.08);
    }
    if (states.contains(MaterialState.focused)) {
      return overlay.withOpacity(0.12);
    }
    return null;
  }
}

@immutable
class _FilledButtonDefaultMouseCursor extends MaterialStateProperty<MouseCursor?> with Diagnosticable {
  _FilledButtonDefaultMouseCursor(this.enabledCursor, this.disabledCursor);

  final MouseCursor? enabledCursor;
  final MouseCursor? disabledCursor;

  @override
  MouseCursor? resolve(Set<MaterialState> states) {
    if (states.contains(MaterialState.disabled)) {
      return disabledCursor;
    }
    return enabledCursor;
  }
}

class _FilledButtonWithIcon extends FilledButton {
  _FilledButtonWithIcon({
    super.key,
    required super.onPressed,
    super.onLongPress,
    super.onHover,
    super.onFocusChange,
    super.style,
    super.focusNode,
    bool? autofocus,
    Clip? clipBehavior,
    super.statesController,
    required Widget icon,
    required Widget label,
  }) : super(
         autofocus: autofocus ?? false,
         clipBehavior: clipBehavior ?? Clip.none,
         child: _FilledButtonWithIconChild(icon: icon, label: label)
      );

  _FilledButtonWithIcon.tonal({
    super.key,
    required super.onPressed,
    super.onLongPress,
    super.onHover,
    super.onFocusChange,
    super.style,
    super.focusNode,
    bool? autofocus,
    Clip? clipBehavior,
    super.statesController,
    required Widget icon,
    required Widget label,
  }) : super.tonal(
         autofocus: autofocus ?? false,
         clipBehavior: clipBehavior ?? Clip.none,
         child: _FilledButtonWithIconChild(icon: icon, label: label)
       );

  @override
  ButtonStyle defaultStyleOf(BuildContext context) {
    final bool useMaterial3 = Theme.of(context).useMaterial3;
    final EdgeInsetsGeometry scaledPadding = useMaterial3 ?  ButtonStyleButton.scaledPadding(
      const EdgeInsetsDirectional.fromSTEB(16, 0, 24, 0),
      const EdgeInsetsDirectional.fromSTEB(8, 0, 12, 0),
      const EdgeInsetsDirectional.fromSTEB(4, 0, 6, 0),
      MediaQuery.textScalerOf(context).textScaleFactor,
    ) : ButtonStyleButton.scaledPadding(
      const EdgeInsetsDirectional.fromSTEB(12, 0, 16, 0),
      const EdgeInsets.symmetric(horizontal: 8),
      const EdgeInsetsDirectional.fromSTEB(8, 0, 4, 0),
      MediaQuery.textScalerOf(context).textScaleFactor,
    );
    return super.defaultStyleOf(context).copyWith(
      padding: MaterialStatePropertyAll<EdgeInsetsGeometry>(scaledPadding),
    );
  }
}

class _FilledButtonWithIconChild extends StatelessWidget {
  const _FilledButtonWithIconChild({ required this.label, required this.icon });

  final Widget label;
  final Widget icon;

  @override
  Widget build(BuildContext context) {
    final double scale = MediaQuery.textScalerOf(context).textScaleFactor;
    // Adjust the gap based on the text scale factor. Start at 8, and lerp
    // to 4 based on how large the text is.
    final double gap = scale <= 1 ? 8 : lerpDouble(8, 4, math.min(scale - 1, 1))!;
    return Row(
      mainAxisSize: MainAxisSize.min,
      children: <Widget>[icon, SizedBox(width: gap), Flexible(child: label)],
    );
  }
}

// BEGIN GENERATED TOKEN PROPERTIES - FilledButton

// Do not edit by hand. The code between the "BEGIN GENERATED" and
// "END GENERATED" comments are generated from data in the Material
// Design token database by the script:
//   dev/tools/gen_defaults/bin/gen_defaults.dart.

class _FilledButtonDefaultsM3 extends ButtonStyle {
  _FilledButtonDefaultsM3(this.context)
   : super(
       animationDuration: kThemeChangeDuration,
       enableFeedback: true,
       alignment: Alignment.center,
     );

  final BuildContext context;
  late final ColorScheme _colors = Theme.of(context).colorScheme;

  @override
  MaterialStateProperty<TextStyle?> get textStyle =>
    MaterialStatePropertyAll<TextStyle?>(Theme.of(context).textTheme.labelLarge);

  @override
  MaterialStateProperty<Color?>? get backgroundColor =>
    MaterialStateProperty.resolveWith((Set<MaterialState> states) {
      if (states.contains(MaterialState.disabled)) {
        return _colors.onSurface.withOpacity(0.12);
      }
      return _colors.primary;
    });

  @override
  MaterialStateProperty<Color?>? get foregroundColor =>
    MaterialStateProperty.resolveWith((Set<MaterialState> states) {
      if (states.contains(MaterialState.disabled)) {
        return _colors.onSurface.withOpacity(0.38);
      }
      return _colors.onPrimary;
    });

  @override
  MaterialStateProperty<Color?>? get overlayColor =>
    MaterialStateProperty.resolveWith((Set<MaterialState> states) {
      if (states.contains(MaterialState.pressed)) {
        return _colors.onPrimary.withOpacity(0.12);
      }
      if (states.contains(MaterialState.hovered)) {
        return _colors.onPrimary.withOpacity(0.08);
      }
      if (states.contains(MaterialState.focused)) {
        return _colors.onPrimary.withOpacity(0.12);
      }
      return null;
    });

  @override
  MaterialStateProperty<Color>? get shadowColor =>
    MaterialStatePropertyAll<Color>(_colors.shadow);

  @override
  MaterialStateProperty<Color>? get surfaceTintColor =>
    const MaterialStatePropertyAll<Color>(Colors.transparent);

  @override
  MaterialStateProperty<double>? get elevation =>
    MaterialStateProperty.resolveWith((Set<MaterialState> states) {
      if (states.contains(MaterialState.disabled)) {
        return 0.0;
      }
      if (states.contains(MaterialState.pressed)) {
        return 0.0;
      }
      if (states.contains(MaterialState.hovered)) {
        return 1.0;
      }
      if (states.contains(MaterialState.focused)) {
        return 0.0;
      }
      return 0.0;
    });

  @override
  MaterialStateProperty<EdgeInsetsGeometry>? get padding =>
    MaterialStatePropertyAll<EdgeInsetsGeometry>(_scaledPadding(context));

  @override
  MaterialStateProperty<Size>? get minimumSize =>
    const MaterialStatePropertyAll<Size>(Size(64.0, 40.0));

  // No default fixedSize

  @override
  MaterialStateProperty<Size>? get maximumSize =>
    const MaterialStatePropertyAll<Size>(Size.infinite);

  // No default side

  @override
  MaterialStateProperty<OutlinedBorder>? get shape =>
    const MaterialStatePropertyAll<OutlinedBorder>(StadiumBorder());

  @override
  MaterialStateProperty<MouseCursor?>? get mouseCursor =>
    MaterialStateProperty.resolveWith((Set<MaterialState> states) {
      if (states.contains(MaterialState.disabled)) {
        return SystemMouseCursors.basic;
      }
      return SystemMouseCursors.click;
    });

  @override
  VisualDensity? get visualDensity => Theme.of(context).visualDensity;

  @override
  MaterialTapTargetSize? get tapTargetSize => Theme.of(context).materialTapTargetSize;

  @override
  InteractiveInkFeatureFactory? get splashFactory => Theme.of(context).splashFactory;
}

// END GENERATED TOKEN PROPERTIES - FilledButton

// BEGIN GENERATED TOKEN PROPERTIES - FilledTonalButton

// Do not edit by hand. The code between the "BEGIN GENERATED" and
// "END GENERATED" comments are generated from data in the Material
// Design token database by the script:
//   dev/tools/gen_defaults/bin/gen_defaults.dart.

class _FilledTonalButtonDefaultsM3 extends ButtonStyle {
  _FilledTonalButtonDefaultsM3(this.context)
   : super(
       animationDuration: kThemeChangeDuration,
       enableFeedback: true,
       alignment: Alignment.center,
     );

  final BuildContext context;
  late final ColorScheme _colors = Theme.of(context).colorScheme;

  @override
  MaterialStateProperty<TextStyle?> get textStyle =>
    MaterialStatePropertyAll<TextStyle?>(Theme.of(context).textTheme.labelLarge);

  @override
  MaterialStateProperty<Color?>? get backgroundColor =>
    MaterialStateProperty.resolveWith((Set<MaterialState> states) {
      if (states.contains(MaterialState.disabled)) {
        return _colors.onSurface.withOpacity(0.12);
      }
      return _colors.secondaryContainer;
    });

  @override
  MaterialStateProperty<Color?>? get foregroundColor =>
    MaterialStateProperty.resolveWith((Set<MaterialState> states) {
      if (states.contains(MaterialState.disabled)) {
        return _colors.onSurface.withOpacity(0.38);
      }
      return _colors.onSecondaryContainer;
    });

  @override
  MaterialStateProperty<Color?>? get overlayColor =>
    MaterialStateProperty.resolveWith((Set<MaterialState> states) {
      if (states.contains(MaterialState.pressed)) {
        return _colors.onSecondaryContainer.withOpacity(0.12);
      }
      if (states.contains(MaterialState.hovered)) {
        return _colors.onSecondaryContainer.withOpacity(0.08);
      }
      if (states.contains(MaterialState.focused)) {
        return _colors.onSecondaryContainer.withOpacity(0.12);
      }
      return null;
    });

  @override
  MaterialStateProperty<Color>? get shadowColor =>
    MaterialStatePropertyAll<Color>(_colors.shadow);

  @override
  MaterialStateProperty<Color>? get surfaceTintColor =>
    const MaterialStatePropertyAll<Color>(Colors.transparent);

  @override
  MaterialStateProperty<double>? get elevation =>
    MaterialStateProperty.resolveWith((Set<MaterialState> states) {
      if (states.contains(MaterialState.disabled)) {
        return 0.0;
      }
      if (states.contains(MaterialState.pressed)) {
        return 0.0;
      }
      if (states.contains(MaterialState.hovered)) {
        return 1.0;
      }
      if (states.contains(MaterialState.focused)) {
        return 0.0;
      }
      return 0.0;
    });

  @override
  MaterialStateProperty<EdgeInsetsGeometry>? get padding =>
    MaterialStatePropertyAll<EdgeInsetsGeometry>(_scaledPadding(context));

  @override
  MaterialStateProperty<Size>? get minimumSize =>
    const MaterialStatePropertyAll<Size>(Size(64.0, 40.0));

  // No default fixedSize

  @override
  MaterialStateProperty<Size>? get maximumSize =>
    const MaterialStatePropertyAll<Size>(Size.infinite);

  // No default side

  @override
  MaterialStateProperty<OutlinedBorder>? get shape =>
    const MaterialStatePropertyAll<OutlinedBorder>(StadiumBorder());

  @override
  MaterialStateProperty<MouseCursor?>? get mouseCursor =>
    MaterialStateProperty.resolveWith((Set<MaterialState> states) {
      if (states.contains(MaterialState.disabled)) {
        return SystemMouseCursors.basic;
      }
      return SystemMouseCursors.click;
    });

  @override
  VisualDensity? get visualDensity => Theme.of(context).visualDensity;

  @override
  MaterialTapTargetSize? get tapTargetSize => Theme.of(context).materialTapTargetSize;

  @override
  InteractiveInkFeatureFactory? get splashFactory => Theme.of(context).splashFactory;
}

// END GENERATED TOKEN PROPERTIES - FilledTonalButton