app_bar_template.dart 3.97 KB
Newer Older
1 2 3 4 5 6 7
// 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 'template.dart';

class AppBarTemplate extends TokenTemplate {
8
  const AppBarTemplate(super.blockName, super.fileName, super.tokens)
9 10 11 12 13 14 15
    : super(
      colorSchemePrefix: '_colors.',
      textThemePrefix: '_textTheme.',
    );

  @override
  String generate() => '''
16 17
class _${blockName}DefaultsM3 extends AppBarTheme {
  _${blockName}DefaultsM3(this.context)
18 19 20 21
    : super(
      elevation: ${elevation('md.comp.top-app-bar.small.container')},
      scrolledUnderElevation: ${elevation('md.comp.top-app-bar.small.on-scroll.container')},
      titleSpacing: NavigationToolbar.kMiddleSpacing,
22
      toolbarHeight: ${getToken('md.comp.top-app-bar.small.container.height')},
23 24 25 26 27 28 29 30 31 32 33 34 35 36
    );

  final BuildContext context;
  late final ThemeData _theme = Theme.of(context);
  late final ColorScheme _colors = _theme.colorScheme;
  late final TextTheme _textTheme = _theme.textTheme;

  @override
  Color? get backgroundColor => ${componentColor('md.comp.top-app-bar.small.container')};

  @override
  Color? get foregroundColor => ${color('md.comp.top-app-bar.small.headline.color')};

  @override
37 38 39 40
  Color? get shadowColor => ${colorOrTransparent('md.comp.top-app-bar.small.container.shadow-color')};

  @override
  Color? get surfaceTintColor => ${colorOrTransparent('md.comp.top-app-bar.small.container.surface-tint-layer.color')};
41 42 43 44

  @override
  IconThemeData? get iconTheme => IconThemeData(
    color: ${componentColor('md.comp.top-app-bar.small.leading-icon')},
45
    size: ${getToken('md.comp.top-app-bar.small.leading-icon.size')},
46 47 48 49 50
  );

  @override
  IconThemeData? get actionsIconTheme => IconThemeData(
    color: ${componentColor('md.comp.top-app-bar.small.trailing-icon')},
51
    size: ${getToken('md.comp.top-app-bar.small.trailing-icon.size')},
52 53 54
  );

  @override
55
  TextStyle? get toolbarTextStyle => _textTheme.bodyMedium;
56 57 58

  @override
  TextStyle? get titleTextStyle => ${textStyle('md.comp.top-app-bar.small.headline')};
59 60 61 62 63 64 65 66 67 68 69
}

// Variant configuration
class _MediumScrollUnderFlexibleConfig with _ScrollUnderFlexibleConfig {
  _MediumScrollUnderFlexibleConfig(this.context);

  final BuildContext context;
  late final ThemeData _theme = Theme.of(context);
  late final ColorScheme _colors = _theme.colorScheme;
  late final TextTheme _textTheme = _theme.textTheme;

70 71
  static const double collapsedHeight = ${getToken('md.comp.top-app-bar.small.container.height')};
  static const double expandedHeight = ${getToken('md.comp.top-app-bar.medium.container.height')};
72 73 74 75 76 77 78 79 80 81

  @override
  TextStyle? get collapsedTextStyle =>
    ${textStyle('md.comp.top-app-bar.small.headline')}?.apply(color: ${color('md.comp.top-app-bar.small.headline.color')});

  @override
  TextStyle? get expandedTextStyle =>
    ${textStyle('md.comp.top-app-bar.medium.headline')}?.apply(color: ${color('md.comp.top-app-bar.medium.headline.color')});

  @override
82
  EdgeInsetsGeometry get expandedTitlePadding => const EdgeInsets.fromLTRB(16, 0, 16, 20);
83 84 85 86 87 88 89 90 91 92
}

class _LargeScrollUnderFlexibleConfig with _ScrollUnderFlexibleConfig {
  _LargeScrollUnderFlexibleConfig(this.context);

  final BuildContext context;
  late final ThemeData _theme = Theme.of(context);
  late final ColorScheme _colors = _theme.colorScheme;
  late final TextTheme _textTheme = _theme.textTheme;

93 94
  static const double collapsedHeight = ${getToken('md.comp.top-app-bar.small.container.height')};
  static const double expandedHeight = ${getToken('md.comp.top-app-bar.large.container.height')};
95 96 97 98 99 100 101 102 103 104

  @override
  TextStyle? get collapsedTextStyle =>
    ${textStyle('md.comp.top-app-bar.small.headline')}?.apply(color: ${color('md.comp.top-app-bar.small.headline.color')});

  @override
  TextStyle? get expandedTextStyle =>
    ${textStyle('md.comp.top-app-bar.large.headline')}?.apply(color: ${color('md.comp.top-app-bar.large.headline.color')});

  @override
105
  EdgeInsetsGeometry get expandedTitlePadding => const EdgeInsets.fromLTRB(16, 0, 16, 28);
106 107
}
''';
108
}