/
surface_blends.dart
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/
surface_blends.dart
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import 'package:flex_color_picker/flex_color_picker.dart';
import 'package:flex_color_scheme/flex_color_scheme.dart';
import 'package:flutter/material.dart';
import '../../../../shared/controllers/theme_controller.dart';
import '../../../../shared/widgets/universal/switch_list_tile_adaptive.dart';
import '../../shared/color_picker_inkwell.dart';
import '../../shared/color_scheme_popup_menu.dart';
import 'surface_mode_buttons.dart';
// Panel used to define how primary color is blended into surfaces and
// onColors.
class SurfaceBlends extends StatelessWidget {
const SurfaceBlends(
this.controller, {
super.key,
required this.allBlends,
});
final ThemeController controller;
final bool allBlends;
String explainMode(final FlexSurfaceMode mode) {
switch (mode) {
case FlexSurfaceMode.level:
return 'Flat blend\nAll surfaces at blend level 1x\n';
case FlexSurfaceMode.highBackgroundLowScaffold:
return 'High background, low scaffold\n'
'Background 3/2x Surface 1x Scaffold 1/2x\n';
case FlexSurfaceMode.highSurfaceLowScaffold:
return 'High surface, low scaffold\n'
'Surface 3/2x Background 1x Scaffold 1/2x\n';
case FlexSurfaceMode.highScaffoldLowSurface:
return 'High scaffold, low surface\n'
'Scaffold 3x Background 1x Surface 1/2x\n';
case FlexSurfaceMode.highScaffoldLevelSurface:
return 'High scaffold, level surface\n'
'Scaffold 3x Background 2x Surface 1x\n';
case FlexSurfaceMode.levelSurfacesLowScaffold:
return 'Level surfaces, low scaffold\n'
'Surface & Background 1x Scaffold 1/2x\n';
case FlexSurfaceMode.highScaffoldLowSurfaces:
return 'High scaffold, low surfaces (default)\n'
'Scaffold 3x Surface and Background 1/2x\n';
case FlexSurfaceMode.levelSurfacesLowScaffoldVariantDialog:
return 'Tertiary container dialog, low scaffold\n'
'Surface & Background 1x Scaffold 1/2x\n'
'Dialog 1x blend of tertiary container color';
case FlexSurfaceMode.highScaffoldLowSurfacesVariantDialog:
return 'High scaffold, tertiary container dialog\n'
'Scaffold 3x Surface and Background 1/2x\n'
'Dialog 1/2x blend of tertiary container color';
case FlexSurfaceMode.custom:
return '';
}
}
@override
Widget build(BuildContext context) {
final ThemeData theme = Theme.of(context);
final bool isLight = theme.brightness == Brightness.light;
final ColorScheme colorScheme = theme.colorScheme;
// Default color is in use, make a light label to use in custom color.
final String defaultTintLightLabel =
controller.surfaceTintLight == null ? ' primary (default):' : ':';
// Current light tint color
final Color? previousTintLight = controller.surfaceTintLight;
final Color effectiveTintLight =
controller.surfaceTintLight ?? colorScheme.surfaceTint;
// Names for the light tint colors.
final String materialNameLight =
ColorTools.materialName(effectiveTintLight);
final String nameThatColorLight =
ColorTools.nameThatColor(effectiveTintLight);
final String spaceLight = materialNameLight == '' ? '' : ' ';
// Default color is in use, make a dark label to use in custom color.
final String defaultTintDarkLabel =
controller.surfaceTintDark == null ? ' primary (default)' : '';
// Current dark tint color.
final Color? previousTintDark = controller.surfaceTintDark;
final Color effectiveTintDark =
controller.surfaceTintDark ?? colorScheme.surfaceTint;
// Names for the dark tint colors.
final String materialNameDark = ColorTools.materialName(effectiveTintDark);
final String nameThatColorDark =
ColorTools.nameThatColor(effectiveTintDark);
final String spaceDark = materialNameDark == '' ? '' : ' ';
//
return Column(
children: <Widget>[
const SizedBox(height: 8),
const ListTile(
title: Text('Blended surfaces and backgrounds'),
isThreeLine: true,
subtitle: Text(
'Material Design 2 guide briefly mentions using surfaces with '
'primary color alpha blends. FlexColorScheme surface blends '
'implements it.\n'
'\n'
'Material Design 3 has a new color system where a hint of primary '
'color is also used on surfaces. It is done via its neutral tonal '
'palettes that are shifted slightly towards the primary color. '
'If you use M3 seeded ColorSchemes and set blend level to zero, '
'you get the M3 design. With surface blends, you can further '
'strengthen the effect and vary blend levels by surface type.',
),
),
if (isLight) ...<Widget>[
ListTile(
title: const Text('Light theme blend mode'),
subtitle: Text(explainMode(controller.surfaceModeLight)),
),
Row(
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
SurfaceModeButtons(
mode: controller.surfaceModeLight,
onChanged: controller.setSurfaceModeLight,
showAllModes: allBlends,
),
const SizedBox(width: 16),
],
),
const SizedBox(height: 8),
ListTile(
enabled: controller.surfaceTintLight != null,
title: const Text('Set light blend and tint color back to default'),
subtitle: const Text('Sets custom blend and tint color back '
'to primary color'),
trailing: ElevatedButton(
onPressed: controller.surfaceTintLight != null
? () {
controller.setSurfaceTintLight(null);
}
: null,
child: const Text('Default'),
),
onTap: () {
controller.setSurfaceTintLight(null);
},
),
ColorPickerInkWell(
color: controller.surfaceTintLight ?? colorScheme.primary,
onChanged: controller.setSurfaceTintLight,
recentColors: controller.recentColors,
onRecentColorsChanged: controller.setRecentColors,
wasCancelled: (bool cancelled) {
if (cancelled) {
controller.setSurfaceTintLight(previousTintLight);
}
},
enabled: true,
child: ListTile(
title: const Text('Light theme blend and surface tint color'),
subtitle: Text('Color$defaultTintLightLabel '
'$nameThatColorLight $materialNameLight$spaceLight'
'#${effectiveTintLight.hexCode}'),
trailing: ColorSchemeBox(
color: controller.surfaceTintLight ?? colorScheme.primary,
),
),
),
const ListTile(
title: Text('Light theme blend level'),
subtitle: Text('Adjust the surface, background, scaffold and '
'dialog blend level. Also impacts surfaces when '
'seed colors are used. Seed based surfaces already include '
'a touch of primary, but you can make it stronger with '
'surface blends'),
),
ListTile(
title: Slider.adaptive(
min: 0,
max: 40,
divisions: 40,
label: controller.blendLevel.toString(),
value: controller.blendLevel.toDouble(),
onChanged: (double value) {
controller.setBlendLevel(value.toInt());
},
),
trailing: Padding(
padding: const EdgeInsetsDirectional.only(end: 12),
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Text(
'LEVEL',
style: Theme.of(context).textTheme.bodySmall,
),
Text(
'${controller.blendLevel}',
style: Theme.of(context)
.textTheme
.caption!
.copyWith(fontWeight: FontWeight.bold),
),
],
),
),
),
ListTile(
enabled: controller.useSubThemes && controller.useFlexColorScheme,
title: const Text('Light theme onColors blend level'),
subtitle: const Text('When seed colors are not used, this affects '
'onContainers, onSurface and onBackground, plus main '
'onColors when the onColor blending switch is ON'),
),
ListTile(
enabled: controller.useSubThemes && controller.useFlexColorScheme,
title: Slider.adaptive(
min: 0,
max: 40,
divisions: 40,
label: controller.blendOnLevel.toString(),
value: controller.useSubThemes && controller.useFlexColorScheme
? controller.blendOnLevel.toDouble()
: 0,
onChanged:
controller.useSubThemes && controller.useFlexColorScheme
? (double value) {
controller.setBlendOnLevel(value.toInt());
}
: null,
),
trailing: Padding(
padding: const EdgeInsetsDirectional.only(end: 12),
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Text(
'LEVEL',
style: Theme.of(context).textTheme.bodySmall,
),
Text(
// ignore: lines_longer_than_80_chars
'${controller.useSubThemes && controller.useFlexColorScheme ? controller.blendOnLevel : ""}',
style: Theme.of(context)
.textTheme
.caption!
.copyWith(fontWeight: FontWeight.bold),
),
],
),
),
),
SwitchListTileAdaptive(
title: const Text('Light theme main colors use onColor blending'),
subtitle:
const Text('In M3 design, only container colors use color '
'pair tinted onColor. Main colors use black or white. '
'Keep this OFF to do so. Set to ON to use it with '
'onPrimary, onSecondary, onTertiary and onError, when seed '
'colors are not used'),
value: controller.blendLightOnColors &&
controller.useSubThemes &&
controller.useFlexColorScheme,
onChanged: controller.useSubThemes && controller.useFlexColorScheme
? controller.setBlendLightOnColors
: null,
),
SwitchListTileAdaptive(
title: const Text('Plain white'),
subtitle: const Text(
'White Scaffold in all blend modes, '
'other surfaces become 5% lighter',
),
value: controller.lightIsWhite,
onChanged: controller.setLightIsWhite,
),
] else ...<Widget>[
ListTile(
title: const Text('Dark theme blend mode'),
subtitle: Text(explainMode(controller.surfaceModeDark)),
),
Row(
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
SurfaceModeButtons(
mode: controller.surfaceModeDark,
onChanged: controller.setSurfaceModeDark,
showAllModes: allBlends,
),
const SizedBox(width: 16),
],
),
const SizedBox(height: 8),
ListTile(
enabled: controller.surfaceTintDark != null,
title: const Text('Set dark blend and tint color back to default'),
subtitle: const Text('Sets custom blend and tint color back '
'to primary color'),
trailing: ElevatedButton(
onPressed: controller.surfaceTintDark != null
? () {
controller.setSurfaceTintDark(null);
}
: null,
child: const Text('Default'),
),
onTap: () {
controller.setSurfaceTintDark(null);
},
),
ColorPickerInkWell(
color: controller.surfaceTintDark ?? colorScheme.primary,
onChanged: controller.setSurfaceTintDark,
recentColors: controller.recentColors,
onRecentColorsChanged: controller.setRecentColors,
wasCancelled: (bool cancelled) {
if (cancelled) {
controller.setSurfaceTintDark(previousTintDark);
}
},
enabled: true,
child: ListTile(
title: const Text('Dark theme blend and surface tint color'),
subtitle: Text('Color$defaultTintDarkLabel '
'$nameThatColorDark $materialNameDark$spaceDark'
'#${effectiveTintDark.hexCode}'),
trailing: ColorSchemeBox(
color: controller.surfaceTintDark ?? colorScheme.primary,
),
),
),
const ListTile(
title: Text('Dark theme blend level'),
subtitle: Text('Adjust the surface, background, scaffold and '
'dialog blend level. Also impacts surfaces when '
'seed colors are used. Seed based surfaces already include '
'a touch of primary, but you can make it stronger with '
'surface blends'),
),
ListTile(
title: Slider.adaptive(
min: 0,
max: 40,
divisions: 40,
label: controller.blendLevelDark.toString(),
value: controller.blendLevelDark.toDouble(),
onChanged: (double value) {
controller.setBlendLevelDark(value.toInt());
},
),
trailing: Padding(
padding: const EdgeInsetsDirectional.only(end: 12),
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Text(
'LEVEL',
style: Theme.of(context).textTheme.bodySmall,
),
Text(
'${controller.blendLevelDark}',
style: Theme.of(context)
.textTheme
.caption!
.copyWith(fontWeight: FontWeight.bold),
),
],
),
),
),
ListTile(
enabled: controller.useSubThemes && controller.useFlexColorScheme,
title: const Text('Dark theme onColors blend level'),
subtitle: const Text('When seed colors are not used, this affects '
'onContainers, onSurface and onBackground, plus main '
'onColors when the onColor blending switch is ON'),
),
ListTile(
enabled: controller.useSubThemes && controller.useFlexColorScheme,
title: Slider.adaptive(
min: 0,
max: 40,
divisions: 40,
label: controller.blendOnLevelDark.toString(),
value: controller.useSubThemes && controller.useFlexColorScheme
? controller.blendOnLevelDark.toDouble()
: 0,
onChanged:
controller.useSubThemes && controller.useFlexColorScheme
? (double value) {
controller.setBlendOnLevelDark(value.toInt());
}
: null,
),
trailing: Padding(
padding: const EdgeInsetsDirectional.only(end: 12),
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Text(
'LEVEL',
style: Theme.of(context).textTheme.bodySmall,
),
Text(
// ignore: lines_longer_than_80_chars
'${controller.useSubThemes && controller.useFlexColorScheme ? controller.blendOnLevelDark : ""}',
style: Theme.of(context)
.textTheme
.caption!
.copyWith(fontWeight: FontWeight.bold),
),
],
),
),
),
SwitchListTileAdaptive(
title: const Text('Dark theme main colors use onColor blending'),
subtitle: const Text(
'In M3 dark design, not only container colors use '
'color pair tinted onColor, but also main colors do. '
'Keep this ON to also use it with onPrimary, onSecondary, '
'onTertiary and onError colors in dark mode, when seed colors '
'are not used'),
value: controller.blendDarkOnColors &&
controller.useSubThemes &&
controller.useFlexColorScheme,
onChanged: controller.useSubThemes && controller.useFlexColorScheme
? controller.setBlendDarkOnColors
: null,
),
SwitchListTileAdaptive(
title: const Text('True black'),
subtitle: const Text(
'Black Scaffold in all blend modes, '
'other surfaces become 5% darker',
),
value: controller.darkIsTrueBlack,
onChanged: controller.setDarkIsTrueBlack,
),
],
],
);
}
}