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Frosted bottom bar: adjustable blur and opacity with Less/Default/More presets

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Settings > Appearance shows a preset control plus Blur and Opacity sliders
(new NooSlider) while frosted glass is on; values persist and feed
NooBottomBar.frostedBlur/frostedOpacity. Default matches the old fixed look.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
This commit is contained in:
Ayushya Amitabh
2026-10-06 19:46:54 -04:00
co-authored by Claude Sonnet 5.5
parent 0c063c1fb4
commit 0cda4a1241
10 changed files with 431 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/main.dart
+2
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@@ -564,6 +564,8 @@ class _MainShellViewState extends State<MainShellView> {
style: navStyle,
barStyle: bottomBarStyle,
frosted: settings.bottomBarFrosted,
frostedBlur: settings.bottomBarFrostedBlur,
frostedOpacity: settings.bottomBarFrostedOpacity,
tabs: pinnedTabs,
selectedIndex: pinnedIndex,
onSearchTap: showBottomBarSearch ? () => openSearch(context) : null,
lib/providers/settings_controller.dart
+66
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@@ -21,6 +21,30 @@ enum FabStyle { auto, mini, expanded }
/// animated wave with a tick-mark thumb ([squiggly]).
enum MediaProgressBarStyle { classic, wavy, slim, squiggly }
/// The frosted-glass bottom bar's blur sigma and surface opacity, in three
/// ready-made strengths (Settings, Appearance). Moving either slider off all
/// three leaves no preset selected (a custom mix).
enum FrostedGlassPreset {
less(blur: 10, opacity: 0.88, label: 'Less'),
standard(blur: 20, opacity: 0.72, label: 'Default'),
more(blur: 32, opacity: 0.55, label: 'More');
final double blur;
final double opacity;
final String label;
const FrostedGlassPreset({
required this.blur,
required this.opacity,
required this.label,
});
}
const double minFrostedBlur = 0;
const double maxFrostedBlur = 40;
const double minFrostedOpacity = 0.3;
const double maxFrostedOpacity = 1.0;
/// Global (not per-account) UI settings: theme, bottom-nav appearance, tab
/// configuration, swipe actions. Independent of login state - these mean
/// the same thing whether any account is signed in or not, unlike
@@ -39,6 +63,8 @@ class SettingsController extends ChangeNotifier {
static const _prefFabStyle = 'ui_fab_style';
static const _prefBottomBarStyle = 'ui_bottom_bar_style';
static const _prefBottomBarFrosted = 'ui_bottom_bar_frosted';
static const _prefFrostedBlur = 'ui_bottom_bar_frosted_blur';
static const _prefFrostedOpacity = 'ui_bottom_bar_frosted_opacity';
static const _prefNavMenuStyle = 'ui_nav_menu_style';
static const _prefSearchInBottomBar = 'ui_search_in_bottom_bar';
static const _prefAmoledDark = 'ui_amoled_dark';
@@ -53,6 +79,8 @@ class SettingsController extends ChangeNotifier {
NooBottomBarStyle _bottomBarStyle = NooBottomBarStyle.attached;
NooNavMenuStyle _navMenuStyle = NooNavMenuStyle.drawer;
bool _bottomBarFrosted = false;
double _frostedBlur = FrostedGlassPreset.standard.blur;
double _frostedOpacity = FrostedGlassPreset.standard.opacity;
bool _searchInBottomBar = false;
bool _useDynamicColor = true;
bool _amoledDark = false;
@@ -98,6 +126,14 @@ class SettingsController extends ChangeNotifier {
ThemeMode get themeMode => _themeMode;
NooBottomBarStyle get bottomBarStyle => _bottomBarStyle;
bool get bottomBarFrosted => _bottomBarFrosted;
double get bottomBarFrostedBlur => _frostedBlur;
double get bottomBarFrostedOpacity => _frostedOpacity;
/// The preset the current blur/opacity match exactly, or null when the
/// sliders have been moved to something custom.
FrostedGlassPreset? get frostedPreset => FrostedGlassPreset.values
.where((p) => p.blur == _frostedBlur && p.opacity == _frostedOpacity)
.firstOrNull;
NooNavMenuStyle get navMenuStyle => _navMenuStyle;
bool get searchInBottomBar => _searchInBottomBar;
bool get useDynamicColor => _useDynamicColor;
@@ -160,6 +196,15 @@ class SettingsController extends ChangeNotifier {
}
_bottomBarFrosted =
prefs.getBool(_prefBottomBarFrosted) ?? _bottomBarFrosted;
_frostedBlur = (prefs.getDouble(_prefFrostedBlur) ?? _frostedBlur).clamp(
minFrostedBlur,
maxFrostedBlur,
);
_frostedOpacity =
(prefs.getDouble(_prefFrostedOpacity) ?? _frostedOpacity).clamp(
minFrostedOpacity,
maxFrostedOpacity,
);
_searchInBottomBar =
prefs.getBool(_prefSearchInBottomBar) ?? _searchInBottomBar;
_useDynamicColor =
@@ -318,6 +363,27 @@ class SettingsController extends ChangeNotifier {
_prefsFuture.then((p) => p.setString(_prefBottomBarStyle, style.name));
}
void setFrostedBlur(double value) {
final v = value.clamp(minFrostedBlur, maxFrostedBlur);
if (_frostedBlur == v) return;
_frostedBlur = v;
notifyListeners();
_prefsFuture.then((p) => p.setDouble(_prefFrostedBlur, v));
}
void setFrostedOpacity(double value) {
final v = value.clamp(minFrostedOpacity, maxFrostedOpacity);
if (_frostedOpacity == v) return;
_frostedOpacity = v;
notifyListeners();
_prefsFuture.then((p) => p.setDouble(_prefFrostedOpacity, v));
}
void setFrostedPreset(FrostedGlassPreset preset) {
setFrostedBlur(preset.blur);
setFrostedOpacity(preset.opacity);
}
void setBottomBarFrosted(bool value) {
if (_bottomBarFrosted == value) return;
_bottomBarFrosted = value;
lib/widgets/bottom_nav_bar.dart
+6
View File
@@ -17,6 +17,8 @@ class BottomNavBar extends StatelessWidget {
final NooNavStyle style;
final NooBottomBarStyle barStyle;
final bool frosted;
final double frostedBlur;
final double frostedOpacity;
final List<AppTab> tabs;
final int selectedIndex;
final ValueChanged<int> onDestinationSelected;
@@ -27,6 +29,8 @@ class BottomNavBar extends StatelessWidget {
required this.style,
this.barStyle = NooBottomBarStyle.attached,
this.frosted = false,
this.frostedBlur = NooBottomBar.defaultFrostedBlur,
this.frostedOpacity = NooBottomBar.defaultFrostedOpacity,
required this.tabs,
required this.selectedIndex,
required this.onDestinationSelected,
@@ -39,6 +43,8 @@ class BottomNavBar extends StatelessWidget {
style: style,
barStyle: barStyle,
frosted: frosted,
frostedBlur: frostedBlur,
frostedOpacity: frostedOpacity,
destinations: [
for (final tab in tabs)
NooNavDestination(icon: tab.icon, label: tab.label),
lib/widgets/noo/core/noo_slider.dart
+51
View File
@@ -0,0 +1,51 @@
import 'package:flutter/material.dart';
import '../../../theme/design_tokens.dart';
/// A continuous (or [divisions]-stepped) value slider in the design system's
/// colors: accent fill on a `surface3` track, accent thumb. Data-agnostic -
/// the caller owns [value] and formats any readout beside it.
class NooSlider extends StatelessWidget {
final double value;
final double min;
final double max;
final int? divisions;
final ValueChanged<double>? onChanged;
final String? semanticLabel;
const NooSlider({
super.key,
required this.value,
required this.min,
required this.max,
this.divisions,
this.onChanged,
this.semanticLabel,
});
@override
Widget build(BuildContext context) {
final colors = context.nooColors;
return SliderTheme(
data: SliderTheme.of(context).copyWith(
trackHeight: 4,
activeTrackColor: colors.accent,
inactiveTrackColor: colors.surface3,
thumbColor: colors.accent,
overlayColor: colors.accent.withValues(alpha: 0.12),
thumbShape: const RoundSliderThumbShape(enabledThumbRadius: 9),
trackShape: const RoundedRectSliderTrackShape(),
showValueIndicator: ShowValueIndicator.never,
),
child: Slider(
value: value.clamp(min, max),
min: min,
max: max,
divisions: divisions,
semanticFormatterCallback: semanticLabel == null
? null
: (v) => '$semanticLabel ${v.toStringAsFixed(2)}',
onChanged: onChanged,
),
);
}
}
lib/widgets/noo/nav/noo_bottom_bar.dart
+28 -12
View File
@@ -14,11 +14,6 @@ const double _kFloatingPillTop = 8;
const double _kAndroidPillWidth = 56;
const double _kAndroidPillHeight = 32;
/// Frosted glass: the surface fill's opacity and the backdrop blur sigma -
/// the same sigma [FrostedGlassContainer] uses for the media viewer chrome.
const double _kFrostedAlpha = 0.72;
const double _kFrostedSigma = 20;
/// The mobile bottom bar (DESIGN_SYSTEM.md 3, "Mobile"; `iNav`/`aNav` in
/// `Mobile Screen.dc.html`). Shows the 5 pinned tabs - which ones, and in
/// what order, is the caller's business; this only draws [destinations].
@@ -71,6 +66,12 @@ class NooBottomBar extends StatelessWidget {
final NooNavStyle style;
final NooBottomBarStyle barStyle;
final bool frosted;
/// Backdrop blur sigma and surface-fill opacity while [frosted] (user-
/// adjustable in Settings; the defaults match [FrostedGlassContainer]'s
/// blur).
final double frostedBlur;
final double frostedOpacity;
final List<NooNavDestination> destinations;
final int selectedIndex;
final ValueChanged<int> onSelected;
@@ -82,6 +83,8 @@ class NooBottomBar extends StatelessWidget {
required this.style,
this.barStyle = NooBottomBarStyle.attached,
this.frosted = false,
this.frostedBlur = defaultFrostedBlur,
this.frostedOpacity = defaultFrostedOpacity,
required this.destinations,
required this.selectedIndex,
required this.onSelected,
@@ -99,6 +102,9 @@ class NooBottomBar extends StatelessWidget {
return barStyle == NooBottomBarStyle.floating ? 64 : 80;
}
static const double defaultFrostedBlur = 20;
static const double defaultFrostedOpacity = 0.72;
/// Whether the host `Scaffold` must draw its body behind the bar
/// (`extendBody`) - true for floating (its transparent margin) and for any
/// frosted bar (there's nothing to blur otherwise).
@@ -144,7 +150,9 @@ class NooBottomBar extends StatelessWidget {
),
child: row,
);
final pill = frosted ? _blurred(pillBox, pillRadius) : pillBox;
final pill = frosted
? _blurred(pillBox, pillRadius, frostedBlur)
: pillBox;
return SafeArea(
top: false,
child: Padding(
@@ -176,6 +184,8 @@ class NooBottomBar extends StatelessWidget {
onTap: onSearchTap!,
size: barHeight,
frosted: frosted,
frostedBlur: frostedBlur,
frostedOpacity: frostedOpacity,
),
],
),
@@ -195,11 +205,11 @@ class NooBottomBar extends StatelessWidget {
child: SizedBox(height: barHeight, child: row),
),
);
return frosted ? _blurred(bar, BorderRadius.zero) : bar;
return frosted ? _blurred(bar, BorderRadius.zero, frostedBlur) : bar;
}
Color _fill(NooColors colors) => frosted
? colors.surface.withValues(alpha: _kFrostedAlpha)
? colors.surface.withValues(alpha: frostedOpacity)
: colors.surface;
Widget _buildIosRow({NooNavDestination? trailingSearch}) {
@@ -286,10 +296,10 @@ class NooBottomBar extends StatelessWidget {
/// Clips [child] to [radius] and blurs whatever is drawn behind it - the
/// frosted bar's backdrop. [child] supplies the translucent fill on top.
Widget _blurred(Widget child, BorderRadius radius) => ClipRRect(
Widget _blurred(Widget child, BorderRadius radius, double sigma) => ClipRRect(
borderRadius: radius,
child: BackdropFilter(
filter: ImageFilter.blur(sigmaX: _kFrostedSigma, sigmaY: _kFrostedSigma),
filter: ImageFilter.blur(sigmaX: sigma, sigmaY: sigma),
child: child,
),
);
@@ -302,12 +312,16 @@ class _SearchSatellite extends StatelessWidget {
final VoidCallback onTap;
final double size;
final bool frosted;
final double frostedBlur;
final double frostedOpacity;
const _SearchSatellite({
required this.destination,
required this.onTap,
required this.size,
required this.frosted,
required this.frostedBlur,
required this.frostedOpacity,
});
@override
@@ -331,7 +345,7 @@ class _SearchSatellite extends StatelessWidget {
alignment: Alignment.center,
decoration: BoxDecoration(
color: frosted
? colors.surface.withValues(alpha: _kFrostedAlpha)
? colors.surface.withValues(alpha: frostedOpacity)
: colors.surface,
border: Border.all(color: colors.line),
shape: BoxShape.circle,
@@ -339,7 +353,9 @@ class _SearchSatellite extends StatelessWidget {
),
child: Icon(destination.icon, size: 24, color: colors.fg1),
);
return frosted ? _blurred(disc, BorderRadius.circular(size / 2)) : disc;
return frosted
? _blurred(disc, BorderRadius.circular(size / 2), frostedBlur)
: disc;
}
}
lib/widgets/settings/settings_appearance.dart
+113
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@@ -5,6 +5,7 @@ import '../../providers/settings_controller.dart';
import '../../theme/app_theme.dart';
import '../../theme/design_tokens.dart';
import '../noo/core/noo_segmented_control.dart';
import '../noo/core/noo_slider.dart';
import '../noo/core/noo_toggle.dart';
import '../noo/lists/noo_settings_row.dart';
import '../noo/nav/noo_nav_style.dart';
@@ -64,6 +65,7 @@ class SettingsAppearanceSection extends StatelessWidget {
onChanged: settings.setBottomBarFrosted,
),
),
if (settings.bottomBarFrosted) _FrostedGlassRow(settings: settings),
_NavMenuStyleRow(settings: settings),
NooSettingsRow(
icon: LucideIcons.search,
@@ -251,6 +253,117 @@ class _BottomBarStyleRow extends StatelessWidget {
}
}
/// How strong the frosted-glass bottom bar looks: three presets for a quick
/// pick, and the blur / opacity sliders they set, for anything in between.
/// Only shown while frosted glass is on.
class _FrostedGlassRow extends StatelessWidget {
final SettingsController settings;
const _FrostedGlassRow({required this.settings});
@override
Widget build(BuildContext context) {
final colors = context.nooColors;
return Material(
color: colors.surface,
child: Padding(
padding: const EdgeInsets.symmetric(
horizontal: NooSpace.md,
vertical: 12,
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(
children: [
Icon(LucideIcons.sparkles, size: 20, color: colors.fg2),
const SizedBox(width: 14),
Text(
'Frost strength',
style: NooText.bodyL.copyWith(color: colors.fg1),
),
],
),
const SizedBox(height: 12),
NooSegmentedControl<FrostedGlassPreset?>(
fill: true,
// No segment selected once the sliders no longer match a preset.
value: settings.frostedPreset,
onChanged: (preset) {
if (preset != null) settings.setFrostedPreset(preset);
},
options: [
for (final preset in FrostedGlassPreset.values)
NooSegmentOption<FrostedGlassPreset?>(
value: preset,
label: preset.label,
),
],
),
const SizedBox(height: 8),
_SliderLine(
label: 'Blur',
readout: settings.bottomBarFrostedBlur.round().toString(),
slider: NooSlider(
value: settings.bottomBarFrostedBlur,
min: minFrostedBlur,
max: maxFrostedBlur,
semanticLabel: 'Blur',
onChanged: settings.setFrostedBlur,
),
),
_SliderLine(
label: 'Opacity',
readout: '${(settings.bottomBarFrostedOpacity * 100).round()}%',
slider: NooSlider(
value: settings.bottomBarFrostedOpacity,
min: minFrostedOpacity,
max: maxFrostedOpacity,
semanticLabel: 'Opacity',
onChanged: settings.setFrostedOpacity,
),
),
],
),
),
);
}
}
class _SliderLine extends StatelessWidget {
final String label;
final String readout;
final Widget slider;
const _SliderLine({
required this.label,
required this.readout,
required this.slider,
});
@override
Widget build(BuildContext context) {
final colors = context.nooColors;
return Row(
children: [
SizedBox(
width: 64,
child: Text(label, style: NooText.body.copyWith(color: colors.fg2)),
),
Expanded(child: slider),
SizedBox(
width: 44,
child: Text(
readout,
textAlign: TextAlign.end,
style: NooText.body.copyWith(color: colors.fg3),
),
),
],
);
}
}
/// "Navigation menu" (Settings → Appearance): which widget opens hidden
/// tabs + Settings - the original `menu` icon that opens a left `Drawer`,
/// or the avatar button instead (opens `showAvatarMenu`, a dropdown