edde746
c38f24aee9
Hub moves, focus flips and item selects now flow through the rail focus model + ListenableSelectors (two headers/cards repaint instead of every visible card rebuilding). DiscoverScreen memoizes the hubs list, gates provider notifies on a render signature and caches the rail widget so no-op refreshes skip the subtree entirely. The whole-rail 0.6 and inactive-row 0.7 AnimatedOpacity layers are replaced by AnimatedDimScrim quads, removing the permanent per-frame saveLayers that kept low-end TV GPUs raster-bound.
41 lines
1.6 KiB
Dart
41 lines
1.6 KiB
Dart
import 'package:flutter/widgets.dart';
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import '../focus/focus_theme.dart';
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/// Dims the content beneath it by drawing a translucent [color] quad on top,
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/// as a saveLayer-free replacement for wrapping the content in
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/// [AnimatedOpacity]. Widget opacity below 1.0 forces an offscreen render
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/// pass every frame — a permanent GPU cost on the weak GLES devices most
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/// Android TVs are — while a color-blended quad is free. Over a
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/// [color]-colored underlay the result is mathematically identical to
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/// `Opacity(opacity: 1 - alpha)`; over artwork it darkens toward [color]
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/// instead of turning translucent.
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///
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/// Stack this above the content (with `IgnorePointer` built in so taps pass
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/// through). Animates with [FocusTheme.getAnimationDuration], so the full
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/// tier fades and the reduced tier snaps, matching the [AnimatedOpacity]
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/// behavior it replaces.
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class AnimatedDimScrim extends StatelessWidget {
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const AnimatedDimScrim({super.key, required this.dimmed, required this.color, required this.alpha});
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final bool dimmed;
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final Color color;
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/// Scrim strength while [dimmed]; visually equivalent to
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/// `Opacity(opacity: 1 - alpha)` over a [color] underlay.
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final double alpha;
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@override
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Widget build(BuildContext context) {
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return IgnorePointer(
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child: TweenAnimationBuilder<double>(
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tween: Tween(end: dimmed ? alpha : 0.0),
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duration: FocusTheme.getAnimationDuration(context),
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curve: Curves.easeOutCubic,
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builder: (context, value, _) =>
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value == 0 ? const SizedBox.shrink() : ColoredBox(color: color.withValues(alpha: value)),
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),
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);
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}
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}
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