108 lines
3.2 KiB
Dart
108 lines
3.2 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import 'package:go_router/go_router.dart';
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import 'package:lucide_icons_flutter/lucide_icons.dart';
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import '../state/timecards_controller.dart';
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import '../widgets/krow_nav_bar.dart';
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/// The five primary tabs. Each keeps its own navigation stack.
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class HomeShell extends ConsumerWidget {
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const HomeShell({super.key, required this.navigationShell});
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final StatefulNavigationShell navigationShell;
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@override
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Widget build(BuildContext context, WidgetRef ref) {
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final needsReview = ref.watch(timecardsNeedingReviewProvider).isNotEmpty;
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return Scaffold(
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body: _TabTransition(
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index: navigationShell.currentIndex,
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child: navigationShell,
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),
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bottomNavigationBar: KrowNavBar(
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currentIndex: navigationShell.currentIndex,
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onSelect: (i) => navigationShell.goBranch(
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i,
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initialLocation: i == navigationShell.currentIndex,
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),
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items: [
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const KrowNavItem(icon: LucideIcons.house, label: 'Today'),
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const KrowNavItem(icon: LucideIcons.briefcase, label: 'Shifts'),
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KrowNavItem(
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icon: LucideIcons.clock,
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label: 'Clock',
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showDot: needsReview,
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),
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const KrowNavItem(icon: LucideIcons.wallet, label: 'Pay'),
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const KrowNavItem(icon: LucideIcons.user, label: 'Profile'),
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],
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),
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);
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}
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}
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/// Fades and lifts the tab content each time the tab changes.
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///
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/// Deliberately not an AnimatedSwitcher: that would hold two copies of the
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/// shell in the tree at once, and the branch navigators are keyed by
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/// GlobalKey, so duplicating them would throw. This keeps one subtree — the
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/// branches stay alive and keep their scroll positions — and animates it in
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/// place when the index changes.
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class _TabTransition extends StatefulWidget {
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const _TabTransition({required this.index, required this.child});
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final int index;
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final Widget child;
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@override
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State<_TabTransition> createState() => _TabTransitionState();
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}
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class _TabTransitionState extends State<_TabTransition>
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with SingleTickerProviderStateMixin {
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late final AnimationController _controller = AnimationController(
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vsync: this,
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duration: const Duration(milliseconds: 260),
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value: 1,
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);
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late final Animation<double> _curve = CurvedAnimation(
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parent: _controller,
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curve: Curves.easeOutCubic,
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);
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@override
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void didUpdateWidget(_TabTransition oldWidget) {
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super.didUpdateWidget(oldWidget);
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if (oldWidget.index != widget.index) _controller.forward(from: 0);
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}
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@override
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void dispose() {
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_controller.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return AnimatedBuilder(
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animation: _curve,
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// The shell is passed through untouched so it is never rebuilt.
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child: widget.child,
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builder: (context, child) {
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final t = _curve.value;
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return Opacity(
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// Never fully transparent: a tab that blinks out reads as a glitch.
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opacity: 0.35 + 0.65 * t,
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child: Transform.translate(
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offset: Offset(0, (1 - t) * 10),
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child: child,
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),
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);
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},
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);
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}
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}
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