70 lines
2 KiB
Dart
70 lines
2 KiB
Dart
import 'package:flutter/material.dart';
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import 'collections_screen.dart';
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import 'scan_tab.dart';
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import 'profile_screen.dart';
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/// Bottom-navigation shell that hosts the three main tabs.
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class HomeShell extends StatefulWidget {
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const HomeShell({super.key});
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@override
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State<HomeShell> createState() => _HomeShellState();
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}
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class _HomeShellState extends State<HomeShell> {
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int _currentIndex = 0;
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final _collectionsKey = GlobalKey<CollectionsScreenState>();
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final _scanKey = GlobalKey<ScanTabState>();
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final Map<int, DateTime> _lastRefreshed = {};
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static const _refreshDebounce = Duration(seconds: 30);
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late final List<Widget> _pages = <Widget>[
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CollectionsScreen(key: _collectionsKey),
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ScanTab(key: _scanKey),
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const ProfileScreen(),
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];
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void _onTabSelected(int i) {
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setState(() => _currentIndex = i);
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final now = DateTime.now();
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final last = _lastRefreshed[i];
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if (last != null && now.difference(last) < _refreshDebounce) return;
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_lastRefreshed[i] = now;
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if (i == 0) {
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_collectionsKey.currentState?.refresh();
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} else if (i == 1) {
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_scanKey.currentState?.refresh();
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}
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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body: IndexedStack(
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index: _currentIndex,
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children: _pages,
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),
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bottomNavigationBar: NavigationBar(
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selectedIndex: _currentIndex,
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onDestinationSelected: _onTabSelected,
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destinations: const [
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NavigationDestination(
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icon: Icon(Icons.collections_bookmark_outlined),
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selectedIcon: Icon(Icons.collections_bookmark),
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label: 'Collections',
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),
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NavigationDestination(
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icon: Icon(Icons.qr_code_scanner_outlined),
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selectedIcon: Icon(Icons.qr_code_scanner),
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label: 'Scan',
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),
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NavigationDestination(
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icon: Icon(Icons.person_outline),
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selectedIcon: Icon(Icons.person),
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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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}
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