davide
8d25f63f24
- Comprimi icon-only.png da 5.2 MB a 72 KB (512×512, quantizzazione 256 colori) - Rimuovi setState() ridondante in ConverterPage.onChanged: search() chiama già notifyListeners() - Cattura pendingItems/checkedItems in variabili locali nel build di ShoppingListPage per evitare filtraggio ripetuto a ogni paint Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
382 lines
14 KiB
Dart
382 lines
14 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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import '../../models/conversion_entry.dart';
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import '../../providers/converter_provider.dart';
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import '../../../../shared/widgets/empty_state.dart';
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class ConverterPage extends StatefulWidget {
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const ConverterPage({super.key});
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@override
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State<ConverterPage> createState() => _ConverterPageState();
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}
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class _ConverterPageState extends State<ConverterPage> {
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final _searchController = TextEditingController();
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final _gramsController = TextEditingController();
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@override
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void dispose() {
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_searchController.dispose();
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_gramsController.dispose();
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super.dispose();
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}
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void _onSelect(ConversionEntry entry) {
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_searchController.clear();
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_gramsController.clear();
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context.read<ConverterProvider>().select(entry);
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}
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void _onReset() {
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_gramsController.clear();
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context.read<ConverterProvider>().reset();
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}
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void _onSwap() {
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_gramsController.clear();
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context.read<ConverterProvider>().swapDirection();
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}
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String _cap(String s) =>
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s.isEmpty ? s : s[0].toUpperCase() + s.substring(1);
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@override
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Widget build(BuildContext context) {
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final theme = Theme.of(context);
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final provider = context.watch<ConverterProvider>();
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return Column(
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crossAxisAlignment: CrossAxisAlignment.stretch,
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children: [
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Padding(
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padding: const EdgeInsets.fromLTRB(16, 56, 16, 8),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(
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'Convertitore',
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style: theme.textTheme.headlineSmall
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?.copyWith(fontWeight: FontWeight.bold),
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),
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Text(
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'Calcola il peso cotto dal crudo e viceversa',
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style: theme.textTheme.bodyMedium?.copyWith(
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color: theme.colorScheme.onSurface.withValues(alpha: 0.6),
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),
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),
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],
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),
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),
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Expanded(
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child: ListView(
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padding: const EdgeInsets.fromLTRB(16, 8, 16, 16),
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children: [
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if (provider.selected == null) ...[
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TextField(
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controller: _searchController,
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decoration: InputDecoration(
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hintText: 'Cerca alimento…',
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prefixIcon: const Icon(Icons.search),
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suffixIcon: _searchController.text.isNotEmpty
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? IconButton(
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icon: const Icon(Icons.clear),
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onPressed: () {
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_searchController.clear();
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context.read<ConverterProvider>().search('');
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},
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)
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: null,
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),
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onChanged: (v) {
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context.read<ConverterProvider>().search(v);
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},
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),
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if (provider.results.isNotEmpty) ...[
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const SizedBox(height: 8),
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Card(
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margin: EdgeInsets.zero,
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child: Column(
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children: [
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for (int i = 0; i < provider.results.length; i++) ...[
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if (i > 0) const Divider(height: 1),
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ListTile(
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title: Text(
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_cap(provider.results[i].food),
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style: const TextStyle(fontWeight: FontWeight.w600),
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),
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trailing: Text(
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_cap(provider.results[i].method),
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style: TextStyle(
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color: theme.colorScheme.onSurface
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.withValues(alpha: 0.55),
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fontSize: 13,
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),
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),
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onTap: () => _onSelect(provider.results[i]),
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dense: true,
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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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if (provider.results.isEmpty &&
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_searchController.text.isEmpty)
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const Padding(
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padding: EdgeInsets.only(top: 48),
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child: EmptyState(
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icon: Icons.search,
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title: 'Cerca un alimento per iniziare',
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subtitle: 'es. pollo, riso, zucchine',
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),
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),
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if (provider.results.isEmpty &&
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_searchController.text.isNotEmpty)
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const Padding(
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padding: EdgeInsets.only(top: 48),
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child: EmptyState(
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icon: Icons.search_off,
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title: 'Nessun risultato',
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),
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),
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],
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if (provider.selected != null)
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_ConverterCard(
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provider: provider,
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gramsController: _gramsController,
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onReset: _onReset,
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onSwap: _onSwap,
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onGramsChanged: (v) => context
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.read<ConverterProvider>()
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.setGrams(double.tryParse(v)),
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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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}
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}
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class _ConverterCard extends StatelessWidget {
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final ConverterProvider provider;
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final TextEditingController gramsController;
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final VoidCallback onReset;
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final VoidCallback onSwap;
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final void Function(String) onGramsChanged;
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const _ConverterCard({
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required this.provider,
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required this.gramsController,
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required this.onReset,
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required this.onSwap,
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required this.onGramsChanged,
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});
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String _cap(String s) =>
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s.isEmpty ? s : s[0].toUpperCase() + s.substring(1);
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@override
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Widget build(BuildContext context) {
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final theme = Theme.of(context);
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final selected = provider.selected!;
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final result = provider.result;
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final isRtC = provider.rawToCooked;
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final muted = theme.colorScheme.onSurface.withValues(alpha: 0.5);
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return Card(
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margin: EdgeInsets.zero,
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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// Header row
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Padding(
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padding: const EdgeInsets.fromLTRB(16, 4, 4, 4),
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child: Row(
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children: [
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Expanded(
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child: Wrap(
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crossAxisAlignment: WrapCrossAlignment.center,
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spacing: 4,
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children: [
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Text(
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_cap(selected.food),
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style: theme.textTheme.titleSmall
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?.copyWith(fontWeight: FontWeight.bold),
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),
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Text('·',
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style: TextStyle(
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color: theme.colorScheme.outline, fontSize: 16)),
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Text(
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_cap(selected.method),
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style: theme.textTheme.bodyMedium?.copyWith(color: muted),
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),
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],
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),
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),
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TextButton(onPressed: onReset, child: const Text('Cambia')),
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],
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),
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),
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const Divider(height: 1),
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// Calculator
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Padding(
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padding: const EdgeInsets.fromLTRB(16, 16, 16, 16),
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child: Row(
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crossAxisAlignment: CrossAxisAlignment.end,
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children: [
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// Input
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Expanded(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(
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isRtC ? 'CRUDO' : 'COTTO',
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style: theme.textTheme.labelSmall?.copyWith(
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fontWeight: FontWeight.w700,
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letterSpacing: 0.8,
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color: muted,
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),
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),
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const SizedBox(height: 4),
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Row(
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crossAxisAlignment: CrossAxisAlignment.baseline,
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textBaseline: TextBaseline.alphabetic,
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children: [
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Expanded(
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child: TextField(
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controller: gramsController,
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keyboardType:
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const TextInputType.numberWithOptions(
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decimal: true),
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style: theme.textTheme.headlineMedium
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?.copyWith(fontWeight: FontWeight.bold),
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decoration: const InputDecoration(
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hintText: '0',
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border: UnderlineInputBorder(),
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enabledBorder: UnderlineInputBorder(),
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focusedBorder: UnderlineInputBorder(),
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contentPadding: EdgeInsets.zero,
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),
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onChanged: onGramsChanged,
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),
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),
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const SizedBox(width: 4),
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Padding(
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padding: const EdgeInsets.only(bottom: 8),
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child: Text('g',
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style: theme.textTheme.titleMedium
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?.copyWith(color: muted)),
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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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// Swap button
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Padding(
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padding:
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const EdgeInsets.symmetric(horizontal: 10, vertical: 4),
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child: IconButton.outlined(
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onPressed: onSwap,
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icon: const Icon(Icons.swap_horiz),
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style: IconButton.styleFrom(
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minimumSize: const Size(44, 44)),
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),
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),
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// Output
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Expanded(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(
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isRtC ? 'COTTO' : 'CRUDO',
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style: theme.textTheme.labelSmall?.copyWith(
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fontWeight: FontWeight.w700,
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letterSpacing: 0.8,
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color: muted,
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),
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),
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const SizedBox(height: 4),
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Container(
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padding: const EdgeInsets.only(bottom: 8),
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decoration: BoxDecoration(
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border: Border(
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bottom: BorderSide(
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color: theme.colorScheme.outline
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.withValues(alpha: 0.4),
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),
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),
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),
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child: Row(
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crossAxisAlignment: CrossAxisAlignment.baseline,
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textBaseline: TextBaseline.alphabetic,
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children: [
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Expanded(
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child: Text(
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result != null
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? _formatResult(result)
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: '—',
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style: result != null
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? theme.textTheme.headlineMedium?.copyWith(
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fontWeight: FontWeight.bold,
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color: theme.colorScheme.primary,
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)
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: theme.textTheme.headlineMedium?.copyWith(
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color: theme.colorScheme.onSurface
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.withValues(alpha: 0.2),
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fontWeight: FontWeight.w300,
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),
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),
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),
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if (result != null) ...[
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const SizedBox(width: 4),
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Padding(
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padding: const EdgeInsets.only(bottom: 8),
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child: Text('g',
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style: theme.textTheme.titleMedium
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?.copyWith(color: muted)),
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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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),
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),
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],
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),
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),
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// Footer
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if (result != null)
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Container(
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width: double.infinity,
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padding: const EdgeInsets.fromLTRB(16, 8, 16, 12),
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decoration: BoxDecoration(
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border: Border(
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top: BorderSide(
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color: theme.colorScheme.outline.withValues(alpha: 0.2),
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),
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),
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),
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child: Text(
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'fattore di resa ${selected.yieldFactor} · '
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'${isRtC ? 'da mangiare cotti' : 'peso crudo equivalente'}',
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style: theme.textTheme.bodySmall?.copyWith(color: muted),
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textAlign: TextAlign.center,
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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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String _formatResult(double v) =>
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v == v.truncateToDouble() ? v.toInt().toString() : v.toString();
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}
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