Meal Planner

import 'package:flutter/material.dart';

const _meals = [
  {'day': 'Mon', 'breakfast': 'Oatmeal', 'lunch': 'Salad', 'dinner': 'Chicken'},
  {'day': 'Tue', 'breakfast': 'Eggs', 'lunch': 'Sandwich', 'dinner': 'Pasta'},
  {'day': 'Wed', 'breakfast': 'Smoothie', 'lunch': 'Soup', 'dinner': 'Fish'},
  {'day': 'Thu', 'breakfast': 'Toast', 'lunch': 'Wrap', 'dinner': 'Beef'},
  {'day': 'Fri', 'breakfast': 'Yogurt', 'lunch': 'Burrito', 'dinner': 'Pizza'},
];

class MealPlanner extends StatelessWidget {
  const MealPlanner({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Meal Planner')),
      body: ListView(
        padding: const EdgeInsets.all(16),
        children: [
          Card(
            clipBehavior: Clip.antiAlias,
            child: LayoutBuilder(
              builder: (context, constraints) => SingleChildScrollView(
                scrollDirection: Axis.horizontal,
                child: ConstrainedBox(
                  // Still fills the card on screens wide enough for the table.
                  constraints: BoxConstraints(minWidth: constraints.maxWidth),
                  child: DataTable(
                    headingRowColor: WidgetStateProperty.all(
                        Theme.of(context).colorScheme.surfaceContainerHighest),
                    columns: const [
                      DataColumn(label: Text('Day')),
                      DataColumn(label: Text('Breakfast')),
                      DataColumn(label: Text('Lunch')),
                      DataColumn(label: Text('Dinner')),
                    ],
                    rows: _meals
                        .map((m) => DataRow(
                              cells: [
                                DataCell(Text(m['day'] as String)),
                                DataCell(Text(m['breakfast'] as String)),
                                DataCell(Text(m['lunch'] as String)),
                                DataCell(Text(m['dinner'] as String)),
                              ],
                            ))
                        .toList(),
                  ),
                ),
              ),
            ),
          ),
          const SizedBox(height: 16),
          FilledButton.icon(
            onPressed: () => _showDemo(context, 'Add Day (demo)'),
            icon: const Icon(Icons.add),
            label: const Text('Add Day'),
            style: FilledButton.styleFrom(minimumSize: const Size(double.infinity, 48)),
          ),
        ],
      ),
    );
  }
}

void _showDemo(BuildContext context, String message) {
  ScaffoldMessenger.of(context)
    ..hideCurrentSnackBar()
    ..showSnackBar(SnackBar(content: Text(message)));
}