water-management-system/mobile/lib/widgets/empty_state.dart

import 'package:flutter/material.dart';

/// 空状态占位组件
class EmptyState extends StatelessWidget {
  final IconData icon;
  final String title;
  final String? subtitle;
  final Widget? action;

  const EmptyState({
    super.key,
    this.icon = Icons.inbox_outlined,
    required this.title,
    this.subtitle,
    this.action,
  });

  @override
  Widget build(BuildContext context) {
    return Center(
      child: Padding(
        padding: const EdgeInsets.all(32),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            Icon(icon, size: 64, color: Colors.grey.shade400),
            const SizedBox(height: 16),
            Text(title, style: TextStyle(fontSize: 16, color: Colors.grey.shade700)),
            if (subtitle != null) ...[
              const SizedBox(height: 8),
              Text(subtitle!, style: TextStyle(fontSize: 13, color: Colors.grey.shade500)),
            ],
            if (action != null) ...[
              const SizedBox(height: 24),
              action!,
            ],
          ],
        ),
      ),
    );
  }
}