100 lines
2.8 KiB
Dart
100 lines
2.8 KiB
Dart
import 'package:flutter/material.dart';
|
|
import 'package:material_symbols_icons/symbols.dart';
|
|
import '../../i18n/strings.g.dart';
|
|
import 'state_messages.dart';
|
|
|
|
/// Sliver wrapper around [ErrorStateWidget] for use in `CustomScrollView.slivers`.
|
|
class SliverErrorState extends StatelessWidget {
|
|
final String message;
|
|
final VoidCallback? onRetry;
|
|
final String? retryLabel;
|
|
|
|
const SliverErrorState({super.key, required this.message, this.onRetry, this.retryLabel});
|
|
|
|
@override
|
|
Widget build(BuildContext context) => SliverFillRemaining(
|
|
child: ErrorStateWidget(
|
|
message: message,
|
|
icon: Symbols.error_outline_rounded,
|
|
onRetry: onRetry,
|
|
retryLabel: retryLabel ?? t.common.retry,
|
|
),
|
|
);
|
|
}
|
|
|
|
/// Sliver wrapper around [EmptyStateWidget] for use in `CustomScrollView.slivers`.
|
|
class SliverEmptyState extends StatelessWidget {
|
|
final String message;
|
|
final IconData? icon;
|
|
final String? subtitle;
|
|
|
|
const SliverEmptyState({super.key, required this.message, required this.icon, this.subtitle});
|
|
|
|
@override
|
|
Widget build(BuildContext context) => SliverFillRemaining(
|
|
child: EmptyStateWidget(message: message, icon: icon, subtitle: subtitle),
|
|
);
|
|
}
|
|
|
|
/// A widget that handles loading, error, empty, and content states
|
|
/// Provides a consistent UI pattern across the app for data-driven screens
|
|
class ContentStateBuilder<T> extends StatelessWidget {
|
|
/// Whether data is currently loading
|
|
final bool isLoading;
|
|
|
|
/// Error message to display (null if no error)
|
|
final String? errorMessage;
|
|
|
|
/// The list of items to display
|
|
final List<T> items;
|
|
|
|
/// Icon to display when the list is empty
|
|
final IconData emptyIcon;
|
|
|
|
/// Message to display when the list is empty
|
|
final String emptyMessage;
|
|
|
|
/// Callback when user taps retry button
|
|
final VoidCallback onRetry;
|
|
|
|
/// Builder for the content when items are available
|
|
final Widget Function(List<T> items) builder;
|
|
|
|
const ContentStateBuilder({
|
|
super.key,
|
|
required this.isLoading,
|
|
required this.errorMessage,
|
|
required this.items,
|
|
required this.emptyIcon,
|
|
required this.emptyMessage,
|
|
required this.onRetry,
|
|
required this.builder,
|
|
});
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
// Loading state (only show loading indicator if items list is empty)
|
|
if (isLoading && items.isEmpty) {
|
|
return const Center(child: CircularProgressIndicator());
|
|
}
|
|
|
|
// Error state (only show error if items list is empty)
|
|
if (errorMessage != null && items.isEmpty) {
|
|
return ErrorStateWidget(
|
|
message: errorMessage!,
|
|
icon: Symbols.error_outline_rounded,
|
|
onRetry: onRetry,
|
|
retryLabel: t.common.retry,
|
|
);
|
|
}
|
|
|
|
// Empty state
|
|
if (items.isEmpty) {
|
|
return EmptyStateWidget(message: emptyMessage, icon: emptyIcon);
|
|
}
|
|
|
|
// Content state - delegate to builder
|
|
return builder(items);
|
|
}
|
|
}
|