flutter-freaccess-hub/lib/shared/mixins/pageable_mixin.dart

99 lines
3.2 KiB
Dart

import 'package:flutter/material.dart';
import 'package:hub/flutter_flow/index.dart';
import 'package:hub/shared/utils/limited_text_size.dart';
import 'package:infinite_scroll_pagination/infinite_scroll_pagination.dart';
extension PagedListViewExtension<PageKeyType, ItemType>
on PagedSliverList<PageKeyType, ItemType> {}
mixin Pageable<T extends StatefulWidget> on State<T> {
Expanded buildPaginatedListView<X, Y>(
String noDataFound,
PagingController<X, Y> pg,
Widget Function(BuildContext, Y, int) itemBuilder) {
final theme = FlutterFlowTheme.of(context);
return Expanded(
child: RefreshIndicator(
backgroundColor: theme.primaryBackground,
color: theme.primary,
onRefresh: () async => pg.refresh(),
child: PagedListView<X, Y>(
pagingController: pg,
builderDelegate: PagedChildBuilderDelegate<Y>(
animateTransitions: true,
itemBuilder: (context, item, index) =>
itemBuilder(context, item, index),
// noMoreItemsIndicatorBuilder: ,
newPageProgressIndicatorBuilder: (context) =>
buildLoadingIndicator(context),
firstPageProgressIndicatorBuilder: (context) =>
buildLoadingIndicator(context),
noItemsFoundIndicatorBuilder: (context) =>
buildNoDataFound(context, noDataFound),
// firstPageErrorIndicatorBuilder: (context) => const Placeholder(),
// newPageErrorIndicatorBuilder: (context) => const Placeholder(),
),
),
),
);
}
Future<void> fetchPage({
required Future<(bool, dynamic)> Function() dataProvider,
required void Function(dynamic data) onDataAvailable,
required void Function(dynamic data) onDataUnavailable,
required void Function(Object error, StackTrace stackTrace) onFetchError,
}) async {
try {
final (bool isDataAvailable, dynamic data) = await dataProvider();
if (isDataAvailable) {
onDataAvailable(data);
} else {
onDataUnavailable(data);
}
} catch (error, stackTrace) {
onFetchError(error, stackTrace);
}
}
void showNoMoreDataSnackBar(BuildContext context) {
final message = FFLocalizations.of(context).getVariableText(
ptText: "Não há mais dados.",
enText: "No more data.",
);
showSnackbarMessenger(context, message, true);
}
Widget buildNoDataFound(BuildContext context, String title) {
final headerFontSize = LimitedFontSizeUtil.getHeaderFontSize(context);
// final bodyFontSize = LimitedFontSizeUtil.getBodyFontSize(context);
return Expanded(
child: Center(
child: Text(
title,
style: TextStyle(
fontFamily: 'Nunito',
fontSize: headerFontSize,
),
),
),
);
}
Widget buildLoadingIndicator(BuildContext context) {
return Container(
padding: const EdgeInsets.symmetric(vertical: 15),
child: Center(
child: CircularProgressIndicator(
valueColor: AlwaysStoppedAnimation<Color>(
FlutterFlowTheme.of(context).primary,
),
),
),
);
}
}