73 lines
2.4 KiB
Dart
73 lines
2.4 KiB
Dart
import 'package:didvan/models/enums.dart';
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import 'package:didvan/providers/core.dart';
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import 'package:didvan/views/widgets/state_handlers/empty_connection.dart';
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import 'package:flutter/material.dart';
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class SliverStateHandler<T extends CoreProvier> extends SliverList {
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final T state;
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final Widget Function(BuildContext context, T state, int index) builder;
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final int childCount;
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final VoidCallback onRetry;
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final bool enableEmptyState;
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final Widget? emptyState;
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final Widget? placeholder;
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final EdgeInsets? itemPadding;
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final bool centerEmptyState;
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final bool hasConstraints;
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SliverStateHandler({
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Key? key,
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required this.state,
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required this.builder,
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required this.childCount,
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required this.onRetry,
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this.itemPadding,
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this.placeholder,
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this.emptyState,
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this.enableEmptyState = false,
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this.centerEmptyState = true,
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this.hasConstraints = false,
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}) : super(
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key: key,
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delegate: SliverChildBuilderDelegate(
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(context, index) {
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final deviceHight = MediaQuery.of(context).size.height;
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if (state.appState == AppState.failed) {
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return Padding(
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padding: EdgeInsets.only(
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top: centerEmptyState ? deviceHight / 4 : deviceHight / 8,
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bottom: 20,
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),
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child: EmptyConnection(onRetry: onRetry),
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);
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}
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if (enableEmptyState && state.appState == AppState.idle) {
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return Padding(
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padding: EdgeInsets.only(
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top: centerEmptyState ? deviceHight / 4 : deviceHight / 8,
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bottom: 20,
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),
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child: emptyState,
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);
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}
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if (state.appState == AppState.busy) {
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return Padding(
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padding: itemPadding ?? const EdgeInsets.all(0),
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child: placeholder,
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);
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}
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return Padding(
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padding: itemPadding ?? const EdgeInsets.all(0),
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child: builder(context, state, index),
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);
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},
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childCount: state.appState == AppState.idle
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? enableEmptyState
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? 1
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: childCount
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: state.appState == AppState.busy
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? 3
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: 1,
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),
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);
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}
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