66 lines
2 KiB
Dart
66 lines
2 KiB
Dart
import 'package:aves/model/entry.dart';
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import 'package:aves/theme/durations.dart';
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import 'package:aves/utils/debouncer.dart';
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import 'package:aves/widgets/common/thumbnail/scroller.dart';
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import 'package:aves/widgets/viewer/overlay/notifications.dart';
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import 'package:flutter/material.dart';
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class ViewerThumbnailPreview extends StatefulWidget {
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final List<AvesEntry> entries;
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final int displayedIndex;
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final double availableWidth;
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const ViewerThumbnailPreview({
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Key? key,
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required this.entries,
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required this.displayedIndex,
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required this.availableWidth,
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}) : super(key: key);
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@override
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_ViewerThumbnailPreviewState createState() => _ViewerThumbnailPreviewState();
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}
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class _ViewerThumbnailPreviewState extends State<ViewerThumbnailPreview> {
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final ValueNotifier<int> _entryIndexNotifier = ValueNotifier(0);
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final Debouncer _debouncer = Debouncer(delay: Durations.viewerThumbnailScrollDebounceDelay);
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List<AvesEntry> get entries => widget.entries;
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int get entryCount => entries.length;
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@override
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void initState() {
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super.initState();
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_entryIndexNotifier.value = widget.displayedIndex;
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_entryIndexNotifier.addListener(_onScrollerIndexChange);
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}
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@override
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void didUpdateWidget(covariant ViewerThumbnailPreview oldWidget) {
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super.didUpdateWidget(oldWidget);
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if (oldWidget.displayedIndex != widget.displayedIndex) {
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_entryIndexNotifier.value = widget.displayedIndex;
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}
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}
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@override
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void dispose() {
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_entryIndexNotifier.removeListener(_onScrollerIndexChange);
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return ThumbnailScroller(
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availableWidth: widget.availableWidth,
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entryCount: entryCount,
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entryBuilder: (index) => 0 <= index && index < entryCount ? entries[index] : null,
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indexNotifier: _entryIndexNotifier,
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onTap: (index) => ViewEntryNotification(index: index).dispatch(context),
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);
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}
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void _onScrollerIndexChange() => _debouncer(() => ViewEntryNotification(index: _entryIndexNotifier.value).dispatch(context));
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}
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