138 lines
4.3 KiB
Dart
138 lines
4.3 KiB
Dart
import 'package:aves/model/entry.dart';
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import 'package:aves/model/source/collection_lens.dart';
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import 'package:aves/widgets/common/magnifier/pan/gesture_detector_scope.dart';
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import 'package:aves/widgets/common/magnifier/pan/scroll_physics.dart';
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import 'package:aves/widgets/viewer/multipage/conductor.dart';
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import 'package:aves/widgets/viewer/page_entry_builder.dart';
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import 'package:aves/widgets/viewer/visual/entry_page_view.dart';
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import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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class MultiEntryScroller extends StatefulWidget {
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final CollectionLens collection;
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final PageController pageController;
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final ValueChanged<int> onPageChanged;
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final void Function(AvesEntry mainEntry, AvesEntry? pageEntry) onViewDisposed;
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const MultiEntryScroller({
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Key? key,
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required this.collection,
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required this.pageController,
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required this.onPageChanged,
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required this.onViewDisposed,
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}) : super(key: key);
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@override
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State<StatefulWidget> createState() => _MultiEntryScrollerState();
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}
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class _MultiEntryScrollerState extends State<MultiEntryScroller> with AutomaticKeepAliveClientMixin {
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List<AvesEntry> get entries => widget.collection.sortedEntries;
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PageController get pageController => widget.pageController;
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@override
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Widget build(BuildContext context) {
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super.build(context);
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return MagnifierGestureDetectorScope(
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axis: const [Axis.horizontal, Axis.vertical],
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child: PageView.builder(
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// key is expected by test driver
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key: const Key('horizontal-pageview'),
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scrollDirection: Axis.horizontal,
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controller: pageController,
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physics: const MagnifierScrollerPhysics(parent: BouncingScrollPhysics()),
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onPageChanged: widget.onPageChanged,
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itemBuilder: (context, index) {
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final mainEntry = entries[index];
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var child = mainEntry.isMultiPage
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? PageEntryBuilder(
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multiPageController: context.read<MultiPageConductor>().getController(mainEntry),
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builder: (pageEntry) => _buildViewer(mainEntry, pageEntry: pageEntry),
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)
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: _buildViewer(mainEntry);
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child = AnimatedBuilder(
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animation: pageController,
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builder: (context, child) {
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// parallax scrolling
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double dx = 0;
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if (pageController.hasClients && pageController.position.haveDimensions) {
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final delta = pageController.page! - index;
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dx = delta * pageController.position.viewportDimension / 2;
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}
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return Transform.translate(
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offset: Offset(dx, 0),
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child: child,
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);
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},
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child: child,
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);
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return ClipRect(
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child: child,
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);
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},
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itemCount: entries.length,
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),
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);
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}
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Widget _buildViewer(AvesEntry mainEntry, {AvesEntry? pageEntry}) {
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return EntryPageView(
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// key is expected by test driver
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key: const Key('image_view'),
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mainEntry: mainEntry,
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pageEntry: pageEntry ?? mainEntry,
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onDisposed: () => widget.onViewDisposed(mainEntry, pageEntry),
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);
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}
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@override
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bool get wantKeepAlive => true;
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}
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class SingleEntryScroller extends StatefulWidget {
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final AvesEntry entry;
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const SingleEntryScroller({
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Key? key,
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required this.entry,
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}) : super(key: key);
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@override
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State<StatefulWidget> createState() => _SingleEntryScrollerState();
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}
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class _SingleEntryScrollerState extends State<SingleEntryScroller> with AutomaticKeepAliveClientMixin {
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AvesEntry get mainEntry => widget.entry;
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@override
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Widget build(BuildContext context) {
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super.build(context);
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var child = mainEntry.isMultiPage
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? PageEntryBuilder(
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multiPageController: context.read<MultiPageConductor>().getController(mainEntry),
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builder: (pageEntry) => _buildViewer(pageEntry: pageEntry),
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)
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: _buildViewer();
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return MagnifierGestureDetectorScope(
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axis: const [Axis.vertical],
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child: child,
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);
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}
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Widget _buildViewer({AvesEntry? pageEntry}) {
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return EntryPageView(
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mainEntry: mainEntry,
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pageEntry: pageEntry ?? mainEntry,
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);
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}
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@override
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bool get wantKeepAlive => true;
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}
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