117 lines
3.2 KiB
Dart
117 lines
3.2 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:matrix/matrix.dart';
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import 'package:fluffychat/config/themes.dart';
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import 'package:fluffychat/pages/image_viewer/image_viewer_view.dart';
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import 'package:fluffychat/utils/platform_infos.dart';
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import 'package:fluffychat/utils/show_scaffold_dialog.dart';
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import 'package:fluffychat/widgets/share_scaffold_dialog.dart';
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import '../../utils/matrix_sdk_extensions/event_extension.dart';
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class ImageViewer extends StatefulWidget {
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final Event event;
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final Timeline? timeline;
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final BuildContext outerContext;
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const ImageViewer(
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this.event, {
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required this.outerContext,
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this.timeline,
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super.key,
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});
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@override
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ImageViewerController createState() => ImageViewerController();
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}
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class ImageViewerController extends State<ImageViewer> {
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final FocusNode focusNode = FocusNode();
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@override
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void initState() {
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super.initState();
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allEvents = widget.timeline?.events
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.where((event) => event.messageType == MessageTypes.Image)
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.toList()
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.reversed
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.toList() ??
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[widget.event];
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var index =
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allEvents.indexWhere((event) => event.eventId == widget.event.eventId);
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if (index < 0) index = 0;
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pageController = PageController(initialPage: index);
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}
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late final PageController pageController;
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late final List<Event> allEvents;
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void onKeyEvent(KeyEvent event) {
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switch (event.logicalKey) {
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case LogicalKeyboardKey.arrowLeft:
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if (canGoBack) prevImage();
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break;
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case LogicalKeyboardKey.arrowRight:
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if (canGoNext) nextImage();
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break;
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}
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}
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void prevImage() async {
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await pageController.previousPage(
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duration: FluffyThemes.animationDuration,
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curve: FluffyThemes.animationCurve,
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);
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if (!mounted) return;
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setState(() {});
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}
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void nextImage() async {
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await pageController.nextPage(
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duration: FluffyThemes.animationDuration,
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curve: FluffyThemes.animationCurve,
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);
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if (!mounted) return;
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setState(() {});
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}
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int get _index => pageController.page?.toInt() ?? 0;
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Event get currentEvent => allEvents[_index];
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bool get canGoNext => _index < allEvents.length - 1;
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bool get canGoBack => _index > 0;
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/// Forward this image to another room.
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void forwardAction() => showScaffoldDialog(
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context: context,
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builder: (context) => ShareScaffoldDialog(
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items: [ContentShareItem(currentEvent.content)],
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),
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);
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/// Save this file with a system call.
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void saveFileAction(BuildContext context) => currentEvent.saveFile(context);
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/// Save this file with a system call.
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void shareFileAction(BuildContext context) => currentEvent.shareFile(context);
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static const maxScaleFactor = 1.5;
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/// Go back if user swiped it away
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void onInteractionEnds(ScaleEndDetails endDetails) {
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if (PlatformInfos.usesTouchscreen == false) {
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if (endDetails.velocity.pixelsPerSecond.dy >
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MediaQuery.of(context).size.height * maxScaleFactor) {
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Navigator.of(context, rootNavigator: false).pop();
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}
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}
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}
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@override
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Widget build(BuildContext context) => ImageViewerView(this);
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}
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