lemmur-app-android/lib/pages/media_view.dart

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import 'package:cached_network_image/cached_network_image.dart';
import 'package:esys_flutter_share/esys_flutter_share.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:flutter_hooks/flutter_hooks.dart';
import 'package:photo_view/photo_view.dart';
import '../widgets/bottom_modal.dart';
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/// View to interact with a media object. Zoom in/out, download, share, etc.
class MediaViewPage extends HookWidget {
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final String url;
final GlobalKey<ScaffoldState> _key = GlobalKey();
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MediaViewPage(this.url);
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@override
Widget build(BuildContext context) {
final showButtons = useState(true);
final isZoomedOut = useState(true);
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notImplemented() {
_key.currentState.showSnackBar(SnackBar(
content: Text("this feature hasn't been implemented yet 😰")));
}
useEffect(() {
if (showButtons.value) {
SystemChrome.setEnabledSystemUIOverlays([
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SystemUiOverlay.bottom,
SystemUiOverlay.top,
]);
} else {
SystemChrome.setEnabledSystemUIOverlays([]);
}
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return null;
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}, [showButtons.value]);
useEffect(
() => () => SystemChrome.setEnabledSystemUIOverlays([
SystemUiOverlay.bottom,
SystemUiOverlay.top,
]),
[]);
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share() {
showModalBottomSheet(
backgroundColor: Colors.transparent,
context: context,
builder: (context) => BottomModal(
child: Column(
children: [
ListTile(
leading: Icon(Icons.link),
title: Text('Share link'),
onTap: () {
Navigator.of(context).pop();
Share.text('Share image url', url, 'text/plain');
},
),
ListTile(
leading: Icon(Icons.image),
title: Text('Share file'),
onTap: () {
Navigator.of(context).pop();
notImplemented();
// TODO: share file
},
),
],
),
),
);
}
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return Scaffold(
key: _key,
extendBodyBehindAppBar: true,
extendBody: true,
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appBar: showButtons.value
? AppBar(
backgroundColor: Colors.black38,
shadowColor: Colors.transparent,
leading: CloseButton(),
actions: [
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IconButton(
icon: Icon(Icons.share),
tooltip: 'share',
onPressed: share,
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),
IconButton(
icon: Icon(Icons.file_download),
tooltip: 'download',
onPressed: notImplemented,
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),
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],
)
: null,
body: GestureDetector(
onTapUp: (details) => showButtons.value = !showButtons.value,
onVerticalDragEnd: isZoomedOut.value
? (details) {
if (details.primaryVelocity.abs() > 1000) {
Navigator.of(context).pop();
}
}
: null,
child: PhotoView(
scaleStateChangedCallback: (value) {
isZoomedOut.value = value == PhotoViewScaleState.zoomedOut ||
value == PhotoViewScaleState.initial;
},
minScale: PhotoViewComputedScale.contained,
initialScale: PhotoViewComputedScale.contained,
imageProvider: CachedNetworkImageProvider(url),
heroAttributes: PhotoViewHeroAttributes(tag: url),
loadingBuilder: (context, event) =>
Center(child: CircularProgressIndicator()),
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),
),
);
}
}