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photo_view_page.dart
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import 'package:flutter/material.dart';
import 'package:photo_view_x/photo_view_x.dart';
class PhotoViewPage extends StatefulWidget {
final String curAssetUrl;
final List<String> assets;
const PhotoViewPage(
{Key? key, required this.curAssetUrl, required this.assets})
: super(key: key);
@override
State<PhotoViewPage> createState() => PhotoViewPageState();
}
class PhotoViewPageState extends State<PhotoViewPage> {
final ValueNotifier<int> _initialPage = ValueNotifier(0);
@override
void initState() {
super.initState();
int initialPage = widget.assets.indexOf(widget.curAssetUrl);
if (_initialPage.value != initialPage) {
_initialPage.value = initialPage;
}
}
@override
Widget build(BuildContext context) {
return PhotoScaffold(
appBar: AppBar(
title: ValueListenableBuilder(
valueListenable: _initialPage,
builder: (BuildContext context, int value, Widget? child) {
return Column(
children: [
if (widget.assets.isNotEmpty)
Text(
'${value + 1}/${widget.assets.length}',
style: const TextStyle(fontSize: 16),
)
],
);
},
),
),
body: _buildBody(),
// bottomSheet: _buildBottomSheet(),
);
}
Widget _buildBody() {
return PhotoPageView(
controller: SpacingPageController(
initialPage: _initialPage.value, pageSpacing: 30),
itemBuilder: (context, idx) => _itemBuilder(context, idx),
itemCount: widget.assets.length,
onPageChanged: (int page) => {_initialPage.value = page},
);
}
/*Widget? _buildBottomSheet() {
return Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
TextButton(
onPressed: () {},
child: const Text(
'delete',
style: TextStyle(fontSize: 14),
)),
TextButton(
onPressed: () {},
child: const Text(
'recover',
style: TextStyle(fontSize: 14),
))
],
);
}*/
Widget _itemBuilder(BuildContext context, int idx) {
var sys = MediaQuery.of(context);
var thumbnailView = sys.size.width * sys.devicePixelRatio;
var asset = widget.assets[idx];
return PhotoView(
tapEnabled: true,
child: Hero(
tag: asset,
transitionOnUserGestures: true,
child: Center(
child:
Image.asset(asset, fit: BoxFit.fitHeight, width: thumbnailView),
),
),
);
}
}