87 lines
2.5 KiB
Dart
87 lines
2.5 KiB
Dart
import 'dart:io';
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import 'package:flutter/material.dart';
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import 'package:myapp/core/lru_map.dart';
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import 'package:myapp/models/photo.dart';
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import 'package:photo_view/photo_view.dart';
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import 'package:share_extend/share_extend.dart';
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import 'extents_page_view.dart';
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class DetailPage extends StatefulWidget {
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final List<Photo> photos;
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final int selectedIndex;
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DetailPage(this.photos, this.selectedIndex, {Key key}) : super(key: key);
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@override
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_DetailPageState createState() => _DetailPageState();
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}
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class _DetailPageState extends State<DetailPage> {
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bool _shouldDisableScroll = false;
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int _selectedIndex = 0;
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@override
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Widget build(BuildContext context) {
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_selectedIndex = widget.selectedIndex;
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var pageController = PageController(initialPage: _selectedIndex);
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return Scaffold(
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appBar: AppBar(
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actions: <Widget>[
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IconButton(
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icon: Icon(Icons.share),
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onPressed: () {
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ShareExtend.share(
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widget.photos[_selectedIndex].localPath, "image");
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},
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)
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],
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),
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body: Center(
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child: Container(
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child: ExtentsPageView.extents(
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itemBuilder: (context, index) {
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return _buildItem(context, widget.photos[index]);
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},
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onPageChanged: (int index) {
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_selectedIndex = index;
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},
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physics: _shouldDisableScroll
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? NeverScrollableScrollPhysics()
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: PageScrollPhysics(),
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controller: pageController,
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itemCount: widget.photos.length,
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),
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),
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),
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);
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}
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Widget _buildItem(BuildContext context, Photo photo) {
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var image = ImageLruCache.getData(photo.localPath) == null
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? Image.file(
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File(photo.localPath),
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filterQuality: FilterQuality.low,
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)
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: ImageLruCache.getData(photo.localPath);
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ValueChanged<PhotoViewScaleState> scaleStateChangedCallback = (value) {
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var shouldDisableScroll;
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if (value == PhotoViewScaleState.initial) {
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shouldDisableScroll = false;
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} else {
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shouldDisableScroll = true;
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}
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if (shouldDisableScroll != _shouldDisableScroll) {
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setState(() {
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_shouldDisableScroll = shouldDisableScroll;
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});
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}
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};
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return PhotoView(
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imageProvider: image.image,
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scaleStateChangedCallback: scaleStateChangedCallback,
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minScale: PhotoViewComputedScale.contained,
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);
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}
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}
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