63 lines
1.5 KiB
Dart
63 lines
1.5 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/photo_loader.dart';
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import 'package:myapp/ui/loading_widget.dart';
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import 'package:provider/provider.dart';
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class ImageWidget extends StatefulWidget {
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final String path;
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const ImageWidget({
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Key key,
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this.path,
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}) : super(key: key);
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@override
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_ImageWidgetState createState() => _ImageWidgetState();
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}
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class _ImageWidgetState extends State<ImageWidget> {
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PhotoLoader get photoLoader => Provider.of<PhotoLoader>(context);
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@override
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Widget build(BuildContext context) {
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final path = widget.path;
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final size = 124;
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final cachedImage = ImageLruCache.getData(path, size);
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Widget image;
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if (cachedImage != null) {
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image = cachedImage;
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} else {
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image = FutureBuilder<Image>(
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future: _buildImageWidget(path, size),
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builder: (context, snapshot) {
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if (snapshot.hasData) {
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ImageLruCache.setData(path, size, snapshot.data);
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return snapshot.data;
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} else {
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return loadWidget;
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}
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},
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);
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}
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return image;
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}
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Future<Image> _buildImageWidget(String path, num size) async {
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return Image.file(File(path),
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width: size.toDouble(), height: size.toDouble(), fit: BoxFit.cover);
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}
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@override
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void didUpdateWidget(ImageWidget oldWidget) {
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super.didUpdateWidget(oldWidget);
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if (widget.path != oldWidget.path) {
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setState(() {});
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}
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}
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}
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