149 lines
4.4 KiB
Dart
149 lines
4.4 KiB
Dart
import 'dart:math';
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import 'dart:typed_data';
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import 'package:aves/model/image_decode_service.dart';
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import 'package:aves/model/image_entry.dart';
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import 'package:flutter/material.dart';
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import 'package:transparent_image/transparent_image.dart';
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class Thumbnail extends StatefulWidget {
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final ImageEntry entry;
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final double extent;
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final double devicePixelRatio;
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const Thumbnail({
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Key key,
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@required this.entry,
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@required this.extent,
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@required this.devicePixelRatio,
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}) : super(key: key);
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@override
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ThumbnailState createState() => ThumbnailState();
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}
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class ThumbnailState extends State<Thumbnail> {
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Future<Uint8List> _byteLoader;
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ImageEntry get entry => widget.entry;
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String get uri => widget.entry.uri;
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@override
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void initState() {
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super.initState();
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initByteLoader();
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}
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@override
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void didUpdateWidget(Thumbnail oldWidget) {
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super.didUpdateWidget(oldWidget);
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if (uri == oldWidget.entry.uri && widget.extent == oldWidget.extent) return;
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initByteLoader();
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}
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initByteLoader() {
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final dim = (widget.extent * widget.devicePixelRatio).round();
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_byteLoader = ImageDecodeService.getImageBytes(widget.entry, dim, dim);
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}
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@override
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void dispose() {
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ImageDecodeService.cancelGetImageBytes(uri);
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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final fontSize = min(14.0, (widget.extent / 8).roundToDouble());
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final iconSize = fontSize * 2;
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return DefaultTextStyle(
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style: TextStyle(
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color: Colors.grey[200],
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fontSize: fontSize,
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),
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child: Container(
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decoration: BoxDecoration(
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border: Border.all(
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color: Colors.grey.shade700,
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width: 0.5,
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),
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),
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child: FutureBuilder(
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future: _byteLoader,
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builder: (futureContext, AsyncSnapshot<Uint8List> snapshot) {
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final bytes = (snapshot.connectionState == ConnectionState.done && !snapshot.hasError) ? snapshot.data : kTransparentImage;
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return Stack(
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alignment: AlignmentDirectional.bottomStart,
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children: [
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Hero(
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tag: uri,
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child: LayoutBuilder(builder: (context, constraints) {
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// during hero animation back from a fullscreen image,
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// the image covers the whole screen (because of the 'fit' prop and the full screen hero constraints)
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// so we wrap the image to apply better constraints
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final dim = min(constraints.maxWidth, constraints.maxHeight);
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return Container(
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alignment: Alignment.center,
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constraints: BoxConstraints.tight(Size(dim, dim)),
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child: bytes.length > 0
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? Image.memory(
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bytes,
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width: dim,
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height: dim,
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fit: BoxFit.cover,
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)
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: Icon(Icons.error),
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);
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}),
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),
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if (entry.isVideo)
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VideoTag(
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entry: entry,
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iconSize: iconSize,
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)
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else if (entry.isGif)
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Icon(
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Icons.gif,
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size: iconSize,
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),
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],
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);
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}),
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),
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);
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}
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}
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class VideoTag extends StatelessWidget {
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final ImageEntry entry;
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final double iconSize;
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const VideoTag({Key key, this.entry, this.iconSize}) : super(key: key);
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@override
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Widget build(BuildContext context) {
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return Container(
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margin: EdgeInsets.all(1),
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padding: EdgeInsets.only(right: iconSize / 4),
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decoration: BoxDecoration(
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color: Color(0xBB000000),
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borderRadius: BorderRadius.all(
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Radius.circular(iconSize),
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),
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),
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child: Row(
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mainAxisSize: MainAxisSize.min,
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crossAxisAlignment: CrossAxisAlignment.center,
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children: [
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Icon(
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Icons.play_circle_outline,
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size: iconSize,
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),
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SizedBox(width: 2),
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Text(entry.durationText)
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],
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),
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);
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}
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}
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