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fluffychat/lib/widgets/content_banner.dart

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import 'dart:ui';
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import 'package:flutter/material.dart';
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import 'package:cached_network_image/cached_network_image.dart';
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import 'package:matrix/matrix.dart';
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import 'matrix.dart';
class ContentBanner extends StatelessWidget {
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final Uri? mxContent;
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final double height;
final IconData defaultIcon;
final bool loading;
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final void Function()? onEdit;
final Client? client;
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final double opacity;
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const ContentBanner(
{this.mxContent,
this.height = 400,
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this.defaultIcon = Icons.people_outlined,
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this.loading = false,
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this.onEdit,
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this.client,
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this.opacity = 0.75,
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Key? key})
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: super(key: key);
@override
Widget build(BuildContext context) {
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final onEdit = this.onEdit;
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return Container(
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height: height,
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alignment: Alignment.center,
decoration: BoxDecoration(
color: Theme.of(context).secondaryHeaderColor,
),
child: Stack(
children: <Widget>[
Positioned(
left: 0,
right: 0,
top: 0,
bottom: 0,
child: Opacity(
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opacity: opacity,
child: (!loading)
? LayoutBuilder(builder:
(BuildContext context, BoxConstraints constraints) {
// #775 don't request new image resolution on every resize
// by rounding up to the next multiple of stepSize
const stepSize = 300;
final bannerSize =
constraints.maxWidth * window.devicePixelRatio;
final steppedBannerSize =
(bannerSize / stepSize).ceil() * stepSize;
final src = mxContent?.getThumbnail(
client ?? Matrix.of(context).client,
width: steppedBannerSize,
height: steppedBannerSize,
method: ThumbnailMethod.scale,
animated: true,
);
return CachedNetworkImage(
imageUrl: src.toString(),
height: 300,
fit: BoxFit.cover,
);
})
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: Icon(defaultIcon, size: 200),
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),
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),
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if (onEdit != null)
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Container(
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margin: const EdgeInsets.all(8),
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alignment: Alignment.bottomRight,
child: FloatingActionButton(
mini: true,
onPressed: onEdit,
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backgroundColor: Theme.of(context).backgroundColor,
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foregroundColor: Theme.of(context).textTheme.bodyText1?.color,
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child: const Icon(Icons.camera_alt_outlined),
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),
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),
],
),
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);
}
}