69 lines
1.7 KiB
Dart
69 lines
1.7 KiB
Dart
import 'package:extended_image/extended_image.dart';
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import 'package:flutter/material.dart';
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typedef ImageBuilder = Widget Function(
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BuildContext context, ImageProvider imageProvider);
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typedef LoadingBuilder = Widget Function(
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BuildContext context, ImageChunkEvent? progress);
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typedef ErrorBuilder = Widget Function(
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BuildContext context, Object? lastException);
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extension Progress on ImageChunkEvent {
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double? get progress {
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if (expectedTotalBytes == null ||
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cumulativeBytesLoaded > expectedTotalBytes!) {
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return null;
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}
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return cumulativeBytesLoaded / expectedTotalBytes!;
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}
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}
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class CachedNetworkImage extends StatelessWidget {
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final String imageUrl;
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final double? height;
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final double? width;
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final BoxFit? fit;
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final bool cache;
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final ErrorBuilder? errorBuilder;
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final LoadingBuilder? loadingBuilder;
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final ImageBuilder? imageBuilder;
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const CachedNetworkImage({
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required this.imageUrl,
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this.errorBuilder,
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this.loadingBuilder,
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this.imageBuilder,
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this.height,
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this.width,
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this.fit,
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this.cache = true,
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super.key,
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});
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@override
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Widget build(BuildContext context) {
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return ExtendedImage.network(
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imageUrl,
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height: height,
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width: width,
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fit: fit,
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cache: cache,
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loadStateChanged: (state) {
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switch (state.extendedImageLoadState) {
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case LoadState.loading:
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return loadingBuilder?.call(context, state.loadingProgress) ??
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SizedBox(height: height, width: width);
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case LoadState.completed:
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return imageBuilder?.call(context, state.imageProvider);
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case LoadState.failed:
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return errorBuilder?.call(context, state.lastException);
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}
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},
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);
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}
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}
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