OptimizedCacheImageProvider class abstract

An ImageProvider to load images from the network with caching functionality.

Inheritance

Constructors

OptimizedCacheImageProvider(String url, {int? maxHeight, int? maxWidth, String? cacheKey, double scale, @Deprecated('ErrorListener is deprecated, use listeners on the imagestream') ErrorListener? errorListener, Map<String, String>? headers, BaseCacheManager? cacheManager, ImageRenderMethodForWeb? imageRenderMethodForWeb})
Creates an object that fetches the image at the given URL.
const
factory

Properties

cacheKey String?
The Key from image for cache
no setter
cacheManager → BaseCacheManager?
Optional cache manager. If no cache manager is defined DefaultCacheManager() will be used.
no setter
errorListener ErrorListener?
The errorListener is called when the ImageProvider failed loading the image. Deprecated in favor of ImageStreamListener.onError.
no setter
hashCode int
The hash code for this object.
no setterinherited
headers Map<String, String>?
The HTTP headers that will be used to fetch image from network.
no setter
maxHeight int?
Max height in pixels for the image. When set the resized image is stored in the cache.
no setter
maxWidth int?
Max width in pixels for the image. When set the resized image is stored in the cache.
no setter
runtimeType Type
A representation of the runtime type of the object.
no setterinherited
scale double
The scale to place in the ImageInfo object of the image.
no setter
url String
The URL from which the image will be fetched.
no setter

Methods

createStream(ImageConfiguration configuration) ImageStream
Called by resolve to create the ImageStream it returns.
inherited
evict({ImageCache? cache, ImageConfiguration configuration = ImageConfiguration.empty}) Future<bool>
Evicts an entry from the image cache.
inherited
load(OptimizedCacheImageProvider key, dynamic decode) ImageStreamCompleter
loadBuffer(OptimizedCacheImageProvider key, DecoderBufferCallback decode) ImageStreamCompleter
Converts a key into an ImageStreamCompleter, and begins fetching the image.
inherited
loadImage(OptimizedCacheImageProvider key, ImageDecoderCallback decode) ImageStreamCompleter
Converts a key into an ImageStreamCompleter, and begins fetching the image.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
obtainCacheStatus({required ImageConfiguration configuration, ImageErrorListener? handleError}) Future<ImageCacheStatus?>
Returns the cache location for the key that this ImageProvider creates.
inherited
obtainKey(ImageConfiguration configuration) Future<OptimizedCacheImageProvider>
Converts an ImageProvider's settings plus an ImageConfiguration to a key that describes the precise image to load.
inherited
resolve(ImageConfiguration configuration) ImageStream
Resolves this image provider using the given configuration, returning an ImageStream.
inherited
resolveStreamForKey(ImageConfiguration configuration, ImageStream stream, OptimizedCacheImageProvider key, ImageErrorListener handleError) → void
Called by resolve with the key returned by obtainKey.
inherited
toString() String
A string representation of this object.
inherited

Operators

operator ==(Object other) bool
The equality operator.
inherited