OptimizedCacheImageProvider class abstract
An ImageProvider to load images from the network with caching functionality.
- Inheritance
-
- Object
- ImageProvider<
OptimizedCacheImageProvider> - OptimizedCacheImageProvider
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.
constfactory
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