OptimizedCacheImage class - optimized_cached_image library

Constructors

OptimizedCacheImage({Key? key, required String imageUrl, Map<String, String>? httpHeaders, ImageWidgetBuilder? imageBuilder, PlaceholderWidgetBuilder? placeholder, ProgressIndicatorBuilder? progressIndicatorBuilder, LoadingErrorWidgetBuilder? errorWidget, Duration? fadeOutDuration = const Duration(milliseconds: 1000), Curve fadeOutCurve = Curves.easeOut, Duration fadeInDuration = const Duration(milliseconds: 500), Curve fadeInCurve = Curves.easeIn, double? width, double? height, BoxFit? fit, AlignmentGeometry alignment = Alignment.center, ImageRepeat repeat = ImageRepeat.noRepeat, bool matchTextDirection = false, BaseCacheManager? cacheManager, bool useOldImageOnUrlChange = false, Color? color, FilterQuality filterQuality = FilterQuality.low, BlendMode? colorBlendMode, Duration? placeholderFadeInDuration, int? memCacheWidth, int? memCacheHeight, String? cacheKey, int? maxWidthDiskCache, int? maxHeightDiskCache, ImageRenderMethodForWeb? imageRenderMethodForWeb}): OptimizedCacheImage shows a network image using a caching mechanism. It also provides support for a placeholder, showing an error and fading into the loaded image. Next to that it supports most features of a default Image widget.

Properties

alignment → AlignmentGeometry: How to align the image within its bounds.
final
cacheKey → String?: The target image's cache key.
final
cacheManager → BaseCacheManager?: Option to use cachemanager with other settings
final
color → Color?: If non-null, this color is blended with each image pixel using colorBlendMode.
final
colorBlendMode → BlendMode?: Used to combine color with this image.
final
errorWidget → LoadingErrorWidgetBuilder?: Widget displayed while the target imageUrl failed loading.
final
fadeInCurve → Curve: The curve of the fade-in animation for the imageUrl.
final
fadeInDuration → Duration: The duration of the fade-in animation for the imageUrl.
final
fadeOutCurve → Curve: The curve of the fade-out animation for the placeholder.
final
fadeOutDuration → Duration?: The duration of the fade-out animation for the placeholder.
final
filterQuality → FilterQuality: Target the interpolation quality for image scaling.
final
fit → BoxFit?: How to inscribe the image into the space allocated during layout.
final
hashCode → int: The hash code for this object.
no setterinherited
height → double?: If non-null, require the image to have this height.
final
httpHeaders → Map<String, String>?: Optional headers for the http request of the image url
final
imageBuilder → ImageWidgetBuilder?: Optional builder to further customize the display of the image.
final
imageRenderMethodForWeb → ImageRenderMethodForWeb?: final
imageUrl → String: The target image that is displayed.
final
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
matchTextDirection → bool: Whether to paint the image in the direction of the TextDirection.
final
maxHeightDiskCache → int?: Will resize the image and store the resized image in the disk cache.
final
maxWidthDiskCache → int?: Will resize the image and store the resized image in the disk cache.
final
memCacheHeight → int?: Will resize the image in memory to have a certain height using ResizeImage
final
memCacheWidth → int?: Will resize the image in memory to have a certain width using ResizeImage
final
placeholder → PlaceholderWidgetBuilder?: Widget displayed while the target imageUrl is loading.
final
placeholderFadeInDuration → Duration?: The duration of the fade-in animation for the placeholder.
final
progressIndicatorBuilder → ProgressIndicatorBuilder?: Widget displayed while the target imageUrl is loading.
final
repeat → ImageRepeat: How to paint any portions of the layout bounds not covered by the image.
final
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
useOldImageOnUrlChange → bool: When set to true it will animate from the old image to the new image if the url changes.
final
width → double?: If non-null, require the image to have this width.
final

Methods

build(BuildContext context) → Widget: Describes the part of the user interface represented by this widget.
override
createElement() → StatelessElement: Creates a StatelessElement to manage this widget's location in the tree.
inherited
debugDescribeChildren() → List<DiagnosticsNode>: Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void: Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode: Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String: A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String: Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String: Returns a one-line detailed description of the object.
inherited
toStringShort() → String: A short, textual description of this widget.
inherited

Operators

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

Static Methods

evictFromCache(String url, {String? cacheKey, BaseCacheManager? cacheManager, double scale = 1.0}) → Future: Evict an image from both the disk file based caching system of the BaseCacheManager as the in memory ImageCache of the ImageProvider. url is used by both the disk and memory cache. The scale is only used to clear the image from the ImageCache.