ImageCacheStatus class Null safety
Information about how the ImageCache is tracking an image.
A pending image is one that has not completed yet. It may also be tracked as live because something is listening to it.
A keepAlive image is being held in the cache, which uses Least Recently Used semantics to determine when to evict an image. These images are subject to eviction based on ImageCache.maximumSizeBytes and ImageCache.maximumSize. It may be live, but not pending.
A live image is being held until its ImageStreamCompleter has no more listeners. It may also be pending or keepAlive.
An untracked image is not being cached.
To obtain an ImageCacheStatus, use ImageCache.statusForKey or ImageProvider.obtainCacheStatus.
- Annotations
Properties
- hashCode → int
-
The hash code for this object.
read-onlyoverride
- keepAlive → bool
-
An image that has been submitted to ImageCache.putIfAbsent, has
completed, fits based on the sizing rules of the cache, and has not been
evicted.
final
- live → bool
-
An image that has been submitted to ImageCache.putIfAbsent and has at
least one listener on its ImageStreamCompleter.
final
- pending → bool
-
An image that has been submitted to ImageCache.putIfAbsent, but
not yet completed.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
read-onlyinherited
- tracked → bool
-
An image that is tracked in some way by the ImageCache, whether
pending, keepAlive, or live.
read-only
- untracked → bool
-
An image that either has not been submitted to
ImageCache.putIfAbsent or has otherwise been evicted from the
keepAlive and live caches.
read-only
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
override