ImageStreamListener class Null safety
Interface for receiving notifications about the loading of an image.
This class overrides operator == and hashCode to compare the individual callbacks in the listener, meaning that if you add an instance of this class as a listener (e.g. via ImageStream.addListener), you can instantiate a different instance of this class when you remove the listener, and the listener will be properly removed as long as all associated callbacks are equal.
Used by ImageStream and ImageStreamCompleter.
- Annotations
Constructors
- ImageStreamListener(ImageListener onImage, {ImageChunkListener? onChunk, ImageErrorListener? onError})
-
Creates a new ImageStreamListener.
const
Properties
- hashCode → int
-
The hash code for this object.
read-onlyoverride
- onChunk → ImageChunkListener?
-
Callback for getting notified when a chunk of bytes has been received
during the loading of the image.
final
- onError → ImageErrorListener?
-
Callback for getting notified when an error occurs while loading an image.
final
- onImage → ImageListener
-
Callback for getting notified that an image is available.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
read-onlyinherited
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
override