ImageStream class
A handle to an image resource.
ImageStream represents a handle to a dart:ui.Image object and its scale (together represented by an ImageInfo object). The underlying image object might change over time, either because the image is animating or because the underlying image resource was mutated.
ImageStream objects can also represent an image that hasn't finished loading.
ImageStream objects are backed by ImageStreamCompleter objects.
See also:
- ImageProvider, which has an example that includes the use of an ImageStream in a Widget.
- Inheritance
- Object
- Diagnosticable
- ImageStream
Constructors
- ImageStream()
- Create an initially unbound image stream. [...]
Properties
- completer → ImageStreamCompleter
-
The completer that has been assigned to this image stream. [...]
read-only
- key → Object
-
Returns an object which can be used with
==to determine if this ImageStream shares the same listeners list as another ImageStream. [...]read-only - hashCode → int
-
The hash code for this object. [...]
read-only, inherited
- runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
Methods
-
addListener(
ImageListener listener, { ImageErrorListener onError }) → void - Adds a listener callback that is called whenever a new concrete ImageInfo object is available. If a concrete image is already available, this object will call the listener synchronously. [...]
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node. [...]
override
-
removeListener(
ImageListener listener) → void -
Stop listening for new concrete ImageInfo objects and errors from
the
listener's associated ImageErrorListener. -
setCompleter(
ImageStreamCompleter value) → void - Assigns a particular ImageStreamCompleter to this ImageStream. [...]
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent 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
toStringDeep. [...]inherited -
toString(
{DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String -
Returns a string representation of this object.
inherited
-
toStringShort(
) → String -
A brief description of this object, usually just the runtimeType and the
hashCode. [...]
inherited
Operators
-
operator ==(
dynamic other) → bool -
The equality operator. [...]
inherited